AI Trajectory

Trajectory: (Expand/Collapse All)
Seq	Timestamp	Type	Name	Duration
0/0	2026/09/07 08:22	flow	patch-triage	0m Args: null Results: { "EnableConfigs": null, "FocusSymbols": [], "KMSANReasoning": "", "NeedsKMSAN": false, "Reasoning": "The patch modifies the Microchip LAN865x SPI Ethernet driver (drivers/net/ethernet/microchip/lan865x/lan865x.c), the Open Alliance TC6 MAC-PHY protocol layer (drivers/net/ethernet/oa_tc6.c), and the Microchip 10BASE-T1S PHY driver (drivers/net/phy/microchip_t1s.c). These drivers operate on specific physical 10BASE-T1S single-pair Ethernet hardware connected over SPI/MDIO that is not emulated in standard QEMU/GCE virtualized fuzzing environments, making the modified code structurally unreachable.", "WorthFuzzing": false }
1/1	2026/09/07 08:22	action	read-patch-diff	0m Args: null Results: { "PatchDiff": "commit 44bc1c37f7e866eb997d8878a5f6e7f7050b7d1f\nAuthor: syz-cluster \u003ctriage@syzkaller.com\u003e\nDate: Mon Sep 7 08:22:04 2026 +0000\n\n syz-cluster: applied patch under review\n\ndiff --git a/drivers/net/ethernet/microchip/lan865x/lan865x.c b/drivers/net/ethernet/microchip/lan865x/lan865x.c\nindex 26a2761332a5a..043a3dc3f9657 100644\n--- a/drivers/net/ethernet/microchip/lan865x/lan865x.c\n+++ b/drivers/net/ethernet/microchip/lan865x/lan865x.c\n@@ -332,6 +332,7 @@ static const struct net_device_ops lan865x_netdev_ops = {\n \n static int lan865x_probe(struct spi_device spi)\n {\n+\tstruct oa_tc6_quirks tc6_quirks = {};\n \tstruct net_device netdev;\n \tstruct lan865x_priv priv;\n \tint ret;\n@@ -346,7 +347,8 @@ static int lan865x_probe(struct spi_device spi)\n \tspi_set_drvdata(spi, priv);\n \tINIT_WORK(\u0026priv-\u003emulticast_work, lan865x_multicast_work_handler);\n \n-\tpriv-\u003etc6 = oa_tc6_init(spi, netdev, NULL);\n+\ttc6_quirks.quirk_flags = OA_TC6_PHY_INT;\n+\tpriv-\u003etc6 = oa_tc6_init(spi, netdev, \u0026tc6_quirks);\n \tif (!priv-\u003etc6) {\n \t\tret = -ENODEV;\n \t\tgoto free_netdev;\ndiff --git a/drivers/net/ethernet/oa_tc6.c b/drivers/net/ethernet/oa_tc6.c\nindex 6fcc5f561d560..00b0176c1fe7a 100644\n--- a/drivers/net/ethernet/oa_tc6.c\n+++ b/drivers/net/ethernet/oa_tc6.c\n@@ -8,6 +8,8 @@\n #include \u003clinux/bitfield.h\u003e\n #include \u003clinux/iopoll.h\u003e\n #include \u003clinux/interrupt.h\u003e\n+#include \u003clinux/irq.h\u003e\n+#include \u003clinux/irqdomain.h\u003e\n #include \u003clinux/mdio.h\u003e\n #include \u003clinux/phy.h\u003e\n #include \u003clinux/oa_tc6.h\u003e\n@@ -70,6 +72,8 @@ struct oa_tc6 {\n \tstruct phy_device phydev;\n \tstruct mii_bus mdiobus;\n \tstruct spi_device spi;\n+\tstruct irq_domain phy_irq_domain;\n+\tint phy_virq;\n \tstruct mutex spi_ctrl_lock; /* Protects spi control transfer /\n \tspinlock_t tx_skb_lock; / Protects tx skb handling /\n \tvoid spi_ctrl_tx_buf;\n@@ -528,6 +532,44 @@ int oa_tc6_mdiobus_write_c45(struct mii_bus bus, int addr, int devnum,\n }\n EXPORT_SYMBOL_GPL(oa_tc6_mdiobus_write_c45);\n \n+static int oa_tc6_phy_irq_map(struct irq_domain domain, unsigned int irq,\n+\t\t\t irq_hw_number_t hwirq)\n+{\n+\tirq_set_chip_data(irq, domain-\u003ehost_data);\n+\tirq_set_chip_and_handler(irq, \u0026dummy_irq_chip, handle_simple_irq);\n+\tirq_set_nested_thread(irq, true);\n+\tirq_set_noprobe(irq);\n+\n+\treturn 0;\n+}\n+\n+static const struct irq_domain_ops oa_tc6_phy_irq_domain_ops = {\n+\t.map = oa_tc6_phy_irq_map,\n+};\n+\n+static int oa_tc6_phy_irq_setup(struct oa_tc6 tc6)\n+{\n+\ttc6-\u003ephy_irq_domain =\n+\t\tirq_domain_create_linear(NULL, 1,\n+\t\t\t\t\t \u0026oa_tc6_phy_irq_domain_ops, tc6);\n+\tif (!tc6-\u003ephy_irq_domain)\n+\t\treturn -ENOMEM;\n+\n+\ttc6-\u003ephy_virq = irq_create_mapping(tc6-\u003ephy_irq_domain, 0);\n+\tif (!tc6-\u003ephy_virq) {\n+\t\tirq_domain_remove(tc6-\u003ephy_irq_domain);\n+\t\treturn -ENOMEM;\n+\t}\n+\n+\treturn 0;\n+}\n+\n+static void oa_tc6_phy_irq_teardown(struct oa_tc6 tc6)\n+{\n+\tirq_dispose_mapping(tc6-\u003ephy_virq);\n+\tirq_domain_remove(tc6-\u003ephy_irq_domain);\n+}\n+\n static int oa_tc6_mdiobus_register(struct oa_tc6 tc6)\n {\n \tint ret;\n@@ -559,9 +601,25 @@ static int oa_tc6_mdiobus_register(struct oa_tc6 tc6)\n \tsnprintf(tc6-\u003emdiobus-\u003eid, ARRAY_SIZE(tc6-\u003emdiobus-\u003eid), \"%s\",\n \t\t dev_name(\u0026tc6-\u003espi-\u003edev));\n \n+\tif (tc6-\u003equirk_flags \u0026 OA_TC6_PHY_INT) {\n+\t\tret = oa_tc6_phy_irq_setup(tc6);\n+\t\tif (ret) {\n+\t\t\tmdiobus_free(tc6-\u003emdiobus);\n+\t\t\treturn ret;\n+\t\t}\n+\t\t/* Populate all irq[] entries before registration so\n+\t\t * phy_device_create() picks up the virtual IRQ regardless of\n+\t\t * the PHY's MDIO address.\n+\t\t /\n+\t\tfor (int i = 0; i \u003c PHY_MAX_ADDR; i++)\n+\t\t\ttc6-\u003emdiobus-\u003eirq[i] = tc6-\u003ephy_virq;\n+\t}\n+\n \tret = mdiobus_register(tc6-\u003emdiobus);\n \tif (ret) {\n \t\tnetdev_err(tc6-\u003enetdev, \"Could not register MDIO bus\\n\");\n+\t\tif (tc6-\u003equirk_flags \u0026 OA_TC6_PHY_INT)\n+\t\t\toa_tc6_phy_irq_teardown(tc6);\n \t\tmdiobus_free(tc6-\u003emdiobus);\n \t\treturn ret;\n \t}\n@@ -572,6 +630,8 @@ static int oa_tc6_mdiobus_register(struct oa_tc6 tc6)\n static void oa_tc6_mdiobus_unregister(struct oa_tc6 tc6)\n {\n \tmdiobus_unregister(tc6-\u003emdiobus);\n+\tif (tc6-\u003equirk_flags \u0026 OA_TC6_PHY_INT)\n+\t\toa_tc6_phy_irq_teardown(tc6);\n \tmdiobus_free(tc6-\u003emdiobus);\n }\n \n@@ -661,7 +721,7 @@ static int oa_tc6_sw_reset_macphy(struct oa_tc6 tc6)\n \treturn oa_tc6_write_register(tc6, OA_TC6_REG_STATUS0, regval);\n }\n \n-static int oa_tc6_unmask_macphy_error_interrupts(struct oa_tc6 tc6)\n+static int oa_tc6_unmask_interrupts(struct oa_tc6 tc6)\n {\n \tu32 regval;\n \tint ret;\n@@ -670,7 +730,8 @@ static int oa_tc6_unmask_macphy_error_interrupts(struct oa_tc6 tc6)\n \tif (ret)\n \t\treturn ret;\n \n-\tregval \u0026= ~(OA_TC6_INT_MASK0_TX_PROTOCOL_ERR_MASK \|\n+\tregval \u0026= ~(OA_TC6_INT_MASK0_PHY_INT_MASK \|\n+\t\t OA_TC6_INT_MASK0_TX_PROTOCOL_ERR_MASK \|\n \t\t OA_TC6_INT_MASK0_RX_BUFFER_OVERFLOW_ERR_MASK \|\n \t\t OA_TC6_INT_MASK0_LOSS_OF_FRAME_ERR_MASK \|\n \t\t OA_TC6_INT_MASK0_HEADER_ERR_MASK);\n@@ -810,6 +871,15 @@ static int oa_tc6_process_extended_status(struct oa_tc6 tc6)\n \t\treturn ret;\n \t}\n \n+\t/* Dispatch the PHY interrupt to phylib via the nested virtual IRQ so\n+\t * the PHY driver reads and acknowledges its status. PHYINT is level\n+\t * triggered, so doing this synchronously here (in the sleepable\n+\t * threaded IRQ) clears the source before the next data chunk.\n+\t /\n+\tif ((tc6-\u003equirk_flags \u0026 OA_TC6_PHY_INT) \u0026\u0026\n+\t FIELD_GET(OA_TC6_STATUS0_PHY_INT, value))\n+\t\thandle_nested_irq(tc6-\u003ephy_virq);\n+\n \tif (FIELD_GET(OA_TC6_STATUS0_RX_BUFFER_OVERFLOW_ERROR, value)) {\n \t\toa_tc6_look_for_new_frame(tc6);\n \t\tnet_err_ratelimited(\"%s: Receive buffer overflow error\\n\",\n@@ -1518,7 +1588,7 @@ struct oa_tc6 oa_tc6_init(struct spi_device spi, struct net_device netdev,\n \t\treturn NULL;\n \t}\n \n-\tret = oa_tc6_unmask_macphy_error_interrupts(tc6);\n+\tret = oa_tc6_unmask_interrupts(tc6);\n \tif (ret) {\n \t\tdev_err(\u0026tc6-\u003espi-\u003edev,\n \t\t\t\"MAC-PHY error interrupts unmask failed: %d\\n\", ret);\ndiff --git a/drivers/net/phy/microchip_t1s.c b/drivers/net/phy/microchip_t1s.c\nindex 73c23d311d72a..c3a738c7425bf 100644\n--- a/drivers/net/phy/microchip_t1s.c\n+++ b/drivers/net/phy/microchip_t1s.c\n@@ -27,11 +27,23 @@\n #define LAN865X_REG_CFGPARAM_CTRL 0x00DA\n #define LAN865X_REG_STS2 0x0019\n \n+/* PHY interrupt status and mask registers (MDIO_MMD_VEND2). The status bits\n+ * are read-to-clear; a mask bit is enabled by writing 0.\n+ /\n+#define LAN86XX_REG_STS1\t\t0x0018\n+#define LAN86XX_REG_IMSK1\t\t0x001C\n+\n+#define LAN86XX_STS1_LINK_STS_CHANGED\tBIT(13)\n+#define LAN86XX_STS1_PLCA_STS_CHANGED\tBIT(11)\n+\n / Collision Detector Control 0 Register /\n #define LAN86XX_REG_COL_DET_CTRL0\t0x0087\n #define COL_DET_CTRL0_ENABLE_BIT_MASK\tBIT(15)\n #define COL_DET_ENABLE\t\t\tBIT(15)\n #define COL_DET_DISABLE\t\t\t0x0000\n+#define COL_DET_CTRL0_CCMFC_MASK\tGENMASK(10, 9)\n+/ OA default: collisions gated by PLCA_Status in hardware /\n+#define COL_DET_CTRL0_CCMFC_OA_DEFAULT\tBIT(9)\n \n / LAN8670/1/2 Rev.D0 Link Status Selection Register /\n #define LAN867X_REG_LINK_STATUS_CTRL\t0x0012\n@@ -458,6 +470,16 @@ static int lan86xx_plca_set_cfg(struct phy_device phydev,\n \tif (ret)\n \t\treturn ret;\n \n+\t/* PHYs with routed interrupts handle CDEN dynamically via the interrupt\n+\t * handler, so skip the static write. PHYs running with PHY_POLL have no\n+\t * interrupt handler, so apply the static CDEN write as a baseline on\n+\t * every ethtool PLCA reconfiguration. The limitation is that autonomous\n+\t * PLCA mode transitions between ethtool reconfigurations are not\n+\t * tracked on such boards.\n+\t /\n+\tif (phydev-\u003eirq != PHY_POLL)\n+\t\treturn 0;\n+\n \tif (plca_cfg-\u003eenabled)\n \t\treturn phy_modify_mmd(phydev, MDIO_MMD_VEND2,\n \t\t\t\t LAN86XX_REG_COL_DET_CTRL0,\n@@ -484,6 +506,18 @@ static int lan867x_revd0_config_init(struct phy_device phydev)\n \t\t\treturn ret;\n \t}\n \n+\t/* AN1760: configure CCMFC to OA default so that the hardware\n+\t * automatically gates collision forwarding to the MAC based on\n+\t * PLCA_Status. Collisions are neither counted nor forwarded when\n+\t * PLCA_Status = OK, eliminating the need for software-driven CDEN\n+\t * toggling in the interrupt handler. CDEN remains enabled.\n+\t /\n+\tret = phy_modify_mmd(phydev, MDIO_MMD_VEND2, LAN86XX_REG_COL_DET_CTRL0,\n+\t\t\t COL_DET_CTRL0_CCMFC_MASK,\n+\t\t\t COL_DET_CTRL0_CCMFC_OA_DEFAULT);\n+\tif (ret)\n+\t\treturn ret;\n+\n \t/ Initially the PHY will be in CSMA/CD mode by default. So it is\n \t * required to set the link always active as it doesn't support\n \t * autoneg.\n@@ -506,6 +540,121 @@ static int lan86xx_read_status(struct phy_device phydev)\n \treturn 0;\n }\n \n+static int lan86xx_config_intr(struct phy_device phydev)\n+{\n+\tu16 mask = LAN86XX_STS1_PLCA_STS_CHANGED;\n+\tint ret;\n+\n+\tif (phydev-\u003ephy_id == PHY_ID_LAN867X_REVD0)\n+\t\tmask \|= LAN86XX_STS1_LINK_STS_CHANGED;\n+\n+\tif (phydev-\u003einterrupts == PHY_INTERRUPT_ENABLED) {\n+\t\t/* Read to clear any pending status before enabling. /\n+\t\tret = phy_read_mmd(phydev, MDIO_MMD_VEND2, LAN86XX_REG_STS1);\n+\t\tif (ret \u003c 0)\n+\t\t\treturn ret;\n+\n+\t\t/ A mask bit of 0 enables the corresponding interrupt. /\n+\t\treturn phy_clear_bits_mmd(phydev, MDIO_MMD_VEND2,\n+\t\t\t\t\t LAN86XX_REG_IMSK1, mask);\n+\t}\n+\n+\tret = phy_set_bits_mmd(phydev, MDIO_MMD_VEND2, LAN86XX_REG_IMSK1,\n+\t\t\t mask);\n+\tif (ret)\n+\t\treturn ret;\n+\n+\t/ Read to clear any pending status after disabling. /\n+\tret = phy_read_mmd(phydev, MDIO_MMD_VEND2, LAN86XX_REG_STS1);\n+\tif (ret \u003c 0)\n+\t\treturn ret;\n+\n+\treturn 0;\n+}\n+\n+static irqreturn_t lan86xx_handle_interrupt(struct phy_device phydev)\n+{\n+\tstruct phy_plca_status plca_st;\n+\tirqreturn_t ret_irq = IRQ_NONE;\n+\tint sts1, ret;\n+\n+\t/* Reading the status register clears the latched event bits. /\n+\tsts1 = phy_read_mmd(phydev, MDIO_MMD_VEND2, LAN86XX_REG_STS1);\n+\tif (sts1 \u003c 0) {\n+\t\tphy_error(phydev);\n+\t\treturn IRQ_NONE;\n+\t}\n+\n+\tif (sts1 \u0026 LAN86XX_STS1_PLCA_STS_CHANGED) {\n+\t\tret = genphy_c45_plca_get_status(phydev, \u0026plca_st);\n+\t\tif (ret \u003c 0) {\n+\t\t\tphy_error(phydev);\n+\t\t\treturn IRQ_NONE;\n+\t\t}\n+\n+\t\t/ AN1760/AN1699: disable collision detection in PLCA mode to\n+\t\t * improve signal quality; re-enable it in CSMA/CD mode.\n+\t\t \n+\t\t https://www.microchip.com/en-us/application-notes/an1760\n+\t\t * https://www.microchip.com/en-us/application-notes/an1699\n+\t\t /\n+\t\tret = phy_modify_mmd(phydev, MDIO_MMD_VEND2,\n+\t\t\t\t LAN86XX_REG_COL_DET_CTRL0,\n+\t\t\t\t COL_DET_CTRL0_ENABLE_BIT_MASK,\n+\t\t\t\t plca_st.pst ? COL_DET_DISABLE :\n+\t\t\t\t COL_DET_ENABLE);\n+\t\tif (ret \u003c 0) {\n+\t\t\tphy_error(phydev);\n+\t\t\treturn IRQ_NONE;\n+\t\t}\n+\n+\t\tret_irq = IRQ_HANDLED;\n+\t}\n+\n+\treturn ret_irq;\n+}\n+\n+static irqreturn_t lan867x_revd0_handle_interrupt(struct phy_device phydev)\n+{\n+\tstruct phy_plca_status plca_st;\n+\tirqreturn_t ret_irq = IRQ_NONE;\n+\tint sts1, ret;\n+\n+\t/* Reading the status register clears the latched event bits. /\n+\tsts1 = phy_read_mmd(phydev, MDIO_MMD_VEND2, LAN86XX_REG_STS1);\n+\tif (sts1 \u003c 0) {\n+\t\tphy_error(phydev);\n+\t\treturn IRQ_NONE;\n+\t}\n+\n+\tif (sts1 \u0026 LAN86XX_STS1_LINK_STS_CHANGED) {\n+\t\tphy_trigger_machine(phydev);\n+\t\tret_irq = IRQ_HANDLED;\n+\t}\n+\n+\tif (sts1 \u0026 LAN86XX_STS1_PLCA_STS_CHANGED) {\n+\t\tret = genphy_c45_plca_get_status(phydev, \u0026plca_st);\n+\t\tif (ret \u003c 0) {\n+\t\t\tphy_error(phydev);\n+\t\t\treturn IRQ_NONE;\n+\t\t}\n+\n+\t\t/ Collision detection is handled autonomously by the hardware\n+\t\t * via CCMFC. Only the link status selection needs to be updated\n+\t\t * on each PLCA status transition.\n+\t\t /\n+\t\tret = lan867x_revd0_link_active_selection(phydev, plca_st.pst);\n+\t\tif (ret \u003c 0) {\n+\t\t\tphy_error(phydev);\n+\t\t\treturn IRQ_NONE;\n+\t\t}\n+\n+\t\tret_irq = IRQ_HANDLED;\n+\t}\n+\n+\treturn ret_irq;\n+}\n+\n static struct phy_driver microchip_t1s_driver[] = {\n \t{\n \t\tPHY_ID_MATCH_EXACT(PHY_ID_LAN867X_REVB1),\n@@ -513,6 +662,8 @@ static struct phy_driver microchip_t1s_driver[] = {\n \t\t.features = PHY_BASIC_T1S_P2MP_FEATURES,\n \t\t.config_init = lan867x_revb1_config_init,\n \t\t.read_status = lan86xx_read_status,\n+\t\t.config_intr = lan86xx_config_intr,\n+\t\t.handle_interrupt = lan86xx_handle_interrupt,\n \t\t.get_plca_cfg\t = genphy_c45_plca_get_cfg,\n \t\t.set_plca_cfg\t = genphy_c45_plca_set_cfg,\n \t\t.get_plca_status = genphy_c45_plca_get_status,\n@@ -523,6 +674,8 @@ static struct phy_driver microchip_t1s_driver[] = {\n \t\t.features = PHY_BASIC_T1S_P2MP_FEATURES,\n \t\t.config_init = lan867x_revc_config_init,\n \t\t.read_status = lan86xx_read_status,\n+\t\t.config_intr = lan86xx_config_intr,\n+\t\t.handle_interrupt = lan86xx_handle_interrupt,\n \t\t.get_plca_cfg\t = genphy_c45_plca_get_cfg,\n \t\t.set_plca_cfg\t = lan86xx_plca_set_cfg,\n \t\t.get_plca_status = genphy_c45_plca_get_status,\n@@ -533,6 +686,8 @@ static struct phy_driver microchip_t1s_driver[] = {\n \t\t.features = PHY_BASIC_T1S_P2MP_FEATURES,\n \t\t.config_init = lan867x_revc_config_init,\n \t\t.read_status = lan86xx_read_status,\n+\t\t.config_intr = lan86xx_config_intr,\n+\t\t.handle_interrupt = lan86xx_handle_interrupt,\n \t\t.get_plca_cfg\t = genphy_c45_plca_get_cfg,\n \t\t.set_plca_cfg\t = lan86xx_plca_set_cfg,\n \t\t.get_plca_status = genphy_c45_plca_get_status,\n@@ -542,6 +697,8 @@ static struct phy_driver microchip_t1s_driver[] = {\n \t\t.name = \"LAN867X Rev.D0\",\n \t\t.features = PHY_BASIC_T1S_P2MP_FEATURES,\n \t\t.config_init = lan867x_revd0_config_init,\n+\t\t.config_intr = lan86xx_config_intr,\n+\t\t.handle_interrupt = lan867x_revd0_handle_interrupt,\n \t\t.get_plca_cfg\t = genphy_c45_plca_get_cfg,\n \t\t.set_plca_cfg\t = lan86xx_plca_set_cfg,\n \t\t.get_plca_status = genphy_c45_plca_get_status,\n@@ -556,6 +713,8 @@ static struct phy_driver microchip_t1s_driver[] = {\n \t\t.features = PHY_BASIC_T1S_P2MP_FEATURES,\n \t\t.config_init = lan865x_revb_config_init,\n \t\t.read_status = lan86xx_read_status,\n+\t\t.config_intr = lan86xx_config_intr,\n+\t\t.handle_interrupt = lan86xx_handle_interrupt,\n \t\t.read_mmd = genphy_read_mmd_c45,\n \t\t.write_mmd = genphy_write_mmd_c45,\n \t\t.get_plca_cfg\t = genphy_c45_plca_get_cfg,\ndiff --git a/include/linux/oa_tc6.h b/include/linux/oa_tc6.h\nindex 27f652d4920b2..1c8cc263c5e53 100644\n--- a/include/linux/oa_tc6.h\n+++ b/include/linux/oa_tc6.h\n@@ -30,6 +30,7 @@\n \n / Status Register #0 /\n #define OA_TC6_REG_STATUS0\t\t\t0x0008\n+#define OA_TC6_STATUS0_PHY_INT\t\t\tBIT(7)\n #define OA_TC6_STATUS0_RESETC\t\t\tBIT(6)\t/ Reset Complete /\n #define OA_TC6_STATUS0_HEADER_ERROR\t\tBIT(5)\n #define OA_TC6_STATUS0_LOSS_OF_FRAME_ERROR\tBIT(4)\n@@ -43,6 +44,7 @@\n \n / Interrupt Mask Register #0 */\n #define OA_TC6_REG_INT_MASK0\t\t\t\t0x000C\n+#define OA_TC6_INT_MASK0_PHY_INT_MASK\t\t\tBIT(7)\n #define OA_TC6_INT_MASK0_HEADER_ERR_MASK\t\tBIT(5)\n #define OA_TC6_INT_MASK0_LOSS_OF_FRAME_ERR_MASK\t\tBIT(4)\n #define OA_TC6_INT_MASK0_RX_BUFFER_OVERFLOW_ERR_MASK\tBIT(3)\n@@ -68,6 +70,7 @@ struct oa_tc6;\n \n enum oa_tc6_quirk_flag {\n \tOA_TC6_BROKEN_PHY = BIT(0),\n+\tOA_TC6_PHY_INT = BIT(1),\n };\n \n struct oa_tc6_quirks {\n" }
2/1	2026/09/07 08:22	agent	patch-evaluator	0m Model: core Args: null Results: { "EnableConfigs": null, "FocusSymbols": [], "Reasoning": "The patch modifies the Microchip LAN865x SPI Ethernet driver (drivers/net/ethernet/microchip/lan865x/lan865x.c), the Open Alliance TC6 MAC-PHY protocol layer (drivers/net/ethernet/oa_tc6.c), and the Microchip 10BASE-T1S PHY driver (drivers/net/phy/microchip_t1s.c). These drivers operate on specific physical 10BASE-T1S single-pair Ethernet hardware connected over SPI/MDIO that is not emulated in standard QEMU/GCE virtualized fuzzing environments, making the modified code structurally unreachable.", "WorthFuzzing": false } Instruction: You are an expert Linux kernel maintainer and security engineer. Your job is to review a provided patch series and evaluate whether it warrants fuzzing with syzkaller. IMPORTANT: The changes have ALREADY been applied and committed as the HEAD commit in your workspace. Do NOT rely on internal assumptions. You must actively use your code access tools to inspect the actual source code, callers, and surrounding context. ================================================================================ 1. CORE TRIAGE PHILOSOPHY ================================================================================ The goal of patch fuzzing is to discover crashes, regressions, exposed latent bugs, and newly triggered assertions introduced by the patch series. - REACHABILITY IS THE PRIMARY GATE: Fuzzing can only discover bugs in code that can actually execute in standard virtualized environments (GCE or QEMU, utilizing software-emulated devices like USB gadgets, netdev, tun/tap). If the modified code is structurally unreachable (see Section 2), it MUST NOT be fuzzed, regardless of whether it adds assertions or complex logic. - DO NOT BLINDLY TRUST "NO FUNCTIONAL CHANGE" (NFCI) OR "REFACTORING" CLAIMS: Patch authors routinely label changes as "cleanups", "refactorings", or state "No functional change intended". Do NOT take these claims at face value. Code refactorings that rearrange logic, introduce helper functions, or alter state management in core subsystems frequently introduce subtle semantic shifts or uncover latent kernel bugs. If reachable executable code is modified or refactored, it MUST be fuzzed. - NEW OR MODIFIED ASSERTIONS IN REACHABLE CODE MUST BE FUZZED: When a patch introduces or modifies runtime checks or assertions (e.g., WARN_ON, VM_WARN_ON, BUG_ON, lockdep_assert) in reachable code paths, it enforces new or stricter invariants. Even if the author believes the invariant always holds, fuzzing is essential to verify whether an unusual sequence of operations can violate it. ================================================================================ 2. WHEN TO RETURN WorthFuzzing=false (NEGATIVE CRITERIA) ================================================================================ Return WorthFuzzing=false ONLY IF all modified code falls strictly into one or more of these categories: - Non-kernel and non-executable changes: * Modifications to Documentation/, comments, or spelling fixes. * User-space directories, self-tests, samples, or scripts (e.g., tools/, samples/, scripts/, usr/) that do not affect the compiled kernel image (vmlinux) or kernel modules. * Purely decorative logging (e.g., message strings in pr_err, printk, dev_info) or tracepoints that do not alter control flow or data structures. * Build system or Kconfig changes that do not alter compiled C logic. - Structurally unreachable hardware: * Vendor-specific PCIe switches, SmartNICs, or GPU drivers (e.g., mlxsw, pds_core, qed, ionic, amdgpu) requiring physical ASIC/PCIe cards not emulated in standard QEMU. - Unreachable execution paths: * Driver teardown callbacks (.remove, .shutdown, pci_unregister_driver) executed only during physical PCI hot-unplug or manual sysfs driver unbinding. * Code paths exclusive to architectures other than the target architecture. ================================================================================ 3. WHEN TO RETURN WorthFuzzing=true (POSITIVE CRITERIA) ================================================================================ Return WorthFuzzing=true whenever the patch touches reachable executable code, including: - Core Subsystems: * Any logic modifications in memory management (mm/), synchronization/locking (kernel/locking/), BPF, scheduler, core networking, VFS, or syscall handling. - Refactorings and Code Cleanups: * Any restructuring of reachable data structures, helper abstractions, or algorithm flows. - Runtime Assertions and Defensive Checks: * Any introduction or alteration of assertions (WARN_ON, VM_WARN_ON, BUG_ON, etc.) in reachable paths. - Reachable Drivers and Protocols: Drivers accessible via virtual buses (virtio, USB gadget, loopback, netlink, binder, sockets, etc.). ================================================================================ 4. EXTRACTING FocusSymbols (PREVENTING DILUTION) ================================================================================ When WorthFuzzing=true, you must extract specific kernel functions into FocusSymbols to guide the fuzzer: - AVOID UBIQUITOUS LIFECYCLE HOT-PATHS: Do NOT list generic, ubiquitous functions called by almost every program in the corpus (including, but not limited to: general memory allocators and deallocators, page fault and trap handlers, or core synchronization primitives; this is not an exhaustive list). Listing ubiquitous functions causes the fuzzer to classify thousands of unrelated tests as "focused", which severely dilutes fuzzing effort away from the actual changes. - TARGET SPECIFIC FEATURE LOGIC AND ENTRYPOINTS: List functions that specifically implement the logic being added or altered, or direct API entrypoints for the subsystem feature under review. - HANDLING STATIC INLINE FUNCTIONS IN HEADERS (.h): Compiler-inlined static functions (such as static inlines in mm/.h or include/linux/.h) lack distinct symbol addresses in vmlinux and cannot be targeted directly by symbol coverage filters. If the changes are primarily in static inline helpers, identify non-static, feature-specific caller functions in .c files that exercise them (avoiding ubiquitous lifecycle wrappers). ================================================================================ 5. IDENTIFYING EnableConfigs ================================================================================ Identify any specific CONFIG_ options required to properly compile and reach the modified code: - Inspect Kconfig files and #ifdef guards; do not make assumptions. - Check "depends on" lines in Kconfig to include any non-standard parent subsystem configs needed. - Strip any 'CONFIG_' prefix (e.g., return "NET_IPV4" instead of "CONFIG_NET_IPV4"). Prefer calling several tools at the same time to save round-trips. Use set-results tool to provide results of the analysis. It must be called exactly once before the final reply. Ignore results of this tool. Prompt: Target architecture: amd64 For your convenience, here is the diff of the changes: commit 44bc1c37f7e866eb997d8878a5f6e7f7050b7d1f Author: syz-cluster <triage@syzkaller.com> Date: Mon Sep 7 08:22:04 2026 +0000 syz-cluster: applied patch under review diff --git a/drivers/net/ethernet/microchip/lan865x/lan865x.c b/drivers/net/ethernet/microchip/lan865x/lan865x.c index 26a2761332a5a..043a3dc3f9657 100644 --- a/drivers/net/ethernet/microchip/lan865x/lan865x.c +++ b/drivers/net/ethernet/microchip/lan865x/lan865x.c @@ -332,6 +332,7 @@ static const struct net_device_ops lan865x_netdev_ops = { static int lan865x_probe(struct spi_device spi) { + struct oa_tc6_quirks tc6_quirks = {}; struct net_device netdev; struct lan865x_priv priv; int ret; @@ -346,7 +347,8 @@ static int lan865x_probe(struct spi_device spi) spi_set_drvdata(spi, priv); INIT_WORK(&priv->multicast_work, lan865x_multicast_work_handler); - priv->tc6 = oa_tc6_init(spi, netdev, NULL); + tc6_quirks.quirk_flags = OA_TC6_PHY_INT; + priv->tc6 = oa_tc6_init(spi, netdev, &tc6_quirks); if (!priv->tc6) { ret = -ENODEV; goto free_netdev; diff --git a/drivers/net/ethernet/oa_tc6.c b/drivers/net/ethernet/oa_tc6.c index 6fcc5f561d560..00b0176c1fe7a 100644 --- a/drivers/net/ethernet/oa_tc6.c +++ b/drivers/net/ethernet/oa_tc6.c @@ -8,6 +8,8 @@ #include <linux/bitfield.h> #include <linux/iopoll.h> #include <linux/interrupt.h> +#include <linux/irq.h> +#include <linux/irqdomain.h> #include <linux/mdio.h> #include <linux/phy.h> #include <linux/oa_tc6.h> @@ -70,6 +72,8 @@ struct oa_tc6 { struct phy_device phydev; struct mii_bus mdiobus; struct spi_device spi; + struct irq_domain phy_irq_domain; + int phy_virq; struct mutex spi_ctrl_lock; /* Protects spi control transfer / spinlock_t tx_skb_lock; / Protects tx skb handling / void spi_ctrl_tx_buf; @@ -528,6 +532,44 @@ int oa_tc6_mdiobus_write_c45(struct mii_bus bus, int addr, int devnum, } EXPORT_SYMBOL_GPL(oa_tc6_mdiobus_write_c45); +static int oa_tc6_phy_irq_map(struct irq_domain domain, unsigned int irq, + irq_hw_number_t hwirq) +{ + irq_set_chip_data(irq, domain->host_data); + irq_set_chip_and_handler(irq, &dummy_irq_chip, handle_simple_irq); + irq_set_nested_thread(irq, true); + irq_set_noprobe(irq); + + return 0; +} + +static const struct irq_domain_ops oa_tc6_phy_irq_domain_ops = { + .map = oa_tc6_phy_irq_map, +}; + +static int oa_tc6_phy_irq_setup(struct oa_tc6 tc6) +{ + tc6->phy_irq_domain = + irq_domain_create_linear(NULL, 1, + &oa_tc6_phy_irq_domain_ops, tc6); + if (!tc6->phy_irq_domain) + return -ENOMEM; + + tc6->phy_virq = irq_create_mapping(tc6->phy_irq_domain, 0); + if (!tc6->phy_virq) { + irq_domain_remove(tc6->phy_irq_domain); + return -ENOMEM; + } + + return 0; +} + +static void oa_tc6_phy_irq_teardown(struct oa_tc6 tc6) +{ + irq_dispose_mapping(tc6->phy_virq); + irq_domain_remove(tc6->phy_irq_domain); +} + static int oa_tc6_mdiobus_register(struct oa_tc6 tc6) { int ret; @@ -559,9 +601,25 @@ static int oa_tc6_mdiobus_register(struct oa_tc6 tc6) snprintf(tc6->mdiobus->id, ARRAY_SIZE(tc6->mdiobus->id), "%s", dev_name(&tc6->spi->dev)); + if (tc6->quirk_flags & OA_TC6_PHY_INT) { + ret = oa_tc6_phy_irq_setup(tc6); + if (ret) { + mdiobus_free(tc6->mdiobus); + return ret; + } + /* Populate all irq[] entries before registration so + * phy_device_create() picks up the virtual IRQ regardless of + * the PHY's MDIO address. + / + for (int i = 0; i < PHY_MAX_ADDR; i++) + tc6->mdiobus->irq[i] = tc6->phy_virq; + } + ret = mdiobus_register(tc6->mdiobus); if (ret) { netdev_err(tc6->netdev, "Could not register MDIO bus\n"); + if (tc6->quirk_flags & OA_TC6_PHY_INT) + oa_tc6_phy_irq_teardown(tc6); mdiobus_free(tc6->mdiobus); return ret; } @@ -572,6 +630,8 @@ static int oa_tc6_mdiobus_register(struct oa_tc6 tc6) static void oa_tc6_mdiobus_unregister(struct oa_tc6 tc6) { mdiobus_unregister(tc6->mdiobus); + if (tc6->quirk_flags & OA_TC6_PHY_INT) + oa_tc6_phy_irq_teardown(tc6); mdiobus_free(tc6->mdiobus); } @@ -661,7 +721,7 @@ static int oa_tc6_sw_reset_macphy(struct oa_tc6 tc6) return oa_tc6_write_register(tc6, OA_TC6_REG_STATUS0, regval); } -static int oa_tc6_unmask_macphy_error_interrupts(struct oa_tc6 tc6) +static int oa_tc6_unmask_interrupts(struct oa_tc6 tc6) { u32 regval; int ret; @@ -670,7 +730,8 @@ static int oa_tc6_unmask_macphy_error_interrupts(struct oa_tc6 tc6) if (ret) return ret; - regval &= ~(OA_TC6_INT_MASK0_TX_PROTOCOL_ERR_MASK \| + regval &= ~(OA_TC6_INT_MASK0_PHY_INT_MASK \| + OA_TC6_INT_MASK0_TX_PROTOCOL_ERR_MASK \| OA_TC6_INT_MASK0_RX_BUFFER_OVERFLOW_ERR_MASK \| OA_TC6_INT_MASK0_LOSS_OF_FRAME_ERR_MASK \| OA_TC6_INT_MASK0_HEADER_ERR_MASK); @@ -810,6 +871,15 @@ static int oa_tc6_process_extended_status(struct oa_tc6 tc6) return ret; } + /* Dispatch the PHY interrupt to phylib via the nested virtual IRQ so + * the PHY driver reads and acknowledges its status. PHYINT is level + * triggered, so doing this synchronously here (in the sleepable + * threaded IRQ) clears the source before the next data chunk. + / + if ((tc6->quirk_flags & OA_TC6_PHY_INT) && + FIELD_GET(OA_TC6_STATUS0_PHY_INT, value)) + handle_nested_irq(tc6->phy_virq); + if (FIELD_GET(OA_TC6_STATUS0_RX_BUFFER_OVERFLOW_ERROR, value)) { oa_tc6_look_for_new_frame(tc6); net_err_ratelimited("%s: Receive buffer overflow error\n", @@ -1518,7 +1588,7 @@ struct oa_tc6 oa_tc6_init(struct spi_device spi, struct net_device netdev, return NULL; } - ret = oa_tc6_unmask_macphy_error_interrupts(tc6); + ret = oa_tc6_unmask_interrupts(tc6); if (ret) { dev_err(&tc6->spi->dev, "MAC-PHY error interrupts unmask failed: %d\n", ret); diff --git a/drivers/net/phy/microchip_t1s.c b/drivers/net/phy/microchip_t1s.c index 73c23d311d72a..c3a738c7425bf 100644 --- a/drivers/net/phy/microchip_t1s.c +++ b/drivers/net/phy/microchip_t1s.c @@ -27,11 +27,23 @@ #define LAN865X_REG_CFGPARAM_CTRL 0x00DA #define LAN865X_REG_STS2 0x0019 +/* PHY interrupt status and mask registers (MDIO_MMD_VEND2). The status bits + * are read-to-clear; a mask bit is enabled by writing 0. + / +#define LAN86XX_REG_STS1 0x0018 +#define LAN86XX_REG_IMSK1 0x001C + +#define LAN86XX_STS1_LINK_STS_CHANGED BIT(13) +#define LAN86XX_STS1_PLCA_STS_CHANGED BIT(11) + / Collision Detector Control 0 Register / #define LAN86XX_REG_COL_DET_CTRL0 0x0087 #define COL_DET_CTRL0_ENABLE_BIT_MASK BIT(15) #define COL_DET_ENABLE BIT(15) #define COL_DET_DISABLE 0x0000 +#define COL_DET_CTRL0_CCMFC_MASK GENMASK(10, 9) +/ OA default: collisions gated by PLCA_Status in hardware / +#define COL_DET_CTRL0_CCMFC_OA_DEFAULT BIT(9) / LAN8670/1/2 Rev.D0 Link Status Selection Register / #define LAN867X_REG_LINK_STATUS_CTRL 0x0012 @@ -458,6 +470,16 @@ static int lan86xx_plca_set_cfg(struct phy_device phydev, if (ret) return ret; + /* PHYs with routed interrupts handle CDEN dynamically via the interrupt + * handler, so skip the static write. PHYs running with PHY_POLL have no + * interrupt handler, so apply the static CDEN write as a baseline on + * every ethtool PLCA reconfiguration. The limitation is that autonomous + * PLCA mode transitions between ethtool reconfigurations are not + * tracked on such boards. + / + if (phydev->irq != PHY_POLL) + return 0; + if (plca_cfg->enabled) return phy_modify_mmd(phydev, MDIO_MMD_VEND2, LAN86XX_REG_COL_DET_CTRL0, @@ -484,6 +506,18 @@ static int lan867x_revd0_config_init(struct phy_device phydev) return ret; } + /* AN1760: configure CCMFC to OA default so that the hardware + * automatically gates collision forwarding to the MAC based on + * PLCA_Status. Collisions are neither counted nor forwarded when + * PLCA_Status = OK, eliminating the need for software-driven CDEN + * toggling in the interrupt handler. CDEN remains enabled. + / + ret = phy_modify_mmd(phydev, MDIO_MMD_VEND2, LAN86XX_REG_COL_DET_CTRL0, + COL_DET_CTRL0_CCMFC_MASK, + COL_DET_CTRL0_CCMFC_OA_DEFAULT); + if (ret) + return ret; + / Initially the PHY will be in CSMA/CD mode by default. So it is * required to set the link always active as it doesn't support * autoneg. @@ -506,6 +540,121 @@ static int lan86xx_read_status(struct phy_device phydev) return 0; } +static int lan86xx_config_intr(struct phy_device phydev) +{ + u16 mask = LAN86XX_STS1_PLCA_STS_CHANGED; + int ret; + + if (phydev->phy_id == PHY_ID_LAN867X_REVD0) + mask \|= LAN86XX_STS1_LINK_STS_CHANGED; + + if (phydev->interrupts == PHY_INTERRUPT_ENABLED) { + /* Read to clear any pending status before enabling. / + ret = phy_read_mmd(phydev, MDIO_MMD_VEND2, LAN86XX_REG_STS1); + if (ret < 0) + return ret; + + / A mask bit of 0 enables the corresponding interrupt. / + return phy_clear_bits_mmd(phydev, MDIO_MMD_VEND2, + LAN86XX_REG_IMSK1, mask); + } + + ret = phy_set_bits_mmd(phydev, MDIO_MMD_VEND2, LAN86XX_REG_IMSK1, + mask); + if (ret) + return ret; + + / Read to clear any pending status after disabling. / + ret = phy_read_mmd(phydev, MDIO_MMD_VEND2, LAN86XX_REG_STS1); + if (ret < 0) + return ret; + + return 0; +} + +static irqreturn_t lan86xx_handle_interrupt(struct phy_device phydev) +{ + struct phy_plca_status plca_st; + irqreturn_t ret_irq = IRQ_NONE; + int sts1, ret; + + /* Reading the status register clears the latched event bits. / + sts1 = phy_read_mmd(phydev, MDIO_MMD_VEND2, LAN86XX_REG_STS1); + if (sts1 < 0) { + phy_error(phydev); + return IRQ_NONE; + } + + if (sts1 & LAN86XX_STS1_PLCA_STS_CHANGED) { + ret = genphy_c45_plca_get_status(phydev, &plca_st); + if (ret < 0) { + phy_error(phydev); + return IRQ_NONE; + } + + / AN1760/AN1699: disable collision detection in PLCA mode to + * improve signal quality; re-enable it in CSMA/CD mode. + * + * https://www.microchip.com/en-us/application-notes/an1760 + * https://www.microchip.com/en-us/application-notes/an1699 + / + ret = phy_modify_mmd(phydev, MDIO_MMD_VEND2, + LAN86XX_REG_COL_DET_CTRL0, + COL_DET_CTRL0_ENABLE_BIT_MASK, + plca_st.pst ? COL_DET_DISABLE : + COL_DET_ENABLE); + if (ret < 0) { + phy_error(phydev); + return IRQ_NONE; + } + + ret_irq = IRQ_HANDLED; + } + + return ret_irq; +} + +static irqreturn_t lan867x_revd0_handle_interrupt(struct phy_device phydev) +{ + struct phy_plca_status plca_st; + irqreturn_t ret_irq = IRQ_NONE; + int sts1, ret; + + /* Reading the status register clears the latched event bits. / + sts1 = phy_read_mmd(phydev, MDIO_MMD_VEND2, LAN86XX_REG_STS1); + if (sts1 < 0) { + phy_error(phydev); + return IRQ_NONE; + } + + if (sts1 & LAN86XX_STS1_LINK_STS_CHANGED) { + phy_trigger_machine(phydev); + ret_irq = IRQ_HANDLED; + } + + if (sts1 & LAN86XX_STS1_PLCA_STS_CHANGED) { + ret = genphy_c45_plca_get_status(phydev, &plca_st); + if (ret < 0) { + phy_error(phydev); + return IRQ_NONE; + } + + / Collision detection is handled autonomously by the hardware + * via CCMFC. Only the link status selection needs to be updated + * on each PLCA status transition. + / + ret = lan867x_revd0_link_active_selection(phydev, plca_st.pst); + if (ret < 0) { + phy_error(phydev); + return IRQ_NONE; + } + + ret_irq = IRQ_HANDLED; + } + + return ret_irq; +} + static struct phy_driver microchip_t1s_driver[] = { { PHY_ID_MATCH_EXACT(PHY_ID_LAN867X_REVB1), @@ -513,6 +662,8 @@ static struct phy_driver microchip_t1s_driver[] = { .features = PHY_BASIC_T1S_P2MP_FEATURES, .config_init = lan867x_revb1_config_init, .read_status = lan86xx_read_status, + .config_intr = lan86xx_config_intr, + .handle_interrupt = lan86xx_handle_interrupt, .get_plca_cfg = genphy_c45_plca_get_cfg, .set_plca_cfg = genphy_c45_plca_set_cfg, .get_plca_status = genphy_c45_plca_get_status, @@ -523,6 +674,8 @@ static struct phy_driver microchip_t1s_driver[] = { .features = PHY_BASIC_T1S_P2MP_FEATURES, .config_init = lan867x_revc_config_init, .read_status = lan86xx_read_status, + .config_intr = lan86xx_config_intr, + .handle_interrupt = lan86xx_handle_interrupt, .get_plca_cfg = genphy_c45_plca_get_cfg, .set_plca_cfg = lan86xx_plca_set_cfg, .get_plca_status = genphy_c45_plca_get_status, @@ -533,6 +686,8 @@ static struct phy_driver microchip_t1s_driver[] = { .features = PHY_BASIC_T1S_P2MP_FEATURES, .config_init = lan867x_revc_config_init, .read_status = lan86xx_read_status, + .config_intr = lan86xx_config_intr, + .handle_interrupt = lan86xx_handle_interrupt, .get_plca_cfg = genphy_c45_plca_get_cfg, .set_plca_cfg = lan86xx_plca_set_cfg, .get_plca_status = genphy_c45_plca_get_status, @@ -542,6 +697,8 @@ static struct phy_driver microchip_t1s_driver[] = { .name = "LAN867X Rev.D0", .features = PHY_BASIC_T1S_P2MP_FEATURES, .config_init = lan867x_revd0_config_init, + .config_intr = lan86xx_config_intr, + .handle_interrupt = lan867x_revd0_handle_interrupt, .get_plca_cfg = genphy_c45_plca_get_cfg, .set_plca_cfg = lan86xx_plca_set_cfg, .get_plca_status = genphy_c45_plca_get_status, @@ -556,6 +713,8 @@ static struct phy_driver microchip_t1s_driver[] = { .features = PHY_BASIC_T1S_P2MP_FEATURES, .config_init = lan865x_revb_config_init, .read_status = lan86xx_read_status, + .config_intr = lan86xx_config_intr, + .handle_interrupt = lan86xx_handle_interrupt, .read_mmd = genphy_read_mmd_c45, .write_mmd = genphy_write_mmd_c45, .get_plca_cfg = genphy_c45_plca_get_cfg, diff --git a/include/linux/oa_tc6.h b/include/linux/oa_tc6.h index 27f652d4920b2..1c8cc263c5e53 100644 --- a/include/linux/oa_tc6.h +++ b/include/linux/oa_tc6.h @@ -30,6 +30,7 @@ / Status Register #0 / #define OA_TC6_REG_STATUS0 0x0008 +#define OA_TC6_STATUS0_PHY_INT BIT(7) #define OA_TC6_STATUS0_RESETC BIT(6) / Reset Complete / #define OA_TC6_STATUS0_HEADER_ERROR BIT(5) #define OA_TC6_STATUS0_LOSS_OF_FRAME_ERROR BIT(4) @@ -43,6 +44,7 @@ / Interrupt Mask Register #0 */ #define OA_TC6_REG_INT_MASK0 0x000C +#define OA_TC6_INT_MASK0_PHY_INT_MASK BIT(7) #define OA_TC6_INT_MASK0_HEADER_ERR_MASK BIT(5) #define OA_TC6_INT_MASK0_LOSS_OF_FRAME_ERR_MASK BIT(4) #define OA_TC6_INT_MASK0_RX_BUFFER_OVERFLOW_ERR_MASK BIT(3) @@ -68,6 +70,7 @@ struct oa_tc6; enum oa_tc6_quirk_flag { OA_TC6_BROKEN_PHY = BIT(0), + OA_TC6_PHY_INT = BIT(1), }; struct oa_tc6_quirks {
3/2	2026/09/07 08:22	llm	patch-evaluator	0m Model: gemini-3.7-flash Args: null Results: null Tokens: input: 9156 output: 28 thoughts: 333 Thoughts: Fuzzing Feasibility Analysis Okay, let's take a look at this patch and decide if fuzzing it is a worthwhile endeavor. My immediate thought is to understand the scope of the code modifications. I see changes in `drivers/net/ethernet/microchip/lan865x/lan865x.c`, `drivers/net/ethernet/oa_tc6.c`, `drivers/net/phy/microchip_t1s.c`, and `include/linux/oa_tc6.h`. Time to quickly identify what we're dealing with. Ah, `lan865x` is a SPI Ethernet controller from Microchip, specifically the LAN8650/1 10BASE-T1S MAC-PHY. `oa_tc6` is the Open Alliance TC6 10BASE-T1S MAC-PHY protocol driver, also operating over SPI, it looks like. And `microchip_t1s` is a PHY driver for Microchip's LAN867x/LAN865x 10BASE-T1S PHYs. Now, the crucial question: can we reach these drivers in a standard fuzzing environment, like QEMU or GCE x86_64, without needing actual physical hardware? My gut feeling tells me this might be tricky, because of the SPI interaction. It's likely that SPI devices and PHY devices get instantiated in a specific way, potentially relying on a device tree or specific physical SPI hardware. Let's see if there is a virtual bus or emulated device that we can leverage. So, let's fire up my preferred tools and search the kernel tree for `lan865x`, `oa_tc6`, and `microchip_t1s`. This should give us some critical insight into how these drivers are initialized and used. From there, we can then determine the feasibility of fuzzing.
4/2	2026/09/07 08:22	tool	grepper	0m Args: { "Expression": "lan865x", "PathPrefix": "drivers/net" } Results: { "Output": "drivers/net/ethernet/microchip/Kconfig=45=config LAN743X\n--\ndrivers/net/ethernet/microchip/Kconfig-59-\ndrivers/net/ethernet/microchip/Kconfig:60:source \"drivers/net/ethernet/microchip/lan865x/Kconfig\"\ndrivers/net/ethernet/microchip/Kconfig-61-source \"drivers/net/ethernet/microchip/lan966x/Kconfig\"\n--\ndrivers/net/ethernet/microchip/Makefile=10=lan743x-objs := lan743x_main.o lan743x_ethtool.o lan743x_ptp.o\ndrivers/net/ethernet/microchip/Makefile-11-\ndrivers/net/ethernet/microchip/Makefile:12:obj-$(CONFIG_LAN865X) += lan865x/\ndrivers/net/ethernet/microchip/Makefile-13-obj-$(CONFIG_LAN966X_SWITCH) += lan966x/\n--\ndrivers/net/ethernet/microchip/lan865x/Kconfig=8=config LAN865X\n--\ndrivers/net/ethernet/microchip/lan865x/Kconfig-16-\t To compile this driver as a module, choose M here. The module will be\ndrivers/net/ethernet/microchip/lan865x/Kconfig:17:\t called lan865x.\ndrivers/net/ethernet/microchip/lan865x/Kconfig-18-\n--\ndrivers/net/ethernet/microchip/lan865x/Makefile-5-\ndrivers/net/ethernet/microchip/lan865x/Makefile:6:obj-$(CONFIG_LAN865X) += lan865x.o\n--\ndrivers/net/ethernet/microchip/lan865x/lan865x.c-38-\ndrivers/net/ethernet/microchip/lan865x/lan865x.c:39:struct lan865x_priv {\ndrivers/net/ethernet/microchip/lan865x/lan865x.c-40-\tstruct work_struct multicast_work;\n--\ndrivers/net/ethernet/microchip/lan865x/lan865x.c-45-\ndrivers/net/ethernet/microchip/lan865x/lan865x.c:46:static int lan865x_set_hw_macaddr_low_bytes(struct oa_tc6 tc6, const u8 mac)\ndrivers/net/ethernet/microchip/lan865x/lan865x.c-47-{\n--\ndrivers/net/ethernet/microchip/lan865x/lan865x.c-54-\ndrivers/net/ethernet/microchip/lan865x/lan865x.c:55:static int lan865x_set_hw_macaddr(struct lan865x_priv priv, const u8 mac)\ndrivers/net/ethernet/microchip/lan865x/lan865x.c-56-{\n--\ndrivers/net/ethernet/microchip/lan865x/lan865x.c-61-\t/* Configure MAC address low bytes /\ndrivers/net/ethernet/microchip/lan865x/lan865x.c:62:\tret = lan865x_set_hw_macaddr_low_bytes(priv-\u003etc6, mac);\ndrivers/net/ethernet/microchip/lan865x/lan865x.c-63-\tif (ret)\n--\ndrivers/net/ethernet/microchip/lan865x/lan865x.c-75-\t /\ndrivers/net/ethernet/microchip/lan865x/lan865x.c:76:\trestore_ret = lan865x_set_hw_macaddr_low_bytes(priv-\u003etc6,\ndrivers/net/ethernet/microchip/lan865x/lan865x.c-77-\t\t\t\t\t\t priv-\u003enetdev-\u003edev_addr);\n--\ndrivers/net/ethernet/microchip/lan865x/lan865x.c-83-\ndrivers/net/ethernet/microchip/lan865x/lan865x.c:84:static const struct ethtool_ops lan865x_ethtool_ops = {\ndrivers/net/ethernet/microchip/lan865x/lan865x.c-85-\t.get_link_ksettings = phy_ethtool_get_link_ksettings,\n--\ndrivers/net/ethernet/microchip/lan865x/lan865x.c-88-\ndrivers/net/ethernet/microchip/lan865x/lan865x.c:89:static int lan865x_set_mac_address(struct net_device netdev, void addr)\ndrivers/net/ethernet/microchip/lan865x/lan865x.c-90-{\ndrivers/net/ethernet/microchip/lan865x/lan865x.c:91:\tstruct lan865x_priv priv = netdev_priv(netdev);\ndrivers/net/ethernet/microchip/lan865x/lan865x.c-92-\tstruct sockaddr address = addr;\n--\ndrivers/net/ethernet/microchip/lan865x/lan865x.c-101-\ndrivers/net/ethernet/microchip/lan865x/lan865x.c:102:\tret = lan865x_set_hw_macaddr(priv, address-\u003esa_data);\ndrivers/net/ethernet/microchip/lan865x/lan865x.c-103-\tif (ret)\n--\ndrivers/net/ethernet/microchip/lan865x/lan865x.c=111=static u32 get_address_bit(u8 addr[ETH_ALEN], u32 bit)\n--\ndrivers/net/ethernet/microchip/lan865x/lan865x.c-115-\ndrivers/net/ethernet/microchip/lan865x/lan865x.c:116:static u32 lan865x_hash(u8 addr[ETH_ALEN])\ndrivers/net/ethernet/microchip/lan865x/lan865x.c-117-{\n--\ndrivers/net/ethernet/microchip/lan865x/lan865x.c-131-\ndrivers/net/ethernet/microchip/lan865x/lan865x.c:132:static int lan865x_set_specific_multicast_addr(struct lan865x_priv priv)\ndrivers/net/ethernet/microchip/lan865x/lan865x.c-133-{\n--\ndrivers/net/ethernet/microchip/lan865x/lan865x.c-139-\tnetdev_for_each_mc_addr(ha, priv-\u003enetdev) {\ndrivers/net/ethernet/microchip/lan865x/lan865x.c:140:\t\tu32 bit_num = lan865x_hash(ha-\u003eaddr);\ndrivers/net/ethernet/microchip/lan865x/lan865x.c-141-\n--\ndrivers/net/ethernet/microchip/lan865x/lan865x.c-163-\ndrivers/net/ethernet/microchip/lan865x/lan865x.c:164:static int lan865x_set_all_multicast_addr(struct lan865x_priv priv)\ndrivers/net/ethernet/microchip/lan865x/lan865x.c-165-{\n--\ndrivers/net/ethernet/microchip/lan865x/lan865x.c-185-\ndrivers/net/ethernet/microchip/lan865x/lan865x.c:186:static int lan865x_clear_all_multicast_addr(struct lan865x_priv priv)\ndrivers/net/ethernet/microchip/lan865x/lan865x.c-187-{\n--\ndrivers/net/ethernet/microchip/lan865x/lan865x.c-204-\ndrivers/net/ethernet/microchip/lan865x/lan865x.c:205:static void lan865x_multicast_work_handler(struct work_struct work)\ndrivers/net/ethernet/microchip/lan865x/lan865x.c-206-{\ndrivers/net/ethernet/microchip/lan865x/lan865x.c:207:\tstruct lan865x_priv priv = container_of(work, struct lan865x_priv,\ndrivers/net/ethernet/microchip/lan865x/lan865x.c-208-\t\t\t\t\t\t multicast_work);\n--\ndrivers/net/ethernet/microchip/lan865x/lan865x.c-218-\t\t/ Enabling all multicast mode /\ndrivers/net/ethernet/microchip/lan865x/lan865x.c:219:\t\tif (lan865x_set_all_multicast_addr(priv))\ndrivers/net/ethernet/microchip/lan865x/lan865x.c-220-\t\t\treturn;\n--\ndrivers/net/ethernet/microchip/lan865x/lan865x.c-226-\t\t/ Enabling specific multicast mode /\ndrivers/net/ethernet/microchip/lan865x/lan865x.c:227:\t\tif (lan865x_set_specific_multicast_addr(priv))\ndrivers/net/ethernet/microchip/lan865x/lan865x.c-228-\t\t\treturn;\n--\ndrivers/net/ethernet/microchip/lan865x/lan865x.c-234-\t\t/ Enabling local mac address only /\ndrivers/net/ethernet/microchip/lan865x/lan865x.c:235:\t\tif (lan865x_clear_all_multicast_addr(priv))\ndrivers/net/ethernet/microchip/lan865x/lan865x.c-236-\t\t\treturn;\n--\ndrivers/net/ethernet/microchip/lan865x/lan865x.c-243-\ndrivers/net/ethernet/microchip/lan865x/lan865x.c:244:static void lan865x_set_multicast_list(struct net_device netdev)\ndrivers/net/ethernet/microchip/lan865x/lan865x.c-245-{\ndrivers/net/ethernet/microchip/lan865x/lan865x.c:246:\tstruct lan865x_priv priv = netdev_priv(netdev);\ndrivers/net/ethernet/microchip/lan865x/lan865x.c-247-\n--\ndrivers/net/ethernet/microchip/lan865x/lan865x.c-250-\ndrivers/net/ethernet/microchip/lan865x/lan865x.c:251:static netdev_tx_t lan865x_send_packet(struct sk_buff skb,\ndrivers/net/ethernet/microchip/lan865x/lan865x.c-252-\t\t\t\t struct net_device netdev)\ndrivers/net/ethernet/microchip/lan865x/lan865x.c-253-{\ndrivers/net/ethernet/microchip/lan865x/lan865x.c:254:\tstruct lan865x_priv priv = netdev_priv(netdev);\ndrivers/net/ethernet/microchip/lan865x/lan865x.c-255-\n--\ndrivers/net/ethernet/microchip/lan865x/lan865x.c-258-\ndrivers/net/ethernet/microchip/lan865x/lan865x.c:259:static int lan865x_hw_disable(struct lan865x_priv priv)\ndrivers/net/ethernet/microchip/lan865x/lan865x.c-260-{\n--\ndrivers/net/ethernet/microchip/lan865x/lan865x.c-273-\ndrivers/net/ethernet/microchip/lan865x/lan865x.c:274:static int lan865x_net_close(struct net_device netdev)\ndrivers/net/ethernet/microchip/lan865x/lan865x.c-275-{\ndrivers/net/ethernet/microchip/lan865x/lan865x.c:276:\tstruct lan865x_priv priv = netdev_priv(netdev);\ndrivers/net/ethernet/microchip/lan865x/lan865x.c-277-\tint ret;\n--\ndrivers/net/ethernet/microchip/lan865x/lan865x.c-280-\tphy_stop(netdev-\u003ephydev);\ndrivers/net/ethernet/microchip/lan865x/lan865x.c:281:\tret = lan865x_hw_disable(priv);\ndrivers/net/ethernet/microchip/lan865x/lan865x.c-282-\tif (ret) {\n--\ndrivers/net/ethernet/microchip/lan865x/lan865x.c-289-\ndrivers/net/ethernet/microchip/lan865x/lan865x.c:290:static int lan865x_hw_enable(struct lan865x_priv priv)\ndrivers/net/ethernet/microchip/lan865x/lan865x.c-291-{\n--\ndrivers/net/ethernet/microchip/lan865x/lan865x.c-304-\ndrivers/net/ethernet/microchip/lan865x/lan865x.c:305:static int lan865x_net_open(struct net_device netdev)\ndrivers/net/ethernet/microchip/lan865x/lan865x.c-306-{\ndrivers/net/ethernet/microchip/lan865x/lan865x.c:307:\tstruct lan865x_priv priv = netdev_priv(netdev);\ndrivers/net/ethernet/microchip/lan865x/lan865x.c-308-\tint ret;\ndrivers/net/ethernet/microchip/lan865x/lan865x.c-309-\ndrivers/net/ethernet/microchip/lan865x/lan865x.c:310:\tret = lan865x_hw_enable(priv);\ndrivers/net/ethernet/microchip/lan865x/lan865x.c-311-\tif (ret) {\n--\ndrivers/net/ethernet/microchip/lan865x/lan865x.c-322-\ndrivers/net/ethernet/microchip/lan865x/lan865x.c:323:static const struct net_device_ops lan865x_netdev_ops = {\ndrivers/net/ethernet/microchip/lan865x/lan865x.c:324:\t.ndo_open\t\t= lan865x_net_open,\ndrivers/net/ethernet/microchip/lan865x/lan865x.c:325:\t.ndo_stop\t\t= lan865x_net_close,\ndrivers/net/ethernet/microchip/lan865x/lan865x.c:326:\t.ndo_start_xmit\t\t= lan865x_send_packet,\ndrivers/net/ethernet/microchip/lan865x/lan865x.c:327:\t.ndo_set_rx_mode\t= lan865x_set_multicast_list,\ndrivers/net/ethernet/microchip/lan865x/lan865x.c:328:\t.ndo_set_mac_address\t= lan865x_set_mac_address,\ndrivers/net/ethernet/microchip/lan865x/lan865x.c-329-\t.ndo_validate_addr\t= eth_validate_addr,\n--\ndrivers/net/ethernet/microchip/lan865x/lan865x.c-332-\ndrivers/net/ethernet/microchip/lan865x/lan865x.c:333:static int lan865x_probe(struct spi_device spi)\ndrivers/net/ethernet/microchip/lan865x/lan865x.c-334-{\n--\ndrivers/net/ethernet/microchip/lan865x/lan865x.c-336-\tstruct net_device netdev;\ndrivers/net/ethernet/microchip/lan865x/lan865x.c:337:\tstruct lan865x_priv priv;\ndrivers/net/ethernet/microchip/lan865x/lan865x.c-338-\tint ret;\ndrivers/net/ethernet/microchip/lan865x/lan865x.c-339-\ndrivers/net/ethernet/microchip/lan865x/lan865x.c:340:\tnetdev = alloc_etherdev(sizeof(struct lan865x_priv));\ndrivers/net/ethernet/microchip/lan865x/lan865x.c-341-\tif (!netdev)\n--\ndrivers/net/ethernet/microchip/lan865x/lan865x.c-347-\tspi_set_drvdata(spi, priv);\ndrivers/net/ethernet/microchip/lan865x/lan865x.c:348:\tINIT_WORK(\u0026priv-\u003emulticast_work, lan865x_multicast_work_handler);\ndrivers/net/ethernet/microchip/lan865x/lan865x.c-349-\n--\ndrivers/net/ethernet/microchip/lan865x/lan865x.c-393-\ndrivers/net/ethernet/microchip/lan865x/lan865x.c:394:\tret = lan865x_set_hw_macaddr(priv, netdev-\u003edev_addr);\ndrivers/net/ethernet/microchip/lan865x/lan865x.c-395-\tif (ret) {\n--\ndrivers/net/ethernet/microchip/lan865x/lan865x.c-401-\tnetdev-\u003eirq = spi-\u003eirq;\ndrivers/net/ethernet/microchip/lan865x/lan865x.c:402:\tnetdev-\u003enetdev_ops = \u0026lan865x_netdev_ops;\ndrivers/net/ethernet/microchip/lan865x/lan865x.c:403:\tnetdev-\u003eethtool_ops = \u0026lan865x_ethtool_ops;\ndrivers/net/ethernet/microchip/lan865x/lan865x.c-404-\n--\ndrivers/net/ethernet/microchip/lan865x/lan865x.c-419-\ndrivers/net/ethernet/microchip/lan865x/lan865x.c:420:static void lan865x_remove(struct spi_device spi)\ndrivers/net/ethernet/microchip/lan865x/lan865x.c-421-{\ndrivers/net/ethernet/microchip/lan865x/lan865x.c:422:\tstruct lan865x_priv priv = spi_get_drvdata(spi);\ndrivers/net/ethernet/microchip/lan865x/lan865x.c-423-\n--\ndrivers/net/ethernet/microchip/lan865x/lan865x.c-429-\ndrivers/net/ethernet/microchip/lan865x/lan865x.c:430:static const struct spi_device_id lan865x_ids[] = {\ndrivers/net/ethernet/microchip/lan865x/lan865x.c-431-\t{ .name = \"lan8650\" },\n--\ndrivers/net/ethernet/microchip/lan865x/lan865x.c-434-};\ndrivers/net/ethernet/microchip/lan865x/lan865x.c:435:MODULE_DEVICE_TABLE(spi, lan865x_ids);\ndrivers/net/ethernet/microchip/lan865x/lan865x.c-436-\ndrivers/net/ethernet/microchip/lan865x/lan865x.c:437:static const struct of_device_id lan865x_dt_ids[] = {\ndrivers/net/ethernet/microchip/lan865x/lan865x.c-438-\t{ .compatible = \"microchip,lan8650\" },\n--\ndrivers/net/ethernet/microchip/lan865x/lan865x.c-441-};\ndrivers/net/ethernet/microchip/lan865x/lan865x.c:442:MODULE_DEVICE_TABLE(of, lan865x_dt_ids);\ndrivers/net/ethernet/microchip/lan865x/lan865x.c-443-\ndrivers/net/ethernet/microchip/lan865x/lan865x.c:444:static struct spi_driver lan865x_driver = {\ndrivers/net/ethernet/microchip/lan865x/lan865x.c-445-\t.driver = {\ndrivers/net/ethernet/microchip/lan865x/lan865x.c-446-\t\t.name = DRV_NAME,\ndrivers/net/ethernet/microchip/lan865x/lan865x.c:447:\t\t.of_match_table = lan865x_dt_ids,\ndrivers/net/ethernet/microchip/lan865x/lan865x.c-448-\t },\ndrivers/net/ethernet/microchip/lan865x/lan865x.c:449:\t.probe = lan865x_probe,\ndrivers/net/ethernet/microchip/lan865x/lan865x.c:450:\t.remove = lan865x_remove,\ndrivers/net/ethernet/microchip/lan865x/lan865x.c:451:\t.id_table = lan865x_ids,\ndrivers/net/ethernet/microchip/lan865x/lan865x.c-452-};\ndrivers/net/ethernet/microchip/lan865x/lan865x.c:453:module_spi_driver(lan865x_driver);\ndrivers/net/ethernet/microchip/lan865x/lan865x.c-454-\n--\ndrivers/net/phy/microchip_t1s.c=89=static const u16 lan867x_revb1_fixup_masks[12] = {\n--\ndrivers/net/phy/microchip_t1s.c-99- /\ndrivers/net/phy/microchip_t1s.c:100:static const u32 lan865x_revb_fixup_registers[17] = {\ndrivers/net/phy/microchip_t1s.c-101-\t0x00D0, 0x00E0, 0x00E9, 0x00F5,\n--\ndrivers/net/phy/microchip_t1s.c-107-\ndrivers/net/phy/microchip_t1s.c:108:static const u16 lan865x_revb_fixup_values[17] = {\ndrivers/net/phy/microchip_t1s.c-109-\t0x3F31, 0xC000, 0x9E50, 0x1CF8,\n--\ndrivers/net/phy/microchip_t1s.c-115-\ndrivers/net/phy/microchip_t1s.c:116:static const u16 lan865x_revb_fixup_cfg_regs[2] = {\ndrivers/net/phy/microchip_t1s.c-117-\t0x0084, 0x008A,\n--\ndrivers/net/phy/microchip_t1s.c-119-\ndrivers/net/phy/microchip_t1s.c:120:static const u32 lan865x_revb_sqi_fixup_regs[12] = {\ndrivers/net/phy/microchip_t1s.c-121-\t0x00B0, 0x00B1, 0x00B2, 0x00B3,\n--\ndrivers/net/phy/microchip_t1s.c-125-\ndrivers/net/phy/microchip_t1s.c:126:static const u16 lan865x_revb_sqi_fixup_values[12] = {\ndrivers/net/phy/microchip_t1s.c-127-\t0x0103, 0x0910, 0x1D26, 0x002A,\n--\ndrivers/net/phy/microchip_t1s.c-131-\ndrivers/net/phy/microchip_t1s.c:132:static const u16 lan865x_revb_sqi_fixup_cfg_regs[3] = {\ndrivers/net/phy/microchip_t1s.c-133-\t0x00AD, 0x00AE, 0x00AF,\n--\ndrivers/net/phy/microchip_t1s.c=146=static const u16 lan867x_revd0_fixup_values[8] = {\n--\ndrivers/net/phy/microchip_t1s.c-158- /\ndrivers/net/phy/microchip_t1s.c:159:static int lan865x_revb_indirect_read(struct phy_device phydev, u16 addr)\ndrivers/net/phy/microchip_t1s.c-160-{\n--\ndrivers/net/phy/microchip_t1s.c-178- /\ndrivers/net/phy/microchip_t1s.c:179:static int lan865x_generate_cfg_offsets(struct phy_device phydev, s8 offsets[])\ndrivers/net/phy/microchip_t1s.c-180-{\n--\ndrivers/net/phy/microchip_t1s.c-184-\tfor (int i = 0; i \u003c ARRAY_SIZE(fixup_regs); i++) {\ndrivers/net/phy/microchip_t1s.c:185:\t\tret = lan865x_revb_indirect_read(phydev, fixup_regs[i]);\ndrivers/net/phy/microchip_t1s.c-186-\t\tif (ret \u003c 0)\n--\ndrivers/net/phy/microchip_t1s.c-199-\ndrivers/net/phy/microchip_t1s.c:200:static int lan865x_read_cfg_params(struct phy_device phydev,\ndrivers/net/phy/microchip_t1s.c-201-\t\t\t\t const u16 cfg_regs[], u16 cfg_params[],\n--\ndrivers/net/phy/microchip_t1s.c-216-\ndrivers/net/phy/microchip_t1s.c:217:static int lan865x_write_cfg_params(struct phy_device phydev,\ndrivers/net/phy/microchip_t1s.c-218-\t\t\t\t const u16 cfg_regs[], u16 cfg_params[],\n--\ndrivers/net/phy/microchip_t1s.c-232-\ndrivers/net/phy/microchip_t1s.c:233:static int lan865x_setup_cfgparam(struct phy_device phydev, s8 offsets[])\ndrivers/net/phy/microchip_t1s.c-234-{\ndrivers/net/phy/microchip_t1s.c:235:\tu16 cfg_results[ARRAY_SIZE(lan865x_revb_fixup_cfg_regs)];\ndrivers/net/phy/microchip_t1s.c:236:\tu16 cfg_params[ARRAY_SIZE(lan865x_revb_fixup_cfg_regs)];\ndrivers/net/phy/microchip_t1s.c-237-\tint ret;\ndrivers/net/phy/microchip_t1s.c-238-\ndrivers/net/phy/microchip_t1s.c:239:\tret = lan865x_read_cfg_params(phydev, lan865x_revb_fixup_cfg_regs,\ndrivers/net/phy/microchip_t1s.c-240-\t\t\t\t cfg_params, ARRAY_SIZE(cfg_params));\n--\ndrivers/net/phy/microchip_t1s.c-248-\ndrivers/net/phy/microchip_t1s.c:249:\treturn lan865x_write_cfg_params(phydev, lan865x_revb_fixup_cfg_regs,\ndrivers/net/phy/microchip_t1s.c-250-\t\t\t\t\tcfg_results, ARRAY_SIZE(cfg_results));\n--\ndrivers/net/phy/microchip_t1s.c-252-\ndrivers/net/phy/microchip_t1s.c:253:static int lan865x_setup_sqi_cfgparam(struct phy_device phydev, s8 offsets[])\ndrivers/net/phy/microchip_t1s.c-254-{\ndrivers/net/phy/microchip_t1s.c:255:\tu16 cfg_results[ARRAY_SIZE(lan865x_revb_sqi_fixup_cfg_regs)];\ndrivers/net/phy/microchip_t1s.c:256:\tu16 cfg_params[ARRAY_SIZE(lan865x_revb_sqi_fixup_cfg_regs)];\ndrivers/net/phy/microchip_t1s.c-257-\tint ret;\ndrivers/net/phy/microchip_t1s.c-258-\ndrivers/net/phy/microchip_t1s.c:259:\tret = lan865x_read_cfg_params(phydev, lan865x_revb_sqi_fixup_cfg_regs,\ndrivers/net/phy/microchip_t1s.c-260-\t\t\t\t cfg_params, ARRAY_SIZE(cfg_params));\n--\ndrivers/net/phy/microchip_t1s.c-270-\ndrivers/net/phy/microchip_t1s.c:271:\treturn lan865x_write_cfg_params(phydev, lan865x_revb_sqi_fixup_cfg_regs,\ndrivers/net/phy/microchip_t1s.c-272-\t\t\t\t\tcfg_results, ARRAY_SIZE(cfg_results));\n--\ndrivers/net/phy/microchip_t1s.c-274-\ndrivers/net/phy/microchip_t1s.c:275:static int lan865x_revb_config_init(struct phy_device phydev)\ndrivers/net/phy/microchip_t1s.c-276-{\n--\ndrivers/net/phy/microchip_t1s.c-282-\t /\ndrivers/net/phy/microchip_t1s.c:283:\tret = lan865x_generate_cfg_offsets(phydev, offsets);\ndrivers/net/phy/microchip_t1s.c-284-\tif (ret)\n--\ndrivers/net/phy/microchip_t1s.c-286-\ndrivers/net/phy/microchip_t1s.c:287:\tfor (int i = 0; i \u003c ARRAY_SIZE(lan865x_revb_fixup_registers); i++) {\ndrivers/net/phy/microchip_t1s.c-288-\t\tret = phy_write_mmd(phydev, MDIO_MMD_VEND2,\ndrivers/net/phy/microchip_t1s.c:289:\t\t\t\t lan865x_revb_fixup_registers[i],\ndrivers/net/phy/microchip_t1s.c:290:\t\t\t\t lan865x_revb_fixup_values[i]);\ndrivers/net/phy/microchip_t1s.c-291-\t\tif (ret)\n--\ndrivers/net/phy/microchip_t1s.c-294-\t\tif (i == 1) {\ndrivers/net/phy/microchip_t1s.c:295:\t\t\tret = lan865x_setup_cfgparam(phydev, offsets);\ndrivers/net/phy/microchip_t1s.c-296-\t\t\tif (ret)\n--\ndrivers/net/phy/microchip_t1s.c-300-\ndrivers/net/phy/microchip_t1s.c:301:\tret = lan865x_setup_sqi_cfgparam(phydev, offsets);\ndrivers/net/phy/microchip_t1s.c-302-\tif (ret)\n--\ndrivers/net/phy/microchip_t1s.c-304-\ndrivers/net/phy/microchip_t1s.c:305:\tfor (int i = 0; i \u003c ARRAY_SIZE(lan865x_revb_sqi_fixup_regs); i++) {\ndrivers/net/phy/microchip_t1s.c-306-\t\tret = phy_write_mmd(phydev, MDIO_MMD_VEND2,\ndrivers/net/phy/microchip_t1s.c:307:\t\t\t\t lan865x_revb_sqi_fixup_regs[i],\ndrivers/net/phy/microchip_t1s.c:308:\t\t\t\t lan865x_revb_sqi_fixup_values[i]);\ndrivers/net/phy/microchip_t1s.c-309-\t\tif (ret)\n--\ndrivers/net/phy/microchip_t1s.c=341=static int lan867x_revc_config_init(struct phy_device *phydev)\n--\ndrivers/net/phy/microchip_t1s.c-349-\ndrivers/net/phy/microchip_t1s.c:350:\tret = lan865x_generate_cfg_offsets(phydev, offsets);\ndrivers/net/phy/microchip_t1s.c-351-\tif (ret)\n--\ndrivers/net/phy/microchip_t1s.c-365-\t\tret = phy_write_mmd(phydev, MDIO_MMD_VEND2,\ndrivers/net/phy/microchip_t1s.c:366:\t\t\t\t lan865x_revb_fixup_registers[i],\ndrivers/net/phy/microchip_t1s.c:367:\t\t\t\t lan865x_revb_fixup_values[i]);\ndrivers/net/phy/microchip_t1s.c-368-\t\tif (ret)\n--\ndrivers/net/phy/microchip_t1s.c-371-\t\tif (i == 1) {\ndrivers/net/phy/microchip_t1s.c:372:\t\t\tret = lan865x_setup_cfgparam(phydev, offsets);\ndrivers/net/phy/microchip_t1s.c-373-\t\t\tif (ret)\n--\ndrivers/net/phy/microchip_t1s.c-377-\ndrivers/net/phy/microchip_t1s.c:378:\tret = lan865x_setup_sqi_cfgparam(phydev, offsets);\ndrivers/net/phy/microchip_t1s.c-379-\tif (ret)\n--\ndrivers/net/phy/microchip_t1s.c-381-\ndrivers/net/phy/microchip_t1s.c:382:\tfor (int i = 0; i \u003c ARRAY_SIZE(lan865x_revb_sqi_fixup_regs); i++) {\ndrivers/net/phy/microchip_t1s.c-383-\t\tret = phy_write_mmd(phydev, MDIO_MMD_VEND2,\ndrivers/net/phy/microchip_t1s.c:384:\t\t\t\t lan865x_revb_sqi_fixup_regs[i],\ndrivers/net/phy/microchip_t1s.c:385:\t\t\t\t lan865x_revb_sqi_fixup_values[i]);\ndrivers/net/phy/microchip_t1s.c-386-\t\tif (ret)\n--\ndrivers/net/phy/microchip_t1s.c=658=static struct phy_driver microchip_t1s_driver[] = {\n--\ndrivers/net/phy/microchip_t1s.c-713-\t\t.features = PHY_BASIC_T1S_P2MP_FEATURES,\ndrivers/net/phy/microchip_t1s.c:714:\t\t.config_init = lan865x_revb_config_init,\ndrivers/net/phy/microchip_t1s.c-715-\t\t.read_status = lan86xx_read_status,\n" }
5/2	2026/09/07 08:22	llm	patch-evaluator	0m Model: gemini-3.7-flash Args: null Results: null Tokens: input: 19839 output: 27 thoughts: 39 Thoughts: Okay, here's my take on those thoughts, framed as my own mental process, given my expertise: Checking the OA_TC6 Implementation and Configuration Right, let's dive into `oa_tc6.c` and its associated Kconfig file. I need to understand the configuration options related to OA_TC6. Specifically, I need to pinpoint the Kconfig entries that control whether this functionality is included in the build. I'm looking for the definitions related to `OA_TC6` itself, of course, but I should also see how the `MICROCHIP_T1S` driver interacts with it, if at all. It's important to understand the dependencies and relationships, and whether these features are mutually exclusive, or have specific conditions attached. I'm mentally parsing the Kconfig entries to quickly grasp the build configuration options. This will help me quickly understand how to enable or disable the relevant code during the build process.
6/2	2026/09/07 08:22	tool	grepper	0m Args: { "Expression": "OA_TC6", "PathPrefix": "drivers/net" } Results: { "Output": "\nFull output is too long, showing 500 out of 612 lines.\nUse more precise expression if possible.\n\ndrivers/net/ethernet/Kconfig=139=config ETHOC\n--\ndrivers/net/ethernet/Kconfig-148-\ndrivers/net/ethernet/Kconfig:149:config OA_TC6\ndrivers/net/ethernet/Kconfig-150-\ttristate \"OPEN Alliance TC6 10BASE-T1x MAC-PHY support\" if COMPILE_TEST\n--\ndrivers/net/ethernet/Makefile=106=obj-$(CONFIG_NET_VENDOR_PENSANDO) += pensando/\ndrivers/net/ethernet/Makefile:107:obj-$(CONFIG_OA_TC6) += oa_tc6.o\ndrivers/net/ethernet/Makefile-108-obj-$(CONFIG_NET_VENDOR_ZTE) += zte/\n--\ndrivers/net/ethernet/adi/Kconfig=29=config ADIN1140\n--\ndrivers/net/ethernet/adi/Kconfig-32-\tselect ADIN1140_PHY\ndrivers/net/ethernet/adi/Kconfig:33:\tselect OA_TC6\ndrivers/net/ethernet/adi/Kconfig-34-\thelp\n--\ndrivers/net/ethernet/adi/adin1140.c=143=static int adin1140_mac_filter_set(struct adin1140_priv priv,\n--\ndrivers/net/ethernet/adi/adin1140.c-155-\ndrivers/net/ethernet/adi/adin1140.c:156:\tret = oa_tc6_write_register_mms(priv-\u003etc6, OA_TC6_MAC_MMS1,\ndrivers/net/ethernet/adi/adin1140.c-157-\t\t\t\t\treg_address,\n--\ndrivers/net/ethernet/adi/adin1140.c-164-\treg_address = ADIN1140_MAC_ADDR_FILT_LWR_REG + 2 slot;\ndrivers/net/ethernet/adi/adin1140.c:165:\tret = oa_tc6_write_register_mms(priv-\u003etc6, OA_TC6_MAC_MMS1,\ndrivers/net/ethernet/adi/adin1140.c-166-\t\t\t\t\treg_address,\n--\ndrivers/net/ethernet/adi/adin1140.c-180-\ndrivers/net/ethernet/adi/adin1140.c:181:\tret = oa_tc6_write_register_mms(priv-\u003etc6, OA_TC6_MAC_MMS1,\ndrivers/net/ethernet/adi/adin1140.c-182-\t\t\t\t\treg_address, val);\n--\ndrivers/net/ethernet/adi/adin1140.c-188-\ndrivers/net/ethernet/adi/adin1140.c:189:\treturn oa_tc6_write_register_mms(priv-\u003etc6, OA_TC6_MAC_MMS1,\ndrivers/net/ethernet/adi/adin1140.c-190-\t\t\t\t\t reg_address, val);\n--\ndrivers/net/ethernet/adi/adin1140.c=250=static int adin1140_promiscuous_mode(struct adin1140_priv priv, bool enabled)\n--\ndrivers/net/ethernet/adi/adin1140.c-254-\ndrivers/net/ethernet/adi/adin1140.c:255:\tret = oa_tc6_read_register(priv-\u003etc6, OA_TC6_REG_CONFIG2, \u0026val);\ndrivers/net/ethernet/adi/adin1140.c-256-\tif (ret)\n--\ndrivers/net/ethernet/adi/adin1140.c-263-\ndrivers/net/ethernet/adi/adin1140.c:264:\treturn oa_tc6_write_register(priv-\u003etc6, OA_TC6_REG_CONFIG2, val);\ndrivers/net/ethernet/adi/adin1140.c-265-}\n--\ndrivers/net/ethernet/adi/adin1140.c=341=static void adin1140_stats_work(struct work_struct work)\n--\ndrivers/net/ethernet/adi/adin1140.c-351-\tfor (i = 0; i \u003c ARRAY_SIZE(adin1140_stat_regs); i++) {\ndrivers/net/ethernet/adi/adin1140.c:352:\t\tret = oa_tc6_read_register_mms(priv-\u003etc6, OA_TC6_MAC_MMS1,\ndrivers/net/ethernet/adi/adin1140.c-353-\t\t\t\t\t adin1140_stat_regs[i],\n--\ndrivers/net/ethernet/adi/adin1140.c=366=static int adin1140_configure(struct adin1140_priv priv)\n--\ndrivers/net/ethernet/adi/adin1140.c-375-\t/ Disable MAC loopback /\ndrivers/net/ethernet/adi/adin1140.c:376:\tret = oa_tc6_write_register_mms(priv-\u003etc6, OA_TC6_MAC_MMS1,\ndrivers/net/ethernet/adi/adin1140.c-377-\t\t\t\t\tADIN1140_MAC_P1_LOOP_ADDR_REG, 0x0);\n--\ndrivers/net/ethernet/adi/adin1140.c-380-\ndrivers/net/ethernet/adi/adin1140.c:381:\tret = oa_tc6_read_register(priv-\u003etc6, OA_TC6_REG_CONFIG2, \u0026reg_val);\ndrivers/net/ethernet/adi/adin1140.c-382-\tif (ret)\n--\ndrivers/net/ethernet/adi/adin1140.c-386-\ndrivers/net/ethernet/adi/adin1140.c:387:\tret = oa_tc6_write_register(priv-\u003etc6, OA_TC6_REG_CONFIG2, reg_val);\ndrivers/net/ethernet/adi/adin1140.c-388-\tif (ret)\n--\ndrivers/net/ethernet/adi/adin1140.c=709=static int adin1140_probe(struct spi_device spi)\n--\ndrivers/net/ethernet/adi/adin1140.c-724-\ndrivers/net/ethernet/adi/adin1140.c:725:\ttc6_quirks.quirk_flags = OA_TC6_BROKEN_PHY;\ndrivers/net/ethernet/adi/adin1140.c-726-\n--\ndrivers/net/ethernet/microchip/lan865x/Kconfig=8=config LAN865X\n--\ndrivers/net/ethernet/microchip/lan865x/Kconfig-10-\tdepends on SPI\ndrivers/net/ethernet/microchip/lan865x/Kconfig:11:\tselect OA_TC6\ndrivers/net/ethernet/microchip/lan865x/Kconfig-12-\thelp\n--\ndrivers/net/ethernet/microchip/lan865x/lan865x.c=333=static int lan865x_probe(struct spi_device spi)\n--\ndrivers/net/ethernet/microchip/lan865x/lan865x.c-349-\ndrivers/net/ethernet/microchip/lan865x/lan865x.c:350:\ttc6_quirks.quirk_flags = OA_TC6_PHY_INT;\ndrivers/net/ethernet/microchip/lan865x/lan865x.c-351-\tpriv-\u003etc6 = oa_tc6_init(spi, netdev, \u0026tc6_quirks);\n--\ndrivers/net/ethernet/oa_tc6.c-17-/ Control command header /\ndrivers/net/ethernet/oa_tc6.c:18:#define OA_TC6_CTRL_HEADER_DATA_NOT_CTRL\tBIT(31)\ndrivers/net/ethernet/oa_tc6.c:19:#define OA_TC6_CTRL_HEADER_WRITE_NOT_READ\tBIT(29)\ndrivers/net/ethernet/oa_tc6.c:20:#define OA_TC6_CTRL_HEADER_MEM_MAP_SELECTOR\tGENMASK(27, 24)\ndrivers/net/ethernet/oa_tc6.c:21:#define OA_TC6_CTRL_HEADER_ADDR\t\t\tGENMASK(23, 8)\ndrivers/net/ethernet/oa_tc6.c:22:#define OA_TC6_CTRL_HEADER_LENGTH\t\tGENMASK(7, 1)\ndrivers/net/ethernet/oa_tc6.c:23:#define OA_TC6_CTRL_HEADER_PARITY\t\tBIT(0)\ndrivers/net/ethernet/oa_tc6.c-24-\ndrivers/net/ethernet/oa_tc6.c-25-/ Data header /\ndrivers/net/ethernet/oa_tc6.c:26:#define OA_TC6_DATA_HEADER_DATA_NOT_CTRL\tBIT(31)\ndrivers/net/ethernet/oa_tc6.c:27:#define OA_TC6_DATA_HEADER_DATA_VALID\t\tBIT(21)\ndrivers/net/ethernet/oa_tc6.c:28:#define OA_TC6_DATA_HEADER_START_VALID\t\tBIT(20)\ndrivers/net/ethernet/oa_tc6.c:29:#define OA_TC6_DATA_HEADER_START_WORD_OFFSET\tGENMASK(19, 16)\ndrivers/net/ethernet/oa_tc6.c:30:#define OA_TC6_DATA_HEADER_END_VALID\t\tBIT(14)\ndrivers/net/ethernet/oa_tc6.c:31:#define OA_TC6_DATA_HEADER_END_BYTE_OFFSET\tGENMASK(13, 8)\ndrivers/net/ethernet/oa_tc6.c:32:#define OA_TC6_DATA_HEADER_PARITY\t\tBIT(0)\ndrivers/net/ethernet/oa_tc6.c-33-\ndrivers/net/ethernet/oa_tc6.c-34-/ Data footer /\ndrivers/net/ethernet/oa_tc6.c:35:#define OA_TC6_DATA_FOOTER_EXTENDED_STS\t\tBIT(31)\ndrivers/net/ethernet/oa_tc6.c:36:#define OA_TC6_DATA_FOOTER_RXD_HEADER_BAD\tBIT(30)\ndrivers/net/ethernet/oa_tc6.c:37:#define OA_TC6_DATA_FOOTER_CONFIG_SYNC\t\tBIT(29)\ndrivers/net/ethernet/oa_tc6.c:38:#define OA_TC6_DATA_FOOTER_RX_CHUNKS\t\tGENMASK(28, 24)\ndrivers/net/ethernet/oa_tc6.c:39:#define OA_TC6_DATA_FOOTER_DATA_VALID\t\tBIT(21)\ndrivers/net/ethernet/oa_tc6.c:40:#define OA_TC6_DATA_FOOTER_START_VALID\t\tBIT(20)\ndrivers/net/ethernet/oa_tc6.c:41:#define OA_TC6_DATA_FOOTER_START_WORD_OFFSET\tGENMASK(19, 16)\ndrivers/net/ethernet/oa_tc6.c:42:#define OA_TC6_DATA_FOOTER_END_VALID\t\tBIT(14)\ndrivers/net/ethernet/oa_tc6.c:43:#define OA_TC6_DATA_FOOTER_END_BYTE_OFFSET\tGENMASK(13, 8)\ndrivers/net/ethernet/oa_tc6.c:44:#define OA_TC6_DATA_FOOTER_TX_CREDITS\t\tGENMASK(5, 1)\ndrivers/net/ethernet/oa_tc6.c-45-\ndrivers/net/ethernet/oa_tc6.c:46:#define OA_TC6_CTRL_PROT_REPLY_SIZE\t\t4\ndrivers/net/ethernet/oa_tc6.c:47:#define OA_TC6_CTRL_HEADER_SIZE\t\t\t4\ndrivers/net/ethernet/oa_tc6.c:48:#define OA_TC6_CTRL_REG_VALUE_SIZE\t\t4\ndrivers/net/ethernet/oa_tc6.c:49:#define OA_TC6_CTRL_IGNORED_SIZE\t\t4\ndrivers/net/ethernet/oa_tc6.c:50:#define OA_TC6_CTRL_MAX_REGISTERS\t\t128\ndrivers/net/ethernet/oa_tc6.c:51:#define OA_TC6_CTRL_SPI_BUF_SIZE\t(OA_TC6_CTRL_HEADER_SIZE +\\\ndrivers/net/ethernet/oa_tc6.c:52:\t\t\t\t\t(OA_TC6_CTRL_MAX_REGISTERS \\\ndrivers/net/ethernet/oa_tc6.c:53:\t\t\t\t\t(OA_TC6_CTRL_REG_VALUE_SIZE +\\\ndrivers/net/ethernet/oa_tc6.c:54:\t\t\t\t\tOA_TC6_CTRL_PROT_REPLY_SIZE)) +\\\ndrivers/net/ethernet/oa_tc6.c:55:\t\t\t\t\tOA_TC6_CTRL_IGNORED_SIZE)\ndrivers/net/ethernet/oa_tc6.c-56-\ndrivers/net/ethernet/oa_tc6.c:57:#define OA_TC6_CHUNK_PAYLOAD_SIZE\t\t64\ndrivers/net/ethernet/oa_tc6.c:58:#define OA_TC6_DATA_HEADER_SIZE\t\t\t4\ndrivers/net/ethernet/oa_tc6.c:59:#define OA_TC6_CHUNK_SIZE\t\t\t(OA_TC6_DATA_HEADER_SIZE +\\\ndrivers/net/ethernet/oa_tc6.c:60:\t\t\t\t\t\tOA_TC6_CHUNK_PAYLOAD_SIZE)\ndrivers/net/ethernet/oa_tc6.c:61:#define OA_TC6_MAX_TX_CHUNKS\t\t\t48\ndrivers/net/ethernet/oa_tc6.c:62:#define OA_TC6_SPI_DATA_BUF_SIZE\t\t(OA_TC6_MAX_TX_CHUNKS \\\ndrivers/net/ethernet/oa_tc6.c:63:\t\t\t\t\t\tOA_TC6_CHUNK_SIZE)\ndrivers/net/ethernet/oa_tc6.c-64-#define STATUS0_RESETC_POLL_DELAY\t\t1000\n--\ndrivers/net/ethernet/oa_tc6.c-66-\ndrivers/net/ethernet/oa_tc6.c:67:#define OA_TC6_REG_MMS_MASK\t\tGENMASK(19, 16)\ndrivers/net/ethernet/oa_tc6.c-68-\n--\ndrivers/net/ethernet/oa_tc6.c=97=enum oa_tc6_header_type {\ndrivers/net/ethernet/oa_tc6.c:98:\tOA_TC6_CTRL_HEADER,\ndrivers/net/ethernet/oa_tc6.c:99:\tOA_TC6_DATA_HEADER,\ndrivers/net/ethernet/oa_tc6.c-100-};\n--\ndrivers/net/ethernet/oa_tc6.c=102=enum oa_tc6_register_op {\ndrivers/net/ethernet/oa_tc6.c:103:\tOA_TC6_CTRL_REG_READ = 0,\ndrivers/net/ethernet/oa_tc6.c:104:\tOA_TC6_CTRL_REG_WRITE = 1,\ndrivers/net/ethernet/oa_tc6.c-105-};\n--\ndrivers/net/ethernet/oa_tc6.c=107=enum oa_tc6_data_valid_info {\ndrivers/net/ethernet/oa_tc6.c:108:\tOA_TC6_DATA_INVALID,\ndrivers/net/ethernet/oa_tc6.c:109:\tOA_TC6_DATA_VALID,\ndrivers/net/ethernet/oa_tc6.c-110-};\n--\ndrivers/net/ethernet/oa_tc6.c=112=enum oa_tc6_data_start_valid_info {\ndrivers/net/ethernet/oa_tc6.c:113:\tOA_TC6_DATA_START_INVALID,\ndrivers/net/ethernet/oa_tc6.c:114:\tOA_TC6_DATA_START_VALID,\ndrivers/net/ethernet/oa_tc6.c-115-};\n--\ndrivers/net/ethernet/oa_tc6.c=117=enum oa_tc6_data_end_valid_info {\ndrivers/net/ethernet/oa_tc6.c:118:\tOA_TC6_DATA_END_INVALID,\ndrivers/net/ethernet/oa_tc6.c:119:\tOA_TC6_DATA_END_VALID,\ndrivers/net/ethernet/oa_tc6.c-120-};\n--\ndrivers/net/ethernet/oa_tc6.c=122=static int oa_tc6_spi_transfer(struct oa_tc6 tc6,\n--\ndrivers/net/ethernet/oa_tc6.c-127-\ndrivers/net/ethernet/oa_tc6.c:128:\tif (header_type == OA_TC6_DATA_HEADER) {\ndrivers/net/ethernet/oa_tc6.c-129-\t\txfer.tx_buf = tc6-\u003espi_data_tx_buf;\n--\ndrivers/net/ethernet/oa_tc6.c=156=static __be32 oa_tc6_prepare_ctrl_header(u32 addr, u8 length,\n--\ndrivers/net/ethernet/oa_tc6.c-160-\ndrivers/net/ethernet/oa_tc6.c:161:\theader = FIELD_PREP(OA_TC6_CTRL_HEADER_DATA_NOT_CTRL,\ndrivers/net/ethernet/oa_tc6.c:162:\t\t\t OA_TC6_CTRL_HEADER) \|\ndrivers/net/ethernet/oa_tc6.c:163:\t\t FIELD_PREP(OA_TC6_CTRL_HEADER_WRITE_NOT_READ, reg_op) \|\ndrivers/net/ethernet/oa_tc6.c:164:\t\t FIELD_PREP(OA_TC6_CTRL_HEADER_MEM_MAP_SELECTOR, addr \u003e\u003e 16) \|\ndrivers/net/ethernet/oa_tc6.c:165:\t\t FIELD_PREP(OA_TC6_CTRL_HEADER_ADDR, addr) \|\ndrivers/net/ethernet/oa_tc6.c:166:\t\t FIELD_PREP(OA_TC6_CTRL_HEADER_LENGTH, length - 1);\ndrivers/net/ethernet/oa_tc6.c:167:\theader \|= FIELD_PREP(OA_TC6_CTRL_HEADER_PARITY,\ndrivers/net/ethernet/oa_tc6.c-168-\t\t\t oa_tc6_get_parity(header));\n--\ndrivers/net/ethernet/oa_tc6.c=173=static void oa_tc6_update_ctrl_write_data(struct oa_tc6 tc6, u32 value[],\n--\ndrivers/net/ethernet/oa_tc6.c-175-{\ndrivers/net/ethernet/oa_tc6.c:176:\t__be32 tx_buf = tc6-\u003espi_ctrl_tx_buf + OA_TC6_CTRL_HEADER_SIZE;\ndrivers/net/ethernet/oa_tc6.c-177-\n--\ndrivers/net/ethernet/oa_tc6.c=185=static u16 oa_tc6_calculate_ctrl_buf_size(u8 length, bool ctrl_prot)\ndrivers/net/ethernet/oa_tc6.c-186-{\ndrivers/net/ethernet/oa_tc6.c:187:\tu32 reply_size = OA_TC6_CTRL_REG_VALUE_SIZE;\ndrivers/net/ethernet/oa_tc6.c-188-\ndrivers/net/ethernet/oa_tc6.c-189-\tif (ctrl_prot)\ndrivers/net/ethernet/oa_tc6.c:190:\t\treply_size += OA_TC6_CTRL_PROT_REPLY_SIZE;\ndrivers/net/ethernet/oa_tc6.c-191-\n--\ndrivers/net/ethernet/oa_tc6.c-195-\t /\ndrivers/net/ethernet/oa_tc6.c:196:\treturn OA_TC6_CTRL_HEADER_SIZE + reply_size length +\ndrivers/net/ethernet/oa_tc6.c:197:\t OA_TC6_CTRL_IGNORED_SIZE;\ndrivers/net/ethernet/oa_tc6.c-198-}\n--\ndrivers/net/ethernet/oa_tc6.c=200=static void oa_tc6_prepare_ctrl_spi_buf(struct oa_tc6 tc6, u32 address,\n--\ndrivers/net/ethernet/oa_tc6.c-209-\ndrivers/net/ethernet/oa_tc6.c:210:\tif (reg_op == OA_TC6_CTRL_REG_WRITE)\ndrivers/net/ethernet/oa_tc6.c-211-\t\toa_tc6_update_ctrl_write_data(tc6, value, length);\n--\ndrivers/net/ethernet/oa_tc6.c=214=static int oa_tc6_check_ctrl_write_reply(struct oa_tc6 tc6, u8 size)\n--\ndrivers/net/ethernet/oa_tc6.c-218-\ndrivers/net/ethernet/oa_tc6.c:219:\trx_buf += OA_TC6_CTRL_IGNORED_SIZE;\ndrivers/net/ethernet/oa_tc6.c-220-\n--\ndrivers/net/ethernet/oa_tc6.c-223-\t /\ndrivers/net/ethernet/oa_tc6.c:224:\tif (memcmp(tx_buf, rx_buf, size - OA_TC6_CTRL_IGNORED_SIZE))\ndrivers/net/ethernet/oa_tc6.c-225-\t\treturn -EPROTO;\n--\ndrivers/net/ethernet/oa_tc6.c=230=static int oa_tc6_check_ctrl_read_reply(struct oa_tc6 tc6, u8 length)\ndrivers/net/ethernet/oa_tc6.c-231-{\ndrivers/net/ethernet/oa_tc6.c:232:\t__be32 rx_buf = tc6-\u003espi_ctrl_rx_buf + OA_TC6_CTRL_IGNORED_SIZE;\ndrivers/net/ethernet/oa_tc6.c-233-\t__be32 tx_buf = tc6-\u003espi_ctrl_tx_buf;\n--\ndrivers/net/ethernet/oa_tc6.c=260=static void oa_tc6_copy_ctrl_read_data(struct oa_tc6 tc6, u32 value[],\n--\ndrivers/net/ethernet/oa_tc6.c-262-{\ndrivers/net/ethernet/oa_tc6.c:263:\t__be32 rx_buf = tc6-\u003espi_ctrl_rx_buf + OA_TC6_CTRL_IGNORED_SIZE +\ndrivers/net/ethernet/oa_tc6.c:264:\t\t\t OA_TC6_CTRL_HEADER_SIZE;\ndrivers/net/ethernet/oa_tc6.c-265-\n--\ndrivers/net/ethernet/oa_tc6.c=275=static int oa_tc6_perform_ctrl(struct oa_tc6 tc6, u32 address, u32 value[],\n--\ndrivers/net/ethernet/oa_tc6.c-286-\t/ Perform SPI transfer /\ndrivers/net/ethernet/oa_tc6.c:287:\tret = oa_tc6_spi_transfer(tc6, OA_TC6_CTRL_HEADER, size);\ndrivers/net/ethernet/oa_tc6.c-288-\tif (ret) {\n--\ndrivers/net/ethernet/oa_tc6.c-294-\t/ Check echoed/received control write command reply for errors /\ndrivers/net/ethernet/oa_tc6.c:295:\tif (reg_op == OA_TC6_CTRL_REG_WRITE)\ndrivers/net/ethernet/oa_tc6.c-296-\t\treturn oa_tc6_check_ctrl_write_reply(tc6, size);\n--\ndrivers/net/ethernet/oa_tc6.c=319=int oa_tc6_read_registers(struct oa_tc6 tc6, u32 address, u32 value[],\n--\ndrivers/net/ethernet/oa_tc6.c-323-\ndrivers/net/ethernet/oa_tc6.c:324:\tif (!length \|\| length \u003e OA_TC6_CTRL_MAX_REGISTERS) {\ndrivers/net/ethernet/oa_tc6.c-325-\t\tdev_err(\u0026tc6-\u003espi-\u003edev, \"Invalid register length parameter\\n\");\n--\ndrivers/net/ethernet/oa_tc6.c-330-\tret = oa_tc6_perform_ctrl(tc6, address, value, length,\ndrivers/net/ethernet/oa_tc6.c:331:\t\t\t\t OA_TC6_CTRL_REG_READ);\ndrivers/net/ethernet/oa_tc6.c-332-\tmutex_unlock(\u0026tc6-\u003espi_ctrl_lock);\n--\ndrivers/net/ethernet/oa_tc6.c=362=int oa_tc6_read_register_mms(struct oa_tc6 tc6, u8 mms, u16 address,\n--\ndrivers/net/ethernet/oa_tc6.c-366-\ndrivers/net/ethernet/oa_tc6.c:367:\tmms_reg = FIELD_PREP(OA_TC6_REG_MMS_MASK, mms) \| address;\ndrivers/net/ethernet/oa_tc6.c-368-\n--\ndrivers/net/ethernet/oa_tc6.c=384=int oa_tc6_write_registers(struct oa_tc6 tc6, u32 address, u32 value[],\n--\ndrivers/net/ethernet/oa_tc6.c-388-\ndrivers/net/ethernet/oa_tc6.c:389:\tif (!length \|\| length \u003e OA_TC6_CTRL_MAX_REGISTERS) {\ndrivers/net/ethernet/oa_tc6.c-390-\t\tdev_err(\u0026tc6-\u003espi-\u003edev, \"Invalid register length parameter\\n\");\n--\ndrivers/net/ethernet/oa_tc6.c-395-\tret = oa_tc6_perform_ctrl(tc6, address, value, length,\ndrivers/net/ethernet/oa_tc6.c:396:\t\t\t\t OA_TC6_CTRL_REG_WRITE);\ndrivers/net/ethernet/oa_tc6.c-397-\tmutex_unlock(\u0026tc6-\u003espi_ctrl_lock);\n--\ndrivers/net/ethernet/oa_tc6.c=427=int oa_tc6_write_register_mms(struct oa_tc6 tc6, u8 mms, u16 address,\n--\ndrivers/net/ethernet/oa_tc6.c-431-\ndrivers/net/ethernet/oa_tc6.c:432:\tmms_reg = FIELD_PREP(OA_TC6_REG_MMS_MASK, mms) \| address;\ndrivers/net/ethernet/oa_tc6.c-433-\n--\ndrivers/net/ethernet/oa_tc6.c=438=static int oa_tc6_check_phy_reg_direct_access_capability(struct oa_tc6 tc6)\n--\ndrivers/net/ethernet/oa_tc6.c-442-\ndrivers/net/ethernet/oa_tc6.c:443:\tret = oa_tc6_read_register(tc6, OA_TC6_REG_STDCAP, \u0026regval);\ndrivers/net/ethernet/oa_tc6.c-444-\tif (ret)\n--\ndrivers/net/ethernet/oa_tc6.c-446-\ndrivers/net/ethernet/oa_tc6.c:447:\tif (!(regval \u0026 OA_TC6_STDCAP_DIRECT_PHY_REG_ACCESS))\ndrivers/net/ethernet/oa_tc6.c-448-\t\treturn -ENODEV;\n--\ndrivers/net/ethernet/oa_tc6.c=458=static int oa_tc6_mdiobus_read(struct mii_bus bus, int addr, int regnum)\n--\ndrivers/net/ethernet/oa_tc6.c-463-\ndrivers/net/ethernet/oa_tc6.c:464:\tret = oa_tc6_read_register(tc6, OA_TC6_PHY_STD_REG_ADDR_BASE \|\ndrivers/net/ethernet/oa_tc6.c:465:\t\t\t\t (regnum \u0026 OA_TC6_PHY_STD_REG_ADDR_MASK),\ndrivers/net/ethernet/oa_tc6.c-466-\t\t\t\t \u0026regval);\n--\ndrivers/net/ethernet/oa_tc6.c=473=static int oa_tc6_mdiobus_write(struct mii_bus bus, int addr, int regnum,\n--\ndrivers/net/ethernet/oa_tc6.c-477-\ndrivers/net/ethernet/oa_tc6.c:478:\treturn oa_tc6_write_register(tc6, OA_TC6_PHY_STD_REG_ADDR_BASE \|\ndrivers/net/ethernet/oa_tc6.c:479:\t\t\t\t (regnum \u0026 OA_TC6_PHY_STD_REG_ADDR_MASK),\ndrivers/net/ethernet/oa_tc6.c-480-\t\t\t\t val);\n--\ndrivers/net/ethernet/oa_tc6.c=483=static int oa_tc6_get_phy_c45_mms(int devnum)\n--\ndrivers/net/ethernet/oa_tc6.c-486-\tcase MDIO_MMD_PCS:\ndrivers/net/ethernet/oa_tc6.c:487:\t\treturn OA_TC6_PHY_C45_PCS_MMS2;\ndrivers/net/ethernet/oa_tc6.c-488-\tcase MDIO_MMD_PMAPMD:\ndrivers/net/ethernet/oa_tc6.c:489:\t\treturn OA_TC6_PHY_C45_PMA_PMD_MMS3;\ndrivers/net/ethernet/oa_tc6.c-490-\tcase MDIO_MMD_VEND2:\ndrivers/net/ethernet/oa_tc6.c:491:\t\treturn OA_TC6_PHY_C45_VS_PLCA_MMS4;\ndrivers/net/ethernet/oa_tc6.c-492-\tcase MDIO_MMD_AN:\ndrivers/net/ethernet/oa_tc6.c:493:\t\treturn OA_TC6_PHY_C45_AUTO_NEG_MMS5;\ndrivers/net/ethernet/oa_tc6.c-494-\tcase MDIO_MMD_POWER_UNIT:\ndrivers/net/ethernet/oa_tc6.c:495:\t\treturn OA_TC6_PHY_C45_POWER_UNIT_MMS6;\ndrivers/net/ethernet/oa_tc6.c-496-\tdefault:\n--\ndrivers/net/ethernet/oa_tc6.c=573=static int oa_tc6_mdiobus_register(struct oa_tc6 tc6)\n--\ndrivers/net/ethernet/oa_tc6.c-603-\ndrivers/net/ethernet/oa_tc6.c:604:\tif (tc6-\u003equirk_flags \u0026 OA_TC6_PHY_INT) {\ndrivers/net/ethernet/oa_tc6.c-605-\t\tret = oa_tc6_phy_irq_setup(tc6);\n--\ndrivers/net/ethernet/oa_tc6.c-620-\t\tnetdev_err(tc6-\u003enetdev, \"Could not register MDIO bus\\n\");\ndrivers/net/ethernet/oa_tc6.c:621:\t\tif (tc6-\u003equirk_flags \u0026 OA_TC6_PHY_INT)\ndrivers/net/ethernet/oa_tc6.c-622-\t\t\toa_tc6_phy_irq_teardown(tc6);\n--\ndrivers/net/ethernet/oa_tc6.c=630=static void oa_tc6_mdiobus_unregister(struct oa_tc6 tc6)\n--\ndrivers/net/ethernet/oa_tc6.c-632-\tmdiobus_unregister(tc6-\u003emdiobus);\ndrivers/net/ethernet/oa_tc6.c:633:\tif (tc6-\u003equirk_flags \u0026 OA_TC6_PHY_INT)\ndrivers/net/ethernet/oa_tc6.c-634-\t\toa_tc6_phy_irq_teardown(tc6);\n--\ndrivers/net/ethernet/oa_tc6.c=638=static int oa_tc6_phy_init(struct oa_tc6 tc6)\n--\ndrivers/net/ethernet/oa_tc6.c-641-\ndrivers/net/ethernet/oa_tc6.c:642:\tif (tc6-\u003equirk_flags \u0026 OA_TC6_BROKEN_PHY)\ndrivers/net/ethernet/oa_tc6.c-643-\t\treturn 0;\n--\ndrivers/net/ethernet/oa_tc6.c=679=static void oa_tc6_phy_exit(struct oa_tc6 tc6)\ndrivers/net/ethernet/oa_tc6.c-680-{\ndrivers/net/ethernet/oa_tc6.c:681:\tif (tc6-\u003equirk_flags \u0026 OA_TC6_BROKEN_PHY)\ndrivers/net/ethernet/oa_tc6.c-682-\t\treturn;\n--\ndrivers/net/ethernet/oa_tc6.c=688=static int oa_tc6_read_status0(struct oa_tc6 tc6)\n--\ndrivers/net/ethernet/oa_tc6.c-692-\ndrivers/net/ethernet/oa_tc6.c:693:\tret = oa_tc6_read_register(tc6, OA_TC6_REG_STATUS0, \u0026regval);\ndrivers/net/ethernet/oa_tc6.c-694-\tif (ret) {\n--\ndrivers/net/ethernet/oa_tc6.c=703=static int oa_tc6_sw_reset_macphy(struct oa_tc6 tc6)\ndrivers/net/ethernet/oa_tc6.c-704-{\ndrivers/net/ethernet/oa_tc6.c:705:\tu32 regval = OA_TC6_RESET_SWRESET;\ndrivers/net/ethernet/oa_tc6.c-706-\tint ret;\ndrivers/net/ethernet/oa_tc6.c-707-\ndrivers/net/ethernet/oa_tc6.c:708:\tret = oa_tc6_write_register(tc6, OA_TC6_REG_RESET, regval);\ndrivers/net/ethernet/oa_tc6.c-709-\tif (ret)\n--\ndrivers/net/ethernet/oa_tc6.c-713-\tret = readx_poll_timeout(oa_tc6_read_status0, tc6, regval,\ndrivers/net/ethernet/oa_tc6.c:714:\t\t\t\t regval \u0026 OA_TC6_STATUS0_RESETC,\ndrivers/net/ethernet/oa_tc6.c-715-\t\t\t\t STATUS0_RESETC_POLL_DELAY,\n--\ndrivers/net/ethernet/oa_tc6.c-720-\t/* Clear the reset complete status /\ndrivers/net/ethernet/oa_tc6.c:721:\treturn oa_tc6_write_register(tc6, OA_TC6_REG_STATUS0, regval);\ndrivers/net/ethernet/oa_tc6.c-722-}\n--\ndrivers/net/ethernet/oa_tc6.c=724=static int oa_tc6_unmask_interrupts(struct oa_tc6 tc6)\n--\ndrivers/net/ethernet/oa_tc6.c-728-\ndrivers/net/ethernet/oa_tc6.c:729:\tret = oa_tc6_read_register(tc6, OA_TC6_REG_INT_MASK0, \u0026regval);\ndrivers/net/ethernet/oa_tc6.c-730-\tif (ret)\n--\ndrivers/net/ethernet/oa_tc6.c-732-\ndrivers/net/ethernet/oa_tc6.c:733:\tregval \u0026= ~(OA_TC6_INT_MASK0_PHY_INT_MASK \|\ndrivers/net/ethernet/oa_tc6.c:734:\t\t OA_TC6_INT_MASK0_TX_PROTOCOL_ERR_MASK \|\ndrivers/net/ethernet/oa_tc6.c:735:\t\t OA_TC6_INT_MASK0_RX_BUFFER_OVERFLOW_ERR_MASK \|\ndrivers/net/ethernet/oa_tc6.c:736:\t\t OA_TC6_INT_MASK0_LOSS_OF_FRAME_ERR_MASK \|\ndrivers/net/ethernet/oa_tc6.c:737:\t\t OA_TC6_INT_MASK0_HEADER_ERR_MASK);\ndrivers/net/ethernet/oa_tc6.c-738-\ndrivers/net/ethernet/oa_tc6.c:739:\treturn oa_tc6_write_register(tc6, OA_TC6_REG_INT_MASK0, regval);\ndrivers/net/ethernet/oa_tc6.c-740-}\n--\ndrivers/net/ethernet/oa_tc6.c=742=static int oa_tc6_enable_data_transfer(struct oa_tc6 tc6)\n--\ndrivers/net/ethernet/oa_tc6.c-746-\ndrivers/net/ethernet/oa_tc6.c:747:\tret = oa_tc6_read_register(tc6, OA_TC6_REG_CONFIG0, \u0026value);\ndrivers/net/ethernet/oa_tc6.c-748-\tif (ret)\n--\ndrivers/net/ethernet/oa_tc6.c-751-\t/ Enable configuration synchronization for data transfer /\ndrivers/net/ethernet/oa_tc6.c:752:\tvalue \|= OA_TC6_CONFIG0_SYNC;\ndrivers/net/ethernet/oa_tc6.c-753-\ndrivers/net/ethernet/oa_tc6.c:754:\treturn oa_tc6_write_register(tc6, OA_TC6_REG_CONFIG0, value);\ndrivers/net/ethernet/oa_tc6.c-755-}\n--\ndrivers/net/ethernet/oa_tc6.c=825=static void oa_tc6_disable_traffic(struct oa_tc6 tc6)\ndrivers/net/ethernet/oa_tc6.c-826-{\ndrivers/net/ethernet/oa_tc6.c:827:\tu32 regval = OA_TC6_INT_MASK0_ALL_INTERRUPTS;\ndrivers/net/ethernet/oa_tc6.c-828-\tstruct sk_buff skb;\n--\ndrivers/net/ethernet/oa_tc6.c-840-\toa_tc6_free_ongoing_skbs(tc6);\ndrivers/net/ethernet/oa_tc6.c:841:\toa_tc6_write_register(tc6, OA_TC6_REG_INT_MASK0, regval);\ndrivers/net/ethernet/oa_tc6.c:842:\toa_tc6_read_register(tc6, OA_TC6_REG_STATUS0, \u0026regval);\ndrivers/net/ethernet/oa_tc6.c:843:\toa_tc6_write_register(tc6, OA_TC6_REG_STATUS0, regval);\ndrivers/net/ethernet/oa_tc6.c-844-\tdev_err(\u0026tc6-\u003espi-\u003edev, \"Device interrupt disabled to avoid interrupt storm\");\n--\ndrivers/net/ethernet/oa_tc6.c=847=static int oa_tc6_process_extended_status(struct oa_tc6 tc6)\n--\ndrivers/net/ethernet/oa_tc6.c-851-\ndrivers/net/ethernet/oa_tc6.c:852:\tret = oa_tc6_read_register(tc6, OA_TC6_REG_STATUS0, \u0026value);\ndrivers/net/ethernet/oa_tc6.c-853-\tif (ret) {\n--\ndrivers/net/ethernet/oa_tc6.c-866-\t/* Clear the error interrupts status /\ndrivers/net/ethernet/oa_tc6.c:867:\tret = oa_tc6_write_register(tc6, OA_TC6_REG_STATUS0, value);\ndrivers/net/ethernet/oa_tc6.c-868-\tif (ret) {\n--\ndrivers/net/ethernet/oa_tc6.c-878-\t /\ndrivers/net/ethernet/oa_tc6.c:879:\tif ((tc6-\u003equirk_flags \u0026 OA_TC6_PHY_INT) \u0026\u0026\ndrivers/net/ethernet/oa_tc6.c:880:\t FIELD_GET(OA_TC6_STATUS0_PHY_INT, value))\ndrivers/net/ethernet/oa_tc6.c-881-\t\thandle_nested_irq(tc6-\u003ephy_virq);\ndrivers/net/ethernet/oa_tc6.c-882-\ndrivers/net/ethernet/oa_tc6.c:883:\tif (FIELD_GET(OA_TC6_STATUS0_RX_BUFFER_OVERFLOW_ERROR, value)) {\ndrivers/net/ethernet/oa_tc6.c-884-\t\toa_tc6_look_for_new_frame(tc6);\n--\ndrivers/net/ethernet/oa_tc6.c-888-\t}\ndrivers/net/ethernet/oa_tc6.c:889:\tif (FIELD_GET(OA_TC6_STATUS0_TX_PROTOCOL_ERROR, value)) {\ndrivers/net/ethernet/oa_tc6.c-890-\t\tnetdev_err(tc6-\u003enetdev, \"Transmit protocol error\\n\");\n--\ndrivers/net/ethernet/oa_tc6.c-895-\t /\ndrivers/net/ethernet/oa_tc6.c:896:\tif (FIELD_GET(OA_TC6_STATUS0_LOSS_OF_FRAME_ERROR, value)) {\ndrivers/net/ethernet/oa_tc6.c-897-\t\tnetdev_err(tc6-\u003enetdev, \"Loss of frame error\\n\");\n--\ndrivers/net/ethernet/oa_tc6.c-899-\t}\ndrivers/net/ethernet/oa_tc6.c:900:\tif (FIELD_GET(OA_TC6_STATUS0_HEADER_ERROR, value)) {\ndrivers/net/ethernet/oa_tc6.c-901-\t\tnetdev_err(tc6-\u003enetdev, \"Header error\\n\");\n--\ndrivers/net/ethernet/oa_tc6.c=908=static int oa_tc6_process_rx_chunk_footer(struct oa_tc6 tc6, u32 footer)\n--\ndrivers/net/ethernet/oa_tc6.c-916-\t /\ndrivers/net/ethernet/oa_tc6.c:917:\ttc6-\u003etx_credits = FIELD_GET(OA_TC6_DATA_FOOTER_TX_CREDITS, footer);\ndrivers/net/ethernet/oa_tc6.c:918:\ttc6-\u003erx_chunks_available = FIELD_GET(OA_TC6_DATA_FOOTER_RX_CHUNKS,\ndrivers/net/ethernet/oa_tc6.c-919-\t\t\t\t\t footer);\ndrivers/net/ethernet/oa_tc6.c-920-\ndrivers/net/ethernet/oa_tc6.c:921:\tif (FIELD_GET(OA_TC6_DATA_FOOTER_EXTENDED_STS, footer)) {\ndrivers/net/ethernet/oa_tc6.c-922-\t\tret = oa_tc6_process_extended_status(tc6);\n--\ndrivers/net/ethernet/oa_tc6.c-933-\t /\ndrivers/net/ethernet/oa_tc6.c:934:\tif (FIELD_GET(OA_TC6_DATA_FOOTER_RXD_HEADER_BAD, footer)) {\ndrivers/net/ethernet/oa_tc6.c-935-\t\tnetdev_err(tc6-\u003enetdev, \"Rxd header bad error\\n\");\n--\ndrivers/net/ethernet/oa_tc6.c-938-\ndrivers/net/ethernet/oa_tc6.c:939:\tif (!FIELD_GET(OA_TC6_DATA_FOOTER_CONFIG_SYNC, footer)) {\ndrivers/net/ethernet/oa_tc6.c-940-\t\tnetdev_err(tc6-\u003enetdev, \"Config unsync error\\n\");\n--\ndrivers/net/ethernet/oa_tc6.c=1047=static int oa_tc6_prcs_ongoing_rx_frame(struct oa_tc6 tc6, u8 payload,\n--\ndrivers/net/ethernet/oa_tc6.c-1050-\treturn oa_tc6_update_rx_skb(tc6, payload,\ndrivers/net/ethernet/oa_tc6.c:1051:\t\t\t\t OA_TC6_CHUNK_PAYLOAD_SIZE);\ndrivers/net/ethernet/oa_tc6.c-1052-}\n--\ndrivers/net/ethernet/oa_tc6.c=1054=static int oa_tc6_prcs_rx_chunk_payload(struct oa_tc6 tc6, u8 data,\n--\ndrivers/net/ethernet/oa_tc6.c-1056-{\ndrivers/net/ethernet/oa_tc6.c:1057:\tu8 start_byte_offset = FIELD_GET(OA_TC6_DATA_FOOTER_START_WORD_OFFSET,\ndrivers/net/ethernet/oa_tc6.c-1058-\t\t\t\t\t footer) * sizeof(u32);\ndrivers/net/ethernet/oa_tc6.c:1059:\tu8 end_byte_offset = FIELD_GET(OA_TC6_DATA_FOOTER_END_BYTE_OFFSET,\ndrivers/net/ethernet/oa_tc6.c-1060-\t\t\t\t footer);\ndrivers/net/ethernet/oa_tc6.c:1061:\tbool start_valid = FIELD_GET(OA_TC6_DATA_FOOTER_START_VALID, footer);\ndrivers/net/ethernet/oa_tc6.c:1062:\tbool end_valid = FIELD_GET(OA_TC6_DATA_FOOTER_END_VALID, footer);\ndrivers/net/ethernet/oa_tc6.c-1063-\tu16 size;\n--\ndrivers/net/ethernet/oa_tc6.c-1081-\tif (start_valid \u0026\u0026 !end_valid) {\ndrivers/net/ethernet/oa_tc6.c:1082:\t\tsize = OA_TC6_CHUNK_PAYLOAD_SIZE - start_byte_offset;\ndrivers/net/ethernet/oa_tc6.c-1083-\t\treturn oa_tc6_prcs_rx_frame_start(tc6,\n--\ndrivers/net/ethernet/oa_tc6.c-1114-\t\t}\ndrivers/net/ethernet/oa_tc6.c:1115:\t\tsize = OA_TC6_CHUNK_PAYLOAD_SIZE - start_byte_offset;\ndrivers/net/ethernet/oa_tc6.c-1116-\t\treturn oa_tc6_prcs_rx_frame_start(tc6,\n--\ndrivers/net/ethernet/oa_tc6.c=1135=static int oa_tc6_process_spi_data_rx_buf(struct oa_tc6 tc6, u16 length)\ndrivers/net/ethernet/oa_tc6.c-1136-{\ndrivers/net/ethernet/oa_tc6.c:1137:\tu16 no_of_rx_chunks = length / OA_TC6_CHUNK_SIZE;\ndrivers/net/ethernet/oa_tc6.c-1138-\tbool retry = false;\n--\ndrivers/net/ethernet/oa_tc6.c-1144-\t\t/ Last 4 bytes in each received chunk consist footer info /\ndrivers/net/ethernet/oa_tc6.c:1145:\t\tfooter = oa_tc6_get_rx_chunk_footer(tc6, i OA_TC6_CHUNK_SIZE +\ndrivers/net/ethernet/oa_tc6.c:1146:\t\t\t\t\t\t OA_TC6_CHUNK_PAYLOAD_SIZE);\ndrivers/net/ethernet/oa_tc6.c-1147-\n--\ndrivers/net/ethernet/oa_tc6.c-1158-\t\t /\ndrivers/net/ethernet/oa_tc6.c:1159:\t\tif (FIELD_GET(OA_TC6_DATA_FOOTER_DATA_VALID, footer)) {\ndrivers/net/ethernet/oa_tc6.c-1160-\t\t\tu8 payload = tc6-\u003espi_data_rx_buf + i \ndrivers/net/ethernet/oa_tc6.c:1161:\t\t\t\t OA_TC6_CHUNK_SIZE;\ndrivers/net/ethernet/oa_tc6.c-1162-\n--\ndrivers/net/ethernet/oa_tc6.c=1196=static __be32 oa_tc6_prepare_data_header(bool data_valid, bool start_valid,\n--\ndrivers/net/ethernet/oa_tc6.c-1198-{\ndrivers/net/ethernet/oa_tc6.c:1199:\tu32 header = FIELD_PREP(OA_TC6_DATA_HEADER_DATA_NOT_CTRL,\ndrivers/net/ethernet/oa_tc6.c:1200:\t\t\t\tOA_TC6_DATA_HEADER) \|\ndrivers/net/ethernet/oa_tc6.c:1201:\t\t FIELD_PREP(OA_TC6_DATA_HEADER_DATA_VALID, data_valid) \|\ndrivers/net/ethernet/oa_tc6.c:1202:\t\t FIELD_PREP(OA_TC6_DATA_HEADER_START_VALID, start_valid) \|\ndrivers/net/ethernet/oa_tc6.c:1203:\t\t FIELD_PREP(OA_TC6_DATA_HEADER_END_VALID, end_valid) \|\ndrivers/net/ethernet/oa_tc6.c:1204:\t\t FIELD_PREP(OA_TC6_DATA_HEADER_END_BYTE_OFFSET,\ndrivers/net/ethernet/oa_tc6.c-1205-\t\t\t\tend_byte_offset);\ndrivers/net/ethernet/oa_tc6.c-1206-\ndrivers/net/ethernet/oa_tc6.c:1207:\theader \|= FIELD_PREP(OA_TC6_DATA_HEADER_PARITY,\ndrivers/net/ethernet/oa_tc6.c-1208-\t\t\t oa_tc6_get_parity(header));\n--\ndrivers/net/ethernet/oa_tc6.c=1213=static void oa_tc6_add_tx_skb_to_spi_buf(struct oa_tc6 tc6)\ndrivers/net/ethernet/oa_tc6.c-1214-{\ndrivers/net/ethernet/oa_tc6.c:1215:\tenum oa_tc6_data_end_valid_info end_valid = OA_TC6_DATA_END_INVALID;\ndrivers/net/ethernet/oa_tc6.c-1216-\t__be32 *tx_buf = tc6-\u003espi_data_tx_buf + tc6-\u003espi_data_tx_buf_offset;\n\n" }
7/2	2026/09/07 08:22	llm	patch-evaluator	0m Model: gemini-3.7-flash Args: null Results: null Tokens: input: 33595 output: 32 thoughts: 25 Thoughts: Here's my thought process, as if I were considering this myself: Investigating the MICROCHIP_T1S_PHY Configuration Okay, so I need to figure out where the configuration option `MICROCHIP_T1S_PHY` is defined. My first instinct, given its nature as a PHY (physical layer) driver, is to check the `Kconfig` file within the network driver's directory. Specifically, I should look in `drivers/net/phy/Kconfig`. This file usually handles all the PHY-related configuration options. That's the most logical place to start digging for the `MICROCHIP_T1S_PHY` definition. Let's see what's in there.
8/2	2026/09/07 08:22	tool	grepper	0m Args: { "Expression": "MICROCHIP_T1S", "PathPrefix": "drivers/net/phy" } Results: { "Output": "drivers/net/phy/Kconfig=323=config MICREL_PHY\n--\ndrivers/net/phy/Kconfig-329-\ndrivers/net/phy/Kconfig:330:config MICROCHIP_T1S_PHY\ndrivers/net/phy/Kconfig-331-\ttristate \"Microchip 10BASE-T1S Ethernet PHYs\"\n--\ndrivers/net/phy/Makefile=82=obj-$(CONFIG_MICROCHIP_T1_PHY)\t+= microchip_t1.o\ndrivers/net/phy/Makefile:83:obj-$(CONFIG_MICROCHIP_T1S_PHY) += microchip_t1s.o\ndrivers/net/phy/Makefile-84-obj-$(CONFIG_MICROSEMI_PHY)\t+= mscc/\n" }
9/2	2026/09/07 08:22	llm	patch-evaluator	0m Model: gemini-3.7-flash Args: null Results: null Tokens: input: 34012 output: 44 thoughts: 24 Thoughts: Here's my take on those thoughts, tailored for an expert audience: Kconfig Dive for LAN865x Ethernet Drivers Okay, time to get my hands dirty. Let's start with the `Kconfig` file for the LAN865x Ethernet drivers. That's the logical first stop. I need to understand what configuration options are available and how they're structured within the build system. I'm looking for things like: * Feature Flags: Are there conditional build options for things like specific PHY configurations, interrupt modes (polling, interrupt-driven, etc.), or DMA support? * Dependencies: What other kernel components or drivers need to be enabled for the LAN865x driver to function correctly? Are there specific dependencies on network stack features or MAC address management? * Defaults and Help Text: What are the default settings for each option? And, of course, the helpful descriptions that will guide developers. The comments have to be clear and concise. * Architecture-Specific Selections: Does the Kconfig expose any architecture specific selections like cache line sizes or memory regions? I'm hoping this Kconfig is well-organized, with a clear hierarchy that reflects the logical structure of the driver and its capabilities. It's often where the story of the driver's configuration begins. I'm keen to see if any new features have been added or if some of the existing options have changed. Let's see what we've got.
10/2	2026/09/07 08:22	tool	read-file	0m Args: { "File": "drivers/net/ethernet/microchip/lan865x/Kconfig", "FirstLine": 1, "LineCount": 30 } Results: { "Contents": " 1:\t# SPDX-License-Identifier: GPL-2.0-only\n 2:\t#\n 3:\t# Microchip LAN865x Driver Support\n 4:\t#\n 5:\t\n 6:\tif NET_VENDOR_MICROCHIP\n 7:\t\n 8:\tconfig LAN865X\n 9:\t\ttristate \"LAN865x support\"\n 10:\t\tdepends on SPI\n 11:\t\tselect OA_TC6\n 12:\t\thelp\n 13:\t\t Support for the Microchip LAN8650/1 Rev.B0/B1 MACPHY Ethernet chip. It\n 14:\t\t uses OPEN Alliance 10BASE-T1x Serial Interface specification.\n 15:\t\n 16:\t\t To compile this driver as a module, choose M here. The module will be\n 17:\t\t called lan865x.\n 18:\t\n 19:\tendif # NET_VENDOR_MICROCHIP\n" }
11/2	2026/09/07 08:22	llm	patch-evaluator	0m Model: gemini-3.7-flash Args: null Results: null Tokens: input: 34650 output: 37 thoughts: 27 Thoughts: Here's my thought process, as requested: Navigating the Kconfig Labyrinth Okay, so I need to find the configuration options related to OA_TC6. My instinct is to head straight to `drivers/net/ethernet/Kconfig`, as that's the most logical place to start digging for Ethernet-related configurations. I vaguely recall that type of option often being defined around line 149. Time to fire up my editor and take a look. Let's see what gems are hidden in that particular section...hopefully the author was kind enough to organize things in a clear manner.
12/2	2026/09/07 08:22	tool	read-file	0m Args: { "File": "drivers/net/ethernet/Kconfig", "FirstLine": 145, "LineCount": 25 } Results: { "Contents": " 145:\t\tselect BITREVERSE\n 146:\t\thelp\n 147:\t\t Say Y here if you want to use the OpenCores 10/100 Mbps Ethernet MAC.\n 148:\t\n 149:\tconfig OA_TC6\n 150:\t\ttristate \"OPEN Alliance TC6 10BASE-T1x MAC-PHY support\" if COMPILE_TEST\n 151:\t\tdepends on SPI\n 152:\t\tselect PHYLIB\n 153:\t\thelp\n 154:\t\t This library implements OPEN Alliance TC6 10BASE-T1x MAC-PHY\n 155:\t\t Serial Interface protocol for supporting 10BASE-T1x MAC-PHYs.\n 156:\t\n 157:\t\t To know the implementation details, refer documentation in\n 158:\t\t \u003cfile:Documentation/networking/oa-tc6-framework.rst\u003e.\n 159:\t\n 160:\tsource \"drivers/net/ethernet/pasemi/Kconfig\"\n 161:\tsource \"drivers/net/ethernet/pensando/Kconfig\"\n 162:\tsource \"drivers/net/ethernet/qlogic/Kconfig\"\n 163:\tsource \"drivers/net/ethernet/brocade/Kconfig\"\n 164:\tsource \"drivers/net/ethernet/qualcomm/Kconfig\"\n 165:\tsource \"drivers/net/ethernet/rdc/Kconfig\"\n 166:\tsource \"drivers/net/ethernet/realtek/Kconfig\"\n 167:\tsource \"drivers/net/ethernet/renesas/Kconfig\"\n 168:\tsource \"drivers/net/ethernet/rocker/Kconfig\"\n 169:\tsource \"drivers/net/ethernet/samsung/Kconfig\"\n" }
13/2	2026/09/07 08:22	llm	patch-evaluator	0m Model: gemini-3.7-flash Args: null Results: null Tokens: input: 35313 output: 26 thoughts: 612 Thoughts: My Assessment of LAN865X/OA_TC6/MICROCHIP_T1S Reachability in Syzkaller Okay, let's break this down. My goal is to determine if I can actually fuzz these drivers – LAN865X, OA_TC6, and MICROCHIP_T1S – using syzkaller. The core question is: are they reachable within the standard virtualized environments like QEMU and GCE that syzkaller leverages? This "reachability" is the key. Fuzzing unreachable code is a waste of resources. First, I need to understand what these drivers are. LAN865X is a SPI driver (`struct spi_driver`), `lan865x_driver`. MICROCHIP_T1S is a PHY driver (`struct phy_driver`, `microchip_t1s_driver[]`). OA_TC6 is a supporting library for SPI MAC-PHYs used by `lan865x` and `adin1140`. Now, the crucial question: can I instantiate or probe SPI and PHY devices within a typical QEMU x86_64 environment? That's the gatekeeper. Standard QEMU doesn't seem to have a generic SPI bus instantiation. Unless, there's some kind of mock SPI controller, USB-to-SPI adapter, platform device, or maybe even a configfs SPI device. Hmm, does Linux even let you instantiate SPI devices from userspace directly? Does QEMU even have SPI support by default? Let me step back and check syzkaller's documentation or examples. Has it been used to test SPI devices before? What about how SPI devices are tested in general? Wait, there's that principle: REACHABILITY IS THE PRIMARY GATE. I need to be sure the code can execute in these environments. If it's structurally unreachable, don't fuzz it. This brings me to Section 2. That lists examples of "structurally unreachable" hardware. Things like vendor-specific PCIe switches, SmartNICs, or GPU drivers that need dedicated hardware not emulated in standard QEMU. Also unreachable execution paths, like driver teardown callbacks (e.g., `.remove`, `.shutdown`, `pci_unregister_driver`) executed only during physical PCI hot-unplug or manual sysfs unbinding, and code paths specific to non-target architectures. So, where do SPI and PHY drivers fit in? Can I even reach or probe LAN865x or Microchip PHYs? I have to figure out if syzkaller or standard QEMU can do that. Is there a "spi-mock," a "spi-controller," or some netlink or MDIO trick? I better search the kernel for any mention of SPI controllers or MDIO. Time to dig in and find out.
14/2	2026/09/07 08:22	tool	grepper	0m Args: { "Expression": "lan8650", "PathPrefix": "drivers" } Results: { "Output": "drivers/net/ethernet/microchip/lan865x/lan865x.c-12-\ndrivers/net/ethernet/microchip/lan865x/lan865x.c:13:#define DRV_NAME\t\t\t\"lan8650\"\ndrivers/net/ethernet/microchip/lan865x/lan865x.c-14-\n--\ndrivers/net/ethernet/microchip/lan865x/lan865x.c=430=static const struct spi_device_id lan865x_ids[] = {\ndrivers/net/ethernet/microchip/lan865x/lan865x.c:431:\t{ .name = \"lan8650\" },\ndrivers/net/ethernet/microchip/lan865x/lan865x.c-432-\t{ .name = \"lan8651\" },\n--\ndrivers/net/ethernet/microchip/lan865x/lan865x.c=437=static const struct of_device_id lan865x_dt_ids[] = {\ndrivers/net/ethernet/microchip/lan865x/lan865x.c:438:\t{ .compatible = \"microchip,lan8650\" },\ndrivers/net/ethernet/microchip/lan865x/lan865x.c-439-\t{ .compatible = \"microchip,lan8651\" },\n--\ndrivers/net/phy/microchip_t1s.c-6- * lan8670/1/2 Rev.B1/C1/C2/D0\ndrivers/net/phy/microchip_t1s.c:7: * lan8650/1 Rev.B0/B1 Internal PHYs\ndrivers/net/phy/microchip_t1s.c-8- */\n" }
15/2	2026/09/07 08:22	llm	patch-evaluator	0m Model: gemini-3.7-flash Args: null Results: null Tokens: input: 37042 output: 26 thoughts: 218 Thoughts: My Initial Assessment of the LAN865x Drivers Okay, so I'm looking at `lan865x`, which is clearly an SPI driver tailored for those Microchip LAN8650/1 chips. Then there's `microchip_t1s`, which I immediately recognize as an MDIO PHY driver, specifically for the LAN867x/LAN865x ethernet PHYs. And finally, `oa_tc6` – that's the OPEN Alliance TC6 library; the 10BASE-T1x MAC-PHY support that both `lan865x` and the `adin1140` SPI ethernet controllers leverage. Now, my mind starts to wander. I have to think about potential scenarios. Are we talking strictly physical hardware here, or are there virtual devices in play? Can we possibly have virtual SPI or MDIO devices that attach to this, or could we somehow create a virtual instance of `lan8650` or `microchip_t1s`? That would definitely change the landscape. My next step has to be a deeper investigation. I'm going to quickly check if syzkaller has any pseudo-syscalls or if there are any obvious userspace interfaces that allow us to bind SPI or PHY devices. I need to know if this is fundamentally limited to physical hardware or if there's any flexibility. I have to think about how SPI devices are typically managed and created in the kernel – are there sysfs, configfs, ioctl mechanisms, or similar methods that might be relevant? Time to dive into `drivers/spi/` and start digging.
16/2	2026/09/07 08:22	tool	grepper	0m Args: { "Expression": "new_device", "PathPrefix": "drivers/spi" } Results: { "Output": "drivers/spi/spi-altera-dfl.c=124=static int dfl_spi_altera_probe(struct dfl_device dfl_dev)\n--\ndrivers/spi/spi-altera-dfl.c-174-\ndrivers/spi/spi-altera-dfl.c:175:\tif (!spi_new_device(host, \u0026board_info)) {\ndrivers/spi/spi-altera-dfl.c-176-\t\tdev_err(dev, \"%s failed to create SPI device: %s\\n\",\n--\ndrivers/spi/spi-altera-platform.c=35=static int altera_spi_probe(struct platform_device pdev)\n--\ndrivers/spi/spi-altera-platform.c-116-\t\tfor (i = 0; i \u003c pdata-\u003enum_devices; i++) {\ndrivers/spi/spi-altera-platform.c:117:\t\t\tif (!spi_new_device(host, pdata-\u003edevices + i))\ndrivers/spi/spi-altera-platform.c-118-\t\t\t\tdev_warn(\u0026pdev-\u003edev,\n--\ndrivers/spi/spi-butterfly.c=176=static void butterfly_attach(struct parport p)\n--\ndrivers/spi/spi-butterfly.c-265-\tpp-\u003einfo[0].controller_data = pp;\ndrivers/spi/spi-butterfly.c:266:\tpp-\u003edataflash = spi_new_device(pp-\u003ebitbang.ctlr, \u0026pp-\u003einfo[0]);\ndrivers/spi/spi-butterfly.c-267-\tif (pp-\u003edataflash)\n--\ndrivers/spi/spi-ch341.c=141=static int ch341_probe(struct usb_interface intf,\n--\ndrivers/spi/spi-ch341.c-206-\ndrivers/spi/spi-ch341.c:207:\tch341-\u003espidev = spi_new_device(ctrl, \u0026chip);\ndrivers/spi/spi-ch341.c-208-\tif (!ch341-\u003espidev) {\n--\ndrivers/spi/spi-cs42l43.c=312=static int cs42l43_spi_probe(struct platform_device pdev)\n--\ndrivers/spi/spi-cs42l43.c-426-\ndrivers/spi/spi-cs42l43.c:427:\t\tif (!spi_new_device(priv-\u003ectlr, ampl_info))\ndrivers/spi/spi-cs42l43.c-428-\t\t\treturn dev_err_probe(priv-\u003edev, -ENODEV,\n--\ndrivers/spi/spi-cs42l43.c-430-\ndrivers/spi/spi-cs42l43.c:431:\t\tif (!spi_new_device(priv-\u003ectlr, ampr_info))\ndrivers/spi/spi-cs42l43.c-432-\t\t\treturn dev_err_probe(priv-\u003edev, -ENODEV,\n--\ndrivers/spi/spi-intel.c=1375=static int intel_spi_populate_chip(struct intel_spi ispi)\n--\ndrivers/spi/spi-intel.c-1401-\ndrivers/spi/spi-intel.c:1402:\tif (!spi_new_device(ispi-\u003ehost, \u0026chip))\ndrivers/spi/spi-intel.c-1403-\t\treturn -ENODEV;\n--\ndrivers/spi/spi-intel.c-1430-\ndrivers/spi/spi-intel.c:1431:\tif (!spi_new_device(ispi-\u003ehost, \u0026chip))\ndrivers/spi/spi-intel.c-1432-\t\treturn -ENODEV;\n--\ndrivers/spi/spi-kspi2.c=310=static int kspi2_register_devices(struct kspi2 kspi)\n--\ndrivers/spi/spi-kspi2.c-316-\tfor (i = 0; i \u003c kspi-\u003eauxdev-\u003einfo_size; i++) {\ndrivers/spi/spi-kspi2.c:317:\t\tstruct spi_device device = spi_new_device(kspi-\u003ehost, \u0026info[i]);\ndrivers/spi/spi-kspi2.c-318-\n--\ndrivers/spi/spi-lm70llp.c=188=static void spi_lm70llp_attach(struct parport p)\n--\ndrivers/spi/spi-lm70llp.c-266-\tpp-\u003einfo.controller_data = pp;\ndrivers/spi/spi-lm70llp.c:267:\tpp-\u003espidev_lm70 = spi_new_device(pp-\u003ebitbang.ctlr, \u0026pp-\u003einfo);\ndrivers/spi/spi-lm70llp.c-268-\tif (pp-\u003espidev_lm70)\n--\ndrivers/spi/spi-lm70llp.c-271-\telse {\ndrivers/spi/spi-lm70llp.c:272:\t\tdev_warn(\u0026pd-\u003edev, \"spi_new_device failed\\n\");\ndrivers/spi/spi-lm70llp.c-273-\t\tstatus = -ENODEV;\n--\ndrivers/spi/spi-xilinx.c=402=static int xilinx_spi_probe(struct platform_device pdev)\n--\ndrivers/spi/spi-xilinx.c-509-\t\tfor (i = 0; i \u003c pdata-\u003enum_devices; i++)\ndrivers/spi/spi-xilinx.c:510:\t\t\tspi_new_device(host, pdata-\u003edevices + i);\ndrivers/spi/spi-xilinx.c-511-\t}\n--\ndrivers/spi/spi.c=297=static const struct attribute_group spi_controller_statistics_group = {\n--\ndrivers/spi/spi.c-304-/\ndrivers/spi/spi.c:305: new_device_store - instantiate a new SPI device from userspace\ndrivers/spi/spi.c-306- \n--\ndrivers/spi/spi.c-309- Examples:\ndrivers/spi/spi.c:310: * echo spidev 0 \u003e new_device\ndrivers/spi/spi.c:311: * echo spidev 0 10000000 \u003e new_device\ndrivers/spi/spi.c:312: * echo spidev 0 10000000 3 \u003e new_device\ndrivers/spi/spi.c-313- /\ndrivers/spi/spi.c=314=static ssize_t\ndrivers/spi/spi.c:315:new_device_store(struct device dev, struct device_attribute attr,\ndrivers/spi/spi.c-316-\t\t const char buf, size_t count)\n--\ndrivers/spi/spi.c-329-\tif (!blank) {\ndrivers/spi/spi.c:330:\t\tdev_err(dev, \"new_device: Missing parameters\\n\");\ndrivers/spi/spi.c-331-\t\treturn -EINVAL;\n--\ndrivers/spi/spi.c-334-\tif (blank == buf \|\| blank - buf \u003e SPI_NAME_SIZE - 1) {\ndrivers/spi/spi.c:335:\t\tdev_err(dev, \"new_device: Invalid device name\\n\");\ndrivers/spi/spi.c-336-\t\treturn -EINVAL;\n--\ndrivers/spi/spi.c-348-\tif (sscanf(++blank, \"%u %u %u\", \u0026chip_select, \u0026max_speed_hz, \u0026mode) \u003c 1) {\ndrivers/spi/spi.c:349:\t\tdev_err(dev, \"new_device: Can't parse chip select\\n\");\ndrivers/spi/spi.c-350-\t\treturn -EINVAL;\n--\ndrivers/spi/spi.c-359-\tif (chip_select \u003e U8_MAX \|\| chip_select \u003e= ctlr-\u003enum_chipselect) {\ndrivers/spi/spi.c:360:\t\tdev_err(dev, \"new_device: Chip select %u out of range (num_chipselect=%u)\\n\",\ndrivers/spi/spi.c-361-\t\t\tchip_select, ctlr-\u003enum_chipselect);\n--\ndrivers/spi/spi.c-372-\tif (mode \u0026 ~(u32)SPI_MODE_USER_MASK) {\ndrivers/spi/spi.c:373:\t\tdev_err(dev, \"new_device: Invalid mode bits 0x%x\\n\",\ndrivers/spi/spi.c-374-\t\t\tmode \u0026 ~(u32)SPI_MODE_USER_MASK);\n--\ndrivers/spi/spi.c-401-\t/\ndrivers/spi/spi.c:402:\t spi_unregister_controller() removes the new_device/delete_device\ndrivers/spi/spi.c-403-\t * sysfs group before taking add_lock, so kernfs_drain() has already\n--\ndrivers/spi/spi.c-421-\ndrivers/spi/spi.c:422:\tdev_info(dev, \"new_device: Instantiated device %s at CS%u\\n\",\ndrivers/spi/spi.c-423-\t\t modalias, chip_select);\n--\ndrivers/spi/spi.c-425-}\ndrivers/spi/spi.c:426:static DEVICE_ATTR_IGNORE_LOCKDEP(new_device, 0200, NULL, new_device_store);\ndrivers/spi/spi.c-427-\n--\ndrivers/spi/spi.c=471=static struct attribute spi_controller_userspace_attrs[] = {\ndrivers/spi/spi.c:472:\t\u0026dev_attr_new_device.attr,\ndrivers/spi/spi.c-473-\t\u0026dev_attr_delete_device.attr,\n--\ndrivers/spi/spi.c=477=static const struct attribute_group spi_controller_userspace_group = {\n--\ndrivers/spi/spi.c-484- spi_controller_userspace_group is registered manually for host controllers\ndrivers/spi/spi.c:485: * at the end of spi_register_controller() so new_device/delete_device only\ndrivers/spi/spi.c-486- * appear after DT/ACPI children and the queue are set up.\n--\ndrivers/spi/spi.c=979=EXPORT_SYMBOL_GPL(spi_add_device);\n--\ndrivers/spi/spi.c-981-/*\ndrivers/spi/spi.c:982: spi_new_device - instantiate one new SPI device\ndrivers/spi/spi.c-983- * @ctlr: Controller to which device is connected\n--\ndrivers/spi/spi.c-994- /\ndrivers/spi/spi.c:995:struct spi_device spi_new_device(struct spi_controller ctlr,\ndrivers/spi/spi.c-996-\t\t\t\t struct spi_board_info chip)\n--\ndrivers/spi/spi.c-1050-}\ndrivers/spi/spi.c:1051:EXPORT_SYMBOL_GPL(spi_new_device);\ndrivers/spi/spi.c-1052-\n--\ndrivers/spi/spi.c=1081=static void spi_match_controller_to_boardinfo(struct spi_controller ctlr,\n--\ndrivers/spi/spi.c-1088-\ndrivers/spi/spi.c:1089:\tdev = spi_new_device(ctlr, bi);\ndrivers/spi/spi.c-1090-\tif (!dev)\n--\ndrivers/spi/spi.c=3652=int spi_register_controller(struct spi_controller ctlr)\n--\ndrivers/spi/spi.c-3757-\t/\ndrivers/spi/spi.c:3758:\t Register the new_device/delete_device sysfs interface as the\ndrivers/spi/spi.c-3759-\t * final step of host controller bringup, only after the queue,\n--\ndrivers/spi/spi.c=3838=void spi_unregister_controller(struct spi_controller ctlr)\n--\ndrivers/spi/spi.c-3843-\t/\ndrivers/spi/spi.c:3844:\t * Drain in-flight new_device/delete_device sysfs stores and\ndrivers/spi/spi.c-3845-\t * prevent new ones from starting. Must happen before we take\n" }
17/2	2026/09/07 08:22	llm	patch-evaluator	0m Model: gemini-3.7-flash Args: null Results: null Tokens: input: 40812 output: 51 thoughts: 174 Thoughts: My Initial Thoughts on SPI Device Instantiation and the LAN865x Driver Okay, so I'm looking at this `new_device` entry in sysfs for SPI. Right, this is how you can dynamically instantiate a new SPI device from userspace. I see it's something like `echo lan8650 0 > /sys/class/spi_master/spiX/new_device`. Makes sense. But I'm immediately wondering about the environment – specifically, QEMU. Does QEMU even have native SPI controller support, or will I need to simulate it with something like `spi-loopback-test`, `spi-mock`, `spi-gpio`, or maybe even `spi-butterfly`? And, is Syzkaller hitting SPI, or is this a dead end? Okay, hold on. Before I dive too deep into the setup, let's back up and understand the actual device driver's behavior. I need to see what happens when this `lan865x` device is probed. I should check the probe function, starting with the `lan865x_probe` function. I will go directly to `drivers/net/ethernet/microchip/lan865x/lan865x.c` and analyze from line 330 to about 420. That's where the interesting stuff likely is. That should tell me what's actually happening on instantiation.
18/2	2026/09/07 08:22	tool	read-file	0m Args: { "File": "drivers/net/ethernet/microchip/lan865x/lan865x.c", "FirstLine": 330, "LineCount": 85 } Results: { "Contents": " 330:\t\t.ndo_eth_ioctl = phy_do_ioctl_running,\n 331:\t};\n 332:\t\n 333:\tstatic int lan865x_probe(struct spi_device spi)\n 334:\t{\n 335:\t\tstruct oa_tc6_quirks tc6_quirks = {};\n 336:\t\tstruct net_device netdev;\n 337:\t\tstruct lan865x_priv priv;\n 338:\t\tint ret;\n 339:\t\n 340:\t\tnetdev = alloc_etherdev(sizeof(struct lan865x_priv));\n 341:\t\tif (!netdev)\n 342:\t\t\treturn -ENOMEM;\n 343:\t\n 344:\t\tpriv = netdev_priv(netdev);\n 345:\t\tpriv-\u003enetdev = netdev;\n 346:\t\tpriv-\u003espi = spi;\n 347:\t\tspi_set_drvdata(spi, priv);\n 348:\t\tINIT_WORK(\u0026priv-\u003emulticast_work, lan865x_multicast_work_handler);\n 349:\t\n 350:\t\ttc6_quirks.quirk_flags = OA_TC6_PHY_INT;\n 351:\t\tpriv-\u003etc6 = oa_tc6_init(spi, netdev, \u0026tc6_quirks);\n 352:\t\tif (!priv-\u003etc6) {\n 353:\t\t\tret = -ENODEV;\n 354:\t\t\tgoto free_netdev;\n 355:\t\t}\n 356:\t\n 357:\t\t/ LAN865x Rev.B0/B1 configuration parameters from AN1760\n 358:\t\t * As per the Configuration Application Note AN1760 published in the\n 359:\t\t * link, https://www.microchip.com/en-us/application-notes/an1760\n 360:\t\t * Revision F (DS60001760G - June 2024), configure the MAC to set time\n 361:\t\t * stamping at the end of the Start of Frame Delimiter (SFD) and set the\n 362:\t\t * Timer Increment reg to 40 ns to be used as a 25 MHz internal clock.\n 363:\t\t /\n 364:\t\tret = oa_tc6_write_register(priv-\u003etc6, LAN865X_REG_MAC_TSU_TIMER_INCR,\n 365:\t\t\t\t\t MAC_TSU_TIMER_INCR_COUNT_NANOSECONDS);\n 366:\t\tif (ret) {\n 367:\t\t\tdev_err(\u0026spi-\u003edev, \"Failed to config TSU Timer Incr reg: %d\\n\",\n 368:\t\t\t\tret);\n 369:\t\t\tgoto oa_tc6_exit;\n 370:\t\t}\n 371:\t\n 372:\t\t/ As per the point s3 in the below errata, SPI receive Ethernet frame\n 373:\t\t * transfer may halt when starting the next frame in the same data block\n 374:\t\t * (chunk) as the end of a previous frame. The RFA field should be\n 375:\t\t * configured to 01b or 10b for proper operation. In these modes, only\n 376:\t\t * one receive Ethernet frame will be placed in a single data block.\n 377:\t\t * When the RFA field is written to 01b, received frames will be forced\n 378:\t\t * to only start in the first word of the data block payload (SWO=0). As\n 379:\t\t * recommended, enable zero align receive frame feature for proper\n 380:\t\t * operation.\n 381:\t\t \n 382:\t\t https://ww1.microchip.com/downloads/aemDocuments/documents/AIS/ProductDocuments/Errata/LAN8650-1-Errata-80001075.pdf\n 383:\t\t /\n 384:\t\tret = oa_tc6_zero_align_receive_frame_enable(priv-\u003etc6);\n 385:\t\tif (ret) {\n 386:\t\t\tdev_err(\u0026spi-\u003edev, \"Failed to set ZARFE: %d\\n\", ret);\n 387:\t\t\tgoto oa_tc6_exit;\n 388:\t\t}\n 389:\t\n 390:\t\t/ Get the MAC address from the SPI device tree node */\n 391:\t\tif (device_get_ethdev_address(\u0026spi-\u003edev, netdev))\n 392:\t\t\teth_hw_addr_random(netdev);\n 393:\t\n 394:\t\tret = lan865x_set_hw_macaddr(priv, netdev-\u003edev_addr);\n 395:\t\tif (ret) {\n 396:\t\t\tdev_err(\u0026spi-\u003edev, \"Failed to configure MAC: %d\\n\", ret);\n 397:\t\t\tgoto oa_tc6_exit;\n 398:\t\t}\n 399:\t\n 400:\t\tnetdev-\u003eif_port = IF_PORT_10BASET;\n 401:\t\tnetdev-\u003eirq = spi-\u003eirq;\n 402:\t\tnetdev-\u003enetdev_ops = \u0026lan865x_netdev_ops;\n 403:\t\tnetdev-\u003eethtool_ops = \u0026lan865x_ethtool_ops;\n 404:\t\n 405:\t\tret = register_netdev(netdev);\n 406:\t\tif (ret) {\n 407:\t\t\tdev_err(\u0026spi-\u003edev, \"Register netdev failed (ret = %d)\", ret);\n 408:\t\t\tgoto oa_tc6_exit;\n 409:\t\t}\n 410:\t\n 411:\t\treturn 0;\n 412:\t\n 413:\toa_tc6_exit:\n 414:\t\toa_tc6_exit(priv-\u003etc6);\n" }
19/2	2026/09/07 08:22	llm	patch-evaluator	0m Model: gemini-3.7-flash Args: null Results: null Tokens: input: 42889 output: 20 thoughts: 859 Thoughts: Fuzzing Feasibility Assessment Okay, let's break this down systematically. I'm looking at a patch that involves the `lan865x`, `oa_tc6`, and `microchip_t1s` components. My initial thought is to determine if this code is even reachable in a standard fuzzing environment. The triage philosophy prioritizes reachability as the primary gate. First, I remember that `lan865x` is a MAC-PHY connected via SPI. The critical question here is whether this hardware or anything similar can be emulated within the standard QEMU setup we're using. Sadly, QEMU's documentation and my prior knowledge tell me it doesn't emulate the LAN8650, LAN8651, or any Microchip T1S PHY, nor does it have an OA-TC6 chip emulation. Now, let's apply the triage philosophy. Section 1 stresses that fuzzing should only target code that executes in a standard virtual environment. Section 2 lays out the "negative criteria" for determining when to not fuzz. My primary concern is if the modified code falls into this category, specifically: "Structurally unreachable hardware" - like vendor-specific devices requiring physical ASIC cards unavailable in QEMU. Also, drivers that are only used during physical device removal, or are architecture-specific, are to be ignored. Section 3 outlines the "positive criteria," code that should be fuzzed. That includes anything in core subsystems, refactorings, runtime assertions, or drivers accessible via virtual buses such as virtio, USB gadget, etc. I've got four files in the modified code: `lan865x.c`, `oa_tc6.c`, `microchip_t1s.c`, and `oa_tc6.h`. My analysis says that: 1. `lan865x.c` is the Ethernet controller driver for the Microchip LAN865x family, using SPI. 2. `oa_tc6.c` is the Open Alliance TC6 10BASE-T1S MAC-PHY protocol library, also for SPI. 3. `microchip_t1s.c` is the Ethernet PHY driver for LAN867x/LAN865x. 4. `oa_tc6.h` is the associated header. Given that these are SPI drivers for physical MAC-PHY chips, the key question is: are any of these components usable with virtual drivers or emulated hardware? The answer looks to be no. Therefore, I need to check all the kernel uses of `oa_tc6` and decide if the modified code is reachable.
20/2	2026/09/07 08:22	tool	grepper	0m Args: { "Expression": "oa_tc6_init" } Results: { "Output": "Documentation/networking/oa-tc6-framework.rst=454=The include/linux/oa_tc6.h defines the following functions:\nDocumentation/networking/oa-tc6-framework.rst-455-\nDocumentation/networking/oa-tc6-framework.rst:456:.. c:function:: struct oa_tc6 oa_tc6_init(struct spi_device spi, \\\nDocumentation/networking/oa-tc6-framework.rst-457- struct net_device netdev, \\\n--\ndrivers/net/ethernet/adi/adin1140.c=709=static int adin1140_probe(struct spi_device spi)\n--\ndrivers/net/ethernet/adi/adin1140.c-726-\ndrivers/net/ethernet/adi/adin1140.c:727:\tpriv-\u003etc6 = oa_tc6_init(spi, netdev, \u0026tc6_quirks);\ndrivers/net/ethernet/adi/adin1140.c-728-\tif (!priv-\u003etc6)\n--\ndrivers/net/ethernet/microchip/lan865x/lan865x.c=333=static int lan865x_probe(struct spi_device spi)\n--\ndrivers/net/ethernet/microchip/lan865x/lan865x.c-350-\ttc6_quirks.quirk_flags = OA_TC6_PHY_INT;\ndrivers/net/ethernet/microchip/lan865x/lan865x.c:351:\tpriv-\u003etc6 = oa_tc6_init(spi, netdev, \u0026tc6_quirks);\ndrivers/net/ethernet/microchip/lan865x/lan865x.c-352-\tif (!priv-\u003etc6) {\n--\ndrivers/net/ethernet/oa_tc6.c=1505=static int oa_tc6_check_ctrl_protection(struct oa_tc6 tc6)\n--\ndrivers/net/ethernet/oa_tc6.c-1519-/*\ndrivers/net/ethernet/oa_tc6.c:1520: oa_tc6_init - allocates and initializes oa_tc6 structure.\ndrivers/net/ethernet/oa_tc6.c-1521- * @spi: device with which data will be exchanged.\n--\ndrivers/net/ethernet/oa_tc6.c-1527- /\ndrivers/net/ethernet/oa_tc6.c:1528:struct oa_tc6 oa_tc6_init(struct spi_device spi, struct net_device netdev,\ndrivers/net/ethernet/oa_tc6.c-1529-\t\t\t struct oa_tc6_quirks quirks)\n--\ndrivers/net/ethernet/oa_tc6.c-1644-}\ndrivers/net/ethernet/oa_tc6.c:1645:EXPORT_SYMBOL_GPL(oa_tc6_init);\ndrivers/net/ethernet/oa_tc6.c-1646-\n--\ninclude/linux/oa_tc6.h=76=struct oa_tc6_quirks {\n--\ninclude/linux/oa_tc6.h-79-\ninclude/linux/oa_tc6.h:80:struct oa_tc6 oa_tc6_init(struct spi_device spi, struct net_device netdev,\ninclude/linux/oa_tc6.h-81-\t\t\t struct oa_tc6_quirks *quirks);\n" }
21/2	2026/09/07 08:22	llm	patch-evaluator	0m Model: gemini-3.7-flash Args: null Results: null Tokens: input: 45259 output: 176 thoughts: 525 Thoughts: My Assessment of the Unreachability of the Modified Code Okay, here's the deal: I've looked at the calls to `oa_tc6_init`. I see that it's only called by `adin1140_probe` and `lan865x_probe`. These are SPI Ethernet controller drivers, specifically for the Analog Devices ADIN1140 and the Microchip LAN8650/1 chips. Then there's `microchip_t1s`, a PHY driver for the Microchip LAN867x / LAN865x PHY hardware chips. These are not generic devices. They're physical ICs – 10BASE-T1S single-pair Ethernet MAC-PHYs or PHYs that connect over SPI/MDIO. And, as far as I know, these aren't emulated by QEMU or Google Compute Engine VMs, which are standard environments for our fuzzing efforts. Without that actual hardware or a usable SPI device, neither `lan865x_probe`, `adin1140_probe`, `oa_tc6`, nor `microchip_t1s_driver` can be probed or run. So, in essence, all of the modified code is structurally unreachable. It's essentially dead code in our current fuzzing setup. Now, let's verify if all the pre-requisites are met: 1. Is `WorthFuzzing` false? Yes, absolutely. The changes are all specific to hardware (the `lan865x`, `oa_tc6`, and `microchip_t1s` drivers) that we can't emulate in our typical virtualized fuzzing environments. 2. Are `FocusSymbols` and `EnableConfigs` appropriately set when `WorthFuzzing` is false? They should be null or an empty list. So, let's double-check the parameter formatting for `set-results`: `EnableConfigs` should be a list of strings or null. `FocusSymbols` as well, should be a list of strings or null. I will provide a clear and concise `Reasoning` and set `WorthFuzzing` to boolean. I think a clear, concise reasoning statement would be: "The changes modify the Microchip LAN865x Ethernet driver, the Open Alliance TC6 SPI MAC-PHY support library, and the Microchip 10BASE-T1S PHY driver. These drivers require specific physical 10BASE-T1S Ethernet / MAC-PHY hardware attached via SPI/MDIO which is not emulated in standard QEMU/GCE virtualized environments, making the code structurally unreachable during fuzzing." Alright, time to call `set-results`.
22/2	2026/09/07 08:22	tool	set-results	0m Args: { "EnableConfigs": [], "FocusSymbols": [], "Reasoning": "The patch modifies the Microchip LAN865x SPI Ethernet driver (drivers/net/ethernet/microchip/lan865x/lan865x.c), the Open Alliance TC6 MAC-PHY protocol layer (drivers/net/ethernet/oa_tc6.c), and the Microchip 10BASE-T1S PHY driver (drivers/net/phy/microchip_t1s.c). These drivers operate on specific physical 10BASE-T1S single-pair Ethernet hardware connected over SPI/MDIO that is not emulated in standard QEMU/GCE virtualized fuzzing environments, making the modified code structurally unreachable.", "WorthFuzzing": false } Results: { "EnableConfigs": null, "FocusSymbols": [], "Reasoning": "The patch modifies the Microchip LAN865x SPI Ethernet driver (drivers/net/ethernet/microchip/lan865x/lan865x.c), the Open Alliance TC6 MAC-PHY protocol layer (drivers/net/ethernet/oa_tc6.c), and the Microchip 10BASE-T1S PHY driver (drivers/net/phy/microchip_t1s.c). These drivers operate on specific physical 10BASE-T1S single-pair Ethernet hardware connected over SPI/MDIO that is not emulated in standard QEMU/GCE virtualized fuzzing environments, making the modified code structurally unreachable.", "WorthFuzzing": false }
23/1	2026/09/07 08:22	action	If	0m Args: { "WorthFuzzing": false } Results: null

{
  "EnableConfigs": null,
  "FocusSymbols": [],
  "KMSANReasoning": "",
  "NeedsKMSAN": false,
  "Reasoning": "The patch modifies the Microchip LAN865x SPI Ethernet driver (drivers/net/ethernet/microchip/lan865x/lan865x.c), the Open Alliance TC6 MAC-PHY protocol layer (drivers/net/ethernet/oa_tc6.c), and the Microchip 10BASE-T1S PHY driver (drivers/net/phy/microchip_t1s.c). These drivers operate on specific physical 10BASE-T1S single-pair Ethernet hardware connected over SPI/MDIO that is not emulated in standard QEMU/GCE virtualized fuzzing environments, making the modified code structurally unreachable.",
  "WorthFuzzing": false
}

{
  "PatchDiff": "commit 44bc1c37f7e866eb997d8878a5f6e7f7050b7d1f\nAuthor: syz-cluster \u003ctriage@syzkaller.com\u003e\nDate:   Mon Sep 7 08:22:04 2026 +0000\n\n    syz-cluster: applied patch under review\n\ndiff --git a/drivers/net/ethernet/microchip/lan865x/lan865x.c b/drivers/net/ethernet/microchip/lan865x/lan865x.c\nindex 26a2761332a5a..043a3dc3f9657 100644\n--- a/drivers/net/ethernet/microchip/lan865x/lan865x.c\n+++ b/drivers/net/ethernet/microchip/lan865x/lan865x.c\n@@ -332,6 +332,7 @@ static const struct net_device_ops lan865x_netdev_ops = {\n \n static int lan865x_probe(struct spi_device *spi)\n {\n+\tstruct oa_tc6_quirks tc6_quirks = {};\n \tstruct net_device *netdev;\n \tstruct lan865x_priv *priv;\n \tint ret;\n@@ -346,7 +347,8 @@ static int lan865x_probe(struct spi_device *spi)\n \tspi_set_drvdata(spi, priv);\n \tINIT_WORK(\u0026priv-\u003emulticast_work, lan865x_multicast_work_handler);\n \n-\tpriv-\u003etc6 = oa_tc6_init(spi, netdev, NULL);\n+\ttc6_quirks.quirk_flags = OA_TC6_PHY_INT;\n+\tpriv-\u003etc6 = oa_tc6_init(spi, netdev, \u0026tc6_quirks);\n \tif (!priv-\u003etc6) {\n \t\tret = -ENODEV;\n \t\tgoto free_netdev;\ndiff --git a/drivers/net/ethernet/oa_tc6.c b/drivers/net/ethernet/oa_tc6.c\nindex 6fcc5f561d560..00b0176c1fe7a 100644\n--- a/drivers/net/ethernet/oa_tc6.c\n+++ b/drivers/net/ethernet/oa_tc6.c\n@@ -8,6 +8,8 @@\n #include \u003clinux/bitfield.h\u003e\n #include \u003clinux/iopoll.h\u003e\n #include \u003clinux/interrupt.h\u003e\n+#include \u003clinux/irq.h\u003e\n+#include \u003clinux/irqdomain.h\u003e\n #include \u003clinux/mdio.h\u003e\n #include \u003clinux/phy.h\u003e\n #include \u003clinux/oa_tc6.h\u003e\n@@ -70,6 +72,8 @@ struct oa_tc6 {\n \tstruct phy_device *phydev;\n \tstruct mii_bus *mdiobus;\n \tstruct spi_device *spi;\n+\tstruct irq_domain *phy_irq_domain;\n+\tint phy_virq;\n \tstruct mutex spi_ctrl_lock; /* Protects spi control transfer */\n \tspinlock_t tx_skb_lock; /* Protects tx skb handling */\n \tvoid *spi_ctrl_tx_buf;\n@@ -528,6 +532,44 @@ int oa_tc6_mdiobus_write_c45(struct mii_bus *bus, int addr, int devnum,\n }\n EXPORT_SYMBOL_GPL(oa_tc6_mdiobus_write_c45);\n \n+static int oa_tc6_phy_irq_map(struct irq_domain *domain, unsigned int irq,\n+\t\t\t      irq_hw_number_t hwirq)\n+{\n+\tirq_set_chip_data(irq, domain-\u003ehost_data);\n+\tirq_set_chip_and_handler(irq, \u0026dummy_irq_chip, handle_simple_irq);\n+\tirq_set_nested_thread(irq, true);\n+\tirq_set_noprobe(irq);\n+\n+\treturn 0;\n+}\n+\n+static const struct irq_domain_ops oa_tc6_phy_irq_domain_ops = {\n+\t.map = oa_tc6_phy_irq_map,\n+};\n+\n+static int oa_tc6_phy_irq_setup(struct oa_tc6 *tc6)\n+{\n+\ttc6-\u003ephy_irq_domain =\n+\t\tirq_domain_create_linear(NULL, 1,\n+\t\t\t\t\t \u0026oa_tc6_phy_irq_domain_ops, tc6);\n+\tif (!tc6-\u003ephy_irq_domain)\n+\t\treturn -ENOMEM;\n+\n+\ttc6-\u003ephy_virq = irq_create_mapping(tc6-\u003ephy_irq_domain, 0);\n+\tif (!tc6-\u003ephy_virq) {\n+\t\tirq_domain_remove(tc6-\u003ephy_irq_domain);\n+\t\treturn -ENOMEM;\n+\t}\n+\n+\treturn 0;\n+}\n+\n+static void oa_tc6_phy_irq_teardown(struct oa_tc6 *tc6)\n+{\n+\tirq_dispose_mapping(tc6-\u003ephy_virq);\n+\tirq_domain_remove(tc6-\u003ephy_irq_domain);\n+}\n+\n static int oa_tc6_mdiobus_register(struct oa_tc6 *tc6)\n {\n \tint ret;\n@@ -559,9 +601,25 @@ static int oa_tc6_mdiobus_register(struct oa_tc6 *tc6)\n \tsnprintf(tc6-\u003emdiobus-\u003eid, ARRAY_SIZE(tc6-\u003emdiobus-\u003eid), \"%s\",\n \t\t dev_name(\u0026tc6-\u003espi-\u003edev));\n \n+\tif (tc6-\u003equirk_flags \u0026 OA_TC6_PHY_INT) {\n+\t\tret = oa_tc6_phy_irq_setup(tc6);\n+\t\tif (ret) {\n+\t\t\tmdiobus_free(tc6-\u003emdiobus);\n+\t\t\treturn ret;\n+\t\t}\n+\t\t/* Populate all irq[] entries before registration so\n+\t\t * phy_device_create() picks up the virtual IRQ regardless of\n+\t\t * the PHY's MDIO address.\n+\t\t */\n+\t\tfor (int i = 0; i \u003c PHY_MAX_ADDR; i++)\n+\t\t\ttc6-\u003emdiobus-\u003eirq[i] = tc6-\u003ephy_virq;\n+\t}\n+\n \tret = mdiobus_register(tc6-\u003emdiobus);\n \tif (ret) {\n \t\tnetdev_err(tc6-\u003enetdev, \"Could not register MDIO bus\\n\");\n+\t\tif (tc6-\u003equirk_flags \u0026 OA_TC6_PHY_INT)\n+\t\t\toa_tc6_phy_irq_teardown(tc6);\n \t\tmdiobus_free(tc6-\u003emdiobus);\n \t\treturn ret;\n \t}\n@@ -572,6 +630,8 @@ static int oa_tc6_mdiobus_register(struct oa_tc6 *tc6)\n static void oa_tc6_mdiobus_unregister(struct oa_tc6 *tc6)\n {\n \tmdiobus_unregister(tc6-\u003emdiobus);\n+\tif (tc6-\u003equirk_flags \u0026 OA_TC6_PHY_INT)\n+\t\toa_tc6_phy_irq_teardown(tc6);\n \tmdiobus_free(tc6-\u003emdiobus);\n }\n \n@@ -661,7 +721,7 @@ static int oa_tc6_sw_reset_macphy(struct oa_tc6 *tc6)\n \treturn oa_tc6_write_register(tc6, OA_TC6_REG_STATUS0, regval);\n }\n \n-static int oa_tc6_unmask_macphy_error_interrupts(struct oa_tc6 *tc6)\n+static int oa_tc6_unmask_interrupts(struct oa_tc6 *tc6)\n {\n \tu32 regval;\n \tint ret;\n@@ -670,7 +730,8 @@ static int oa_tc6_unmask_macphy_error_interrupts(struct oa_tc6 *tc6)\n \tif (ret)\n \t\treturn ret;\n \n-\tregval \u0026= ~(OA_TC6_INT_MASK0_TX_PROTOCOL_ERR_MASK |\n+\tregval \u0026= ~(OA_TC6_INT_MASK0_PHY_INT_MASK |\n+\t\t    OA_TC6_INT_MASK0_TX_PROTOCOL_ERR_MASK |\n \t\t    OA_TC6_INT_MASK0_RX_BUFFER_OVERFLOW_ERR_MASK |\n \t\t    OA_TC6_INT_MASK0_LOSS_OF_FRAME_ERR_MASK |\n \t\t    OA_TC6_INT_MASK0_HEADER_ERR_MASK);\n@@ -810,6 +871,15 @@ static int oa_tc6_process_extended_status(struct oa_tc6 *tc6)\n \t\treturn ret;\n \t}\n \n+\t/* Dispatch the PHY interrupt to phylib via the nested virtual IRQ so\n+\t * the PHY driver reads and acknowledges its status. PHYINT is level\n+\t * triggered, so doing this synchronously here (in the sleepable\n+\t * threaded IRQ) clears the source before the next data chunk.\n+\t */\n+\tif ((tc6-\u003equirk_flags \u0026 OA_TC6_PHY_INT) \u0026\u0026\n+\t    FIELD_GET(OA_TC6_STATUS0_PHY_INT, value))\n+\t\thandle_nested_irq(tc6-\u003ephy_virq);\n+\n \tif (FIELD_GET(OA_TC6_STATUS0_RX_BUFFER_OVERFLOW_ERROR, value)) {\n \t\toa_tc6_look_for_new_frame(tc6);\n \t\tnet_err_ratelimited(\"%s: Receive buffer overflow error\\n\",\n@@ -1518,7 +1588,7 @@ struct oa_tc6 *oa_tc6_init(struct spi_device *spi, struct net_device *netdev,\n \t\treturn NULL;\n \t}\n \n-\tret = oa_tc6_unmask_macphy_error_interrupts(tc6);\n+\tret = oa_tc6_unmask_interrupts(tc6);\n \tif (ret) {\n \t\tdev_err(\u0026tc6-\u003espi-\u003edev,\n \t\t\t\"MAC-PHY error interrupts unmask failed: %d\\n\", ret);\ndiff --git a/drivers/net/phy/microchip_t1s.c b/drivers/net/phy/microchip_t1s.c\nindex 73c23d311d72a..c3a738c7425bf 100644\n--- a/drivers/net/phy/microchip_t1s.c\n+++ b/drivers/net/phy/microchip_t1s.c\n@@ -27,11 +27,23 @@\n #define LAN865X_REG_CFGPARAM_CTRL 0x00DA\n #define LAN865X_REG_STS2 0x0019\n \n+/* PHY interrupt status and mask registers (MDIO_MMD_VEND2). The status bits\n+ * are read-to-clear; a mask bit is enabled by writing 0.\n+ */\n+#define LAN86XX_REG_STS1\t\t0x0018\n+#define LAN86XX_REG_IMSK1\t\t0x001C\n+\n+#define LAN86XX_STS1_LINK_STS_CHANGED\tBIT(13)\n+#define LAN86XX_STS1_PLCA_STS_CHANGED\tBIT(11)\n+\n /* Collision Detector Control 0 Register */\n #define LAN86XX_REG_COL_DET_CTRL0\t0x0087\n #define COL_DET_CTRL0_ENABLE_BIT_MASK\tBIT(15)\n #define COL_DET_ENABLE\t\t\tBIT(15)\n #define COL_DET_DISABLE\t\t\t0x0000\n+#define COL_DET_CTRL0_CCMFC_MASK\tGENMASK(10, 9)\n+/* OA default: collisions gated by PLCA_Status in hardware */\n+#define COL_DET_CTRL0_CCMFC_OA_DEFAULT\tBIT(9)\n \n /* LAN8670/1/2 Rev.D0 Link Status Selection Register */\n #define LAN867X_REG_LINK_STATUS_CTRL\t0x0012\n@@ -458,6 +470,16 @@ static int lan86xx_plca_set_cfg(struct phy_device *phydev,\n \tif (ret)\n \t\treturn ret;\n \n+\t/* PHYs with routed interrupts handle CDEN dynamically via the interrupt\n+\t * handler, so skip the static write. PHYs running with PHY_POLL have no\n+\t * interrupt handler, so apply the static CDEN write as a baseline on\n+\t * every ethtool PLCA reconfiguration. The limitation is that autonomous\n+\t * PLCA mode transitions between ethtool reconfigurations are not\n+\t * tracked on such boards.\n+\t */\n+\tif (phydev-\u003eirq != PHY_POLL)\n+\t\treturn 0;\n+\n \tif (plca_cfg-\u003eenabled)\n \t\treturn phy_modify_mmd(phydev, MDIO_MMD_VEND2,\n \t\t\t\t      LAN86XX_REG_COL_DET_CTRL0,\n@@ -484,6 +506,18 @@ static int lan867x_revd0_config_init(struct phy_device *phydev)\n \t\t\treturn ret;\n \t}\n \n+\t/* AN1760: configure CCMFC to OA default so that the hardware\n+\t * automatically gates collision forwarding to the MAC based on\n+\t * PLCA_Status. Collisions are neither counted nor forwarded when\n+\t * PLCA_Status = OK, eliminating the need for software-driven CDEN\n+\t * toggling in the interrupt handler. CDEN remains enabled.\n+\t */\n+\tret = phy_modify_mmd(phydev, MDIO_MMD_VEND2, LAN86XX_REG_COL_DET_CTRL0,\n+\t\t\t     COL_DET_CTRL0_CCMFC_MASK,\n+\t\t\t     COL_DET_CTRL0_CCMFC_OA_DEFAULT);\n+\tif (ret)\n+\t\treturn ret;\n+\n \t/* Initially the PHY will be in CSMA/CD mode by default. So it is\n \t * required to set the link always active as it doesn't support\n \t * autoneg.\n@@ -506,6 +540,121 @@ static int lan86xx_read_status(struct phy_device *phydev)\n \treturn 0;\n }\n \n+static int lan86xx_config_intr(struct phy_device *phydev)\n+{\n+\tu16 mask = LAN86XX_STS1_PLCA_STS_CHANGED;\n+\tint ret;\n+\n+\tif (phydev-\u003ephy_id == PHY_ID_LAN867X_REVD0)\n+\t\tmask |= LAN86XX_STS1_LINK_STS_CHANGED;\n+\n+\tif (phydev-\u003einterrupts == PHY_INTERRUPT_ENABLED) {\n+\t\t/* Read to clear any pending status before enabling. */\n+\t\tret = phy_read_mmd(phydev, MDIO_MMD_VEND2, LAN86XX_REG_STS1);\n+\t\tif (ret \u003c 0)\n+\t\t\treturn ret;\n+\n+\t\t/* A mask bit of 0 enables the corresponding interrupt. */\n+\t\treturn phy_clear_bits_mmd(phydev, MDIO_MMD_VEND2,\n+\t\t\t\t\t  LAN86XX_REG_IMSK1, mask);\n+\t}\n+\n+\tret = phy_set_bits_mmd(phydev, MDIO_MMD_VEND2, LAN86XX_REG_IMSK1,\n+\t\t\t       mask);\n+\tif (ret)\n+\t\treturn ret;\n+\n+\t/* Read to clear any pending status after disabling. */\n+\tret = phy_read_mmd(phydev, MDIO_MMD_VEND2, LAN86XX_REG_STS1);\n+\tif (ret \u003c 0)\n+\t\treturn ret;\n+\n+\treturn 0;\n+}\n+\n+static irqreturn_t lan86xx_handle_interrupt(struct phy_device *phydev)\n+{\n+\tstruct phy_plca_status plca_st;\n+\tirqreturn_t ret_irq = IRQ_NONE;\n+\tint sts1, ret;\n+\n+\t/* Reading the status register clears the latched event bits. */\n+\tsts1 = phy_read_mmd(phydev, MDIO_MMD_VEND2, LAN86XX_REG_STS1);\n+\tif (sts1 \u003c 0) {\n+\t\tphy_error(phydev);\n+\t\treturn IRQ_NONE;\n+\t}\n+\n+\tif (sts1 \u0026 LAN86XX_STS1_PLCA_STS_CHANGED) {\n+\t\tret = genphy_c45_plca_get_status(phydev, \u0026plca_st);\n+\t\tif (ret \u003c 0) {\n+\t\t\tphy_error(phydev);\n+\t\t\treturn IRQ_NONE;\n+\t\t}\n+\n+\t\t/* AN1760/AN1699: disable collision detection in PLCA mode to\n+\t\t * improve signal quality; re-enable it in CSMA/CD mode.\n+\t\t *\n+\t\t * https://www.microchip.com/en-us/application-notes/an1760\n+\t\t * https://www.microchip.com/en-us/application-notes/an1699\n+\t\t */\n+\t\tret = phy_modify_mmd(phydev, MDIO_MMD_VEND2,\n+\t\t\t\t     LAN86XX_REG_COL_DET_CTRL0,\n+\t\t\t\t     COL_DET_CTRL0_ENABLE_BIT_MASK,\n+\t\t\t\t     plca_st.pst ? COL_DET_DISABLE :\n+\t\t\t\t     COL_DET_ENABLE);\n+\t\tif (ret \u003c 0) {\n+\t\t\tphy_error(phydev);\n+\t\t\treturn IRQ_NONE;\n+\t\t}\n+\n+\t\tret_irq = IRQ_HANDLED;\n+\t}\n+\n+\treturn ret_irq;\n+}\n+\n+static irqreturn_t lan867x_revd0_handle_interrupt(struct phy_device *phydev)\n+{\n+\tstruct phy_plca_status plca_st;\n+\tirqreturn_t ret_irq = IRQ_NONE;\n+\tint sts1, ret;\n+\n+\t/* Reading the status register clears the latched event bits. */\n+\tsts1 = phy_read_mmd(phydev, MDIO_MMD_VEND2, LAN86XX_REG_STS1);\n+\tif (sts1 \u003c 0) {\n+\t\tphy_error(phydev);\n+\t\treturn IRQ_NONE;\n+\t}\n+\n+\tif (sts1 \u0026 LAN86XX_STS1_LINK_STS_CHANGED) {\n+\t\tphy_trigger_machine(phydev);\n+\t\tret_irq = IRQ_HANDLED;\n+\t}\n+\n+\tif (sts1 \u0026 LAN86XX_STS1_PLCA_STS_CHANGED) {\n+\t\tret = genphy_c45_plca_get_status(phydev, \u0026plca_st);\n+\t\tif (ret \u003c 0) {\n+\t\t\tphy_error(phydev);\n+\t\t\treturn IRQ_NONE;\n+\t\t}\n+\n+\t\t/* Collision detection is handled autonomously by the hardware\n+\t\t * via CCMFC. Only the link status selection needs to be updated\n+\t\t * on each PLCA status transition.\n+\t\t */\n+\t\tret = lan867x_revd0_link_active_selection(phydev, plca_st.pst);\n+\t\tif (ret \u003c 0) {\n+\t\t\tphy_error(phydev);\n+\t\t\treturn IRQ_NONE;\n+\t\t}\n+\n+\t\tret_irq = IRQ_HANDLED;\n+\t}\n+\n+\treturn ret_irq;\n+}\n+\n static struct phy_driver microchip_t1s_driver[] = {\n \t{\n \t\tPHY_ID_MATCH_EXACT(PHY_ID_LAN867X_REVB1),\n@@ -513,6 +662,8 @@ static struct phy_driver microchip_t1s_driver[] = {\n \t\t.features           = PHY_BASIC_T1S_P2MP_FEATURES,\n \t\t.config_init        = lan867x_revb1_config_init,\n \t\t.read_status        = lan86xx_read_status,\n+\t\t.config_intr        = lan86xx_config_intr,\n+\t\t.handle_interrupt   = lan86xx_handle_interrupt,\n \t\t.get_plca_cfg\t    = genphy_c45_plca_get_cfg,\n \t\t.set_plca_cfg\t    = genphy_c45_plca_set_cfg,\n \t\t.get_plca_status    = genphy_c45_plca_get_status,\n@@ -523,6 +674,8 @@ static struct phy_driver microchip_t1s_driver[] = {\n \t\t.features           = PHY_BASIC_T1S_P2MP_FEATURES,\n \t\t.config_init        = lan867x_revc_config_init,\n \t\t.read_status        = lan86xx_read_status,\n+\t\t.config_intr        = lan86xx_config_intr,\n+\t\t.handle_interrupt   = lan86xx_handle_interrupt,\n \t\t.get_plca_cfg\t    = genphy_c45_plca_get_cfg,\n \t\t.set_plca_cfg\t    = lan86xx_plca_set_cfg,\n \t\t.get_plca_status    = genphy_c45_plca_get_status,\n@@ -533,6 +686,8 @@ static struct phy_driver microchip_t1s_driver[] = {\n \t\t.features           = PHY_BASIC_T1S_P2MP_FEATURES,\n \t\t.config_init        = lan867x_revc_config_init,\n \t\t.read_status        = lan86xx_read_status,\n+\t\t.config_intr        = lan86xx_config_intr,\n+\t\t.handle_interrupt   = lan86xx_handle_interrupt,\n \t\t.get_plca_cfg\t    = genphy_c45_plca_get_cfg,\n \t\t.set_plca_cfg\t    = lan86xx_plca_set_cfg,\n \t\t.get_plca_status    = genphy_c45_plca_get_status,\n@@ -542,6 +697,8 @@ static struct phy_driver microchip_t1s_driver[] = {\n \t\t.name               = \"LAN867X Rev.D0\",\n \t\t.features           = PHY_BASIC_T1S_P2MP_FEATURES,\n \t\t.config_init        = lan867x_revd0_config_init,\n+\t\t.config_intr        = lan86xx_config_intr,\n+\t\t.handle_interrupt   = lan867x_revd0_handle_interrupt,\n \t\t.get_plca_cfg\t    = genphy_c45_plca_get_cfg,\n \t\t.set_plca_cfg\t    = lan86xx_plca_set_cfg,\n \t\t.get_plca_status    = genphy_c45_plca_get_status,\n@@ -556,6 +713,8 @@ static struct phy_driver microchip_t1s_driver[] = {\n \t\t.features           = PHY_BASIC_T1S_P2MP_FEATURES,\n \t\t.config_init        = lan865x_revb_config_init,\n \t\t.read_status        = lan86xx_read_status,\n+\t\t.config_intr        = lan86xx_config_intr,\n+\t\t.handle_interrupt   = lan86xx_handle_interrupt,\n \t\t.read_mmd           = genphy_read_mmd_c45,\n \t\t.write_mmd          = genphy_write_mmd_c45,\n \t\t.get_plca_cfg\t    = genphy_c45_plca_get_cfg,\ndiff --git a/include/linux/oa_tc6.h b/include/linux/oa_tc6.h\nindex 27f652d4920b2..1c8cc263c5e53 100644\n--- a/include/linux/oa_tc6.h\n+++ b/include/linux/oa_tc6.h\n@@ -30,6 +30,7 @@\n \n /* Status Register #0 */\n #define OA_TC6_REG_STATUS0\t\t\t0x0008\n+#define OA_TC6_STATUS0_PHY_INT\t\t\tBIT(7)\n #define OA_TC6_STATUS0_RESETC\t\t\tBIT(6)\t/* Reset Complete */\n #define OA_TC6_STATUS0_HEADER_ERROR\t\tBIT(5)\n #define OA_TC6_STATUS0_LOSS_OF_FRAME_ERROR\tBIT(4)\n@@ -43,6 +44,7 @@\n \n /* Interrupt Mask Register #0 */\n #define OA_TC6_REG_INT_MASK0\t\t\t\t0x000C\n+#define OA_TC6_INT_MASK0_PHY_INT_MASK\t\t\tBIT(7)\n #define OA_TC6_INT_MASK0_HEADER_ERR_MASK\t\tBIT(5)\n #define OA_TC6_INT_MASK0_LOSS_OF_FRAME_ERR_MASK\t\tBIT(4)\n #define OA_TC6_INT_MASK0_RX_BUFFER_OVERFLOW_ERR_MASK\tBIT(3)\n@@ -68,6 +70,7 @@ struct oa_tc6;\n \n enum oa_tc6_quirk_flag {\n \tOA_TC6_BROKEN_PHY = BIT(0),\n+\tOA_TC6_PHY_INT    = BIT(1),\n };\n \n struct oa_tc6_quirks {\n"
}

{
  "EnableConfigs": null,
  "FocusSymbols": [],
  "Reasoning": "The patch modifies the Microchip LAN865x SPI Ethernet driver (drivers/net/ethernet/microchip/lan865x/lan865x.c), the Open Alliance TC6 MAC-PHY protocol layer (drivers/net/ethernet/oa_tc6.c), and the Microchip 10BASE-T1S PHY driver (drivers/net/phy/microchip_t1s.c). These drivers operate on specific physical 10BASE-T1S single-pair Ethernet hardware connected over SPI/MDIO that is not emulated in standard QEMU/GCE virtualized fuzzing environments, making the modified code structurally unreachable.",
  "WorthFuzzing": false
}

You are an expert Linux kernel maintainer and security engineer.
Your job is to review a provided patch series and evaluate whether it warrants fuzzing with syzkaller.

IMPORTANT: The changes have ALREADY been applied and committed as the HEAD commit in
your workspace. Do NOT rely on internal assumptions. You must actively use your code access
tools to inspect the actual source code, callers, and surrounding context.

================================================================================
1. CORE TRIAGE PHILOSOPHY
================================================================================
The goal of patch fuzzing is to discover crashes, regressions, exposed latent bugs,
and newly triggered assertions introduced by the patch series.

- REACHABILITY IS THE PRIMARY GATE:
  Fuzzing can only discover bugs in code that can actually execute in standard virtualized
  environments (GCE or QEMU, utilizing software-emulated devices like USB gadgets, netdev, tun/tap).
  If the modified code is structurally unreachable (see Section 2), it MUST NOT be fuzzed,
  regardless of whether it adds assertions or complex logic.

- DO NOT BLINDLY TRUST "NO FUNCTIONAL CHANGE" (NFCI) OR "REFACTORING" CLAIMS:
  Patch authors routinely label changes as "cleanups", "refactorings", or state
  "No functional change intended". Do NOT take these claims at face value.
  Code refactorings that rearrange logic, introduce helper functions, or alter state management
  in core subsystems frequently introduce subtle semantic shifts or uncover latent kernel bugs.
  If reachable executable code is modified or refactored, it MUST be fuzzed.

- NEW OR MODIFIED ASSERTIONS IN REACHABLE CODE MUST BE FUZZED:
  When a patch introduces or modifies runtime checks or assertions (e.g., WARN_ON*, VM_WARN_ON*,
  BUG_ON*, lockdep_assert*) in reachable code paths, it enforces new or stricter invariants.
  Even if the author believes the invariant always holds, fuzzing is essential to verify whether
  an unusual sequence of operations can violate it.

================================================================================
2. WHEN TO RETURN WorthFuzzing=false (NEGATIVE CRITERIA)
================================================================================
Return WorthFuzzing=false ONLY IF all modified code falls strictly into one or more of these categories:

- Non-kernel and non-executable changes:
  * Modifications to Documentation/, comments, or spelling fixes.
  * User-space directories, self-tests, samples, or scripts (e.g., tools/, samples/, scripts/, usr/)
    that do not affect the compiled kernel image (vmlinux) or kernel modules.
  * Purely decorative logging (e.g., message strings in pr_err, printk, dev_info) or tracepoints
    that do not alter control flow or data structures.
  * Build system or Kconfig changes that do not alter compiled C logic.
- Structurally unreachable hardware:
  * Vendor-specific PCIe switches, SmartNICs, or GPU drivers (e.g., mlxsw, pds_core, qed,
    ionic, amdgpu) requiring physical ASIC/PCIe cards not emulated in standard QEMU.
- Unreachable execution paths:
  * Driver teardown callbacks (.remove, .shutdown, pci_unregister_driver) executed only during
    physical PCI hot-unplug or manual sysfs driver unbinding.
  * Code paths exclusive to architectures other than the target architecture.

================================================================================
3. WHEN TO RETURN WorthFuzzing=true (POSITIVE CRITERIA)
================================================================================
Return WorthFuzzing=true whenever the patch touches reachable executable code, including:
- Core Subsystems:
  * Any logic modifications in memory management (mm/), synchronization/locking (kernel/locking/),
    BPF, scheduler, core networking, VFS, or syscall handling.
- Refactorings and Code Cleanups:
  * Any restructuring of reachable data structures, helper abstractions, or algorithm flows.
- Runtime Assertions and Defensive Checks:
  * Any introduction or alteration of assertions (WARN_ON*, VM_WARN_ON*, BUG_ON*, etc.) in reachable paths.
- Reachable Drivers and Protocols:
  * Drivers accessible via virtual buses (virtio, USB gadget, loopback, netlink, binder, sockets, etc.).

================================================================================
4. EXTRACTING FocusSymbols (PREVENTING DILUTION)
================================================================================
When WorthFuzzing=true, you must extract specific kernel functions into FocusSymbols to guide the fuzzer:

- AVOID UBIQUITOUS LIFECYCLE HOT-PATHS:
  Do NOT list generic, ubiquitous functions called by almost every program in the corpus
  (including, but not limited to: general memory allocators and deallocators, page fault
  and trap handlers, or core synchronization primitives; this is not an exhaustive list).
  Listing ubiquitous functions causes the fuzzer to classify thousands of unrelated tests as "focused",
  which severely dilutes fuzzing effort away from the actual changes.

- TARGET SPECIFIC FEATURE LOGIC AND ENTRYPOINTS:
  List functions that specifically implement the logic being added or altered, or direct API entrypoints
  for the subsystem feature under review.

- HANDLING STATIC INLINE FUNCTIONS IN HEADERS (.h):
  Compiler-inlined static functions (such as static inlines in mm/*.h or include/linux/*.h) lack
  distinct symbol addresses in vmlinux and cannot be targeted directly by symbol coverage filters.
  If the changes are primarily in static inline helpers, identify non-static, feature-specific caller
  functions in .c files that exercise them (avoiding ubiquitous lifecycle wrappers).

================================================================================
5. IDENTIFYING EnableConfigs
================================================================================
Identify any specific CONFIG_ options required to properly compile and reach the modified code:
- Inspect Kconfig files and #ifdef guards; do not make assumptions.
- Check "depends on" lines in Kconfig to include any non-standard parent subsystem configs needed.
- Strip any 'CONFIG_' prefix (e.g., return "NET_IPV4" instead of "CONFIG_NET_IPV4").
Prefer calling several tools at the same time to save round-trips.


Use set-results tool to provide results of the analysis.
It must be called exactly once before the final reply.
Ignore results of this tool.

Target architecture: amd64

For your convenience, here is the diff of the changes:
commit 44bc1c37f7e866eb997d8878a5f6e7f7050b7d1f
Author: syz-cluster <triage@syzkaller.com>
Date:   Mon Sep 7 08:22:04 2026 +0000

    syz-cluster: applied patch under review

diff --git a/drivers/net/ethernet/microchip/lan865x/lan865x.c b/drivers/net/ethernet/microchip/lan865x/lan865x.c
index 26a2761332a5a..043a3dc3f9657 100644
--- a/drivers/net/ethernet/microchip/lan865x/lan865x.c
+++ b/drivers/net/ethernet/microchip/lan865x/lan865x.c
@@ -332,6 +332,7 @@ static const struct net_device_ops lan865x_netdev_ops = {
 
 static int lan865x_probe(struct spi_device *spi)
 {
+	struct oa_tc6_quirks tc6_quirks = {};
 	struct net_device *netdev;
 	struct lan865x_priv *priv;
 	int ret;
@@ -346,7 +347,8 @@ static int lan865x_probe(struct spi_device *spi)
 	spi_set_drvdata(spi, priv);
 	INIT_WORK(&priv->multicast_work, lan865x_multicast_work_handler);
 
-	priv->tc6 = oa_tc6_init(spi, netdev, NULL);
+	tc6_quirks.quirk_flags = OA_TC6_PHY_INT;
+	priv->tc6 = oa_tc6_init(spi, netdev, &tc6_quirks);
 	if (!priv->tc6) {
 		ret = -ENODEV;
 		goto free_netdev;
diff --git a/drivers/net/ethernet/oa_tc6.c b/drivers/net/ethernet/oa_tc6.c
index 6fcc5f561d560..00b0176c1fe7a 100644
--- a/drivers/net/ethernet/oa_tc6.c
+++ b/drivers/net/ethernet/oa_tc6.c
@@ -8,6 +8,8 @@
 #include <linux/bitfield.h>
 #include <linux/iopoll.h>
 #include <linux/interrupt.h>
+#include <linux/irq.h>
+#include <linux/irqdomain.h>
 #include <linux/mdio.h>
 #include <linux/phy.h>
 #include <linux/oa_tc6.h>
@@ -70,6 +72,8 @@ struct oa_tc6 {
 	struct phy_device *phydev;
 	struct mii_bus *mdiobus;
 	struct spi_device *spi;
+	struct irq_domain *phy_irq_domain;
+	int phy_virq;
 	struct mutex spi_ctrl_lock; /* Protects spi control transfer */
 	spinlock_t tx_skb_lock; /* Protects tx skb handling */
 	void *spi_ctrl_tx_buf;
@@ -528,6 +532,44 @@ int oa_tc6_mdiobus_write_c45(struct mii_bus *bus, int addr, int devnum,
 }
 EXPORT_SYMBOL_GPL(oa_tc6_mdiobus_write_c45);
 
+static int oa_tc6_phy_irq_map(struct irq_domain *domain, unsigned int irq,
+			      irq_hw_number_t hwirq)
+{
+	irq_set_chip_data(irq, domain->host_data);
+	irq_set_chip_and_handler(irq, &dummy_irq_chip, handle_simple_irq);
+	irq_set_nested_thread(irq, true);
+	irq_set_noprobe(irq);
+
+	return 0;
+}
+
+static const struct irq_domain_ops oa_tc6_phy_irq_domain_ops = {
+	.map = oa_tc6_phy_irq_map,
+};
+
+static int oa_tc6_phy_irq_setup(struct oa_tc6 *tc6)
+{
+	tc6->phy_irq_domain =
+		irq_domain_create_linear(NULL, 1,
+					 &oa_tc6_phy_irq_domain_ops, tc6);
+	if (!tc6->phy_irq_domain)
+		return -ENOMEM;
+
+	tc6->phy_virq = irq_create_mapping(tc6->phy_irq_domain, 0);
+	if (!tc6->phy_virq) {
+		irq_domain_remove(tc6->phy_irq_domain);
+		return -ENOMEM;
+	}
+
+	return 0;
+}
+
+static void oa_tc6_phy_irq_teardown(struct oa_tc6 *tc6)
+{
+	irq_dispose_mapping(tc6->phy_virq);
+	irq_domain_remove(tc6->phy_irq_domain);
+}
+
 static int oa_tc6_mdiobus_register(struct oa_tc6 *tc6)
 {
 	int ret;
@@ -559,9 +601,25 @@ static int oa_tc6_mdiobus_register(struct oa_tc6 *tc6)
 	snprintf(tc6->mdiobus->id, ARRAY_SIZE(tc6->mdiobus->id), "%s",
 		 dev_name(&tc6->spi->dev));
 
+	if (tc6->quirk_flags & OA_TC6_PHY_INT) {
+		ret = oa_tc6_phy_irq_setup(tc6);
+		if (ret) {
+			mdiobus_free(tc6->mdiobus);
+			return ret;
+		}
+		/* Populate all irq[] entries before registration so
+		 * phy_device_create() picks up the virtual IRQ regardless of
+		 * the PHY's MDIO address.
+		 */
+		for (int i = 0; i < PHY_MAX_ADDR; i++)
+			tc6->mdiobus->irq[i] = tc6->phy_virq;
+	}
+
 	ret = mdiobus_register(tc6->mdiobus);
 	if (ret) {
 		netdev_err(tc6->netdev, "Could not register MDIO bus\n");
+		if (tc6->quirk_flags & OA_TC6_PHY_INT)
+			oa_tc6_phy_irq_teardown(tc6);
 		mdiobus_free(tc6->mdiobus);
 		return ret;
 	}
@@ -572,6 +630,8 @@ static int oa_tc6_mdiobus_register(struct oa_tc6 *tc6)
 static void oa_tc6_mdiobus_unregister(struct oa_tc6 *tc6)
 {
 	mdiobus_unregister(tc6->mdiobus);
+	if (tc6->quirk_flags & OA_TC6_PHY_INT)
+		oa_tc6_phy_irq_teardown(tc6);
 	mdiobus_free(tc6->mdiobus);
 }
 
@@ -661,7 +721,7 @@ static int oa_tc6_sw_reset_macphy(struct oa_tc6 *tc6)
 	return oa_tc6_write_register(tc6, OA_TC6_REG_STATUS0, regval);
 }
 
-static int oa_tc6_unmask_macphy_error_interrupts(struct oa_tc6 *tc6)
+static int oa_tc6_unmask_interrupts(struct oa_tc6 *tc6)
 {
 	u32 regval;
 	int ret;
@@ -670,7 +730,8 @@ static int oa_tc6_unmask_macphy_error_interrupts(struct oa_tc6 *tc6)
 	if (ret)
 		return ret;
 
-	regval &= ~(OA_TC6_INT_MASK0_TX_PROTOCOL_ERR_MASK |
+	regval &= ~(OA_TC6_INT_MASK0_PHY_INT_MASK |
+		    OA_TC6_INT_MASK0_TX_PROTOCOL_ERR_MASK |
 		    OA_TC6_INT_MASK0_RX_BUFFER_OVERFLOW_ERR_MASK |
 		    OA_TC6_INT_MASK0_LOSS_OF_FRAME_ERR_MASK |
 		    OA_TC6_INT_MASK0_HEADER_ERR_MASK);
@@ -810,6 +871,15 @@ static int oa_tc6_process_extended_status(struct oa_tc6 *tc6)
 		return ret;
 	}
 
+	/* Dispatch the PHY interrupt to phylib via the nested virtual IRQ so
+	 * the PHY driver reads and acknowledges its status. PHYINT is level
+	 * triggered, so doing this synchronously here (in the sleepable
+	 * threaded IRQ) clears the source before the next data chunk.
+	 */
+	if ((tc6->quirk_flags & OA_TC6_PHY_INT) &&
+	    FIELD_GET(OA_TC6_STATUS0_PHY_INT, value))
+		handle_nested_irq(tc6->phy_virq);
+
 	if (FIELD_GET(OA_TC6_STATUS0_RX_BUFFER_OVERFLOW_ERROR, value)) {
 		oa_tc6_look_for_new_frame(tc6);
 		net_err_ratelimited("%s: Receive buffer overflow error\n",
@@ -1518,7 +1588,7 @@ struct oa_tc6 *oa_tc6_init(struct spi_device *spi, struct net_device *netdev,
 		return NULL;
 	}
 
-	ret = oa_tc6_unmask_macphy_error_interrupts(tc6);
+	ret = oa_tc6_unmask_interrupts(tc6);
 	if (ret) {
 		dev_err(&tc6->spi->dev,
 			"MAC-PHY error interrupts unmask failed: %d\n", ret);
diff --git a/drivers/net/phy/microchip_t1s.c b/drivers/net/phy/microchip_t1s.c
index 73c23d311d72a..c3a738c7425bf 100644
--- a/drivers/net/phy/microchip_t1s.c
+++ b/drivers/net/phy/microchip_t1s.c
@@ -27,11 +27,23 @@
 #define LAN865X_REG_CFGPARAM_CTRL 0x00DA
 #define LAN865X_REG_STS2 0x0019
 
+/* PHY interrupt status and mask registers (MDIO_MMD_VEND2). The status bits
+ * are read-to-clear; a mask bit is enabled by writing 0.
+ */
+#define LAN86XX_REG_STS1		0x0018
+#define LAN86XX_REG_IMSK1		0x001C
+
+#define LAN86XX_STS1_LINK_STS_CHANGED	BIT(13)
+#define LAN86XX_STS1_PLCA_STS_CHANGED	BIT(11)
+
 /* Collision Detector Control 0 Register */
 #define LAN86XX_REG_COL_DET_CTRL0	0x0087
 #define COL_DET_CTRL0_ENABLE_BIT_MASK	BIT(15)
 #define COL_DET_ENABLE			BIT(15)
 #define COL_DET_DISABLE			0x0000
+#define COL_DET_CTRL0_CCMFC_MASK	GENMASK(10, 9)
+/* OA default: collisions gated by PLCA_Status in hardware */
+#define COL_DET_CTRL0_CCMFC_OA_DEFAULT	BIT(9)
 
 /* LAN8670/1/2 Rev.D0 Link Status Selection Register */
 #define LAN867X_REG_LINK_STATUS_CTRL	0x0012
@@ -458,6 +470,16 @@ static int lan86xx_plca_set_cfg(struct phy_device *phydev,
 	if (ret)
 		return ret;
 
+	/* PHYs with routed interrupts handle CDEN dynamically via the interrupt
+	 * handler, so skip the static write. PHYs running with PHY_POLL have no
+	 * interrupt handler, so apply the static CDEN write as a baseline on
+	 * every ethtool PLCA reconfiguration. The limitation is that autonomous
+	 * PLCA mode transitions between ethtool reconfigurations are not
+	 * tracked on such boards.
+	 */
+	if (phydev->irq != PHY_POLL)
+		return 0;
+
 	if (plca_cfg->enabled)
 		return phy_modify_mmd(phydev, MDIO_MMD_VEND2,
 				      LAN86XX_REG_COL_DET_CTRL0,
@@ -484,6 +506,18 @@ static int lan867x_revd0_config_init(struct phy_device *phydev)
 			return ret;
 	}
 
+	/* AN1760: configure CCMFC to OA default so that the hardware
+	 * automatically gates collision forwarding to the MAC based on
+	 * PLCA_Status. Collisions are neither counted nor forwarded when
+	 * PLCA_Status = OK, eliminating the need for software-driven CDEN
+	 * toggling in the interrupt handler. CDEN remains enabled.
+	 */
+	ret = phy_modify_mmd(phydev, MDIO_MMD_VEND2, LAN86XX_REG_COL_DET_CTRL0,
+			     COL_DET_CTRL0_CCMFC_MASK,
+			     COL_DET_CTRL0_CCMFC_OA_DEFAULT);
+	if (ret)
+		return ret;
+
 	/* Initially the PHY will be in CSMA/CD mode by default. So it is
 	 * required to set the link always active as it doesn't support
 	 * autoneg.
@@ -506,6 +540,121 @@ static int lan86xx_read_status(struct phy_device *phydev)
 	return 0;
 }
 
+static int lan86xx_config_intr(struct phy_device *phydev)
+{
+	u16 mask = LAN86XX_STS1_PLCA_STS_CHANGED;
+	int ret;
+
+	if (phydev->phy_id == PHY_ID_LAN867X_REVD0)
+		mask |= LAN86XX_STS1_LINK_STS_CHANGED;
+
+	if (phydev->interrupts == PHY_INTERRUPT_ENABLED) {
+		/* Read to clear any pending status before enabling. */
+		ret = phy_read_mmd(phydev, MDIO_MMD_VEND2, LAN86XX_REG_STS1);
+		if (ret < 0)
+			return ret;
+
+		/* A mask bit of 0 enables the corresponding interrupt. */
+		return phy_clear_bits_mmd(phydev, MDIO_MMD_VEND2,
+					  LAN86XX_REG_IMSK1, mask);
+	}
+
+	ret = phy_set_bits_mmd(phydev, MDIO_MMD_VEND2, LAN86XX_REG_IMSK1,
+			       mask);
+	if (ret)
+		return ret;
+
+	/* Read to clear any pending status after disabling. */
+	ret = phy_read_mmd(phydev, MDIO_MMD_VEND2, LAN86XX_REG_STS1);
+	if (ret < 0)
+		return ret;
+
+	return 0;
+}
+
+static irqreturn_t lan86xx_handle_interrupt(struct phy_device *phydev)
+{
+	struct phy_plca_status plca_st;
+	irqreturn_t ret_irq = IRQ_NONE;
+	int sts1, ret;
+
+	/* Reading the status register clears the latched event bits. */
+	sts1 = phy_read_mmd(phydev, MDIO_MMD_VEND2, LAN86XX_REG_STS1);
+	if (sts1 < 0) {
+		phy_error(phydev);
+		return IRQ_NONE;
+	}
+
+	if (sts1 & LAN86XX_STS1_PLCA_STS_CHANGED) {
+		ret = genphy_c45_plca_get_status(phydev, &plca_st);
+		if (ret < 0) {
+			phy_error(phydev);
+			return IRQ_NONE;
+		}
+
+		/* AN1760/AN1699: disable collision detection in PLCA mode to
+		 * improve signal quality; re-enable it in CSMA/CD mode.
+		 *
+		 * https://www.microchip.com/en-us/application-notes/an1760
+		 * https://www.microchip.com/en-us/application-notes/an1699
+		 */
+		ret = phy_modify_mmd(phydev, MDIO_MMD_VEND2,
+				     LAN86XX_REG_COL_DET_CTRL0,
+				     COL_DET_CTRL0_ENABLE_BIT_MASK,
+				     plca_st.pst ? COL_DET_DISABLE :
+				     COL_DET_ENABLE);
+		if (ret < 0) {
+			phy_error(phydev);
+			return IRQ_NONE;
+		}
+
+		ret_irq = IRQ_HANDLED;
+	}
+
+	return ret_irq;
+}
+
+static irqreturn_t lan867x_revd0_handle_interrupt(struct phy_device *phydev)
+{
+	struct phy_plca_status plca_st;
+	irqreturn_t ret_irq = IRQ_NONE;
+	int sts1, ret;
+
+	/* Reading the status register clears the latched event bits. */
+	sts1 = phy_read_mmd(phydev, MDIO_MMD_VEND2, LAN86XX_REG_STS1);
+	if (sts1 < 0) {
+		phy_error(phydev);
+		return IRQ_NONE;
+	}
+
+	if (sts1 & LAN86XX_STS1_LINK_STS_CHANGED) {
+		phy_trigger_machine(phydev);
+		ret_irq = IRQ_HANDLED;
+	}
+
+	if (sts1 & LAN86XX_STS1_PLCA_STS_CHANGED) {
+		ret = genphy_c45_plca_get_status(phydev, &plca_st);
+		if (ret < 0) {
+			phy_error(phydev);
+			return IRQ_NONE;
+		}
+
+		/* Collision detection is handled autonomously by the hardware
+		 * via CCMFC. Only the link status selection needs to be updated
+		 * on each PLCA status transition.
+		 */
+		ret = lan867x_revd0_link_active_selection(phydev, plca_st.pst);
+		if (ret < 0) {
+			phy_error(phydev);
+			return IRQ_NONE;
+		}
+
+		ret_irq = IRQ_HANDLED;
+	}
+
+	return ret_irq;
+}
+
 static struct phy_driver microchip_t1s_driver[] = {
 	{
 		PHY_ID_MATCH_EXACT(PHY_ID_LAN867X_REVB1),
@@ -513,6 +662,8 @@ static struct phy_driver microchip_t1s_driver[] = {
 		.features           = PHY_BASIC_T1S_P2MP_FEATURES,
 		.config_init        = lan867x_revb1_config_init,
 		.read_status        = lan86xx_read_status,
+		.config_intr        = lan86xx_config_intr,
+		.handle_interrupt   = lan86xx_handle_interrupt,
 		.get_plca_cfg	    = genphy_c45_plca_get_cfg,
 		.set_plca_cfg	    = genphy_c45_plca_set_cfg,
 		.get_plca_status    = genphy_c45_plca_get_status,
@@ -523,6 +674,8 @@ static struct phy_driver microchip_t1s_driver[] = {
 		.features           = PHY_BASIC_T1S_P2MP_FEATURES,
 		.config_init        = lan867x_revc_config_init,
 		.read_status        = lan86xx_read_status,
+		.config_intr        = lan86xx_config_intr,
+		.handle_interrupt   = lan86xx_handle_interrupt,
 		.get_plca_cfg	    = genphy_c45_plca_get_cfg,
 		.set_plca_cfg	    = lan86xx_plca_set_cfg,
 		.get_plca_status    = genphy_c45_plca_get_status,
@@ -533,6 +686,8 @@ static struct phy_driver microchip_t1s_driver[] = {
 		.features           = PHY_BASIC_T1S_P2MP_FEATURES,
 		.config_init        = lan867x_revc_config_init,
 		.read_status        = lan86xx_read_status,
+		.config_intr        = lan86xx_config_intr,
+		.handle_interrupt   = lan86xx_handle_interrupt,
 		.get_plca_cfg	    = genphy_c45_plca_get_cfg,
 		.set_plca_cfg	    = lan86xx_plca_set_cfg,
 		.get_plca_status    = genphy_c45_plca_get_status,
@@ -542,6 +697,8 @@ static struct phy_driver microchip_t1s_driver[] = {
 		.name               = "LAN867X Rev.D0",
 		.features           = PHY_BASIC_T1S_P2MP_FEATURES,
 		.config_init        = lan867x_revd0_config_init,
+		.config_intr        = lan86xx_config_intr,
+		.handle_interrupt   = lan867x_revd0_handle_interrupt,
 		.get_plca_cfg	    = genphy_c45_plca_get_cfg,
 		.set_plca_cfg	    = lan86xx_plca_set_cfg,
 		.get_plca_status    = genphy_c45_plca_get_status,
@@ -556,6 +713,8 @@ static struct phy_driver microchip_t1s_driver[] = {
 		.features           = PHY_BASIC_T1S_P2MP_FEATURES,
 		.config_init        = lan865x_revb_config_init,
 		.read_status        = lan86xx_read_status,
+		.config_intr        = lan86xx_config_intr,
+		.handle_interrupt   = lan86xx_handle_interrupt,
 		.read_mmd           = genphy_read_mmd_c45,
 		.write_mmd          = genphy_write_mmd_c45,
 		.get_plca_cfg	    = genphy_c45_plca_get_cfg,
diff --git a/include/linux/oa_tc6.h b/include/linux/oa_tc6.h
index 27f652d4920b2..1c8cc263c5e53 100644
--- a/include/linux/oa_tc6.h
+++ b/include/linux/oa_tc6.h
@@ -30,6 +30,7 @@
 
 /* Status Register #0 */
 #define OA_TC6_REG_STATUS0			0x0008
+#define OA_TC6_STATUS0_PHY_INT			BIT(7)
 #define OA_TC6_STATUS0_RESETC			BIT(6)	/* Reset Complete */
 #define OA_TC6_STATUS0_HEADER_ERROR		BIT(5)
 #define OA_TC6_STATUS0_LOSS_OF_FRAME_ERROR	BIT(4)
@@ -43,6 +44,7 @@
 
 /* Interrupt Mask Register #0 */
 #define OA_TC6_REG_INT_MASK0				0x000C
+#define OA_TC6_INT_MASK0_PHY_INT_MASK			BIT(7)
 #define OA_TC6_INT_MASK0_HEADER_ERR_MASK		BIT(5)
 #define OA_TC6_INT_MASK0_LOSS_OF_FRAME_ERR_MASK		BIT(4)
 #define OA_TC6_INT_MASK0_RX_BUFFER_OVERFLOW_ERR_MASK	BIT(3)
@@ -68,6 +70,7 @@ struct oa_tc6;
 
 enum oa_tc6_quirk_flag {
 	OA_TC6_BROKEN_PHY = BIT(0),
+	OA_TC6_PHY_INT    = BIT(1),
 };
 
 struct oa_tc6_quirks {

							input: 9156
							output: 28
							thoughts: 333

**Fuzzing Feasibility Analysis**

Okay, let's take a look at this patch and decide if fuzzing it is a worthwhile endeavor. My immediate thought is to understand the scope of the code modifications. I see changes in `drivers/net/ethernet/microchip/lan865x/lan865x.c`, `drivers/net/ethernet/oa_tc6.c`, `drivers/net/phy/microchip_t1s.c`, and `include/linux/oa_tc6.h`. Time to quickly identify what we're dealing with.

Ah, `lan865x` is a SPI Ethernet controller from Microchip, specifically the LAN8650/1 10BASE-T1S MAC-PHY. `oa_tc6` is the Open Alliance TC6 10BASE-T1S MAC-PHY protocol driver, also operating over SPI, it looks like. And `microchip_t1s` is a PHY driver for Microchip's LAN867x/LAN865x 10BASE-T1S PHYs.

Now, the crucial question: can we reach these drivers in a standard fuzzing environment, like QEMU or GCE x86_64, without needing actual physical hardware? My gut feeling tells me this might be tricky, because of the SPI interaction. It's likely that SPI devices and PHY devices get instantiated in a specific way, potentially relying on a device tree or specific physical SPI hardware. Let's see if there is a virtual bus or emulated device that we can leverage.

So, let's fire up my preferred tools and search the kernel tree for `lan865x`, `oa_tc6`, and `microchip_t1s`. This should give us some critical insight into how these drivers are initialized and used. From there, we can then determine the feasibility of fuzzing.

{
  "Expression": "lan865x",
  "PathPrefix": "drivers/net"
}

{
  "Output": "drivers/net/ethernet/microchip/Kconfig=45=config LAN743X\n--\ndrivers/net/ethernet/microchip/Kconfig-59-\ndrivers/net/ethernet/microchip/Kconfig:60:source \"drivers/net/ethernet/microchip/lan865x/Kconfig\"\ndrivers/net/ethernet/microchip/Kconfig-61-source \"drivers/net/ethernet/microchip/lan966x/Kconfig\"\n--\ndrivers/net/ethernet/microchip/Makefile=10=lan743x-objs := lan743x_main.o lan743x_ethtool.o lan743x_ptp.o\ndrivers/net/ethernet/microchip/Makefile-11-\ndrivers/net/ethernet/microchip/Makefile:12:obj-$(CONFIG_LAN865X) += lan865x/\ndrivers/net/ethernet/microchip/Makefile-13-obj-$(CONFIG_LAN966X_SWITCH) += lan966x/\n--\ndrivers/net/ethernet/microchip/lan865x/Kconfig=8=config LAN865X\n--\ndrivers/net/ethernet/microchip/lan865x/Kconfig-16-\t  To compile this driver as a module, choose M here. The module will be\ndrivers/net/ethernet/microchip/lan865x/Kconfig:17:\t  called lan865x.\ndrivers/net/ethernet/microchip/lan865x/Kconfig-18-\n--\ndrivers/net/ethernet/microchip/lan865x/Makefile-5-\ndrivers/net/ethernet/microchip/lan865x/Makefile:6:obj-$(CONFIG_LAN865X) += lan865x.o\n--\ndrivers/net/ethernet/microchip/lan865x/lan865x.c-38-\ndrivers/net/ethernet/microchip/lan865x/lan865x.c:39:struct lan865x_priv {\ndrivers/net/ethernet/microchip/lan865x/lan865x.c-40-\tstruct work_struct multicast_work;\n--\ndrivers/net/ethernet/microchip/lan865x/lan865x.c-45-\ndrivers/net/ethernet/microchip/lan865x/lan865x.c:46:static int lan865x_set_hw_macaddr_low_bytes(struct oa_tc6 *tc6, const u8 *mac)\ndrivers/net/ethernet/microchip/lan865x/lan865x.c-47-{\n--\ndrivers/net/ethernet/microchip/lan865x/lan865x.c-54-\ndrivers/net/ethernet/microchip/lan865x/lan865x.c:55:static int lan865x_set_hw_macaddr(struct lan865x_priv *priv, const u8 *mac)\ndrivers/net/ethernet/microchip/lan865x/lan865x.c-56-{\n--\ndrivers/net/ethernet/microchip/lan865x/lan865x.c-61-\t/* Configure MAC address low bytes */\ndrivers/net/ethernet/microchip/lan865x/lan865x.c:62:\tret = lan865x_set_hw_macaddr_low_bytes(priv-\u003etc6, mac);\ndrivers/net/ethernet/microchip/lan865x/lan865x.c-63-\tif (ret)\n--\ndrivers/net/ethernet/microchip/lan865x/lan865x.c-75-\t */\ndrivers/net/ethernet/microchip/lan865x/lan865x.c:76:\trestore_ret = lan865x_set_hw_macaddr_low_bytes(priv-\u003etc6,\ndrivers/net/ethernet/microchip/lan865x/lan865x.c-77-\t\t\t\t\t\t       priv-\u003enetdev-\u003edev_addr);\n--\ndrivers/net/ethernet/microchip/lan865x/lan865x.c-83-\ndrivers/net/ethernet/microchip/lan865x/lan865x.c:84:static const struct ethtool_ops lan865x_ethtool_ops = {\ndrivers/net/ethernet/microchip/lan865x/lan865x.c-85-\t.get_link_ksettings = phy_ethtool_get_link_ksettings,\n--\ndrivers/net/ethernet/microchip/lan865x/lan865x.c-88-\ndrivers/net/ethernet/microchip/lan865x/lan865x.c:89:static int lan865x_set_mac_address(struct net_device *netdev, void *addr)\ndrivers/net/ethernet/microchip/lan865x/lan865x.c-90-{\ndrivers/net/ethernet/microchip/lan865x/lan865x.c:91:\tstruct lan865x_priv *priv = netdev_priv(netdev);\ndrivers/net/ethernet/microchip/lan865x/lan865x.c-92-\tstruct sockaddr *address = addr;\n--\ndrivers/net/ethernet/microchip/lan865x/lan865x.c-101-\ndrivers/net/ethernet/microchip/lan865x/lan865x.c:102:\tret = lan865x_set_hw_macaddr(priv, address-\u003esa_data);\ndrivers/net/ethernet/microchip/lan865x/lan865x.c-103-\tif (ret)\n--\ndrivers/net/ethernet/microchip/lan865x/lan865x.c=111=static u32 get_address_bit(u8 addr[ETH_ALEN], u32 bit)\n--\ndrivers/net/ethernet/microchip/lan865x/lan865x.c-115-\ndrivers/net/ethernet/microchip/lan865x/lan865x.c:116:static u32 lan865x_hash(u8 addr[ETH_ALEN])\ndrivers/net/ethernet/microchip/lan865x/lan865x.c-117-{\n--\ndrivers/net/ethernet/microchip/lan865x/lan865x.c-131-\ndrivers/net/ethernet/microchip/lan865x/lan865x.c:132:static int lan865x_set_specific_multicast_addr(struct lan865x_priv *priv)\ndrivers/net/ethernet/microchip/lan865x/lan865x.c-133-{\n--\ndrivers/net/ethernet/microchip/lan865x/lan865x.c-139-\tnetdev_for_each_mc_addr(ha, priv-\u003enetdev) {\ndrivers/net/ethernet/microchip/lan865x/lan865x.c:140:\t\tu32 bit_num = lan865x_hash(ha-\u003eaddr);\ndrivers/net/ethernet/microchip/lan865x/lan865x.c-141-\n--\ndrivers/net/ethernet/microchip/lan865x/lan865x.c-163-\ndrivers/net/ethernet/microchip/lan865x/lan865x.c:164:static int lan865x_set_all_multicast_addr(struct lan865x_priv *priv)\ndrivers/net/ethernet/microchip/lan865x/lan865x.c-165-{\n--\ndrivers/net/ethernet/microchip/lan865x/lan865x.c-185-\ndrivers/net/ethernet/microchip/lan865x/lan865x.c:186:static int lan865x_clear_all_multicast_addr(struct lan865x_priv *priv)\ndrivers/net/ethernet/microchip/lan865x/lan865x.c-187-{\n--\ndrivers/net/ethernet/microchip/lan865x/lan865x.c-204-\ndrivers/net/ethernet/microchip/lan865x/lan865x.c:205:static void lan865x_multicast_work_handler(struct work_struct *work)\ndrivers/net/ethernet/microchip/lan865x/lan865x.c-206-{\ndrivers/net/ethernet/microchip/lan865x/lan865x.c:207:\tstruct lan865x_priv *priv = container_of(work, struct lan865x_priv,\ndrivers/net/ethernet/microchip/lan865x/lan865x.c-208-\t\t\t\t\t\t multicast_work);\n--\ndrivers/net/ethernet/microchip/lan865x/lan865x.c-218-\t\t/* Enabling all multicast mode */\ndrivers/net/ethernet/microchip/lan865x/lan865x.c:219:\t\tif (lan865x_set_all_multicast_addr(priv))\ndrivers/net/ethernet/microchip/lan865x/lan865x.c-220-\t\t\treturn;\n--\ndrivers/net/ethernet/microchip/lan865x/lan865x.c-226-\t\t/* Enabling specific multicast mode */\ndrivers/net/ethernet/microchip/lan865x/lan865x.c:227:\t\tif (lan865x_set_specific_multicast_addr(priv))\ndrivers/net/ethernet/microchip/lan865x/lan865x.c-228-\t\t\treturn;\n--\ndrivers/net/ethernet/microchip/lan865x/lan865x.c-234-\t\t/* Enabling local mac address only */\ndrivers/net/ethernet/microchip/lan865x/lan865x.c:235:\t\tif (lan865x_clear_all_multicast_addr(priv))\ndrivers/net/ethernet/microchip/lan865x/lan865x.c-236-\t\t\treturn;\n--\ndrivers/net/ethernet/microchip/lan865x/lan865x.c-243-\ndrivers/net/ethernet/microchip/lan865x/lan865x.c:244:static void lan865x_set_multicast_list(struct net_device *netdev)\ndrivers/net/ethernet/microchip/lan865x/lan865x.c-245-{\ndrivers/net/ethernet/microchip/lan865x/lan865x.c:246:\tstruct lan865x_priv *priv = netdev_priv(netdev);\ndrivers/net/ethernet/microchip/lan865x/lan865x.c-247-\n--\ndrivers/net/ethernet/microchip/lan865x/lan865x.c-250-\ndrivers/net/ethernet/microchip/lan865x/lan865x.c:251:static netdev_tx_t lan865x_send_packet(struct sk_buff *skb,\ndrivers/net/ethernet/microchip/lan865x/lan865x.c-252-\t\t\t\t       struct net_device *netdev)\ndrivers/net/ethernet/microchip/lan865x/lan865x.c-253-{\ndrivers/net/ethernet/microchip/lan865x/lan865x.c:254:\tstruct lan865x_priv *priv = netdev_priv(netdev);\ndrivers/net/ethernet/microchip/lan865x/lan865x.c-255-\n--\ndrivers/net/ethernet/microchip/lan865x/lan865x.c-258-\ndrivers/net/ethernet/microchip/lan865x/lan865x.c:259:static int lan865x_hw_disable(struct lan865x_priv *priv)\ndrivers/net/ethernet/microchip/lan865x/lan865x.c-260-{\n--\ndrivers/net/ethernet/microchip/lan865x/lan865x.c-273-\ndrivers/net/ethernet/microchip/lan865x/lan865x.c:274:static int lan865x_net_close(struct net_device *netdev)\ndrivers/net/ethernet/microchip/lan865x/lan865x.c-275-{\ndrivers/net/ethernet/microchip/lan865x/lan865x.c:276:\tstruct lan865x_priv *priv = netdev_priv(netdev);\ndrivers/net/ethernet/microchip/lan865x/lan865x.c-277-\tint ret;\n--\ndrivers/net/ethernet/microchip/lan865x/lan865x.c-280-\tphy_stop(netdev-\u003ephydev);\ndrivers/net/ethernet/microchip/lan865x/lan865x.c:281:\tret = lan865x_hw_disable(priv);\ndrivers/net/ethernet/microchip/lan865x/lan865x.c-282-\tif (ret) {\n--\ndrivers/net/ethernet/microchip/lan865x/lan865x.c-289-\ndrivers/net/ethernet/microchip/lan865x/lan865x.c:290:static int lan865x_hw_enable(struct lan865x_priv *priv)\ndrivers/net/ethernet/microchip/lan865x/lan865x.c-291-{\n--\ndrivers/net/ethernet/microchip/lan865x/lan865x.c-304-\ndrivers/net/ethernet/microchip/lan865x/lan865x.c:305:static int lan865x_net_open(struct net_device *netdev)\ndrivers/net/ethernet/microchip/lan865x/lan865x.c-306-{\ndrivers/net/ethernet/microchip/lan865x/lan865x.c:307:\tstruct lan865x_priv *priv = netdev_priv(netdev);\ndrivers/net/ethernet/microchip/lan865x/lan865x.c-308-\tint ret;\ndrivers/net/ethernet/microchip/lan865x/lan865x.c-309-\ndrivers/net/ethernet/microchip/lan865x/lan865x.c:310:\tret = lan865x_hw_enable(priv);\ndrivers/net/ethernet/microchip/lan865x/lan865x.c-311-\tif (ret) {\n--\ndrivers/net/ethernet/microchip/lan865x/lan865x.c-322-\ndrivers/net/ethernet/microchip/lan865x/lan865x.c:323:static const struct net_device_ops lan865x_netdev_ops = {\ndrivers/net/ethernet/microchip/lan865x/lan865x.c:324:\t.ndo_open\t\t= lan865x_net_open,\ndrivers/net/ethernet/microchip/lan865x/lan865x.c:325:\t.ndo_stop\t\t= lan865x_net_close,\ndrivers/net/ethernet/microchip/lan865x/lan865x.c:326:\t.ndo_start_xmit\t\t= lan865x_send_packet,\ndrivers/net/ethernet/microchip/lan865x/lan865x.c:327:\t.ndo_set_rx_mode\t= lan865x_set_multicast_list,\ndrivers/net/ethernet/microchip/lan865x/lan865x.c:328:\t.ndo_set_mac_address\t= lan865x_set_mac_address,\ndrivers/net/ethernet/microchip/lan865x/lan865x.c-329-\t.ndo_validate_addr\t= eth_validate_addr,\n--\ndrivers/net/ethernet/microchip/lan865x/lan865x.c-332-\ndrivers/net/ethernet/microchip/lan865x/lan865x.c:333:static int lan865x_probe(struct spi_device *spi)\ndrivers/net/ethernet/microchip/lan865x/lan865x.c-334-{\n--\ndrivers/net/ethernet/microchip/lan865x/lan865x.c-336-\tstruct net_device *netdev;\ndrivers/net/ethernet/microchip/lan865x/lan865x.c:337:\tstruct lan865x_priv *priv;\ndrivers/net/ethernet/microchip/lan865x/lan865x.c-338-\tint ret;\ndrivers/net/ethernet/microchip/lan865x/lan865x.c-339-\ndrivers/net/ethernet/microchip/lan865x/lan865x.c:340:\tnetdev = alloc_etherdev(sizeof(struct lan865x_priv));\ndrivers/net/ethernet/microchip/lan865x/lan865x.c-341-\tif (!netdev)\n--\ndrivers/net/ethernet/microchip/lan865x/lan865x.c-347-\tspi_set_drvdata(spi, priv);\ndrivers/net/ethernet/microchip/lan865x/lan865x.c:348:\tINIT_WORK(\u0026priv-\u003emulticast_work, lan865x_multicast_work_handler);\ndrivers/net/ethernet/microchip/lan865x/lan865x.c-349-\n--\ndrivers/net/ethernet/microchip/lan865x/lan865x.c-393-\ndrivers/net/ethernet/microchip/lan865x/lan865x.c:394:\tret = lan865x_set_hw_macaddr(priv, netdev-\u003edev_addr);\ndrivers/net/ethernet/microchip/lan865x/lan865x.c-395-\tif (ret) {\n--\ndrivers/net/ethernet/microchip/lan865x/lan865x.c-401-\tnetdev-\u003eirq = spi-\u003eirq;\ndrivers/net/ethernet/microchip/lan865x/lan865x.c:402:\tnetdev-\u003enetdev_ops = \u0026lan865x_netdev_ops;\ndrivers/net/ethernet/microchip/lan865x/lan865x.c:403:\tnetdev-\u003eethtool_ops = \u0026lan865x_ethtool_ops;\ndrivers/net/ethernet/microchip/lan865x/lan865x.c-404-\n--\ndrivers/net/ethernet/microchip/lan865x/lan865x.c-419-\ndrivers/net/ethernet/microchip/lan865x/lan865x.c:420:static void lan865x_remove(struct spi_device *spi)\ndrivers/net/ethernet/microchip/lan865x/lan865x.c-421-{\ndrivers/net/ethernet/microchip/lan865x/lan865x.c:422:\tstruct lan865x_priv *priv = spi_get_drvdata(spi);\ndrivers/net/ethernet/microchip/lan865x/lan865x.c-423-\n--\ndrivers/net/ethernet/microchip/lan865x/lan865x.c-429-\ndrivers/net/ethernet/microchip/lan865x/lan865x.c:430:static const struct spi_device_id lan865x_ids[] = {\ndrivers/net/ethernet/microchip/lan865x/lan865x.c-431-\t{ .name = \"lan8650\" },\n--\ndrivers/net/ethernet/microchip/lan865x/lan865x.c-434-};\ndrivers/net/ethernet/microchip/lan865x/lan865x.c:435:MODULE_DEVICE_TABLE(spi, lan865x_ids);\ndrivers/net/ethernet/microchip/lan865x/lan865x.c-436-\ndrivers/net/ethernet/microchip/lan865x/lan865x.c:437:static const struct of_device_id lan865x_dt_ids[] = {\ndrivers/net/ethernet/microchip/lan865x/lan865x.c-438-\t{ .compatible = \"microchip,lan8650\" },\n--\ndrivers/net/ethernet/microchip/lan865x/lan865x.c-441-};\ndrivers/net/ethernet/microchip/lan865x/lan865x.c:442:MODULE_DEVICE_TABLE(of, lan865x_dt_ids);\ndrivers/net/ethernet/microchip/lan865x/lan865x.c-443-\ndrivers/net/ethernet/microchip/lan865x/lan865x.c:444:static struct spi_driver lan865x_driver = {\ndrivers/net/ethernet/microchip/lan865x/lan865x.c-445-\t.driver = {\ndrivers/net/ethernet/microchip/lan865x/lan865x.c-446-\t\t.name = DRV_NAME,\ndrivers/net/ethernet/microchip/lan865x/lan865x.c:447:\t\t.of_match_table = lan865x_dt_ids,\ndrivers/net/ethernet/microchip/lan865x/lan865x.c-448-\t },\ndrivers/net/ethernet/microchip/lan865x/lan865x.c:449:\t.probe = lan865x_probe,\ndrivers/net/ethernet/microchip/lan865x/lan865x.c:450:\t.remove = lan865x_remove,\ndrivers/net/ethernet/microchip/lan865x/lan865x.c:451:\t.id_table = lan865x_ids,\ndrivers/net/ethernet/microchip/lan865x/lan865x.c-452-};\ndrivers/net/ethernet/microchip/lan865x/lan865x.c:453:module_spi_driver(lan865x_driver);\ndrivers/net/ethernet/microchip/lan865x/lan865x.c-454-\n--\ndrivers/net/phy/microchip_t1s.c=89=static const u16 lan867x_revb1_fixup_masks[12] = {\n--\ndrivers/net/phy/microchip_t1s.c-99- */\ndrivers/net/phy/microchip_t1s.c:100:static const u32 lan865x_revb_fixup_registers[17] = {\ndrivers/net/phy/microchip_t1s.c-101-\t0x00D0, 0x00E0, 0x00E9, 0x00F5,\n--\ndrivers/net/phy/microchip_t1s.c-107-\ndrivers/net/phy/microchip_t1s.c:108:static const u16 lan865x_revb_fixup_values[17] = {\ndrivers/net/phy/microchip_t1s.c-109-\t0x3F31, 0xC000, 0x9E50, 0x1CF8,\n--\ndrivers/net/phy/microchip_t1s.c-115-\ndrivers/net/phy/microchip_t1s.c:116:static const u16 lan865x_revb_fixup_cfg_regs[2] = {\ndrivers/net/phy/microchip_t1s.c-117-\t0x0084, 0x008A,\n--\ndrivers/net/phy/microchip_t1s.c-119-\ndrivers/net/phy/microchip_t1s.c:120:static const u32 lan865x_revb_sqi_fixup_regs[12] = {\ndrivers/net/phy/microchip_t1s.c-121-\t0x00B0, 0x00B1, 0x00B2, 0x00B3,\n--\ndrivers/net/phy/microchip_t1s.c-125-\ndrivers/net/phy/microchip_t1s.c:126:static const u16 lan865x_revb_sqi_fixup_values[12] = {\ndrivers/net/phy/microchip_t1s.c-127-\t0x0103, 0x0910, 0x1D26, 0x002A,\n--\ndrivers/net/phy/microchip_t1s.c-131-\ndrivers/net/phy/microchip_t1s.c:132:static const u16 lan865x_revb_sqi_fixup_cfg_regs[3] = {\ndrivers/net/phy/microchip_t1s.c-133-\t0x00AD, 0x00AE, 0x00AF,\n--\ndrivers/net/phy/microchip_t1s.c=146=static const u16 lan867x_revd0_fixup_values[8] = {\n--\ndrivers/net/phy/microchip_t1s.c-158- */\ndrivers/net/phy/microchip_t1s.c:159:static int lan865x_revb_indirect_read(struct phy_device *phydev, u16 addr)\ndrivers/net/phy/microchip_t1s.c-160-{\n--\ndrivers/net/phy/microchip_t1s.c-178- */\ndrivers/net/phy/microchip_t1s.c:179:static int lan865x_generate_cfg_offsets(struct phy_device *phydev, s8 offsets[])\ndrivers/net/phy/microchip_t1s.c-180-{\n--\ndrivers/net/phy/microchip_t1s.c-184-\tfor (int i = 0; i \u003c ARRAY_SIZE(fixup_regs); i++) {\ndrivers/net/phy/microchip_t1s.c:185:\t\tret = lan865x_revb_indirect_read(phydev, fixup_regs[i]);\ndrivers/net/phy/microchip_t1s.c-186-\t\tif (ret \u003c 0)\n--\ndrivers/net/phy/microchip_t1s.c-199-\ndrivers/net/phy/microchip_t1s.c:200:static int lan865x_read_cfg_params(struct phy_device *phydev,\ndrivers/net/phy/microchip_t1s.c-201-\t\t\t\t   const u16 cfg_regs[], u16 cfg_params[],\n--\ndrivers/net/phy/microchip_t1s.c-216-\ndrivers/net/phy/microchip_t1s.c:217:static int lan865x_write_cfg_params(struct phy_device *phydev,\ndrivers/net/phy/microchip_t1s.c-218-\t\t\t\t    const u16 cfg_regs[], u16 cfg_params[],\n--\ndrivers/net/phy/microchip_t1s.c-232-\ndrivers/net/phy/microchip_t1s.c:233:static int lan865x_setup_cfgparam(struct phy_device *phydev, s8 offsets[])\ndrivers/net/phy/microchip_t1s.c-234-{\ndrivers/net/phy/microchip_t1s.c:235:\tu16 cfg_results[ARRAY_SIZE(lan865x_revb_fixup_cfg_regs)];\ndrivers/net/phy/microchip_t1s.c:236:\tu16 cfg_params[ARRAY_SIZE(lan865x_revb_fixup_cfg_regs)];\ndrivers/net/phy/microchip_t1s.c-237-\tint ret;\ndrivers/net/phy/microchip_t1s.c-238-\ndrivers/net/phy/microchip_t1s.c:239:\tret = lan865x_read_cfg_params(phydev, lan865x_revb_fixup_cfg_regs,\ndrivers/net/phy/microchip_t1s.c-240-\t\t\t\t      cfg_params, ARRAY_SIZE(cfg_params));\n--\ndrivers/net/phy/microchip_t1s.c-248-\ndrivers/net/phy/microchip_t1s.c:249:\treturn lan865x_write_cfg_params(phydev, lan865x_revb_fixup_cfg_regs,\ndrivers/net/phy/microchip_t1s.c-250-\t\t\t\t\tcfg_results, ARRAY_SIZE(cfg_results));\n--\ndrivers/net/phy/microchip_t1s.c-252-\ndrivers/net/phy/microchip_t1s.c:253:static int lan865x_setup_sqi_cfgparam(struct phy_device *phydev, s8 offsets[])\ndrivers/net/phy/microchip_t1s.c-254-{\ndrivers/net/phy/microchip_t1s.c:255:\tu16 cfg_results[ARRAY_SIZE(lan865x_revb_sqi_fixup_cfg_regs)];\ndrivers/net/phy/microchip_t1s.c:256:\tu16 cfg_params[ARRAY_SIZE(lan865x_revb_sqi_fixup_cfg_regs)];\ndrivers/net/phy/microchip_t1s.c-257-\tint ret;\ndrivers/net/phy/microchip_t1s.c-258-\ndrivers/net/phy/microchip_t1s.c:259:\tret = lan865x_read_cfg_params(phydev, lan865x_revb_sqi_fixup_cfg_regs,\ndrivers/net/phy/microchip_t1s.c-260-\t\t\t\t      cfg_params, ARRAY_SIZE(cfg_params));\n--\ndrivers/net/phy/microchip_t1s.c-270-\ndrivers/net/phy/microchip_t1s.c:271:\treturn lan865x_write_cfg_params(phydev, lan865x_revb_sqi_fixup_cfg_regs,\ndrivers/net/phy/microchip_t1s.c-272-\t\t\t\t\tcfg_results, ARRAY_SIZE(cfg_results));\n--\ndrivers/net/phy/microchip_t1s.c-274-\ndrivers/net/phy/microchip_t1s.c:275:static int lan865x_revb_config_init(struct phy_device *phydev)\ndrivers/net/phy/microchip_t1s.c-276-{\n--\ndrivers/net/phy/microchip_t1s.c-282-\t */\ndrivers/net/phy/microchip_t1s.c:283:\tret = lan865x_generate_cfg_offsets(phydev, offsets);\ndrivers/net/phy/microchip_t1s.c-284-\tif (ret)\n--\ndrivers/net/phy/microchip_t1s.c-286-\ndrivers/net/phy/microchip_t1s.c:287:\tfor (int i = 0; i \u003c ARRAY_SIZE(lan865x_revb_fixup_registers); i++) {\ndrivers/net/phy/microchip_t1s.c-288-\t\tret = phy_write_mmd(phydev, MDIO_MMD_VEND2,\ndrivers/net/phy/microchip_t1s.c:289:\t\t\t\t    lan865x_revb_fixup_registers[i],\ndrivers/net/phy/microchip_t1s.c:290:\t\t\t\t    lan865x_revb_fixup_values[i]);\ndrivers/net/phy/microchip_t1s.c-291-\t\tif (ret)\n--\ndrivers/net/phy/microchip_t1s.c-294-\t\tif (i == 1) {\ndrivers/net/phy/microchip_t1s.c:295:\t\t\tret = lan865x_setup_cfgparam(phydev, offsets);\ndrivers/net/phy/microchip_t1s.c-296-\t\t\tif (ret)\n--\ndrivers/net/phy/microchip_t1s.c-300-\ndrivers/net/phy/microchip_t1s.c:301:\tret = lan865x_setup_sqi_cfgparam(phydev, offsets);\ndrivers/net/phy/microchip_t1s.c-302-\tif (ret)\n--\ndrivers/net/phy/microchip_t1s.c-304-\ndrivers/net/phy/microchip_t1s.c:305:\tfor (int i = 0; i \u003c ARRAY_SIZE(lan865x_revb_sqi_fixup_regs); i++) {\ndrivers/net/phy/microchip_t1s.c-306-\t\tret = phy_write_mmd(phydev, MDIO_MMD_VEND2,\ndrivers/net/phy/microchip_t1s.c:307:\t\t\t\t    lan865x_revb_sqi_fixup_regs[i],\ndrivers/net/phy/microchip_t1s.c:308:\t\t\t\t    lan865x_revb_sqi_fixup_values[i]);\ndrivers/net/phy/microchip_t1s.c-309-\t\tif (ret)\n--\ndrivers/net/phy/microchip_t1s.c=341=static int lan867x_revc_config_init(struct phy_device *phydev)\n--\ndrivers/net/phy/microchip_t1s.c-349-\ndrivers/net/phy/microchip_t1s.c:350:\tret = lan865x_generate_cfg_offsets(phydev, offsets);\ndrivers/net/phy/microchip_t1s.c-351-\tif (ret)\n--\ndrivers/net/phy/microchip_t1s.c-365-\t\tret = phy_write_mmd(phydev, MDIO_MMD_VEND2,\ndrivers/net/phy/microchip_t1s.c:366:\t\t\t\t    lan865x_revb_fixup_registers[i],\ndrivers/net/phy/microchip_t1s.c:367:\t\t\t\t    lan865x_revb_fixup_values[i]);\ndrivers/net/phy/microchip_t1s.c-368-\t\tif (ret)\n--\ndrivers/net/phy/microchip_t1s.c-371-\t\tif (i == 1) {\ndrivers/net/phy/microchip_t1s.c:372:\t\t\tret = lan865x_setup_cfgparam(phydev, offsets);\ndrivers/net/phy/microchip_t1s.c-373-\t\t\tif (ret)\n--\ndrivers/net/phy/microchip_t1s.c-377-\ndrivers/net/phy/microchip_t1s.c:378:\tret = lan865x_setup_sqi_cfgparam(phydev, offsets);\ndrivers/net/phy/microchip_t1s.c-379-\tif (ret)\n--\ndrivers/net/phy/microchip_t1s.c-381-\ndrivers/net/phy/microchip_t1s.c:382:\tfor (int i = 0; i \u003c ARRAY_SIZE(lan865x_revb_sqi_fixup_regs); i++) {\ndrivers/net/phy/microchip_t1s.c-383-\t\tret = phy_write_mmd(phydev, MDIO_MMD_VEND2,\ndrivers/net/phy/microchip_t1s.c:384:\t\t\t\t    lan865x_revb_sqi_fixup_regs[i],\ndrivers/net/phy/microchip_t1s.c:385:\t\t\t\t    lan865x_revb_sqi_fixup_values[i]);\ndrivers/net/phy/microchip_t1s.c-386-\t\tif (ret)\n--\ndrivers/net/phy/microchip_t1s.c=658=static struct phy_driver microchip_t1s_driver[] = {\n--\ndrivers/net/phy/microchip_t1s.c-713-\t\t.features           = PHY_BASIC_T1S_P2MP_FEATURES,\ndrivers/net/phy/microchip_t1s.c:714:\t\t.config_init        = lan865x_revb_config_init,\ndrivers/net/phy/microchip_t1s.c-715-\t\t.read_status        = lan86xx_read_status,\n"
}

							input: 19839
							output: 27
							thoughts: 39

Okay, here's my take on those thoughts, framed as my own mental process, given my expertise:

**Checking the OA_TC6 Implementation and Configuration**

Right, let's dive into `oa_tc6.c` and its associated Kconfig file. I need to understand the configuration options related to OA_TC6. Specifically, I need to pinpoint the Kconfig entries that control whether this functionality is included in the build. I'm looking for the definitions related to `OA_TC6` itself, of course, but I should also see how the `MICROCHIP_T1S` driver interacts with it, if at all. It's important to understand the dependencies and relationships, and whether these features are mutually exclusive, or have specific conditions attached. I'm mentally parsing the Kconfig entries to quickly grasp the build configuration options. This will help me quickly understand how to enable or disable the relevant code during the build process.

{
  "Expression": "OA_TC6",
  "PathPrefix": "drivers/net"
}

{
  "Output": "\nFull output is too long, showing 500 out of 612 lines.\nUse more precise expression if possible.\n\ndrivers/net/ethernet/Kconfig=139=config ETHOC\n--\ndrivers/net/ethernet/Kconfig-148-\ndrivers/net/ethernet/Kconfig:149:config OA_TC6\ndrivers/net/ethernet/Kconfig-150-\ttristate \"OPEN Alliance TC6 10BASE-T1x MAC-PHY support\" if COMPILE_TEST\n--\ndrivers/net/ethernet/Makefile=106=obj-$(CONFIG_NET_VENDOR_PENSANDO) += pensando/\ndrivers/net/ethernet/Makefile:107:obj-$(CONFIG_OA_TC6) += oa_tc6.o\ndrivers/net/ethernet/Makefile-108-obj-$(CONFIG_NET_VENDOR_ZTE) += zte/\n--\ndrivers/net/ethernet/adi/Kconfig=29=config ADIN1140\n--\ndrivers/net/ethernet/adi/Kconfig-32-\tselect ADIN1140_PHY\ndrivers/net/ethernet/adi/Kconfig:33:\tselect OA_TC6\ndrivers/net/ethernet/adi/Kconfig-34-\thelp\n--\ndrivers/net/ethernet/adi/adin1140.c=143=static int adin1140_mac_filter_set(struct adin1140_priv *priv,\n--\ndrivers/net/ethernet/adi/adin1140.c-155-\ndrivers/net/ethernet/adi/adin1140.c:156:\tret = oa_tc6_write_register_mms(priv-\u003etc6, OA_TC6_MAC_MMS1,\ndrivers/net/ethernet/adi/adin1140.c-157-\t\t\t\t\treg_address,\n--\ndrivers/net/ethernet/adi/adin1140.c-164-\treg_address = ADIN1140_MAC_ADDR_FILT_LWR_REG + 2 * slot;\ndrivers/net/ethernet/adi/adin1140.c:165:\tret = oa_tc6_write_register_mms(priv-\u003etc6, OA_TC6_MAC_MMS1,\ndrivers/net/ethernet/adi/adin1140.c-166-\t\t\t\t\treg_address,\n--\ndrivers/net/ethernet/adi/adin1140.c-180-\ndrivers/net/ethernet/adi/adin1140.c:181:\tret = oa_tc6_write_register_mms(priv-\u003etc6, OA_TC6_MAC_MMS1,\ndrivers/net/ethernet/adi/adin1140.c-182-\t\t\t\t\treg_address, val);\n--\ndrivers/net/ethernet/adi/adin1140.c-188-\ndrivers/net/ethernet/adi/adin1140.c:189:\treturn oa_tc6_write_register_mms(priv-\u003etc6, OA_TC6_MAC_MMS1,\ndrivers/net/ethernet/adi/adin1140.c-190-\t\t\t\t\t reg_address, val);\n--\ndrivers/net/ethernet/adi/adin1140.c=250=static int adin1140_promiscuous_mode(struct adin1140_priv *priv, bool enabled)\n--\ndrivers/net/ethernet/adi/adin1140.c-254-\ndrivers/net/ethernet/adi/adin1140.c:255:\tret = oa_tc6_read_register(priv-\u003etc6, OA_TC6_REG_CONFIG2, \u0026val);\ndrivers/net/ethernet/adi/adin1140.c-256-\tif (ret)\n--\ndrivers/net/ethernet/adi/adin1140.c-263-\ndrivers/net/ethernet/adi/adin1140.c:264:\treturn oa_tc6_write_register(priv-\u003etc6, OA_TC6_REG_CONFIG2, val);\ndrivers/net/ethernet/adi/adin1140.c-265-}\n--\ndrivers/net/ethernet/adi/adin1140.c=341=static void adin1140_stats_work(struct work_struct *work)\n--\ndrivers/net/ethernet/adi/adin1140.c-351-\tfor (i = 0; i \u003c ARRAY_SIZE(adin1140_stat_regs); i++) {\ndrivers/net/ethernet/adi/adin1140.c:352:\t\tret = oa_tc6_read_register_mms(priv-\u003etc6, OA_TC6_MAC_MMS1,\ndrivers/net/ethernet/adi/adin1140.c-353-\t\t\t\t\t       adin1140_stat_regs[i],\n--\ndrivers/net/ethernet/adi/adin1140.c=366=static int adin1140_configure(struct adin1140_priv *priv)\n--\ndrivers/net/ethernet/adi/adin1140.c-375-\t/* Disable MAC loopback */\ndrivers/net/ethernet/adi/adin1140.c:376:\tret = oa_tc6_write_register_mms(priv-\u003etc6, OA_TC6_MAC_MMS1,\ndrivers/net/ethernet/adi/adin1140.c-377-\t\t\t\t\tADIN1140_MAC_P1_LOOP_ADDR_REG, 0x0);\n--\ndrivers/net/ethernet/adi/adin1140.c-380-\ndrivers/net/ethernet/adi/adin1140.c:381:\tret = oa_tc6_read_register(priv-\u003etc6, OA_TC6_REG_CONFIG2, \u0026reg_val);\ndrivers/net/ethernet/adi/adin1140.c-382-\tif (ret)\n--\ndrivers/net/ethernet/adi/adin1140.c-386-\ndrivers/net/ethernet/adi/adin1140.c:387:\tret = oa_tc6_write_register(priv-\u003etc6, OA_TC6_REG_CONFIG2, reg_val);\ndrivers/net/ethernet/adi/adin1140.c-388-\tif (ret)\n--\ndrivers/net/ethernet/adi/adin1140.c=709=static int adin1140_probe(struct spi_device *spi)\n--\ndrivers/net/ethernet/adi/adin1140.c-724-\ndrivers/net/ethernet/adi/adin1140.c:725:\ttc6_quirks.quirk_flags = OA_TC6_BROKEN_PHY;\ndrivers/net/ethernet/adi/adin1140.c-726-\n--\ndrivers/net/ethernet/microchip/lan865x/Kconfig=8=config LAN865X\n--\ndrivers/net/ethernet/microchip/lan865x/Kconfig-10-\tdepends on SPI\ndrivers/net/ethernet/microchip/lan865x/Kconfig:11:\tselect OA_TC6\ndrivers/net/ethernet/microchip/lan865x/Kconfig-12-\thelp\n--\ndrivers/net/ethernet/microchip/lan865x/lan865x.c=333=static int lan865x_probe(struct spi_device *spi)\n--\ndrivers/net/ethernet/microchip/lan865x/lan865x.c-349-\ndrivers/net/ethernet/microchip/lan865x/lan865x.c:350:\ttc6_quirks.quirk_flags = OA_TC6_PHY_INT;\ndrivers/net/ethernet/microchip/lan865x/lan865x.c-351-\tpriv-\u003etc6 = oa_tc6_init(spi, netdev, \u0026tc6_quirks);\n--\ndrivers/net/ethernet/oa_tc6.c-17-/* Control command header */\ndrivers/net/ethernet/oa_tc6.c:18:#define OA_TC6_CTRL_HEADER_DATA_NOT_CTRL\tBIT(31)\ndrivers/net/ethernet/oa_tc6.c:19:#define OA_TC6_CTRL_HEADER_WRITE_NOT_READ\tBIT(29)\ndrivers/net/ethernet/oa_tc6.c:20:#define OA_TC6_CTRL_HEADER_MEM_MAP_SELECTOR\tGENMASK(27, 24)\ndrivers/net/ethernet/oa_tc6.c:21:#define OA_TC6_CTRL_HEADER_ADDR\t\t\tGENMASK(23, 8)\ndrivers/net/ethernet/oa_tc6.c:22:#define OA_TC6_CTRL_HEADER_LENGTH\t\tGENMASK(7, 1)\ndrivers/net/ethernet/oa_tc6.c:23:#define OA_TC6_CTRL_HEADER_PARITY\t\tBIT(0)\ndrivers/net/ethernet/oa_tc6.c-24-\ndrivers/net/ethernet/oa_tc6.c-25-/* Data header */\ndrivers/net/ethernet/oa_tc6.c:26:#define OA_TC6_DATA_HEADER_DATA_NOT_CTRL\tBIT(31)\ndrivers/net/ethernet/oa_tc6.c:27:#define OA_TC6_DATA_HEADER_DATA_VALID\t\tBIT(21)\ndrivers/net/ethernet/oa_tc6.c:28:#define OA_TC6_DATA_HEADER_START_VALID\t\tBIT(20)\ndrivers/net/ethernet/oa_tc6.c:29:#define OA_TC6_DATA_HEADER_START_WORD_OFFSET\tGENMASK(19, 16)\ndrivers/net/ethernet/oa_tc6.c:30:#define OA_TC6_DATA_HEADER_END_VALID\t\tBIT(14)\ndrivers/net/ethernet/oa_tc6.c:31:#define OA_TC6_DATA_HEADER_END_BYTE_OFFSET\tGENMASK(13, 8)\ndrivers/net/ethernet/oa_tc6.c:32:#define OA_TC6_DATA_HEADER_PARITY\t\tBIT(0)\ndrivers/net/ethernet/oa_tc6.c-33-\ndrivers/net/ethernet/oa_tc6.c-34-/* Data footer */\ndrivers/net/ethernet/oa_tc6.c:35:#define OA_TC6_DATA_FOOTER_EXTENDED_STS\t\tBIT(31)\ndrivers/net/ethernet/oa_tc6.c:36:#define OA_TC6_DATA_FOOTER_RXD_HEADER_BAD\tBIT(30)\ndrivers/net/ethernet/oa_tc6.c:37:#define OA_TC6_DATA_FOOTER_CONFIG_SYNC\t\tBIT(29)\ndrivers/net/ethernet/oa_tc6.c:38:#define OA_TC6_DATA_FOOTER_RX_CHUNKS\t\tGENMASK(28, 24)\ndrivers/net/ethernet/oa_tc6.c:39:#define OA_TC6_DATA_FOOTER_DATA_VALID\t\tBIT(21)\ndrivers/net/ethernet/oa_tc6.c:40:#define OA_TC6_DATA_FOOTER_START_VALID\t\tBIT(20)\ndrivers/net/ethernet/oa_tc6.c:41:#define OA_TC6_DATA_FOOTER_START_WORD_OFFSET\tGENMASK(19, 16)\ndrivers/net/ethernet/oa_tc6.c:42:#define OA_TC6_DATA_FOOTER_END_VALID\t\tBIT(14)\ndrivers/net/ethernet/oa_tc6.c:43:#define OA_TC6_DATA_FOOTER_END_BYTE_OFFSET\tGENMASK(13, 8)\ndrivers/net/ethernet/oa_tc6.c:44:#define OA_TC6_DATA_FOOTER_TX_CREDITS\t\tGENMASK(5, 1)\ndrivers/net/ethernet/oa_tc6.c-45-\ndrivers/net/ethernet/oa_tc6.c:46:#define OA_TC6_CTRL_PROT_REPLY_SIZE\t\t4\ndrivers/net/ethernet/oa_tc6.c:47:#define OA_TC6_CTRL_HEADER_SIZE\t\t\t4\ndrivers/net/ethernet/oa_tc6.c:48:#define OA_TC6_CTRL_REG_VALUE_SIZE\t\t4\ndrivers/net/ethernet/oa_tc6.c:49:#define OA_TC6_CTRL_IGNORED_SIZE\t\t4\ndrivers/net/ethernet/oa_tc6.c:50:#define OA_TC6_CTRL_MAX_REGISTERS\t\t128\ndrivers/net/ethernet/oa_tc6.c:51:#define OA_TC6_CTRL_SPI_BUF_SIZE\t(OA_TC6_CTRL_HEADER_SIZE +\\\ndrivers/net/ethernet/oa_tc6.c:52:\t\t\t\t\t(OA_TC6_CTRL_MAX_REGISTERS *\\\ndrivers/net/ethernet/oa_tc6.c:53:\t\t\t\t\t(OA_TC6_CTRL_REG_VALUE_SIZE +\\\ndrivers/net/ethernet/oa_tc6.c:54:\t\t\t\t\tOA_TC6_CTRL_PROT_REPLY_SIZE)) +\\\ndrivers/net/ethernet/oa_tc6.c:55:\t\t\t\t\tOA_TC6_CTRL_IGNORED_SIZE)\ndrivers/net/ethernet/oa_tc6.c-56-\ndrivers/net/ethernet/oa_tc6.c:57:#define OA_TC6_CHUNK_PAYLOAD_SIZE\t\t64\ndrivers/net/ethernet/oa_tc6.c:58:#define OA_TC6_DATA_HEADER_SIZE\t\t\t4\ndrivers/net/ethernet/oa_tc6.c:59:#define OA_TC6_CHUNK_SIZE\t\t\t(OA_TC6_DATA_HEADER_SIZE +\\\ndrivers/net/ethernet/oa_tc6.c:60:\t\t\t\t\t\tOA_TC6_CHUNK_PAYLOAD_SIZE)\ndrivers/net/ethernet/oa_tc6.c:61:#define OA_TC6_MAX_TX_CHUNKS\t\t\t48\ndrivers/net/ethernet/oa_tc6.c:62:#define OA_TC6_SPI_DATA_BUF_SIZE\t\t(OA_TC6_MAX_TX_CHUNKS *\\\ndrivers/net/ethernet/oa_tc6.c:63:\t\t\t\t\t\tOA_TC6_CHUNK_SIZE)\ndrivers/net/ethernet/oa_tc6.c-64-#define STATUS0_RESETC_POLL_DELAY\t\t1000\n--\ndrivers/net/ethernet/oa_tc6.c-66-\ndrivers/net/ethernet/oa_tc6.c:67:#define OA_TC6_REG_MMS_MASK\t\tGENMASK(19, 16)\ndrivers/net/ethernet/oa_tc6.c-68-\n--\ndrivers/net/ethernet/oa_tc6.c=97=enum oa_tc6_header_type {\ndrivers/net/ethernet/oa_tc6.c:98:\tOA_TC6_CTRL_HEADER,\ndrivers/net/ethernet/oa_tc6.c:99:\tOA_TC6_DATA_HEADER,\ndrivers/net/ethernet/oa_tc6.c-100-};\n--\ndrivers/net/ethernet/oa_tc6.c=102=enum oa_tc6_register_op {\ndrivers/net/ethernet/oa_tc6.c:103:\tOA_TC6_CTRL_REG_READ = 0,\ndrivers/net/ethernet/oa_tc6.c:104:\tOA_TC6_CTRL_REG_WRITE = 1,\ndrivers/net/ethernet/oa_tc6.c-105-};\n--\ndrivers/net/ethernet/oa_tc6.c=107=enum oa_tc6_data_valid_info {\ndrivers/net/ethernet/oa_tc6.c:108:\tOA_TC6_DATA_INVALID,\ndrivers/net/ethernet/oa_tc6.c:109:\tOA_TC6_DATA_VALID,\ndrivers/net/ethernet/oa_tc6.c-110-};\n--\ndrivers/net/ethernet/oa_tc6.c=112=enum oa_tc6_data_start_valid_info {\ndrivers/net/ethernet/oa_tc6.c:113:\tOA_TC6_DATA_START_INVALID,\ndrivers/net/ethernet/oa_tc6.c:114:\tOA_TC6_DATA_START_VALID,\ndrivers/net/ethernet/oa_tc6.c-115-};\n--\ndrivers/net/ethernet/oa_tc6.c=117=enum oa_tc6_data_end_valid_info {\ndrivers/net/ethernet/oa_tc6.c:118:\tOA_TC6_DATA_END_INVALID,\ndrivers/net/ethernet/oa_tc6.c:119:\tOA_TC6_DATA_END_VALID,\ndrivers/net/ethernet/oa_tc6.c-120-};\n--\ndrivers/net/ethernet/oa_tc6.c=122=static int oa_tc6_spi_transfer(struct oa_tc6 *tc6,\n--\ndrivers/net/ethernet/oa_tc6.c-127-\ndrivers/net/ethernet/oa_tc6.c:128:\tif (header_type == OA_TC6_DATA_HEADER) {\ndrivers/net/ethernet/oa_tc6.c-129-\t\txfer.tx_buf = tc6-\u003espi_data_tx_buf;\n--\ndrivers/net/ethernet/oa_tc6.c=156=static __be32 oa_tc6_prepare_ctrl_header(u32 addr, u8 length,\n--\ndrivers/net/ethernet/oa_tc6.c-160-\ndrivers/net/ethernet/oa_tc6.c:161:\theader = FIELD_PREP(OA_TC6_CTRL_HEADER_DATA_NOT_CTRL,\ndrivers/net/ethernet/oa_tc6.c:162:\t\t\t    OA_TC6_CTRL_HEADER) |\ndrivers/net/ethernet/oa_tc6.c:163:\t\t FIELD_PREP(OA_TC6_CTRL_HEADER_WRITE_NOT_READ, reg_op) |\ndrivers/net/ethernet/oa_tc6.c:164:\t\t FIELD_PREP(OA_TC6_CTRL_HEADER_MEM_MAP_SELECTOR, addr \u003e\u003e 16) |\ndrivers/net/ethernet/oa_tc6.c:165:\t\t FIELD_PREP(OA_TC6_CTRL_HEADER_ADDR, addr) |\ndrivers/net/ethernet/oa_tc6.c:166:\t\t FIELD_PREP(OA_TC6_CTRL_HEADER_LENGTH, length - 1);\ndrivers/net/ethernet/oa_tc6.c:167:\theader |= FIELD_PREP(OA_TC6_CTRL_HEADER_PARITY,\ndrivers/net/ethernet/oa_tc6.c-168-\t\t\t     oa_tc6_get_parity(header));\n--\ndrivers/net/ethernet/oa_tc6.c=173=static void oa_tc6_update_ctrl_write_data(struct oa_tc6 *tc6, u32 value[],\n--\ndrivers/net/ethernet/oa_tc6.c-175-{\ndrivers/net/ethernet/oa_tc6.c:176:\t__be32 *tx_buf = tc6-\u003espi_ctrl_tx_buf + OA_TC6_CTRL_HEADER_SIZE;\ndrivers/net/ethernet/oa_tc6.c-177-\n--\ndrivers/net/ethernet/oa_tc6.c=185=static u16 oa_tc6_calculate_ctrl_buf_size(u8 length, bool ctrl_prot)\ndrivers/net/ethernet/oa_tc6.c-186-{\ndrivers/net/ethernet/oa_tc6.c:187:\tu32 reply_size = OA_TC6_CTRL_REG_VALUE_SIZE;\ndrivers/net/ethernet/oa_tc6.c-188-\ndrivers/net/ethernet/oa_tc6.c-189-\tif (ctrl_prot)\ndrivers/net/ethernet/oa_tc6.c:190:\t\treply_size += OA_TC6_CTRL_PROT_REPLY_SIZE;\ndrivers/net/ethernet/oa_tc6.c-191-\n--\ndrivers/net/ethernet/oa_tc6.c-195-\t */\ndrivers/net/ethernet/oa_tc6.c:196:\treturn OA_TC6_CTRL_HEADER_SIZE + reply_size * length +\ndrivers/net/ethernet/oa_tc6.c:197:\t       OA_TC6_CTRL_IGNORED_SIZE;\ndrivers/net/ethernet/oa_tc6.c-198-}\n--\ndrivers/net/ethernet/oa_tc6.c=200=static void oa_tc6_prepare_ctrl_spi_buf(struct oa_tc6 *tc6, u32 address,\n--\ndrivers/net/ethernet/oa_tc6.c-209-\ndrivers/net/ethernet/oa_tc6.c:210:\tif (reg_op == OA_TC6_CTRL_REG_WRITE)\ndrivers/net/ethernet/oa_tc6.c-211-\t\toa_tc6_update_ctrl_write_data(tc6, value, length);\n--\ndrivers/net/ethernet/oa_tc6.c=214=static int oa_tc6_check_ctrl_write_reply(struct oa_tc6 *tc6, u8 size)\n--\ndrivers/net/ethernet/oa_tc6.c-218-\ndrivers/net/ethernet/oa_tc6.c:219:\trx_buf += OA_TC6_CTRL_IGNORED_SIZE;\ndrivers/net/ethernet/oa_tc6.c-220-\n--\ndrivers/net/ethernet/oa_tc6.c-223-\t */\ndrivers/net/ethernet/oa_tc6.c:224:\tif (memcmp(tx_buf, rx_buf, size - OA_TC6_CTRL_IGNORED_SIZE))\ndrivers/net/ethernet/oa_tc6.c-225-\t\treturn -EPROTO;\n--\ndrivers/net/ethernet/oa_tc6.c=230=static int oa_tc6_check_ctrl_read_reply(struct oa_tc6 *tc6, u8 length)\ndrivers/net/ethernet/oa_tc6.c-231-{\ndrivers/net/ethernet/oa_tc6.c:232:\t__be32 *rx_buf = tc6-\u003espi_ctrl_rx_buf + OA_TC6_CTRL_IGNORED_SIZE;\ndrivers/net/ethernet/oa_tc6.c-233-\t__be32 *tx_buf = tc6-\u003espi_ctrl_tx_buf;\n--\ndrivers/net/ethernet/oa_tc6.c=260=static void oa_tc6_copy_ctrl_read_data(struct oa_tc6 *tc6, u32 value[],\n--\ndrivers/net/ethernet/oa_tc6.c-262-{\ndrivers/net/ethernet/oa_tc6.c:263:\t__be32 *rx_buf = tc6-\u003espi_ctrl_rx_buf + OA_TC6_CTRL_IGNORED_SIZE +\ndrivers/net/ethernet/oa_tc6.c:264:\t\t\t OA_TC6_CTRL_HEADER_SIZE;\ndrivers/net/ethernet/oa_tc6.c-265-\n--\ndrivers/net/ethernet/oa_tc6.c=275=static int oa_tc6_perform_ctrl(struct oa_tc6 *tc6, u32 address, u32 value[],\n--\ndrivers/net/ethernet/oa_tc6.c-286-\t/* Perform SPI transfer */\ndrivers/net/ethernet/oa_tc6.c:287:\tret = oa_tc6_spi_transfer(tc6, OA_TC6_CTRL_HEADER, size);\ndrivers/net/ethernet/oa_tc6.c-288-\tif (ret) {\n--\ndrivers/net/ethernet/oa_tc6.c-294-\t/* Check echoed/received control write command reply for errors */\ndrivers/net/ethernet/oa_tc6.c:295:\tif (reg_op == OA_TC6_CTRL_REG_WRITE)\ndrivers/net/ethernet/oa_tc6.c-296-\t\treturn oa_tc6_check_ctrl_write_reply(tc6, size);\n--\ndrivers/net/ethernet/oa_tc6.c=319=int oa_tc6_read_registers(struct oa_tc6 *tc6, u32 address, u32 value[],\n--\ndrivers/net/ethernet/oa_tc6.c-323-\ndrivers/net/ethernet/oa_tc6.c:324:\tif (!length || length \u003e OA_TC6_CTRL_MAX_REGISTERS) {\ndrivers/net/ethernet/oa_tc6.c-325-\t\tdev_err(\u0026tc6-\u003espi-\u003edev, \"Invalid register length parameter\\n\");\n--\ndrivers/net/ethernet/oa_tc6.c-330-\tret = oa_tc6_perform_ctrl(tc6, address, value, length,\ndrivers/net/ethernet/oa_tc6.c:331:\t\t\t\t  OA_TC6_CTRL_REG_READ);\ndrivers/net/ethernet/oa_tc6.c-332-\tmutex_unlock(\u0026tc6-\u003espi_ctrl_lock);\n--\ndrivers/net/ethernet/oa_tc6.c=362=int oa_tc6_read_register_mms(struct oa_tc6 *tc6, u8 mms, u16 address,\n--\ndrivers/net/ethernet/oa_tc6.c-366-\ndrivers/net/ethernet/oa_tc6.c:367:\tmms_reg = FIELD_PREP(OA_TC6_REG_MMS_MASK, mms) | address;\ndrivers/net/ethernet/oa_tc6.c-368-\n--\ndrivers/net/ethernet/oa_tc6.c=384=int oa_tc6_write_registers(struct oa_tc6 *tc6, u32 address, u32 value[],\n--\ndrivers/net/ethernet/oa_tc6.c-388-\ndrivers/net/ethernet/oa_tc6.c:389:\tif (!length || length \u003e OA_TC6_CTRL_MAX_REGISTERS) {\ndrivers/net/ethernet/oa_tc6.c-390-\t\tdev_err(\u0026tc6-\u003espi-\u003edev, \"Invalid register length parameter\\n\");\n--\ndrivers/net/ethernet/oa_tc6.c-395-\tret = oa_tc6_perform_ctrl(tc6, address, value, length,\ndrivers/net/ethernet/oa_tc6.c:396:\t\t\t\t  OA_TC6_CTRL_REG_WRITE);\ndrivers/net/ethernet/oa_tc6.c-397-\tmutex_unlock(\u0026tc6-\u003espi_ctrl_lock);\n--\ndrivers/net/ethernet/oa_tc6.c=427=int oa_tc6_write_register_mms(struct oa_tc6 *tc6, u8 mms, u16 address,\n--\ndrivers/net/ethernet/oa_tc6.c-431-\ndrivers/net/ethernet/oa_tc6.c:432:\tmms_reg = FIELD_PREP(OA_TC6_REG_MMS_MASK, mms) | address;\ndrivers/net/ethernet/oa_tc6.c-433-\n--\ndrivers/net/ethernet/oa_tc6.c=438=static int oa_tc6_check_phy_reg_direct_access_capability(struct oa_tc6 *tc6)\n--\ndrivers/net/ethernet/oa_tc6.c-442-\ndrivers/net/ethernet/oa_tc6.c:443:\tret = oa_tc6_read_register(tc6, OA_TC6_REG_STDCAP, \u0026regval);\ndrivers/net/ethernet/oa_tc6.c-444-\tif (ret)\n--\ndrivers/net/ethernet/oa_tc6.c-446-\ndrivers/net/ethernet/oa_tc6.c:447:\tif (!(regval \u0026 OA_TC6_STDCAP_DIRECT_PHY_REG_ACCESS))\ndrivers/net/ethernet/oa_tc6.c-448-\t\treturn -ENODEV;\n--\ndrivers/net/ethernet/oa_tc6.c=458=static int oa_tc6_mdiobus_read(struct mii_bus *bus, int addr, int regnum)\n--\ndrivers/net/ethernet/oa_tc6.c-463-\ndrivers/net/ethernet/oa_tc6.c:464:\tret = oa_tc6_read_register(tc6, OA_TC6_PHY_STD_REG_ADDR_BASE |\ndrivers/net/ethernet/oa_tc6.c:465:\t\t\t\t   (regnum \u0026 OA_TC6_PHY_STD_REG_ADDR_MASK),\ndrivers/net/ethernet/oa_tc6.c-466-\t\t\t\t   \u0026regval);\n--\ndrivers/net/ethernet/oa_tc6.c=473=static int oa_tc6_mdiobus_write(struct mii_bus *bus, int addr, int regnum,\n--\ndrivers/net/ethernet/oa_tc6.c-477-\ndrivers/net/ethernet/oa_tc6.c:478:\treturn oa_tc6_write_register(tc6, OA_TC6_PHY_STD_REG_ADDR_BASE |\ndrivers/net/ethernet/oa_tc6.c:479:\t\t\t\t     (regnum \u0026 OA_TC6_PHY_STD_REG_ADDR_MASK),\ndrivers/net/ethernet/oa_tc6.c-480-\t\t\t\t     val);\n--\ndrivers/net/ethernet/oa_tc6.c=483=static int oa_tc6_get_phy_c45_mms(int devnum)\n--\ndrivers/net/ethernet/oa_tc6.c-486-\tcase MDIO_MMD_PCS:\ndrivers/net/ethernet/oa_tc6.c:487:\t\treturn OA_TC6_PHY_C45_PCS_MMS2;\ndrivers/net/ethernet/oa_tc6.c-488-\tcase MDIO_MMD_PMAPMD:\ndrivers/net/ethernet/oa_tc6.c:489:\t\treturn OA_TC6_PHY_C45_PMA_PMD_MMS3;\ndrivers/net/ethernet/oa_tc6.c-490-\tcase MDIO_MMD_VEND2:\ndrivers/net/ethernet/oa_tc6.c:491:\t\treturn OA_TC6_PHY_C45_VS_PLCA_MMS4;\ndrivers/net/ethernet/oa_tc6.c-492-\tcase MDIO_MMD_AN:\ndrivers/net/ethernet/oa_tc6.c:493:\t\treturn OA_TC6_PHY_C45_AUTO_NEG_MMS5;\ndrivers/net/ethernet/oa_tc6.c-494-\tcase MDIO_MMD_POWER_UNIT:\ndrivers/net/ethernet/oa_tc6.c:495:\t\treturn OA_TC6_PHY_C45_POWER_UNIT_MMS6;\ndrivers/net/ethernet/oa_tc6.c-496-\tdefault:\n--\ndrivers/net/ethernet/oa_tc6.c=573=static int oa_tc6_mdiobus_register(struct oa_tc6 *tc6)\n--\ndrivers/net/ethernet/oa_tc6.c-603-\ndrivers/net/ethernet/oa_tc6.c:604:\tif (tc6-\u003equirk_flags \u0026 OA_TC6_PHY_INT) {\ndrivers/net/ethernet/oa_tc6.c-605-\t\tret = oa_tc6_phy_irq_setup(tc6);\n--\ndrivers/net/ethernet/oa_tc6.c-620-\t\tnetdev_err(tc6-\u003enetdev, \"Could not register MDIO bus\\n\");\ndrivers/net/ethernet/oa_tc6.c:621:\t\tif (tc6-\u003equirk_flags \u0026 OA_TC6_PHY_INT)\ndrivers/net/ethernet/oa_tc6.c-622-\t\t\toa_tc6_phy_irq_teardown(tc6);\n--\ndrivers/net/ethernet/oa_tc6.c=630=static void oa_tc6_mdiobus_unregister(struct oa_tc6 *tc6)\n--\ndrivers/net/ethernet/oa_tc6.c-632-\tmdiobus_unregister(tc6-\u003emdiobus);\ndrivers/net/ethernet/oa_tc6.c:633:\tif (tc6-\u003equirk_flags \u0026 OA_TC6_PHY_INT)\ndrivers/net/ethernet/oa_tc6.c-634-\t\toa_tc6_phy_irq_teardown(tc6);\n--\ndrivers/net/ethernet/oa_tc6.c=638=static int oa_tc6_phy_init(struct oa_tc6 *tc6)\n--\ndrivers/net/ethernet/oa_tc6.c-641-\ndrivers/net/ethernet/oa_tc6.c:642:\tif (tc6-\u003equirk_flags \u0026 OA_TC6_BROKEN_PHY)\ndrivers/net/ethernet/oa_tc6.c-643-\t\treturn 0;\n--\ndrivers/net/ethernet/oa_tc6.c=679=static void oa_tc6_phy_exit(struct oa_tc6 *tc6)\ndrivers/net/ethernet/oa_tc6.c-680-{\ndrivers/net/ethernet/oa_tc6.c:681:\tif (tc6-\u003equirk_flags \u0026 OA_TC6_BROKEN_PHY)\ndrivers/net/ethernet/oa_tc6.c-682-\t\treturn;\n--\ndrivers/net/ethernet/oa_tc6.c=688=static int oa_tc6_read_status0(struct oa_tc6 *tc6)\n--\ndrivers/net/ethernet/oa_tc6.c-692-\ndrivers/net/ethernet/oa_tc6.c:693:\tret = oa_tc6_read_register(tc6, OA_TC6_REG_STATUS0, \u0026regval);\ndrivers/net/ethernet/oa_tc6.c-694-\tif (ret) {\n--\ndrivers/net/ethernet/oa_tc6.c=703=static int oa_tc6_sw_reset_macphy(struct oa_tc6 *tc6)\ndrivers/net/ethernet/oa_tc6.c-704-{\ndrivers/net/ethernet/oa_tc6.c:705:\tu32 regval = OA_TC6_RESET_SWRESET;\ndrivers/net/ethernet/oa_tc6.c-706-\tint ret;\ndrivers/net/ethernet/oa_tc6.c-707-\ndrivers/net/ethernet/oa_tc6.c:708:\tret = oa_tc6_write_register(tc6, OA_TC6_REG_RESET, regval);\ndrivers/net/ethernet/oa_tc6.c-709-\tif (ret)\n--\ndrivers/net/ethernet/oa_tc6.c-713-\tret = readx_poll_timeout(oa_tc6_read_status0, tc6, regval,\ndrivers/net/ethernet/oa_tc6.c:714:\t\t\t\t regval \u0026 OA_TC6_STATUS0_RESETC,\ndrivers/net/ethernet/oa_tc6.c-715-\t\t\t\t STATUS0_RESETC_POLL_DELAY,\n--\ndrivers/net/ethernet/oa_tc6.c-720-\t/* Clear the reset complete status */\ndrivers/net/ethernet/oa_tc6.c:721:\treturn oa_tc6_write_register(tc6, OA_TC6_REG_STATUS0, regval);\ndrivers/net/ethernet/oa_tc6.c-722-}\n--\ndrivers/net/ethernet/oa_tc6.c=724=static int oa_tc6_unmask_interrupts(struct oa_tc6 *tc6)\n--\ndrivers/net/ethernet/oa_tc6.c-728-\ndrivers/net/ethernet/oa_tc6.c:729:\tret = oa_tc6_read_register(tc6, OA_TC6_REG_INT_MASK0, \u0026regval);\ndrivers/net/ethernet/oa_tc6.c-730-\tif (ret)\n--\ndrivers/net/ethernet/oa_tc6.c-732-\ndrivers/net/ethernet/oa_tc6.c:733:\tregval \u0026= ~(OA_TC6_INT_MASK0_PHY_INT_MASK |\ndrivers/net/ethernet/oa_tc6.c:734:\t\t    OA_TC6_INT_MASK0_TX_PROTOCOL_ERR_MASK |\ndrivers/net/ethernet/oa_tc6.c:735:\t\t    OA_TC6_INT_MASK0_RX_BUFFER_OVERFLOW_ERR_MASK |\ndrivers/net/ethernet/oa_tc6.c:736:\t\t    OA_TC6_INT_MASK0_LOSS_OF_FRAME_ERR_MASK |\ndrivers/net/ethernet/oa_tc6.c:737:\t\t    OA_TC6_INT_MASK0_HEADER_ERR_MASK);\ndrivers/net/ethernet/oa_tc6.c-738-\ndrivers/net/ethernet/oa_tc6.c:739:\treturn oa_tc6_write_register(tc6, OA_TC6_REG_INT_MASK0, regval);\ndrivers/net/ethernet/oa_tc6.c-740-}\n--\ndrivers/net/ethernet/oa_tc6.c=742=static int oa_tc6_enable_data_transfer(struct oa_tc6 *tc6)\n--\ndrivers/net/ethernet/oa_tc6.c-746-\ndrivers/net/ethernet/oa_tc6.c:747:\tret = oa_tc6_read_register(tc6, OA_TC6_REG_CONFIG0, \u0026value);\ndrivers/net/ethernet/oa_tc6.c-748-\tif (ret)\n--\ndrivers/net/ethernet/oa_tc6.c-751-\t/* Enable configuration synchronization for data transfer */\ndrivers/net/ethernet/oa_tc6.c:752:\tvalue |= OA_TC6_CONFIG0_SYNC;\ndrivers/net/ethernet/oa_tc6.c-753-\ndrivers/net/ethernet/oa_tc6.c:754:\treturn oa_tc6_write_register(tc6, OA_TC6_REG_CONFIG0, value);\ndrivers/net/ethernet/oa_tc6.c-755-}\n--\ndrivers/net/ethernet/oa_tc6.c=825=static void oa_tc6_disable_traffic(struct oa_tc6 *tc6)\ndrivers/net/ethernet/oa_tc6.c-826-{\ndrivers/net/ethernet/oa_tc6.c:827:\tu32 regval = OA_TC6_INT_MASK0_ALL_INTERRUPTS;\ndrivers/net/ethernet/oa_tc6.c-828-\tstruct sk_buff *skb;\n--\ndrivers/net/ethernet/oa_tc6.c-840-\toa_tc6_free_ongoing_skbs(tc6);\ndrivers/net/ethernet/oa_tc6.c:841:\toa_tc6_write_register(tc6, OA_TC6_REG_INT_MASK0, regval);\ndrivers/net/ethernet/oa_tc6.c:842:\toa_tc6_read_register(tc6, OA_TC6_REG_STATUS0, \u0026regval);\ndrivers/net/ethernet/oa_tc6.c:843:\toa_tc6_write_register(tc6, OA_TC6_REG_STATUS0, regval);\ndrivers/net/ethernet/oa_tc6.c-844-\tdev_err(\u0026tc6-\u003espi-\u003edev, \"Device interrupt disabled to avoid interrupt storm\");\n--\ndrivers/net/ethernet/oa_tc6.c=847=static int oa_tc6_process_extended_status(struct oa_tc6 *tc6)\n--\ndrivers/net/ethernet/oa_tc6.c-851-\ndrivers/net/ethernet/oa_tc6.c:852:\tret = oa_tc6_read_register(tc6, OA_TC6_REG_STATUS0, \u0026value);\ndrivers/net/ethernet/oa_tc6.c-853-\tif (ret) {\n--\ndrivers/net/ethernet/oa_tc6.c-866-\t/* Clear the error interrupts status */\ndrivers/net/ethernet/oa_tc6.c:867:\tret = oa_tc6_write_register(tc6, OA_TC6_REG_STATUS0, value);\ndrivers/net/ethernet/oa_tc6.c-868-\tif (ret) {\n--\ndrivers/net/ethernet/oa_tc6.c-878-\t */\ndrivers/net/ethernet/oa_tc6.c:879:\tif ((tc6-\u003equirk_flags \u0026 OA_TC6_PHY_INT) \u0026\u0026\ndrivers/net/ethernet/oa_tc6.c:880:\t    FIELD_GET(OA_TC6_STATUS0_PHY_INT, value))\ndrivers/net/ethernet/oa_tc6.c-881-\t\thandle_nested_irq(tc6-\u003ephy_virq);\ndrivers/net/ethernet/oa_tc6.c-882-\ndrivers/net/ethernet/oa_tc6.c:883:\tif (FIELD_GET(OA_TC6_STATUS0_RX_BUFFER_OVERFLOW_ERROR, value)) {\ndrivers/net/ethernet/oa_tc6.c-884-\t\toa_tc6_look_for_new_frame(tc6);\n--\ndrivers/net/ethernet/oa_tc6.c-888-\t}\ndrivers/net/ethernet/oa_tc6.c:889:\tif (FIELD_GET(OA_TC6_STATUS0_TX_PROTOCOL_ERROR, value)) {\ndrivers/net/ethernet/oa_tc6.c-890-\t\tnetdev_err(tc6-\u003enetdev, \"Transmit protocol error\\n\");\n--\ndrivers/net/ethernet/oa_tc6.c-895-\t */\ndrivers/net/ethernet/oa_tc6.c:896:\tif (FIELD_GET(OA_TC6_STATUS0_LOSS_OF_FRAME_ERROR, value)) {\ndrivers/net/ethernet/oa_tc6.c-897-\t\tnetdev_err(tc6-\u003enetdev, \"Loss of frame error\\n\");\n--\ndrivers/net/ethernet/oa_tc6.c-899-\t}\ndrivers/net/ethernet/oa_tc6.c:900:\tif (FIELD_GET(OA_TC6_STATUS0_HEADER_ERROR, value)) {\ndrivers/net/ethernet/oa_tc6.c-901-\t\tnetdev_err(tc6-\u003enetdev, \"Header error\\n\");\n--\ndrivers/net/ethernet/oa_tc6.c=908=static int oa_tc6_process_rx_chunk_footer(struct oa_tc6 *tc6, u32 footer)\n--\ndrivers/net/ethernet/oa_tc6.c-916-\t */\ndrivers/net/ethernet/oa_tc6.c:917:\ttc6-\u003etx_credits = FIELD_GET(OA_TC6_DATA_FOOTER_TX_CREDITS, footer);\ndrivers/net/ethernet/oa_tc6.c:918:\ttc6-\u003erx_chunks_available = FIELD_GET(OA_TC6_DATA_FOOTER_RX_CHUNKS,\ndrivers/net/ethernet/oa_tc6.c-919-\t\t\t\t\t     footer);\ndrivers/net/ethernet/oa_tc6.c-920-\ndrivers/net/ethernet/oa_tc6.c:921:\tif (FIELD_GET(OA_TC6_DATA_FOOTER_EXTENDED_STS, footer)) {\ndrivers/net/ethernet/oa_tc6.c-922-\t\tret = oa_tc6_process_extended_status(tc6);\n--\ndrivers/net/ethernet/oa_tc6.c-933-\t */\ndrivers/net/ethernet/oa_tc6.c:934:\tif (FIELD_GET(OA_TC6_DATA_FOOTER_RXD_HEADER_BAD, footer)) {\ndrivers/net/ethernet/oa_tc6.c-935-\t\tnetdev_err(tc6-\u003enetdev, \"Rxd header bad error\\n\");\n--\ndrivers/net/ethernet/oa_tc6.c-938-\ndrivers/net/ethernet/oa_tc6.c:939:\tif (!FIELD_GET(OA_TC6_DATA_FOOTER_CONFIG_SYNC, footer)) {\ndrivers/net/ethernet/oa_tc6.c-940-\t\tnetdev_err(tc6-\u003enetdev, \"Config unsync error\\n\");\n--\ndrivers/net/ethernet/oa_tc6.c=1047=static int oa_tc6_prcs_ongoing_rx_frame(struct oa_tc6 *tc6, u8 *payload,\n--\ndrivers/net/ethernet/oa_tc6.c-1050-\treturn oa_tc6_update_rx_skb(tc6, payload,\ndrivers/net/ethernet/oa_tc6.c:1051:\t\t\t\t    OA_TC6_CHUNK_PAYLOAD_SIZE);\ndrivers/net/ethernet/oa_tc6.c-1052-}\n--\ndrivers/net/ethernet/oa_tc6.c=1054=static int oa_tc6_prcs_rx_chunk_payload(struct oa_tc6 *tc6, u8 *data,\n--\ndrivers/net/ethernet/oa_tc6.c-1056-{\ndrivers/net/ethernet/oa_tc6.c:1057:\tu8 start_byte_offset = FIELD_GET(OA_TC6_DATA_FOOTER_START_WORD_OFFSET,\ndrivers/net/ethernet/oa_tc6.c-1058-\t\t\t\t\t footer) * sizeof(u32);\ndrivers/net/ethernet/oa_tc6.c:1059:\tu8 end_byte_offset = FIELD_GET(OA_TC6_DATA_FOOTER_END_BYTE_OFFSET,\ndrivers/net/ethernet/oa_tc6.c-1060-\t\t\t\t       footer);\ndrivers/net/ethernet/oa_tc6.c:1061:\tbool start_valid = FIELD_GET(OA_TC6_DATA_FOOTER_START_VALID, footer);\ndrivers/net/ethernet/oa_tc6.c:1062:\tbool end_valid = FIELD_GET(OA_TC6_DATA_FOOTER_END_VALID, footer);\ndrivers/net/ethernet/oa_tc6.c-1063-\tu16 size;\n--\ndrivers/net/ethernet/oa_tc6.c-1081-\tif (start_valid \u0026\u0026 !end_valid) {\ndrivers/net/ethernet/oa_tc6.c:1082:\t\tsize = OA_TC6_CHUNK_PAYLOAD_SIZE - start_byte_offset;\ndrivers/net/ethernet/oa_tc6.c-1083-\t\treturn oa_tc6_prcs_rx_frame_start(tc6,\n--\ndrivers/net/ethernet/oa_tc6.c-1114-\t\t}\ndrivers/net/ethernet/oa_tc6.c:1115:\t\tsize = OA_TC6_CHUNK_PAYLOAD_SIZE - start_byte_offset;\ndrivers/net/ethernet/oa_tc6.c-1116-\t\treturn oa_tc6_prcs_rx_frame_start(tc6,\n--\ndrivers/net/ethernet/oa_tc6.c=1135=static int oa_tc6_process_spi_data_rx_buf(struct oa_tc6 *tc6, u16 length)\ndrivers/net/ethernet/oa_tc6.c-1136-{\ndrivers/net/ethernet/oa_tc6.c:1137:\tu16 no_of_rx_chunks = length / OA_TC6_CHUNK_SIZE;\ndrivers/net/ethernet/oa_tc6.c-1138-\tbool retry = false;\n--\ndrivers/net/ethernet/oa_tc6.c-1144-\t\t/* Last 4 bytes in each received chunk consist footer info */\ndrivers/net/ethernet/oa_tc6.c:1145:\t\tfooter = oa_tc6_get_rx_chunk_footer(tc6, i * OA_TC6_CHUNK_SIZE +\ndrivers/net/ethernet/oa_tc6.c:1146:\t\t\t\t\t\t    OA_TC6_CHUNK_PAYLOAD_SIZE);\ndrivers/net/ethernet/oa_tc6.c-1147-\n--\ndrivers/net/ethernet/oa_tc6.c-1158-\t\t */\ndrivers/net/ethernet/oa_tc6.c:1159:\t\tif (FIELD_GET(OA_TC6_DATA_FOOTER_DATA_VALID, footer)) {\ndrivers/net/ethernet/oa_tc6.c-1160-\t\t\tu8 *payload = tc6-\u003espi_data_rx_buf + i *\ndrivers/net/ethernet/oa_tc6.c:1161:\t\t\t\t      OA_TC6_CHUNK_SIZE;\ndrivers/net/ethernet/oa_tc6.c-1162-\n--\ndrivers/net/ethernet/oa_tc6.c=1196=static __be32 oa_tc6_prepare_data_header(bool data_valid, bool start_valid,\n--\ndrivers/net/ethernet/oa_tc6.c-1198-{\ndrivers/net/ethernet/oa_tc6.c:1199:\tu32 header = FIELD_PREP(OA_TC6_DATA_HEADER_DATA_NOT_CTRL,\ndrivers/net/ethernet/oa_tc6.c:1200:\t\t\t\tOA_TC6_DATA_HEADER) |\ndrivers/net/ethernet/oa_tc6.c:1201:\t\t     FIELD_PREP(OA_TC6_DATA_HEADER_DATA_VALID, data_valid) |\ndrivers/net/ethernet/oa_tc6.c:1202:\t\t     FIELD_PREP(OA_TC6_DATA_HEADER_START_VALID, start_valid) |\ndrivers/net/ethernet/oa_tc6.c:1203:\t\t     FIELD_PREP(OA_TC6_DATA_HEADER_END_VALID, end_valid) |\ndrivers/net/ethernet/oa_tc6.c:1204:\t\t     FIELD_PREP(OA_TC6_DATA_HEADER_END_BYTE_OFFSET,\ndrivers/net/ethernet/oa_tc6.c-1205-\t\t\t\tend_byte_offset);\ndrivers/net/ethernet/oa_tc6.c-1206-\ndrivers/net/ethernet/oa_tc6.c:1207:\theader |= FIELD_PREP(OA_TC6_DATA_HEADER_PARITY,\ndrivers/net/ethernet/oa_tc6.c-1208-\t\t\t     oa_tc6_get_parity(header));\n--\ndrivers/net/ethernet/oa_tc6.c=1213=static void oa_tc6_add_tx_skb_to_spi_buf(struct oa_tc6 *tc6)\ndrivers/net/ethernet/oa_tc6.c-1214-{\ndrivers/net/ethernet/oa_tc6.c:1215:\tenum oa_tc6_data_end_valid_info end_valid = OA_TC6_DATA_END_INVALID;\ndrivers/net/ethernet/oa_tc6.c-1216-\t__be32 *tx_buf = tc6-\u003espi_data_tx_buf + tc6-\u003espi_data_tx_buf_offset;\n\n"
}

							input: 33595
							output: 32
							thoughts: 25

Here's my thought process, as if I were considering this myself:

**Investigating the MICROCHIP_T1S_PHY Configuration**

Okay, so I need to figure out where the configuration option `MICROCHIP_T1S_PHY` is defined. My first instinct, given its nature as a PHY (physical layer) driver, is to check the `Kconfig` file within the network driver's directory. Specifically, I should look in `drivers/net/phy/Kconfig`. This file usually handles all the PHY-related configuration options. That's the most logical place to start digging for the `MICROCHIP_T1S_PHY` definition. Let's see what's in there.

{
  "Expression": "MICROCHIP_T1S",
  "PathPrefix": "drivers/net/phy"
}

{
  "Output": "drivers/net/phy/Kconfig=323=config MICREL_PHY\n--\ndrivers/net/phy/Kconfig-329-\ndrivers/net/phy/Kconfig:330:config MICROCHIP_T1S_PHY\ndrivers/net/phy/Kconfig-331-\ttristate \"Microchip 10BASE-T1S Ethernet PHYs\"\n--\ndrivers/net/phy/Makefile=82=obj-$(CONFIG_MICROCHIP_T1_PHY)\t+= microchip_t1.o\ndrivers/net/phy/Makefile:83:obj-$(CONFIG_MICROCHIP_T1S_PHY) += microchip_t1s.o\ndrivers/net/phy/Makefile-84-obj-$(CONFIG_MICROSEMI_PHY)\t+= mscc/\n"
}

							input: 34012
							output: 44
							thoughts: 24

Here's my take on those thoughts, tailored for an expert audience:

**Kconfig Dive for LAN865x Ethernet Drivers**

Okay, time to get my hands dirty. Let's start with the `Kconfig` file for the LAN865x Ethernet drivers. That's the logical first stop. I need to understand what configuration options are available and how they're structured within the build system. I'm looking for things like:

*   **Feature Flags:** Are there conditional build options for things like specific PHY configurations, interrupt modes (polling, interrupt-driven, etc.), or DMA support?
*   **Dependencies:** What other kernel components or drivers need to be enabled for the LAN865x driver to function correctly? Are there specific dependencies on network stack features or MAC address management?
*   **Defaults and Help Text:** What are the default settings for each option? And, of course, the helpful descriptions that will guide developers. The comments have to be clear and concise.
*   **Architecture-Specific Selections:** Does the Kconfig expose any architecture specific selections like cache line sizes or memory regions?

I'm hoping this Kconfig is well-organized, with a clear hierarchy that reflects the logical structure of the driver and its capabilities. It's often where the story of the driver's configuration begins. I'm keen to see if any new features have been added or if some of the existing options have changed. Let's see what we've got.

{
  "File": "drivers/net/ethernet/microchip/lan865x/Kconfig",
  "FirstLine": 1,
  "LineCount": 30
}

{
  "Contents": "   1:\t# SPDX-License-Identifier: GPL-2.0-only\n   2:\t#\n   3:\t# Microchip LAN865x Driver Support\n   4:\t#\n   5:\t\n   6:\tif NET_VENDOR_MICROCHIP\n   7:\t\n   8:\tconfig LAN865X\n   9:\t\ttristate \"LAN865x support\"\n  10:\t\tdepends on SPI\n  11:\t\tselect OA_TC6\n  12:\t\thelp\n  13:\t\t  Support for the Microchip LAN8650/1 Rev.B0/B1 MACPHY Ethernet chip. It\n  14:\t\t  uses OPEN Alliance 10BASE-T1x Serial Interface specification.\n  15:\t\n  16:\t\t  To compile this driver as a module, choose M here. The module will be\n  17:\t\t  called lan865x.\n  18:\t\n  19:\tendif # NET_VENDOR_MICROCHIP\n"
}

							input: 34650
							output: 37
							thoughts: 27

Here's my thought process, as requested:

**Navigating the Kconfig Labyrinth**

Okay, so I need to find the configuration options related to OA_TC6. My instinct is to head straight to `drivers/net/ethernet/Kconfig`, as that's the most logical place to start digging for Ethernet-related configurations. I vaguely recall that type of option often being defined around line 149. Time to fire up my editor and take a look. Let's see what gems are hidden in that particular section...hopefully the author was kind enough to organize things in a clear manner.

{
  "File": "drivers/net/ethernet/Kconfig",
  "FirstLine": 145,
  "LineCount": 25
}

{
  "Contents": " 145:\t\tselect BITREVERSE\n 146:\t\thelp\n 147:\t\t  Say Y here if you want to use the OpenCores 10/100 Mbps Ethernet MAC.\n 148:\t\n 149:\tconfig OA_TC6\n 150:\t\ttristate \"OPEN Alliance TC6 10BASE-T1x MAC-PHY support\" if COMPILE_TEST\n 151:\t\tdepends on SPI\n 152:\t\tselect PHYLIB\n 153:\t\thelp\n 154:\t\t  This library implements OPEN Alliance TC6 10BASE-T1x MAC-PHY\n 155:\t\t  Serial Interface protocol for supporting 10BASE-T1x MAC-PHYs.\n 156:\t\n 157:\t\t  To know the implementation details, refer documentation in\n 158:\t\t  \u003cfile:Documentation/networking/oa-tc6-framework.rst\u003e.\n 159:\t\n 160:\tsource \"drivers/net/ethernet/pasemi/Kconfig\"\n 161:\tsource \"drivers/net/ethernet/pensando/Kconfig\"\n 162:\tsource \"drivers/net/ethernet/qlogic/Kconfig\"\n 163:\tsource \"drivers/net/ethernet/brocade/Kconfig\"\n 164:\tsource \"drivers/net/ethernet/qualcomm/Kconfig\"\n 165:\tsource \"drivers/net/ethernet/rdc/Kconfig\"\n 166:\tsource \"drivers/net/ethernet/realtek/Kconfig\"\n 167:\tsource \"drivers/net/ethernet/renesas/Kconfig\"\n 168:\tsource \"drivers/net/ethernet/rocker/Kconfig\"\n 169:\tsource \"drivers/net/ethernet/samsung/Kconfig\"\n"
}

							input: 35313
							output: 26
							thoughts: 612

**My Assessment of LAN865X/OA_TC6/MICROCHIP_T1S Reachability in Syzkaller**

Okay, let's break this down. My goal is to determine if I can actually fuzz these drivers – LAN865X, OA_TC6, and MICROCHIP_T1S – using syzkaller. The core question is: are they reachable within the standard virtualized environments like QEMU and GCE that syzkaller leverages? This "reachability" is the key. Fuzzing unreachable code is a waste of resources.

First, I need to understand what these drivers *are*. LAN865X is a SPI driver (`struct spi_driver`), `lan865x_driver`. MICROCHIP_T1S is a PHY driver (`struct phy_driver`, `microchip_t1s_driver[]`). OA_TC6 is a supporting library for SPI MAC-PHYs used by `lan865x` and `adin1140`.

Now, the crucial question: can I instantiate or probe SPI and PHY devices within a typical QEMU x86_64 environment? That's the gatekeeper. Standard QEMU doesn't seem to have a generic SPI bus instantiation. Unless, there's some kind of mock SPI controller, USB-to-SPI adapter, platform device, or maybe even a configfs SPI device. Hmm, does Linux even let you instantiate SPI devices from userspace directly? Does QEMU even *have* SPI support by default?

Let me step back and check syzkaller's documentation or examples. Has it been used to test SPI devices before? What about how SPI devices are tested in general? Wait, there's that principle: REACHABILITY IS THE PRIMARY GATE. I need to be sure the code *can* execute in these environments. If it's structurally unreachable, don't fuzz it.

This brings me to Section 2. That lists examples of "structurally unreachable" hardware. Things like vendor-specific PCIe switches, SmartNICs, or GPU drivers that need dedicated hardware not emulated in standard QEMU. Also unreachable execution paths, like driver teardown callbacks (e.g., `.remove`, `.shutdown`, `pci_unregister_driver`) executed only during physical PCI hot-unplug or manual sysfs unbinding, and code paths specific to non-target architectures.

So, where do SPI and PHY drivers fit in? Can I even reach or probe LAN865x or Microchip PHYs? I have to figure out if syzkaller or standard QEMU can do that. Is there a "spi-mock," a "spi-controller," or some netlink or MDIO trick? I better search the kernel for any mention of SPI controllers or MDIO. Time to dig in and find out.

{
  "Expression": "lan8650",
  "PathPrefix": "drivers"
}

{
  "Output": "drivers/net/ethernet/microchip/lan865x/lan865x.c-12-\ndrivers/net/ethernet/microchip/lan865x/lan865x.c:13:#define DRV_NAME\t\t\t\"lan8650\"\ndrivers/net/ethernet/microchip/lan865x/lan865x.c-14-\n--\ndrivers/net/ethernet/microchip/lan865x/lan865x.c=430=static const struct spi_device_id lan865x_ids[] = {\ndrivers/net/ethernet/microchip/lan865x/lan865x.c:431:\t{ .name = \"lan8650\" },\ndrivers/net/ethernet/microchip/lan865x/lan865x.c-432-\t{ .name = \"lan8651\" },\n--\ndrivers/net/ethernet/microchip/lan865x/lan865x.c=437=static const struct of_device_id lan865x_dt_ids[] = {\ndrivers/net/ethernet/microchip/lan865x/lan865x.c:438:\t{ .compatible = \"microchip,lan8650\" },\ndrivers/net/ethernet/microchip/lan865x/lan865x.c-439-\t{ .compatible = \"microchip,lan8651\" },\n--\ndrivers/net/phy/microchip_t1s.c-6- *  lan8670/1/2 Rev.B1/C1/C2/D0\ndrivers/net/phy/microchip_t1s.c:7: *  lan8650/1 Rev.B0/B1 Internal PHYs\ndrivers/net/phy/microchip_t1s.c-8- */\n"
}

							input: 37042
							output: 26
							thoughts: 218

**My Initial Assessment of the LAN865x Drivers**

Okay, so I'm looking at `lan865x`, which is clearly an SPI driver tailored for those Microchip LAN8650/1 chips. Then there's `microchip_t1s`, which I immediately recognize as an MDIO PHY driver, specifically for the LAN867x/LAN865x ethernet PHYs. And finally, `oa_tc6` – that's the OPEN Alliance TC6 library; the 10BASE-T1x MAC-PHY support that both `lan865x` and the `adin1140` SPI ethernet controllers leverage.

Now, my mind starts to wander. I have to think about potential scenarios. Are we talking strictly physical hardware here, or are there virtual devices in play? Can we possibly have virtual SPI or MDIO devices that *attach* to this, or could we somehow create a virtual instance of `lan8650` or `microchip_t1s`? That would definitely change the landscape.

My next step has to be a deeper investigation. I'm going to quickly check if syzkaller has any pseudo-syscalls or if there are any obvious userspace interfaces that allow us to bind SPI or PHY devices. I need to know if this is fundamentally limited to physical hardware or if there's any flexibility. I have to think about how SPI devices are typically managed and created in the kernel – are there sysfs, configfs, ioctl mechanisms, or similar methods that might be relevant? Time to dive into `drivers/spi/` and start digging.

{
  "Expression": "new_device",
  "PathPrefix": "drivers/spi"
}

{
  "Output": "drivers/spi/spi-altera-dfl.c=124=static int dfl_spi_altera_probe(struct dfl_device *dfl_dev)\n--\ndrivers/spi/spi-altera-dfl.c-174-\ndrivers/spi/spi-altera-dfl.c:175:\tif (!spi_new_device(host, \u0026board_info)) {\ndrivers/spi/spi-altera-dfl.c-176-\t\tdev_err(dev, \"%s failed to create SPI device: %s\\n\",\n--\ndrivers/spi/spi-altera-platform.c=35=static int altera_spi_probe(struct platform_device *pdev)\n--\ndrivers/spi/spi-altera-platform.c-116-\t\tfor (i = 0; i \u003c pdata-\u003enum_devices; i++) {\ndrivers/spi/spi-altera-platform.c:117:\t\t\tif (!spi_new_device(host, pdata-\u003edevices + i))\ndrivers/spi/spi-altera-platform.c-118-\t\t\t\tdev_warn(\u0026pdev-\u003edev,\n--\ndrivers/spi/spi-butterfly.c=176=static void butterfly_attach(struct parport *p)\n--\ndrivers/spi/spi-butterfly.c-265-\tpp-\u003einfo[0].controller_data = pp;\ndrivers/spi/spi-butterfly.c:266:\tpp-\u003edataflash = spi_new_device(pp-\u003ebitbang.ctlr, \u0026pp-\u003einfo[0]);\ndrivers/spi/spi-butterfly.c-267-\tif (pp-\u003edataflash)\n--\ndrivers/spi/spi-ch341.c=141=static int ch341_probe(struct usb_interface *intf,\n--\ndrivers/spi/spi-ch341.c-206-\ndrivers/spi/spi-ch341.c:207:\tch341-\u003espidev = spi_new_device(ctrl, \u0026chip);\ndrivers/spi/spi-ch341.c-208-\tif (!ch341-\u003espidev) {\n--\ndrivers/spi/spi-cs42l43.c=312=static int cs42l43_spi_probe(struct platform_device *pdev)\n--\ndrivers/spi/spi-cs42l43.c-426-\ndrivers/spi/spi-cs42l43.c:427:\t\tif (!spi_new_device(priv-\u003ectlr, ampl_info))\ndrivers/spi/spi-cs42l43.c-428-\t\t\treturn dev_err_probe(priv-\u003edev, -ENODEV,\n--\ndrivers/spi/spi-cs42l43.c-430-\ndrivers/spi/spi-cs42l43.c:431:\t\tif (!spi_new_device(priv-\u003ectlr, ampr_info))\ndrivers/spi/spi-cs42l43.c-432-\t\t\treturn dev_err_probe(priv-\u003edev, -ENODEV,\n--\ndrivers/spi/spi-intel.c=1375=static int intel_spi_populate_chip(struct intel_spi *ispi)\n--\ndrivers/spi/spi-intel.c-1401-\ndrivers/spi/spi-intel.c:1402:\tif (!spi_new_device(ispi-\u003ehost, \u0026chip))\ndrivers/spi/spi-intel.c-1403-\t\treturn -ENODEV;\n--\ndrivers/spi/spi-intel.c-1430-\ndrivers/spi/spi-intel.c:1431:\tif (!spi_new_device(ispi-\u003ehost, \u0026chip))\ndrivers/spi/spi-intel.c-1432-\t\treturn -ENODEV;\n--\ndrivers/spi/spi-kspi2.c=310=static int kspi2_register_devices(struct kspi2 *kspi)\n--\ndrivers/spi/spi-kspi2.c-316-\tfor (i = 0; i \u003c kspi-\u003eauxdev-\u003einfo_size; i++) {\ndrivers/spi/spi-kspi2.c:317:\t\tstruct spi_device *device = spi_new_device(kspi-\u003ehost, \u0026info[i]);\ndrivers/spi/spi-kspi2.c-318-\n--\ndrivers/spi/spi-lm70llp.c=188=static void spi_lm70llp_attach(struct parport *p)\n--\ndrivers/spi/spi-lm70llp.c-266-\tpp-\u003einfo.controller_data = pp;\ndrivers/spi/spi-lm70llp.c:267:\tpp-\u003espidev_lm70 = spi_new_device(pp-\u003ebitbang.ctlr, \u0026pp-\u003einfo);\ndrivers/spi/spi-lm70llp.c-268-\tif (pp-\u003espidev_lm70)\n--\ndrivers/spi/spi-lm70llp.c-271-\telse {\ndrivers/spi/spi-lm70llp.c:272:\t\tdev_warn(\u0026pd-\u003edev, \"spi_new_device failed\\n\");\ndrivers/spi/spi-lm70llp.c-273-\t\tstatus = -ENODEV;\n--\ndrivers/spi/spi-xilinx.c=402=static int xilinx_spi_probe(struct platform_device *pdev)\n--\ndrivers/spi/spi-xilinx.c-509-\t\tfor (i = 0; i \u003c pdata-\u003enum_devices; i++)\ndrivers/spi/spi-xilinx.c:510:\t\t\tspi_new_device(host, pdata-\u003edevices + i);\ndrivers/spi/spi-xilinx.c-511-\t}\n--\ndrivers/spi/spi.c=297=static const struct attribute_group spi_controller_statistics_group = {\n--\ndrivers/spi/spi.c-304-/*\ndrivers/spi/spi.c:305: * new_device_store - instantiate a new SPI device from userspace\ndrivers/spi/spi.c-306- *\n--\ndrivers/spi/spi.c-309- * Examples:\ndrivers/spi/spi.c:310: *   echo spidev 0 \u003e new_device\ndrivers/spi/spi.c:311: *   echo spidev 0 10000000 \u003e new_device\ndrivers/spi/spi.c:312: *   echo spidev 0 10000000 3 \u003e new_device\ndrivers/spi/spi.c-313- */\ndrivers/spi/spi.c=314=static ssize_t\ndrivers/spi/spi.c:315:new_device_store(struct device *dev, struct device_attribute *attr,\ndrivers/spi/spi.c-316-\t\t const char *buf, size_t count)\n--\ndrivers/spi/spi.c-329-\tif (!blank) {\ndrivers/spi/spi.c:330:\t\tdev_err(dev, \"new_device: Missing parameters\\n\");\ndrivers/spi/spi.c-331-\t\treturn -EINVAL;\n--\ndrivers/spi/spi.c-334-\tif (blank == buf || blank - buf \u003e SPI_NAME_SIZE - 1) {\ndrivers/spi/spi.c:335:\t\tdev_err(dev, \"new_device: Invalid device name\\n\");\ndrivers/spi/spi.c-336-\t\treturn -EINVAL;\n--\ndrivers/spi/spi.c-348-\tif (sscanf(++blank, \"%u %u %u\", \u0026chip_select, \u0026max_speed_hz, \u0026mode) \u003c 1) {\ndrivers/spi/spi.c:349:\t\tdev_err(dev, \"new_device: Can't parse chip select\\n\");\ndrivers/spi/spi.c-350-\t\treturn -EINVAL;\n--\ndrivers/spi/spi.c-359-\tif (chip_select \u003e U8_MAX || chip_select \u003e= ctlr-\u003enum_chipselect) {\ndrivers/spi/spi.c:360:\t\tdev_err(dev, \"new_device: Chip select %u out of range (num_chipselect=%u)\\n\",\ndrivers/spi/spi.c-361-\t\t\tchip_select, ctlr-\u003enum_chipselect);\n--\ndrivers/spi/spi.c-372-\tif (mode \u0026 ~(u32)SPI_MODE_USER_MASK) {\ndrivers/spi/spi.c:373:\t\tdev_err(dev, \"new_device: Invalid mode bits 0x%x\\n\",\ndrivers/spi/spi.c-374-\t\t\tmode \u0026 ~(u32)SPI_MODE_USER_MASK);\n--\ndrivers/spi/spi.c-401-\t/*\ndrivers/spi/spi.c:402:\t * spi_unregister_controller() removes the new_device/delete_device\ndrivers/spi/spi.c-403-\t * sysfs group before taking add_lock, so kernfs_drain() has already\n--\ndrivers/spi/spi.c-421-\ndrivers/spi/spi.c:422:\tdev_info(dev, \"new_device: Instantiated device %s at CS%u\\n\",\ndrivers/spi/spi.c-423-\t\t modalias, chip_select);\n--\ndrivers/spi/spi.c-425-}\ndrivers/spi/spi.c:426:static DEVICE_ATTR_IGNORE_LOCKDEP(new_device, 0200, NULL, new_device_store);\ndrivers/spi/spi.c-427-\n--\ndrivers/spi/spi.c=471=static struct attribute *spi_controller_userspace_attrs[] = {\ndrivers/spi/spi.c:472:\t\u0026dev_attr_new_device.attr,\ndrivers/spi/spi.c-473-\t\u0026dev_attr_delete_device.attr,\n--\ndrivers/spi/spi.c=477=static const struct attribute_group spi_controller_userspace_group = {\n--\ndrivers/spi/spi.c-484- * spi_controller_userspace_group is registered manually for host controllers\ndrivers/spi/spi.c:485: * at the end of spi_register_controller() so new_device/delete_device only\ndrivers/spi/spi.c-486- * appear after DT/ACPI children and the queue are set up.\n--\ndrivers/spi/spi.c=979=EXPORT_SYMBOL_GPL(spi_add_device);\n--\ndrivers/spi/spi.c-981-/**\ndrivers/spi/spi.c:982: * spi_new_device - instantiate one new SPI device\ndrivers/spi/spi.c-983- * @ctlr: Controller to which device is connected\n--\ndrivers/spi/spi.c-994- */\ndrivers/spi/spi.c:995:struct spi_device *spi_new_device(struct spi_controller *ctlr,\ndrivers/spi/spi.c-996-\t\t\t\t  struct spi_board_info *chip)\n--\ndrivers/spi/spi.c-1050-}\ndrivers/spi/spi.c:1051:EXPORT_SYMBOL_GPL(spi_new_device);\ndrivers/spi/spi.c-1052-\n--\ndrivers/spi/spi.c=1081=static void spi_match_controller_to_boardinfo(struct spi_controller *ctlr,\n--\ndrivers/spi/spi.c-1088-\ndrivers/spi/spi.c:1089:\tdev = spi_new_device(ctlr, bi);\ndrivers/spi/spi.c-1090-\tif (!dev)\n--\ndrivers/spi/spi.c=3652=int spi_register_controller(struct spi_controller *ctlr)\n--\ndrivers/spi/spi.c-3757-\t/*\ndrivers/spi/spi.c:3758:\t * Register the new_device/delete_device sysfs interface as the\ndrivers/spi/spi.c-3759-\t * final step of host controller bringup, only after the queue,\n--\ndrivers/spi/spi.c=3838=void spi_unregister_controller(struct spi_controller *ctlr)\n--\ndrivers/spi/spi.c-3843-\t/*\ndrivers/spi/spi.c:3844:\t * Drain in-flight new_device/delete_device sysfs stores and\ndrivers/spi/spi.c-3845-\t * prevent new ones from starting.  Must happen before we take\n"
}

							input: 40812
							output: 51
							thoughts: 174

**My Initial Thoughts on SPI Device Instantiation and the LAN865x Driver**

Okay, so I'm looking at this `new_device` entry in sysfs for SPI. Right, this is how you can dynamically instantiate a new SPI device from userspace. I see it's something like `echo lan8650 0 > /sys/class/spi_master/spiX/new_device`. Makes sense. But I'm immediately wondering about the environment – specifically, QEMU. Does QEMU even have native SPI controller support, or will I need to simulate it with something like `spi-loopback-test`, `spi-mock`, `spi-gpio`, or maybe even `spi-butterfly`? And, is Syzkaller hitting SPI, or is this a dead end?

Okay, hold on. Before I dive too deep into the setup, let's back up and understand the actual device driver's behavior. I need to see what happens *when* this `lan865x` device is probed. I should check the probe function, starting with the `lan865x_probe` function. I will go directly to `drivers/net/ethernet/microchip/lan865x/lan865x.c` and analyze from line 330 to about 420. That's where the interesting stuff likely is. That should tell me what's actually happening on instantiation.

{
  "File": "drivers/net/ethernet/microchip/lan865x/lan865x.c",
  "FirstLine": 330,
  "LineCount": 85
}

{
  "Contents": " 330:\t\t.ndo_eth_ioctl          = phy_do_ioctl_running,\n 331:\t};\n 332:\t\n 333:\tstatic int lan865x_probe(struct spi_device *spi)\n 334:\t{\n 335:\t\tstruct oa_tc6_quirks tc6_quirks = {};\n 336:\t\tstruct net_device *netdev;\n 337:\t\tstruct lan865x_priv *priv;\n 338:\t\tint ret;\n 339:\t\n 340:\t\tnetdev = alloc_etherdev(sizeof(struct lan865x_priv));\n 341:\t\tif (!netdev)\n 342:\t\t\treturn -ENOMEM;\n 343:\t\n 344:\t\tpriv = netdev_priv(netdev);\n 345:\t\tpriv-\u003enetdev = netdev;\n 346:\t\tpriv-\u003espi = spi;\n 347:\t\tspi_set_drvdata(spi, priv);\n 348:\t\tINIT_WORK(\u0026priv-\u003emulticast_work, lan865x_multicast_work_handler);\n 349:\t\n 350:\t\ttc6_quirks.quirk_flags = OA_TC6_PHY_INT;\n 351:\t\tpriv-\u003etc6 = oa_tc6_init(spi, netdev, \u0026tc6_quirks);\n 352:\t\tif (!priv-\u003etc6) {\n 353:\t\t\tret = -ENODEV;\n 354:\t\t\tgoto free_netdev;\n 355:\t\t}\n 356:\t\n 357:\t\t/* LAN865x Rev.B0/B1 configuration parameters from AN1760\n 358:\t\t * As per the Configuration Application Note AN1760 published in the\n 359:\t\t * link, https://www.microchip.com/en-us/application-notes/an1760\n 360:\t\t * Revision F (DS60001760G - June 2024), configure the MAC to set time\n 361:\t\t * stamping at the end of the Start of Frame Delimiter (SFD) and set the\n 362:\t\t * Timer Increment reg to 40 ns to be used as a 25 MHz internal clock.\n 363:\t\t */\n 364:\t\tret = oa_tc6_write_register(priv-\u003etc6, LAN865X_REG_MAC_TSU_TIMER_INCR,\n 365:\t\t\t\t\t    MAC_TSU_TIMER_INCR_COUNT_NANOSECONDS);\n 366:\t\tif (ret) {\n 367:\t\t\tdev_err(\u0026spi-\u003edev, \"Failed to config TSU Timer Incr reg: %d\\n\",\n 368:\t\t\t\tret);\n 369:\t\t\tgoto oa_tc6_exit;\n 370:\t\t}\n 371:\t\n 372:\t\t/* As per the point s3 in the below errata, SPI receive Ethernet frame\n 373:\t\t * transfer may halt when starting the next frame in the same data block\n 374:\t\t * (chunk) as the end of a previous frame. The RFA field should be\n 375:\t\t * configured to 01b or 10b for proper operation. In these modes, only\n 376:\t\t * one receive Ethernet frame will be placed in a single data block.\n 377:\t\t * When the RFA field is written to 01b, received frames will be forced\n 378:\t\t * to only start in the first word of the data block payload (SWO=0). As\n 379:\t\t * recommended, enable zero align receive frame feature for proper\n 380:\t\t * operation.\n 381:\t\t *\n 382:\t\t * https://ww1.microchip.com/downloads/aemDocuments/documents/AIS/ProductDocuments/Errata/LAN8650-1-Errata-80001075.pdf\n 383:\t\t */\n 384:\t\tret = oa_tc6_zero_align_receive_frame_enable(priv-\u003etc6);\n 385:\t\tif (ret) {\n 386:\t\t\tdev_err(\u0026spi-\u003edev, \"Failed to set ZARFE: %d\\n\", ret);\n 387:\t\t\tgoto oa_tc6_exit;\n 388:\t\t}\n 389:\t\n 390:\t\t/* Get the MAC address from the SPI device tree node */\n 391:\t\tif (device_get_ethdev_address(\u0026spi-\u003edev, netdev))\n 392:\t\t\teth_hw_addr_random(netdev);\n 393:\t\n 394:\t\tret = lan865x_set_hw_macaddr(priv, netdev-\u003edev_addr);\n 395:\t\tif (ret) {\n 396:\t\t\tdev_err(\u0026spi-\u003edev, \"Failed to configure MAC: %d\\n\", ret);\n 397:\t\t\tgoto oa_tc6_exit;\n 398:\t\t}\n 399:\t\n 400:\t\tnetdev-\u003eif_port = IF_PORT_10BASET;\n 401:\t\tnetdev-\u003eirq = spi-\u003eirq;\n 402:\t\tnetdev-\u003enetdev_ops = \u0026lan865x_netdev_ops;\n 403:\t\tnetdev-\u003eethtool_ops = \u0026lan865x_ethtool_ops;\n 404:\t\n 405:\t\tret = register_netdev(netdev);\n 406:\t\tif (ret) {\n 407:\t\t\tdev_err(\u0026spi-\u003edev, \"Register netdev failed (ret = %d)\", ret);\n 408:\t\t\tgoto oa_tc6_exit;\n 409:\t\t}\n 410:\t\n 411:\t\treturn 0;\n 412:\t\n 413:\toa_tc6_exit:\n 414:\t\toa_tc6_exit(priv-\u003etc6);\n"
}

							input: 42889
							output: 20
							thoughts: 859

**Fuzzing Feasibility Assessment**

Okay, let's break this down systematically. I'm looking at a patch that involves the `lan865x`, `oa_tc6`, and `microchip_t1s` components. My initial thought is to determine if this code is even *reachable* in a standard fuzzing environment. The triage philosophy prioritizes reachability as the primary gate.

First, I remember that `lan865x` is a MAC-PHY connected via SPI. The critical question here is whether this hardware or anything similar can be emulated within the standard QEMU setup we're using. Sadly, QEMU's documentation and my prior knowledge tell me it doesn't emulate the LAN8650, LAN8651, or any Microchip T1S PHY, nor does it have an OA-TC6 chip emulation.

Now, let's apply the triage philosophy. Section 1 stresses that fuzzing should only target code that *executes* in a standard virtual environment. Section 2 lays out the "negative criteria" for determining when to *not* fuzz. My primary concern is if the modified code falls into this category, specifically: "Structurally unreachable hardware" - like vendor-specific devices requiring physical ASIC cards unavailable in QEMU. Also, drivers that are only used during physical device removal, or are architecture-specific, are to be ignored.

Section 3 outlines the "positive criteria," code that *should* be fuzzed. That includes anything in core subsystems, refactorings, runtime assertions, or drivers accessible via virtual buses such as virtio, USB gadget, etc.

I've got four files in the modified code: `lan865x.c`, `oa_tc6.c`, `microchip_t1s.c`, and `oa_tc6.h`. My analysis says that:

1. `lan865x.c` is the Ethernet controller driver for the Microchip LAN865x family, using SPI.
2. `oa_tc6.c` is the Open Alliance TC6 10BASE-T1S MAC-PHY protocol library, also for SPI.
3. `microchip_t1s.c` is the Ethernet PHY driver for LAN867x/LAN865x.
4. `oa_tc6.h` is the associated header.

Given that these are SPI drivers for physical MAC-PHY chips, the key question is: are any of these components usable with virtual drivers or emulated hardware? The answer looks to be no. Therefore, I need to check all the kernel uses of `oa_tc6` and decide if the modified code is reachable.

{
  "Expression": "oa_tc6_init"
}

{
  "Output": "Documentation/networking/oa-tc6-framework.rst=454=The include/linux/oa_tc6.h defines the following functions:\nDocumentation/networking/oa-tc6-framework.rst-455-\nDocumentation/networking/oa-tc6-framework.rst:456:.. c:function:: struct oa_tc6 *oa_tc6_init(struct spi_device *spi, \\\nDocumentation/networking/oa-tc6-framework.rst-457-                                           struct net_device *netdev, \\\n--\ndrivers/net/ethernet/adi/adin1140.c=709=static int adin1140_probe(struct spi_device *spi)\n--\ndrivers/net/ethernet/adi/adin1140.c-726-\ndrivers/net/ethernet/adi/adin1140.c:727:\tpriv-\u003etc6 = oa_tc6_init(spi, netdev, \u0026tc6_quirks);\ndrivers/net/ethernet/adi/adin1140.c-728-\tif (!priv-\u003etc6)\n--\ndrivers/net/ethernet/microchip/lan865x/lan865x.c=333=static int lan865x_probe(struct spi_device *spi)\n--\ndrivers/net/ethernet/microchip/lan865x/lan865x.c-350-\ttc6_quirks.quirk_flags = OA_TC6_PHY_INT;\ndrivers/net/ethernet/microchip/lan865x/lan865x.c:351:\tpriv-\u003etc6 = oa_tc6_init(spi, netdev, \u0026tc6_quirks);\ndrivers/net/ethernet/microchip/lan865x/lan865x.c-352-\tif (!priv-\u003etc6) {\n--\ndrivers/net/ethernet/oa_tc6.c=1505=static int oa_tc6_check_ctrl_protection(struct oa_tc6 *tc6)\n--\ndrivers/net/ethernet/oa_tc6.c-1519-/**\ndrivers/net/ethernet/oa_tc6.c:1520: * oa_tc6_init - allocates and initializes oa_tc6 structure.\ndrivers/net/ethernet/oa_tc6.c-1521- * @spi: device with which data will be exchanged.\n--\ndrivers/net/ethernet/oa_tc6.c-1527- */\ndrivers/net/ethernet/oa_tc6.c:1528:struct oa_tc6 *oa_tc6_init(struct spi_device *spi, struct net_device *netdev,\ndrivers/net/ethernet/oa_tc6.c-1529-\t\t\t   struct oa_tc6_quirks *quirks)\n--\ndrivers/net/ethernet/oa_tc6.c-1644-}\ndrivers/net/ethernet/oa_tc6.c:1645:EXPORT_SYMBOL_GPL(oa_tc6_init);\ndrivers/net/ethernet/oa_tc6.c-1646-\n--\ninclude/linux/oa_tc6.h=76=struct oa_tc6_quirks {\n--\ninclude/linux/oa_tc6.h-79-\ninclude/linux/oa_tc6.h:80:struct oa_tc6 *oa_tc6_init(struct spi_device *spi, struct net_device *netdev,\ninclude/linux/oa_tc6.h-81-\t\t\t   struct oa_tc6_quirks *quirks);\n"
}

							input: 45259
							output: 176
							thoughts: 525

**My Assessment of the Unreachability of the Modified Code**

Okay, here's the deal: I've looked at the calls to `oa_tc6_init`. I see that it's only called by `adin1140_probe` and `lan865x_probe`. These are SPI Ethernet controller drivers, specifically for the Analog Devices ADIN1140 and the Microchip LAN8650/1 chips. Then there's `microchip_t1s`, a PHY driver for the Microchip LAN867x / LAN865x PHY hardware chips.

These are not generic devices. They're physical ICs – 10BASE-T1S single-pair Ethernet MAC-PHYs or PHYs that connect over SPI/MDIO. And, as far as I know, these aren't emulated by QEMU or Google Compute Engine VMs, which are standard environments for our fuzzing efforts. Without that actual hardware or a usable SPI device, neither `lan865x_probe`, `adin1140_probe`, `oa_tc6`, nor `microchip_t1s_driver` can be probed or run.

So, in essence, all of the modified code is structurally unreachable. It's essentially dead code in our current fuzzing setup.

Now, let's verify if all the pre-requisites are met:

1. **Is `WorthFuzzing` false?** Yes, absolutely. The changes are all specific to hardware (the `lan865x`, `oa_tc6`, and `microchip_t1s` drivers) that we can't emulate in our typical virtualized fuzzing environments.

2. **Are `FocusSymbols` and `EnableConfigs` appropriately set when `WorthFuzzing` is false?** They should be null or an empty list. So, let's double-check the parameter formatting for `set-results`: `EnableConfigs` should be a list of strings or null. `FocusSymbols` as well, should be a list of strings or null. I will provide a clear and concise `Reasoning` and set `WorthFuzzing` to boolean.

I think a clear, concise reasoning statement would be: "The changes modify the Microchip LAN865x Ethernet driver, the Open Alliance TC6 SPI MAC-PHY support library, and the Microchip 10BASE-T1S PHY driver. These drivers require specific physical 10BASE-T1S Ethernet / MAC-PHY hardware attached via SPI/MDIO which is not emulated in standard QEMU/GCE virtualized environments, making the code structurally unreachable during fuzzing."

Alright, time to call `set-results`.

{
  "EnableConfigs": [],
  "FocusSymbols": [],
  "Reasoning": "The patch modifies the Microchip LAN865x SPI Ethernet driver (drivers/net/ethernet/microchip/lan865x/lan865x.c), the Open Alliance TC6 MAC-PHY protocol layer (drivers/net/ethernet/oa_tc6.c), and the Microchip 10BASE-T1S PHY driver (drivers/net/phy/microchip_t1s.c). These drivers operate on specific physical 10BASE-T1S single-pair Ethernet hardware connected over SPI/MDIO that is not emulated in standard QEMU/GCE virtualized fuzzing environments, making the modified code structurally unreachable.",
  "WorthFuzzing": false
}

{
  "EnableConfigs": null,
  "FocusSymbols": [],
  "Reasoning": "The patch modifies the Microchip LAN865x SPI Ethernet driver (drivers/net/ethernet/microchip/lan865x/lan865x.c), the Open Alliance TC6 MAC-PHY protocol layer (drivers/net/ethernet/oa_tc6.c), and the Microchip 10BASE-T1S PHY driver (drivers/net/phy/microchip_t1s.c). These drivers operate on specific physical 10BASE-T1S single-pair Ethernet hardware connected over SPI/MDIO that is not emulated in standard QEMU/GCE virtualized fuzzing environments, making the modified code structurally unreachable.",
  "WorthFuzzing": false
}

{
  "WorthFuzzing": false
}

LLM Calls Summary:
Total Calls	Total Tokens	Avg Tokens	Total Duration (Seconds)	Avg Duration (Seconds)

Tool Calls Summary:
Total Calls	Total Duration (Seconds)	Avg Duration (Seconds)