AI Trajectory

null

{
  "EnableConfigs": null,
  "FocusSymbols": [],
  "Reasoning": "The patch modifies the `oa_tc6` (OPEN Alliance 10BASE-T1x MAC-PHY Serial Interface) framework, which is currently only used by the `lan865x` SPI network driver. Since `lan865x` is an SPI device, it requires specific hardware instantiation (e.g., via Device Tree or ACPI) and cannot be dynamically instantiated from userspace in standard virtualized environments (like QEMU/GCE) used by syzkaller. Therefore, the modified code is unreachable for the fuzzer.",
  "WorthFuzzing": false
}

null

{
  "PatchDiff": "commit 3bbdde1a648bafe026f9a367a9ad22cddeda6369\nAuthor: syz-cluster \u003ctriage@syzkaller.com\u003e\nDate:   Mon Jun 22 04:49:33 2026 +0000\n\n    syz-cluster: applied patch under review\n\ndiff --git a/drivers/net/ethernet/oa_tc6.c b/drivers/net/ethernet/oa_tc6.c\nindex 0727d53345a33b..180fc47c30b31d 100644\n--- a/drivers/net/ethernet/oa_tc6.c\n+++ b/drivers/net/ethernet/oa_tc6.c\n@@ -672,10 +672,16 @@ static void oa_tc6_cleanup_ongoing_tx_skb(struct oa_tc6 *tc6)\n \n static void oa_tc6_cleanup_waiting_tx_skb(struct oa_tc6 *tc6)\n {\n-\tif (tc6-\u003ewaiting_tx_skb) {\n+\tstruct sk_buff *skb;\n+\n+\tspin_lock_bh(\u0026tc6-\u003etx_skb_lock);\n+\tskb = tc6-\u003ewaiting_tx_skb;\n+\ttc6-\u003ewaiting_tx_skb = NULL;\n+\tspin_unlock_bh(\u0026tc6-\u003etx_skb_lock);\n+\n+\tif (skb) {\n \t\ttc6-\u003enetdev-\u003estats.tx_dropped++;\n-\t\tkfree_skb(tc6-\u003ewaiting_tx_skb);\n-\t\ttc6-\u003ewaiting_tx_skb = NULL;\n+\t\tkfree_skb(skb);\n \t}\n }\n \n@@ -686,6 +692,12 @@ static void oa_tc6_free_pending_skbs(struct oa_tc6 *tc6)\n \toa_tc6_cleanup_waiting_tx_skb(tc6);\n }\n \n+static void oa_tc6_look_for_new_frame(struct oa_tc6 *tc6)\n+{\n+\ttc6-\u003erx_buf_overflow = true;\n+\toa_tc6_cleanup_ongoing_rx_skb(tc6);\n+}\n+\n /* If the failure is at SPI interface level, masking and clearing\n  * the interrupt of the device won't work. Since SPI interrupt is\n  * disabled, it should stop the repeated interrupts.\n@@ -723,8 +735,7 @@ static int oa_tc6_process_extended_status(struct oa_tc6 *tc6)\n \t}\n \n \tif (FIELD_GET(STATUS0_RX_BUFFER_OVERFLOW_ERROR, value)) {\n-\t\ttc6-\u003erx_buf_overflow = true;\n-\t\toa_tc6_cleanup_ongoing_rx_skb(tc6);\n+\t\toa_tc6_look_for_new_frame(tc6);\n \t\tnet_err_ratelimited(\"%s: Receive buffer overflow error\\n\",\n \t\t\t\t    tc6-\u003enetdev-\u003ename);\n \t\treturn -EAGAIN;\n@@ -805,9 +816,15 @@ static void oa_tc6_submit_rx_skb(struct oa_tc6 *tc6)\n \ttc6-\u003erx_skb = NULL;\n }\n \n-static void oa_tc6_update_rx_skb(struct oa_tc6 *tc6, u8 *payload, u8 length)\n+static int oa_tc6_update_rx_skb(struct oa_tc6 *tc6, u8 *payload, u8 length)\n {\n+\tif ((tc6-\u003erx_skb-\u003etail + length) \u003e tc6-\u003erx_skb-\u003eend) {\n+\t\toa_tc6_look_for_new_frame(tc6);\n+\t\treturn -EAGAIN;\n+\t}\n+\n \tmemcpy(skb_put(tc6-\u003erx_skb, length), payload, length);\n+\treturn 0;\n }\n \n static int oa_tc6_allocate_rx_skb(struct oa_tc6 *tc6)\n@@ -831,7 +848,9 @@ static int oa_tc6_prcs_complete_rx_frame(struct oa_tc6 *tc6, u8 *payload,\n \tif (ret)\n \t\treturn ret;\n \n-\toa_tc6_update_rx_skb(tc6, payload, size);\n+\tret = oa_tc6_update_rx_skb(tc6, payload, size);\n+\tif (ret)\n+\t\treturn ret;\n \n \toa_tc6_submit_rx_skb(tc6);\n \n@@ -846,22 +865,24 @@ static int oa_tc6_prcs_rx_frame_start(struct oa_tc6 *tc6, u8 *payload, u16 size)\n \tif (ret)\n \t\treturn ret;\n \n-\toa_tc6_update_rx_skb(tc6, payload, size);\n-\n-\treturn 0;\n+\treturn oa_tc6_update_rx_skb(tc6, payload, size);\n }\n \n-static void oa_tc6_prcs_rx_frame_end(struct oa_tc6 *tc6, u8 *payload, u16 size)\n+static int oa_tc6_prcs_rx_frame_end(struct oa_tc6 *tc6, u8 *payload, u16 size)\n {\n-\toa_tc6_update_rx_skb(tc6, payload, size);\n+\tint ret;\n \n-\toa_tc6_submit_rx_skb(tc6);\n+\tret = oa_tc6_update_rx_skb(tc6, payload, size);\n+\tif (!ret)\n+\t\toa_tc6_submit_rx_skb(tc6);\n+\treturn ret;\n }\n \n-static void oa_tc6_prcs_ongoing_rx_frame(struct oa_tc6 *tc6, u8 *payload,\n-\t\t\t\t\t u32 footer)\n+static int oa_tc6_prcs_ongoing_rx_frame(struct oa_tc6 *tc6, u8 *payload,\n+\t\t\t\t\tu32 footer)\n {\n-\toa_tc6_update_rx_skb(tc6, payload, OA_TC6_CHUNK_PAYLOAD_SIZE);\n+\treturn oa_tc6_update_rx_skb(tc6, payload,\n+\t\t\t\t    OA_TC6_CHUNK_PAYLOAD_SIZE);\n }\n \n static int oa_tc6_prcs_rx_chunk_payload(struct oa_tc6 *tc6, u8 *data,\n@@ -874,6 +895,7 @@ static int oa_tc6_prcs_rx_chunk_payload(struct oa_tc6 *tc6, u8 *data,\n \tbool start_valid = FIELD_GET(OA_TC6_DATA_FOOTER_START_VALID, footer);\n \tbool end_valid = FIELD_GET(OA_TC6_DATA_FOOTER_END_VALID, footer);\n \tu16 size;\n+\tint ret;\n \n \t/* Restart the new rx frame after receiving rx buffer overflow error */\n \tif (start_valid \u0026\u0026 tc6-\u003erx_buf_overflow)\n@@ -901,8 +923,7 @@ static int oa_tc6_prcs_rx_chunk_payload(struct oa_tc6 *tc6, u8 *data,\n \t/* Process the chunk with only rx frame end */\n \tif (end_valid \u0026\u0026 !start_valid) {\n \t\tsize = end_byte_offset + 1;\n-\t\toa_tc6_prcs_rx_frame_end(tc6, data, size);\n-\t\treturn 0;\n+\t\treturn oa_tc6_prcs_rx_frame_end(tc6, data, size);\n \t}\n \n \t/* Process the chunk with previous rx frame end and next rx frame\n@@ -915,7 +936,9 @@ static int oa_tc6_prcs_rx_chunk_payload(struct oa_tc6 *tc6, u8 *data,\n \t\t */\n \t\tif (tc6-\u003erx_skb) {\n \t\t\tsize = end_byte_offset + 1;\n-\t\t\toa_tc6_prcs_rx_frame_end(tc6, data, size);\n+\t\t\tret = oa_tc6_prcs_rx_frame_end(tc6, data, size);\n+\t\t\tif (ret)\n+\t\t\t\treturn ret;\n \t\t}\n \t\tsize = OA_TC6_CHUNK_PAYLOAD_SIZE - start_byte_offset;\n \t\treturn oa_tc6_prcs_rx_frame_start(tc6,\n@@ -924,9 +947,7 @@ static int oa_tc6_prcs_rx_chunk_payload(struct oa_tc6 *tc6, u8 *data,\n \t}\n \n \t/* Process the chunk with ongoing rx frame data */\n-\toa_tc6_prcs_ongoing_rx_frame(tc6, data, footer);\n-\n-\treturn 0;\n+\treturn oa_tc6_prcs_ongoing_rx_frame(tc6, data, footer);\n }\n \n static u32 oa_tc6_get_rx_chunk_footer(struct oa_tc6 *tc6, u16 footer_offset)\n@@ -1250,11 +1271,6 @@ EXPORT_SYMBOL_GPL(oa_tc6_zero_align_receive_frame_enable);\n  */\n netdev_tx_t oa_tc6_start_xmit(struct oa_tc6 *tc6, struct sk_buff *skb)\n {\n-\tif (tc6-\u003edisable_traffic || tc6-\u003ewaiting_tx_skb) {\n-\t\tnetif_stop_queue(tc6-\u003enetdev);\n-\t\treturn NETDEV_TX_BUSY;\n-\t}\n-\n \tif (skb_linearize(skb)) {\n \t\tdev_kfree_skb_any(skb);\n \t\ttc6-\u003enetdev-\u003estats.tx_dropped++;\n@@ -1262,6 +1278,11 @@ netdev_tx_t oa_tc6_start_xmit(struct oa_tc6 *tc6, struct sk_buff *skb)\n \t}\n \n \tspin_lock_bh(\u0026tc6-\u003etx_skb_lock);\n+\tif (tc6-\u003edisable_traffic || tc6-\u003ewaiting_tx_skb) {\n+\t\tnetif_stop_queue(tc6-\u003enetdev);\n+\t\tspin_unlock_bh(\u0026tc6-\u003etx_skb_lock);\n+\t\treturn NETDEV_TX_BUSY;\n+\t}\n \ttc6-\u003ewaiting_tx_skb = skb;\n \tspin_unlock_bh(\u0026tc6-\u003etx_skb_lock);\n \n"
}

gemini-3.1-pro-preview

null

{
  "EnableConfigs": null,
  "FocusSymbols": [],
  "Reasoning": "The patch modifies the `oa_tc6` (OPEN Alliance 10BASE-T1x MAC-PHY Serial Interface) framework, which is currently only used by the `lan865x` SPI network driver. Since `lan865x` is an SPI device, it requires specific hardware instantiation (e.g., via Device Tree or ACPI) and cannot be dynamically instantiated from userspace in standard virtualized environments (like QEMU/GCE) used by syzkaller. Therefore, the modified code is unreachable for the fuzzer.",
  "WorthFuzzing": false
}

You are an expert Linux kernel maintainer.
Your job is to review a provided patch series and determine
if it makes functional changes to the kernel that should be fuzzed.

IMPORTANT: The changes have ALREADY been applied and committed as the HEAD commit in
your workspace. Do NOT rely on your internal knowledge of the kernel. You must actively
use your code access tools to examine the actual source code and confirm any assumptions.

Return WorthFuzzing=false if the patch only contains:
- Modifications to Documentation/, Kconfig files, or code comments.
- Purely decorative changes, such as logging (e.g., pr_err, printk) or tracepoints.
- Changes to numeric constants or macros that do not functionally alter execution flow.
- Code paths that are impossible to reach in virtualized environments like GCE or QEMU,
even when utilizing software-emulated hardware (e.g., usb gadget, mac80211_hwsim).

If it modifies reachable core kernel logic, drivers, or architectures, use your code search
tools to verify the code can be executed, then return WorthFuzzing=true.

When returning WorthFuzzing=true, you MUST ALSO:
1. Extract any specific kernel functions that should be heavily fuzzed into FocusSymbols.
   Avoid listing generic hot-path functions to prevent skewed test distributions.
2. Identify any specific CONFIG_ options required to properly test this new/modified feature.
   Go and look into the Kconfig files and check for ifdefs around the code, do not make assumptions.
   Do not list too generic configs (we already have them enabled). Only list those that
   specifically cover the modified code. List them in the EnableConfigs output array,
   and DO NOT add a '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.

For your convenience, here is the diff of the changes:
commit 3bbdde1a648bafe026f9a367a9ad22cddeda6369
Author: syz-cluster <triage@syzkaller.com>
Date:   Mon Jun 22 04:49:33 2026 +0000

    syz-cluster: applied patch under review

diff --git a/drivers/net/ethernet/oa_tc6.c b/drivers/net/ethernet/oa_tc6.c
index 0727d53345a33b..180fc47c30b31d 100644
--- a/drivers/net/ethernet/oa_tc6.c
+++ b/drivers/net/ethernet/oa_tc6.c
@@ -672,10 +672,16 @@ static void oa_tc6_cleanup_ongoing_tx_skb(struct oa_tc6 *tc6)
 
 static void oa_tc6_cleanup_waiting_tx_skb(struct oa_tc6 *tc6)
 {
-	if (tc6->waiting_tx_skb) {
+	struct sk_buff *skb;
+
+	spin_lock_bh(&tc6->tx_skb_lock);
+	skb = tc6->waiting_tx_skb;
+	tc6->waiting_tx_skb = NULL;
+	spin_unlock_bh(&tc6->tx_skb_lock);
+
+	if (skb) {
 		tc6->netdev->stats.tx_dropped++;
-		kfree_skb(tc6->waiting_tx_skb);
-		tc6->waiting_tx_skb = NULL;
+		kfree_skb(skb);
 	}
 }
 
@@ -686,6 +692,12 @@ static void oa_tc6_free_pending_skbs(struct oa_tc6 *tc6)
 	oa_tc6_cleanup_waiting_tx_skb(tc6);
 }
 
+static void oa_tc6_look_for_new_frame(struct oa_tc6 *tc6)
+{
+	tc6->rx_buf_overflow = true;
+	oa_tc6_cleanup_ongoing_rx_skb(tc6);
+}
+
 /* If the failure is at SPI interface level, masking and clearing
  * the interrupt of the device won't work. Since SPI interrupt is
  * disabled, it should stop the repeated interrupts.
@@ -723,8 +735,7 @@ static int oa_tc6_process_extended_status(struct oa_tc6 *tc6)
 	}
 
 	if (FIELD_GET(STATUS0_RX_BUFFER_OVERFLOW_ERROR, value)) {
-		tc6->rx_buf_overflow = true;
-		oa_tc6_cleanup_ongoing_rx_skb(tc6);
+		oa_tc6_look_for_new_frame(tc6);
 		net_err_ratelimited("%s: Receive buffer overflow error\n",
 				    tc6->netdev->name);
 		return -EAGAIN;
@@ -805,9 +816,15 @@ static void oa_tc6_submit_rx_skb(struct oa_tc6 *tc6)
 	tc6->rx_skb = NULL;
 }
 
-static void oa_tc6_update_rx_skb(struct oa_tc6 *tc6, u8 *payload, u8 length)
+static int oa_tc6_update_rx_skb(struct oa_tc6 *tc6, u8 *payload, u8 length)
 {
+	if ((tc6->rx_skb->tail + length) > tc6->rx_skb->end) {
+		oa_tc6_look_for_new_frame(tc6);
+		return -EAGAIN;
+	}
+
 	memcpy(skb_put(tc6->rx_skb, length), payload, length);
+	return 0;
 }
 
 static int oa_tc6_allocate_rx_skb(struct oa_tc6 *tc6)
@@ -831,7 +848,9 @@ static int oa_tc6_prcs_complete_rx_frame(struct oa_tc6 *tc6, u8 *payload,
 	if (ret)
 		return ret;
 
-	oa_tc6_update_rx_skb(tc6, payload, size);
+	ret = oa_tc6_update_rx_skb(tc6, payload, size);
+	if (ret)
+		return ret;
 
 	oa_tc6_submit_rx_skb(tc6);
 
@@ -846,22 +865,24 @@ static int oa_tc6_prcs_rx_frame_start(struct oa_tc6 *tc6, u8 *payload, u16 size)
 	if (ret)
 		return ret;
 
-	oa_tc6_update_rx_skb(tc6, payload, size);
-
-	return 0;
+	return oa_tc6_update_rx_skb(tc6, payload, size);
 }
 
-static void oa_tc6_prcs_rx_frame_end(struct oa_tc6 *tc6, u8 *payload, u16 size)
+static int oa_tc6_prcs_rx_frame_end(struct oa_tc6 *tc6, u8 *payload, u16 size)
 {
-	oa_tc6_update_rx_skb(tc6, payload, size);
+	int ret;
 
-	oa_tc6_submit_rx_skb(tc6);
+	ret = oa_tc6_update_rx_skb(tc6, payload, size);
+	if (!ret)
+		oa_tc6_submit_rx_skb(tc6);
+	return ret;
 }
 
-static void oa_tc6_prcs_ongoing_rx_frame(struct oa_tc6 *tc6, u8 *payload,
-					 u32 footer)
+static int oa_tc6_prcs_ongoing_rx_frame(struct oa_tc6 *tc6, u8 *payload,
+					u32 footer)
 {
-	oa_tc6_update_rx_skb(tc6, payload, OA_TC6_CHUNK_PAYLOAD_SIZE);
+	return oa_tc6_update_rx_skb(tc6, payload,
+				    OA_TC6_CHUNK_PAYLOAD_SIZE);
 }
 
 static int oa_tc6_prcs_rx_chunk_payload(struct oa_tc6 *tc6, u8 *data,
@@ -874,6 +895,7 @@ static int oa_tc6_prcs_rx_chunk_payload(struct oa_tc6 *tc6, u8 *data,
 	bool start_valid = FIELD_GET(OA_TC6_DATA_FOOTER_START_VALID, footer);
 	bool end_valid = FIELD_GET(OA_TC6_DATA_FOOTER_END_VALID, footer);
 	u16 size;
+	int ret;
 
 	/* Restart the new rx frame after receiving rx buffer overflow error */
 	if (start_valid && tc6->rx_buf_overflow)
@@ -901,8 +923,7 @@ static int oa_tc6_prcs_rx_chunk_payload(struct oa_tc6 *tc6, u8 *data,
 	/* Process the chunk with only rx frame end */
 	if (end_valid && !start_valid) {
 		size = end_byte_offset + 1;
-		oa_tc6_prcs_rx_frame_end(tc6, data, size);
-		return 0;
+		return oa_tc6_prcs_rx_frame_end(tc6, data, size);
 	}
 
 	/* Process the chunk with previous rx frame end and next rx frame
@@ -915,7 +936,9 @@ static int oa_tc6_prcs_rx_chunk_payload(struct oa_tc6 *tc6, u8 *data,
 		 */
 		if (tc6->rx_skb) {
 			size = end_byte_offset + 1;
-			oa_tc6_prcs_rx_frame_end(tc6, data, size);
+			ret = oa_tc6_prcs_rx_frame_end(tc6, data, size);
+			if (ret)
+				return ret;
 		}
 		size = OA_TC6_CHUNK_PAYLOAD_SIZE - start_byte_offset;
 		return oa_tc6_prcs_rx_frame_start(tc6,
@@ -924,9 +947,7 @@ static int oa_tc6_prcs_rx_chunk_payload(struct oa_tc6 *tc6, u8 *data,
 	}
 
 	/* Process the chunk with ongoing rx frame data */
-	oa_tc6_prcs_ongoing_rx_frame(tc6, data, footer);
-
-	return 0;
+	return oa_tc6_prcs_ongoing_rx_frame(tc6, data, footer);
 }
 
 static u32 oa_tc6_get_rx_chunk_footer(struct oa_tc6 *tc6, u16 footer_offset)
@@ -1250,11 +1271,6 @@ EXPORT_SYMBOL_GPL(oa_tc6_zero_align_receive_frame_enable);
  */
 netdev_tx_t oa_tc6_start_xmit(struct oa_tc6 *tc6, struct sk_buff *skb)
 {
-	if (tc6->disable_traffic || tc6->waiting_tx_skb) {
-		netif_stop_queue(tc6->netdev);
-		return NETDEV_TX_BUSY;
-	}
-
 	if (skb_linearize(skb)) {
 		dev_kfree_skb_any(skb);
 		tc6->netdev->stats.tx_dropped++;
@@ -1262,6 +1278,11 @@ netdev_tx_t oa_tc6_start_xmit(struct oa_tc6 *tc6, struct sk_buff *skb)
 	}
 
 	spin_lock_bh(&tc6->tx_skb_lock);
+	if (tc6->disable_traffic || tc6->waiting_tx_skb) {
+		netif_stop_queue(tc6->netdev);
+		spin_unlock_bh(&tc6->tx_skb_lock);
+		return NETDEV_TX_BUSY;
+	}
 	tc6->waiting_tx_skb = skb;
 	spin_unlock_bh(&tc6->tx_skb_lock);
 

gemini-3.1-pro-preview

null

null

							input: 4225
							output: 31
							thoughts: 556
						

**Analyzing a Patch for the OA_TC6 Ethernet Driver**

Okay, so I've got this patch for `drivers/net/ethernet/oa_tc6.c`. It looks like it's primarily a functional fix, which is always good. Let me break down the key changes and my thought process.

First, in `oa_tc6_cleanup_waiting_tx_skb`, they've added a `spin_lock_bh` around the access to `tc6->waiting_tx_skb`. Makes sense – clearly addressing a race condition there. `oa_tc6_start_xmit` also has this fix so both are protected under a lock.

Next, a new function, `oa_tc6_look_for_new_frame`, is introduced. This sets `tc6->rx_buf_overflow = true` and calls `oa_tc6_cleanup_ongoing_rx_skb`. This is interesting; it signals an RX buffer overflow, and then cleans up. This is probably related to the other major change.

The core of the fix seems to be in `oa_tc6_update_rx_skb`. It now explicitly checks if the intended write will exceed the allocated buffer (`tc6->rx_skb->tail + length > tc6->rx_skb->end`). If so, it calls `oa_tc6_look_for_new_frame` – presumably to handle the overflow – and returns `-EAGAIN`. Importantly, this `-EAGAIN` is propagated all the way up the call chain through several functions, which makes sense in context, since those functions are the consumers of this error, and are responsible for handling and recovering from the error.

Finally, in `oa_tc6_start_xmit`, the check for `tc6->disable_traffic || tc6->waiting_tx_skb` has been moved *inside* the `spin_lock_bh`. This cleans up the race.

So, the functional impact is this: this is to fix an out-of-bounds write in `oa_tc6_update_rx_skb`, possibly caused by using `skb_put` without proper checks, as well as fixing a race condition involving `tc6->waiting_tx_skb` in the transmit path. This race condition is now corrected by the appropriate locking mechanism.

Now, my immediate question is: is this even relevant in a virtualized environment? Is this `oa_tc6` driver something that gets used there? Let's check what `oa_tc6` actually *is*. Searching quickly, "oa_tc6" represents OPEN Alliance 10BASE-T1x MAC-PHY Serial Interface. It is a framework for MAC-PHYs. Now, let's search in the Kconfig for any clues of its usage.

{
  "Expression": "oa_tc6",
  "PathPrefix": "drivers/net/ethernet/"
}

{
  "Output": "\nFull output is too long, showing 500 out of 801 lines.\nUse more precise expression if possible.\n\ndrivers/net/ethernet/Makefile=106=obj-$(CONFIG_NET_VENDOR_PENSANDO) += pensando/\ndrivers/net/ethernet/Makefile:107:obj-$(CONFIG_OA_TC6) += oa_tc6.o\n--\ndrivers/net/ethernet/microchip/lan865x/lan865x.c-10-#include \u003clinux/phy.h\u003e\ndrivers/net/ethernet/microchip/lan865x/lan865x.c:11:#include \u003clinux/oa_tc6.h\u003e\ndrivers/net/ethernet/microchip/lan865x/lan865x.c-12-\n--\ndrivers/net/ethernet/microchip/lan865x/lan865x.c=39=struct lan865x_priv {\n--\ndrivers/net/ethernet/microchip/lan865x/lan865x.c-42-\tstruct spi_device *spi;\ndrivers/net/ethernet/microchip/lan865x/lan865x.c:43:\tstruct oa_tc6 *tc6;\ndrivers/net/ethernet/microchip/lan865x/lan865x.c-44-};\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-51-\ndrivers/net/ethernet/microchip/lan865x/lan865x.c:52:\treturn oa_tc6_write_register(tc6, LAN865X_REG_MAC_L_SADDR1, regval);\ndrivers/net/ethernet/microchip/lan865x/lan865x.c-53-}\n--\ndrivers/net/ethernet/microchip/lan865x/lan865x.c=55=static int lan865x_set_hw_macaddr(struct lan865x_priv *priv, const u8 *mac)\n--\ndrivers/net/ethernet/microchip/lan865x/lan865x.c-67-\tregval = (mac[5] \u003c\u003c 8) | mac[4];\ndrivers/net/ethernet/microchip/lan865x/lan865x.c:68:\tret = oa_tc6_write_register(priv-\u003etc6, LAN865X_REG_MAC_H_SADDR1,\ndrivers/net/ethernet/microchip/lan865x/lan865x.c-69-\t\t\t\t    regval);\n--\ndrivers/net/ethernet/microchip/lan865x/lan865x.c=132=static int lan865x_set_specific_multicast_addr(struct lan865x_priv *priv)\n--\ndrivers/net/ethernet/microchip/lan865x/lan865x.c-148-\t/* Enabling specific multicast addresses */\ndrivers/net/ethernet/microchip/lan865x/lan865x.c:149:\tret = oa_tc6_write_register(priv-\u003etc6, LAN865X_REG_MAC_H_HASH, hash_hi);\ndrivers/net/ethernet/microchip/lan865x/lan865x.c-150-\tif (ret) {\n--\ndrivers/net/ethernet/microchip/lan865x/lan865x.c-155-\ndrivers/net/ethernet/microchip/lan865x/lan865x.c:156:\tret = oa_tc6_write_register(priv-\u003etc6, LAN865X_REG_MAC_L_HASH, hash_lo);\ndrivers/net/ethernet/microchip/lan865x/lan865x.c-157-\tif (ret)\n--\ndrivers/net/ethernet/microchip/lan865x/lan865x.c=164=static int lan865x_set_all_multicast_addr(struct lan865x_priv *priv)\n--\ndrivers/net/ethernet/microchip/lan865x/lan865x.c-168-\t/* Enabling all multicast addresses */\ndrivers/net/ethernet/microchip/lan865x/lan865x.c:169:\tret = oa_tc6_write_register(priv-\u003etc6, LAN865X_REG_MAC_H_HASH,\ndrivers/net/ethernet/microchip/lan865x/lan865x.c-170-\t\t\t\t    0xffffffff);\n--\ndrivers/net/ethernet/microchip/lan865x/lan865x.c-176-\ndrivers/net/ethernet/microchip/lan865x/lan865x.c:177:\tret = oa_tc6_write_register(priv-\u003etc6, LAN865X_REG_MAC_L_HASH,\ndrivers/net/ethernet/microchip/lan865x/lan865x.c-178-\t\t\t\t    0xffffffff);\n--\ndrivers/net/ethernet/microchip/lan865x/lan865x.c=186=static int lan865x_clear_all_multicast_addr(struct lan865x_priv *priv)\n--\ndrivers/net/ethernet/microchip/lan865x/lan865x.c-189-\ndrivers/net/ethernet/microchip/lan865x/lan865x.c:190:\tret = oa_tc6_write_register(priv-\u003etc6, LAN865X_REG_MAC_H_HASH, 0);\ndrivers/net/ethernet/microchip/lan865x/lan865x.c-191-\tif (ret) {\n--\ndrivers/net/ethernet/microchip/lan865x/lan865x.c-196-\ndrivers/net/ethernet/microchip/lan865x/lan865x.c:197:\tret = oa_tc6_write_register(priv-\u003etc6, LAN865X_REG_MAC_L_HASH, 0);\ndrivers/net/ethernet/microchip/lan865x/lan865x.c-198-\tif (ret)\n--\ndrivers/net/ethernet/microchip/lan865x/lan865x.c=205=static void lan865x_multicast_work_handler(struct work_struct *work)\n--\ndrivers/net/ethernet/microchip/lan865x/lan865x.c-237-\t}\ndrivers/net/ethernet/microchip/lan865x/lan865x.c:238:\tret = oa_tc6_write_register(priv-\u003etc6, LAN865X_REG_MAC_NET_CFG, regval);\ndrivers/net/ethernet/microchip/lan865x/lan865x.c-239-\tif (ret)\n--\ndrivers/net/ethernet/microchip/lan865x/lan865x.c=251=static netdev_tx_t lan865x_send_packet(struct sk_buff *skb,\n--\ndrivers/net/ethernet/microchip/lan865x/lan865x.c-255-\ndrivers/net/ethernet/microchip/lan865x/lan865x.c:256:\treturn oa_tc6_start_xmit(priv-\u003etc6, skb);\ndrivers/net/ethernet/microchip/lan865x/lan865x.c-257-}\n--\ndrivers/net/ethernet/microchip/lan865x/lan865x.c=259=static int lan865x_hw_disable(struct lan865x_priv *priv)\n--\ndrivers/net/ethernet/microchip/lan865x/lan865x.c-262-\ndrivers/net/ethernet/microchip/lan865x/lan865x.c:263:\tif (oa_tc6_read_register(priv-\u003etc6, LAN865X_REG_MAC_NET_CTL, \u0026regval))\ndrivers/net/ethernet/microchip/lan865x/lan865x.c-264-\t\treturn -ENODEV;\n--\ndrivers/net/ethernet/microchip/lan865x/lan865x.c-267-\ndrivers/net/ethernet/microchip/lan865x/lan865x.c:268:\tif (oa_tc6_write_register(priv-\u003etc6, LAN865X_REG_MAC_NET_CTL, regval))\ndrivers/net/ethernet/microchip/lan865x/lan865x.c-269-\t\treturn -ENODEV;\n--\ndrivers/net/ethernet/microchip/lan865x/lan865x.c=290=static int lan865x_hw_enable(struct lan865x_priv *priv)\n--\ndrivers/net/ethernet/microchip/lan865x/lan865x.c-293-\ndrivers/net/ethernet/microchip/lan865x/lan865x.c:294:\tif (oa_tc6_read_register(priv-\u003etc6, LAN865X_REG_MAC_NET_CTL, \u0026regval))\ndrivers/net/ethernet/microchip/lan865x/lan865x.c-295-\t\treturn -ENODEV;\n--\ndrivers/net/ethernet/microchip/lan865x/lan865x.c-298-\ndrivers/net/ethernet/microchip/lan865x/lan865x.c:299:\tif (oa_tc6_write_register(priv-\u003etc6, LAN865X_REG_MAC_NET_CTL, regval))\ndrivers/net/ethernet/microchip/lan865x/lan865x.c-300-\t\treturn -ENODEV;\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-348-\ndrivers/net/ethernet/microchip/lan865x/lan865x.c:349:\tpriv-\u003etc6 = oa_tc6_init(spi, netdev);\ndrivers/net/ethernet/microchip/lan865x/lan865x.c-350-\tif (!priv-\u003etc6) {\n--\ndrivers/net/ethernet/microchip/lan865x/lan865x.c-361-\t */\ndrivers/net/ethernet/microchip/lan865x/lan865x.c:362:\tret = oa_tc6_write_register(priv-\u003etc6, LAN865X_REG_MAC_TSU_TIMER_INCR,\ndrivers/net/ethernet/microchip/lan865x/lan865x.c-363-\t\t\t\t    MAC_TSU_TIMER_INCR_COUNT_NANOSECONDS);\n--\ndrivers/net/ethernet/microchip/lan865x/lan865x.c-366-\t\t\tret);\ndrivers/net/ethernet/microchip/lan865x/lan865x.c:367:\t\tgoto oa_tc6_exit;\ndrivers/net/ethernet/microchip/lan865x/lan865x.c-368-\t}\n--\ndrivers/net/ethernet/microchip/lan865x/lan865x.c-381-\t */\ndrivers/net/ethernet/microchip/lan865x/lan865x.c:382:\tret = oa_tc6_zero_align_receive_frame_enable(priv-\u003etc6);\ndrivers/net/ethernet/microchip/lan865x/lan865x.c-383-\tif (ret) {\ndrivers/net/ethernet/microchip/lan865x/lan865x.c-384-\t\tdev_err(\u0026spi-\u003edev, \"Failed to set ZARFE: %d\\n\", ret);\ndrivers/net/ethernet/microchip/lan865x/lan865x.c:385:\t\tgoto oa_tc6_exit;\ndrivers/net/ethernet/microchip/lan865x/lan865x.c-386-\t}\n--\ndrivers/net/ethernet/microchip/lan865x/lan865x.c-394-\t\tdev_err(\u0026spi-\u003edev, \"Failed to configure MAC: %d\\n\", ret);\ndrivers/net/ethernet/microchip/lan865x/lan865x.c:395:\t\tgoto oa_tc6_exit;\ndrivers/net/ethernet/microchip/lan865x/lan865x.c-396-\t}\n--\ndrivers/net/ethernet/microchip/lan865x/lan865x.c-405-\t\tdev_err(\u0026spi-\u003edev, \"Register netdev failed (ret = %d)\", ret);\ndrivers/net/ethernet/microchip/lan865x/lan865x.c:406:\t\tgoto oa_tc6_exit;\ndrivers/net/ethernet/microchip/lan865x/lan865x.c-407-\t}\n--\ndrivers/net/ethernet/microchip/lan865x/lan865x.c-410-\ndrivers/net/ethernet/microchip/lan865x/lan865x.c:411:oa_tc6_exit:\ndrivers/net/ethernet/microchip/lan865x/lan865x.c:412:\toa_tc6_exit(priv-\u003etc6);\ndrivers/net/ethernet/microchip/lan865x/lan865x.c-413-free_netdev:\n--\ndrivers/net/ethernet/microchip/lan865x/lan865x.c=418=static void lan865x_remove(struct spi_device *spi)\n--\ndrivers/net/ethernet/microchip/lan865x/lan865x.c-423-\tunregister_netdev(priv-\u003enetdev);\ndrivers/net/ethernet/microchip/lan865x/lan865x.c:424:\toa_tc6_exit(priv-\u003etc6);\ndrivers/net/ethernet/microchip/lan865x/lan865x.c-425-\tfree_netdev(priv-\u003enetdev);\n--\ndrivers/net/ethernet/oa_tc6.c-12-#include \u003clinux/phy.h\u003e\ndrivers/net/ethernet/oa_tc6.c:13:#include \u003clinux/oa_tc6.h\u003e\ndrivers/net/ethernet/oa_tc6.c-14-\n--\ndrivers/net/ethernet/oa_tc6.c-111-/* Internal structure for MAC-PHY drivers */\ndrivers/net/ethernet/oa_tc6.c:112:struct oa_tc6 {\ndrivers/net/ethernet/oa_tc6.c-113-\tstruct net_device *netdev;\n--\ndrivers/net/ethernet/oa_tc6.c-134-\ndrivers/net/ethernet/oa_tc6.c:135:enum oa_tc6_header_type {\ndrivers/net/ethernet/oa_tc6.c-136-\tOA_TC6_CTRL_HEADER,\n--\ndrivers/net/ethernet/oa_tc6.c-139-\ndrivers/net/ethernet/oa_tc6.c:140:enum oa_tc6_register_op {\ndrivers/net/ethernet/oa_tc6.c-141-\tOA_TC6_CTRL_REG_READ = 0,\n--\ndrivers/net/ethernet/oa_tc6.c-144-\ndrivers/net/ethernet/oa_tc6.c:145:enum oa_tc6_data_valid_info {\ndrivers/net/ethernet/oa_tc6.c-146-\tOA_TC6_DATA_INVALID,\n--\ndrivers/net/ethernet/oa_tc6.c-149-\ndrivers/net/ethernet/oa_tc6.c:150:enum oa_tc6_data_start_valid_info {\ndrivers/net/ethernet/oa_tc6.c-151-\tOA_TC6_DATA_START_INVALID,\n--\ndrivers/net/ethernet/oa_tc6.c-154-\ndrivers/net/ethernet/oa_tc6.c:155:enum oa_tc6_data_end_valid_info {\ndrivers/net/ethernet/oa_tc6.c-156-\tOA_TC6_DATA_END_INVALID,\n--\ndrivers/net/ethernet/oa_tc6.c-159-\ndrivers/net/ethernet/oa_tc6.c:160:static int oa_tc6_spi_transfer(struct oa_tc6 *tc6,\ndrivers/net/ethernet/oa_tc6.c:161:\t\t\t       enum oa_tc6_header_type header_type, u16 length)\ndrivers/net/ethernet/oa_tc6.c-162-{\n--\ndrivers/net/ethernet/oa_tc6.c-180-\ndrivers/net/ethernet/oa_tc6.c:181:static int oa_tc6_get_parity(u32 p)\ndrivers/net/ethernet/oa_tc6.c-182-{\n--\ndrivers/net/ethernet/oa_tc6.c-193-\ndrivers/net/ethernet/oa_tc6.c:194:static __be32 oa_tc6_prepare_ctrl_header(u32 addr, u8 length,\ndrivers/net/ethernet/oa_tc6.c:195:\t\t\t\t\t enum oa_tc6_register_op reg_op)\ndrivers/net/ethernet/oa_tc6.c-196-{\n--\ndrivers/net/ethernet/oa_tc6.c-205-\theader |= FIELD_PREP(OA_TC6_CTRL_HEADER_PARITY,\ndrivers/net/ethernet/oa_tc6.c:206:\t\t\t     oa_tc6_get_parity(header));\ndrivers/net/ethernet/oa_tc6.c-207-\n--\ndrivers/net/ethernet/oa_tc6.c-210-\ndrivers/net/ethernet/oa_tc6.c:211:static void oa_tc6_update_ctrl_write_data(struct oa_tc6 *tc6, u32 value[],\ndrivers/net/ethernet/oa_tc6.c-212-\t\t\t\t\t  u8 length)\n--\ndrivers/net/ethernet/oa_tc6.c-219-\ndrivers/net/ethernet/oa_tc6.c:220:static u16 oa_tc6_calculate_ctrl_buf_size(u8 length)\ndrivers/net/ethernet/oa_tc6.c-221-{\n--\ndrivers/net/ethernet/oa_tc6.c-228-\ndrivers/net/ethernet/oa_tc6.c:229:static void oa_tc6_prepare_ctrl_spi_buf(struct oa_tc6 *tc6, u32 address,\ndrivers/net/ethernet/oa_tc6.c-230-\t\t\t\t\tu32 value[], u8 length,\ndrivers/net/ethernet/oa_tc6.c:231:\t\t\t\t\tenum oa_tc6_register_op reg_op)\ndrivers/net/ethernet/oa_tc6.c-232-{\n--\ndrivers/net/ethernet/oa_tc6.c-234-\ndrivers/net/ethernet/oa_tc6.c:235:\t*tx_buf = oa_tc6_prepare_ctrl_header(address, length, reg_op);\ndrivers/net/ethernet/oa_tc6.c-236-\ndrivers/net/ethernet/oa_tc6.c-237-\tif (reg_op == OA_TC6_CTRL_REG_WRITE)\ndrivers/net/ethernet/oa_tc6.c:238:\t\toa_tc6_update_ctrl_write_data(tc6, value, length);\ndrivers/net/ethernet/oa_tc6.c-239-}\ndrivers/net/ethernet/oa_tc6.c-240-\ndrivers/net/ethernet/oa_tc6.c:241:static int oa_tc6_check_ctrl_write_reply(struct oa_tc6 *tc6, u8 size)\ndrivers/net/ethernet/oa_tc6.c-242-{\n--\ndrivers/net/ethernet/oa_tc6.c-256-\ndrivers/net/ethernet/oa_tc6.c:257:static int oa_tc6_check_ctrl_read_reply(struct oa_tc6 *tc6, u8 size)\ndrivers/net/ethernet/oa_tc6.c-258-{\n--\ndrivers/net/ethernet/oa_tc6.c-270-\ndrivers/net/ethernet/oa_tc6.c:271:static void oa_tc6_copy_ctrl_read_data(struct oa_tc6 *tc6, u32 value[],\ndrivers/net/ethernet/oa_tc6.c-272-\t\t\t\t       u8 length)\n--\ndrivers/net/ethernet/oa_tc6.c-280-\ndrivers/net/ethernet/oa_tc6.c:281:static int oa_tc6_perform_ctrl(struct oa_tc6 *tc6, u32 address, u32 value[],\ndrivers/net/ethernet/oa_tc6.c:282:\t\t\t       u8 length, enum oa_tc6_register_op reg_op)\ndrivers/net/ethernet/oa_tc6.c-283-{\n--\ndrivers/net/ethernet/oa_tc6.c-287-\t/* Prepare control command and copy to SPI control buffer */\ndrivers/net/ethernet/oa_tc6.c:288:\toa_tc6_prepare_ctrl_spi_buf(tc6, address, value, length, reg_op);\ndrivers/net/ethernet/oa_tc6.c-289-\ndrivers/net/ethernet/oa_tc6.c:290:\tsize = oa_tc6_calculate_ctrl_buf_size(length);\ndrivers/net/ethernet/oa_tc6.c-291-\ndrivers/net/ethernet/oa_tc6.c-292-\t/* Perform SPI transfer */\ndrivers/net/ethernet/oa_tc6.c:293:\tret = oa_tc6_spi_transfer(tc6, OA_TC6_CTRL_HEADER, size);\ndrivers/net/ethernet/oa_tc6.c-294-\tif (ret) {\n--\ndrivers/net/ethernet/oa_tc6.c-301-\tif (reg_op == OA_TC6_CTRL_REG_WRITE)\ndrivers/net/ethernet/oa_tc6.c:302:\t\treturn oa_tc6_check_ctrl_write_reply(tc6, size);\ndrivers/net/ethernet/oa_tc6.c-303-\ndrivers/net/ethernet/oa_tc6.c-304-\t/* Check echoed/received control read command reply for errors */\ndrivers/net/ethernet/oa_tc6.c:305:\tret = oa_tc6_check_ctrl_read_reply(tc6, size);\ndrivers/net/ethernet/oa_tc6.c-306-\tif (ret)\n--\ndrivers/net/ethernet/oa_tc6.c-308-\ndrivers/net/ethernet/oa_tc6.c:309:\toa_tc6_copy_ctrl_read_data(tc6, value, length);\ndrivers/net/ethernet/oa_tc6.c-310-\n--\ndrivers/net/ethernet/oa_tc6.c-314-/**\ndrivers/net/ethernet/oa_tc6.c:315: * oa_tc6_read_registers - function for reading multiple consecutive registers.\ndrivers/net/ethernet/oa_tc6.c:316: * @tc6: oa_tc6 struct.\ndrivers/net/ethernet/oa_tc6.c-317- * @address: address of the first register to be read in the MAC-PHY.\n--\ndrivers/net/ethernet/oa_tc6.c-324- */\ndrivers/net/ethernet/oa_tc6.c:325:int oa_tc6_read_registers(struct oa_tc6 *tc6, u32 address, u32 value[],\ndrivers/net/ethernet/oa_tc6.c-326-\t\t\t  u8 length)\n--\ndrivers/net/ethernet/oa_tc6.c-335-\tmutex_lock(\u0026tc6-\u003espi_ctrl_lock);\ndrivers/net/ethernet/oa_tc6.c:336:\tret = oa_tc6_perform_ctrl(tc6, address, value, length,\ndrivers/net/ethernet/oa_tc6.c-337-\t\t\t\t  OA_TC6_CTRL_REG_READ);\n--\ndrivers/net/ethernet/oa_tc6.c-341-}\ndrivers/net/ethernet/oa_tc6.c:342:EXPORT_SYMBOL_GPL(oa_tc6_read_registers);\ndrivers/net/ethernet/oa_tc6.c-343-\ndrivers/net/ethernet/oa_tc6.c-344-/**\ndrivers/net/ethernet/oa_tc6.c:345: * oa_tc6_read_register - function for reading a MAC-PHY register.\ndrivers/net/ethernet/oa_tc6.c:346: * @tc6: oa_tc6 struct.\ndrivers/net/ethernet/oa_tc6.c-347- * @address: register address of the MAC-PHY to be read.\n--\ndrivers/net/ethernet/oa_tc6.c-351- */\ndrivers/net/ethernet/oa_tc6.c:352:int oa_tc6_read_register(struct oa_tc6 *tc6, u32 address, u32 *value)\ndrivers/net/ethernet/oa_tc6.c-353-{\ndrivers/net/ethernet/oa_tc6.c:354:\treturn oa_tc6_read_registers(tc6, address, value, 1);\ndrivers/net/ethernet/oa_tc6.c-355-}\ndrivers/net/ethernet/oa_tc6.c:356:EXPORT_SYMBOL_GPL(oa_tc6_read_register);\ndrivers/net/ethernet/oa_tc6.c-357-\ndrivers/net/ethernet/oa_tc6.c-358-/**\ndrivers/net/ethernet/oa_tc6.c:359: * oa_tc6_write_registers - function for writing multiple consecutive registers.\ndrivers/net/ethernet/oa_tc6.c:360: * @tc6: oa_tc6 struct.\ndrivers/net/ethernet/oa_tc6.c-361- * @address: address of the first register to be written in the MAC-PHY.\n--\ndrivers/net/ethernet/oa_tc6.c-368- */\ndrivers/net/ethernet/oa_tc6.c:369:int oa_tc6_write_registers(struct oa_tc6 *tc6, u32 address, u32 value[],\ndrivers/net/ethernet/oa_tc6.c-370-\t\t\t   u8 length)\n--\ndrivers/net/ethernet/oa_tc6.c-379-\tmutex_lock(\u0026tc6-\u003espi_ctrl_lock);\ndrivers/net/ethernet/oa_tc6.c:380:\tret = oa_tc6_perform_ctrl(tc6, address, value, length,\ndrivers/net/ethernet/oa_tc6.c-381-\t\t\t\t  OA_TC6_CTRL_REG_WRITE);\n--\ndrivers/net/ethernet/oa_tc6.c-385-}\ndrivers/net/ethernet/oa_tc6.c:386:EXPORT_SYMBOL_GPL(oa_tc6_write_registers);\ndrivers/net/ethernet/oa_tc6.c-387-\ndrivers/net/ethernet/oa_tc6.c-388-/**\ndrivers/net/ethernet/oa_tc6.c:389: * oa_tc6_write_register - function for writing a MAC-PHY register.\ndrivers/net/ethernet/oa_tc6.c:390: * @tc6: oa_tc6 struct.\ndrivers/net/ethernet/oa_tc6.c-391- * @address: register address of the MAC-PHY to be written.\n--\ndrivers/net/ethernet/oa_tc6.c-395- */\ndrivers/net/ethernet/oa_tc6.c:396:int oa_tc6_write_register(struct oa_tc6 *tc6, u32 address, u32 value)\ndrivers/net/ethernet/oa_tc6.c-397-{\ndrivers/net/ethernet/oa_tc6.c:398:\treturn oa_tc6_write_registers(tc6, address, \u0026value, 1);\ndrivers/net/ethernet/oa_tc6.c-399-}\ndrivers/net/ethernet/oa_tc6.c:400:EXPORT_SYMBOL_GPL(oa_tc6_write_register);\ndrivers/net/ethernet/oa_tc6.c-401-\ndrivers/net/ethernet/oa_tc6.c:402:static int oa_tc6_check_phy_reg_direct_access_capability(struct oa_tc6 *tc6)\ndrivers/net/ethernet/oa_tc6.c-403-{\n--\ndrivers/net/ethernet/oa_tc6.c-406-\ndrivers/net/ethernet/oa_tc6.c:407:\tret = oa_tc6_read_register(tc6, OA_TC6_REG_STDCAP, \u0026regval);\ndrivers/net/ethernet/oa_tc6.c-408-\tif (ret)\n--\ndrivers/net/ethernet/oa_tc6.c-416-\ndrivers/net/ethernet/oa_tc6.c:417:static void oa_tc6_handle_link_change(struct net_device *netdev)\ndrivers/net/ethernet/oa_tc6.c-418-{\n--\ndrivers/net/ethernet/oa_tc6.c-421-\ndrivers/net/ethernet/oa_tc6.c:422:static int oa_tc6_mdiobus_read(struct mii_bus *bus, int addr, int regnum)\ndrivers/net/ethernet/oa_tc6.c-423-{\ndrivers/net/ethernet/oa_tc6.c:424:\tstruct oa_tc6 *tc6 = bus-\u003epriv;\ndrivers/net/ethernet/oa_tc6.c-425-\tu32 regval;\n--\ndrivers/net/ethernet/oa_tc6.c-427-\ndrivers/net/ethernet/oa_tc6.c:428:\tret = oa_tc6_read_register(tc6, OA_TC6_PHY_STD_REG_ADDR_BASE |\ndrivers/net/ethernet/oa_tc6.c-429-\t\t\t\t   (regnum \u0026 OA_TC6_PHY_STD_REG_ADDR_MASK),\n--\ndrivers/net/ethernet/oa_tc6.c-436-\ndrivers/net/ethernet/oa_tc6.c:437:static int oa_tc6_mdiobus_write(struct mii_bus *bus, int addr, int regnum,\ndrivers/net/ethernet/oa_tc6.c-438-\t\t\t\tu16 val)\ndrivers/net/ethernet/oa_tc6.c-439-{\ndrivers/net/ethernet/oa_tc6.c:440:\tstruct oa_tc6 *tc6 = bus-\u003epriv;\ndrivers/net/ethernet/oa_tc6.c-441-\ndrivers/net/ethernet/oa_tc6.c:442:\treturn oa_tc6_write_register(tc6, OA_TC6_PHY_STD_REG_ADDR_BASE |\ndrivers/net/ethernet/oa_tc6.c-443-\t\t\t\t     (regnum \u0026 OA_TC6_PHY_STD_REG_ADDR_MASK),\n--\ndrivers/net/ethernet/oa_tc6.c-446-\ndrivers/net/ethernet/oa_tc6.c:447:static int oa_tc6_get_phy_c45_mms(int devnum)\ndrivers/net/ethernet/oa_tc6.c-448-{\n--\ndrivers/net/ethernet/oa_tc6.c-464-\ndrivers/net/ethernet/oa_tc6.c:465:static int oa_tc6_mdiobus_read_c45(struct mii_bus *bus, int addr, int devnum,\ndrivers/net/ethernet/oa_tc6.c-466-\t\t\t\t   int regnum)\ndrivers/net/ethernet/oa_tc6.c-467-{\ndrivers/net/ethernet/oa_tc6.c:468:\tstruct oa_tc6 *tc6 = bus-\u003epriv;\ndrivers/net/ethernet/oa_tc6.c-469-\tu32 regval;\n--\ndrivers/net/ethernet/oa_tc6.c-471-\ndrivers/net/ethernet/oa_tc6.c:472:\tret = oa_tc6_get_phy_c45_mms(devnum);\ndrivers/net/ethernet/oa_tc6.c-473-\tif (ret \u003c 0)\n--\ndrivers/net/ethernet/oa_tc6.c-475-\ndrivers/net/ethernet/oa_tc6.c:476:\tret = oa_tc6_read_register(tc6, (ret \u003c\u003c 16) | regnum, \u0026regval);\ndrivers/net/ethernet/oa_tc6.c-477-\tif (ret)\n--\ndrivers/net/ethernet/oa_tc6.c-482-\ndrivers/net/ethernet/oa_tc6.c:483:static int oa_tc6_mdiobus_write_c45(struct mii_bus *bus, int addr, int devnum,\ndrivers/net/ethernet/oa_tc6.c-484-\t\t\t\t    int regnum, u16 val)\ndrivers/net/ethernet/oa_tc6.c-485-{\ndrivers/net/ethernet/oa_tc6.c:486:\tstruct oa_tc6 *tc6 = bus-\u003epriv;\ndrivers/net/ethernet/oa_tc6.c-487-\tint ret;\ndrivers/net/ethernet/oa_tc6.c-488-\ndrivers/net/ethernet/oa_tc6.c:489:\tret = oa_tc6_get_phy_c45_mms(devnum);\ndrivers/net/ethernet/oa_tc6.c-490-\tif (ret \u003c 0)\n--\ndrivers/net/ethernet/oa_tc6.c-492-\ndrivers/net/ethernet/oa_tc6.c:493:\treturn oa_tc6_write_register(tc6, (ret \u003c\u003c 16) | regnum, val);\ndrivers/net/ethernet/oa_tc6.c-494-}\ndrivers/net/ethernet/oa_tc6.c-495-\ndrivers/net/ethernet/oa_tc6.c:496:static int oa_tc6_mdiobus_register(struct oa_tc6 *tc6)\ndrivers/net/ethernet/oa_tc6.c-497-{\n--\ndrivers/net/ethernet/oa_tc6.c-506-\ttc6-\u003emdiobus-\u003epriv = tc6;\ndrivers/net/ethernet/oa_tc6.c:507:\ttc6-\u003emdiobus-\u003eread = oa_tc6_mdiobus_read;\ndrivers/net/ethernet/oa_tc6.c:508:\ttc6-\u003emdiobus-\u003ewrite = oa_tc6_mdiobus_write;\ndrivers/net/ethernet/oa_tc6.c-509-\t/* OPEN Alliance 10BASE-T1x compliance MAC-PHYs will have both C22 and\n--\ndrivers/net/ethernet/oa_tc6.c-518-\t */\ndrivers/net/ethernet/oa_tc6.c:519:\ttc6-\u003emdiobus-\u003eread_c45 = oa_tc6_mdiobus_read_c45;\ndrivers/net/ethernet/oa_tc6.c:520:\ttc6-\u003emdiobus-\u003ewrite_c45 = oa_tc6_mdiobus_write_c45;\ndrivers/net/ethernet/oa_tc6.c-521-\ttc6-\u003emdiobus-\u003ename = \"oa-tc6-mdiobus\";\n--\ndrivers/net/ethernet/oa_tc6.c-536-\ndrivers/net/ethernet/oa_tc6.c:537:static void oa_tc6_mdiobus_unregister(struct oa_tc6 *tc6)\ndrivers/net/ethernet/oa_tc6.c-538-{\n--\ndrivers/net/ethernet/oa_tc6.c-542-\ndrivers/net/ethernet/oa_tc6.c:543:static int oa_tc6_phy_init(struct oa_tc6 *tc6)\ndrivers/net/ethernet/oa_tc6.c-544-{\n--\ndrivers/net/ethernet/oa_tc6.c-546-\ndrivers/net/ethernet/oa_tc6.c:547:\tret = oa_tc6_check_phy_reg_direct_access_capability(tc6);\ndrivers/net/ethernet/oa_tc6.c-548-\tif (ret) {\n--\ndrivers/net/ethernet/oa_tc6.c-553-\ndrivers/net/ethernet/oa_tc6.c:554:\tret = oa_tc6_mdiobus_register(tc6);\ndrivers/net/ethernet/oa_tc6.c-555-\tif (ret)\n--\ndrivers/net/ethernet/oa_tc6.c-560-\t\tnetdev_err(tc6-\u003enetdev, \"No PHY found\\n\");\ndrivers/net/ethernet/oa_tc6.c:561:\t\toa_tc6_mdiobus_unregister(tc6);\ndrivers/net/ethernet/oa_tc6.c-562-\t\treturn -ENODEV;\n--\ndrivers/net/ethernet/oa_tc6.c-566-\tret = phy_connect_direct(tc6-\u003enetdev, tc6-\u003ephydev,\ndrivers/net/ethernet/oa_tc6.c:567:\t\t\t\t \u0026oa_tc6_handle_link_change,\ndrivers/net/ethernet/oa_tc6.c-568-\t\t\t\t PHY_INTERFACE_MODE_INTERNAL);\n--\ndrivers/net/ethernet/oa_tc6.c-571-\t\t\t   tc6-\u003emdiobus-\u003eid);\ndrivers/net/ethernet/oa_tc6.c:572:\t\toa_tc6_mdiobus_unregister(tc6);\ndrivers/net/ethernet/oa_tc6.c-573-\t\treturn ret;\n--\ndrivers/net/ethernet/oa_tc6.c-580-\ndrivers/net/ethernet/oa_tc6.c:581:static void oa_tc6_phy_exit(struct oa_tc6 *tc6)\ndrivers/net/ethernet/oa_tc6.c-582-{\ndrivers/net/ethernet/oa_tc6.c-583-\tphy_disconnect(tc6-\u003ephydev);\ndrivers/net/ethernet/oa_tc6.c:584:\toa_tc6_mdiobus_unregister(tc6);\ndrivers/net/ethernet/oa_tc6.c-585-}\ndrivers/net/ethernet/oa_tc6.c-586-\ndrivers/net/ethernet/oa_tc6.c:587:static int oa_tc6_read_status0(struct oa_tc6 *tc6)\ndrivers/net/ethernet/oa_tc6.c-588-{\n--\ndrivers/net/ethernet/oa_tc6.c-591-\ndrivers/net/ethernet/oa_tc6.c:592:\tret = oa_tc6_read_register(tc6, OA_TC6_REG_STATUS0, \u0026regval);\ndrivers/net/ethernet/oa_tc6.c-593-\tif (ret) {\n--\ndrivers/net/ethernet/oa_tc6.c-601-\ndrivers/net/ethernet/oa_tc6.c:602:static int oa_tc6_sw_reset_macphy(struct oa_tc6 *tc6)\ndrivers/net/ethernet/oa_tc6.c-603-{\n--\ndrivers/net/ethernet/oa_tc6.c-606-\ndrivers/net/ethernet/oa_tc6.c:607:\tret = oa_tc6_write_register(tc6, OA_TC6_REG_RESET, regval);\ndrivers/net/ethernet/oa_tc6.c-608-\tif (ret)\n--\ndrivers/net/ethernet/oa_tc6.c-611-\t/* Poll for soft reset complete for every 1ms until 1s timeout */\ndrivers/net/ethernet/oa_tc6.c:612:\tret = readx_poll_timeout(oa_tc6_read_status0, tc6, regval,\ndrivers/net/ethernet/oa_tc6.c-613-\t\t\t\t regval \u0026 STATUS0_RESETC,\n--\ndrivers/net/ethernet/oa_tc6.c-619-\t/* Clear the reset complete status */\ndrivers/net/ethernet/oa_tc6.c:620:\treturn oa_tc6_write_register(tc6, OA_TC6_REG_STATUS0, regval);\ndrivers/net/ethernet/oa_tc6.c-621-}\ndrivers/net/ethernet/oa_tc6.c-622-\ndrivers/net/ethernet/oa_tc6.c:623:static int oa_tc6_unmask_macphy_error_interrupts(struct oa_tc6 *tc6)\ndrivers/net/ethernet/oa_tc6.c-624-{\n--\ndrivers/net/ethernet/oa_tc6.c-627-\ndrivers/net/ethernet/oa_tc6.c:628:\tret = oa_tc6_read_register(tc6, OA_TC6_REG_INT_MASK0, \u0026regval);\ndrivers/net/ethernet/oa_tc6.c-629-\tif (ret)\n--\ndrivers/net/ethernet/oa_tc6.c-636-\ndrivers/net/ethernet/oa_tc6.c:637:\treturn oa_tc6_write_register(tc6, OA_TC6_REG_INT_MASK0, regval);\ndrivers/net/ethernet/oa_tc6.c-638-}\ndrivers/net/ethernet/oa_tc6.c-639-\ndrivers/net/ethernet/oa_tc6.c:640:static int oa_tc6_enable_data_transfer(struct oa_tc6 *tc6)\ndrivers/net/ethernet/oa_tc6.c-641-{\n--\ndrivers/net/ethernet/oa_tc6.c-644-\ndrivers/net/ethernet/oa_tc6.c:645:\tret = oa_tc6_read_register(tc6, OA_TC6_REG_CONFIG0, \u0026value);\ndrivers/net/ethernet/oa_tc6.c-646-\tif (ret)\n--\ndrivers/net/ethernet/oa_tc6.c-651-\ndrivers/net/ethernet/oa_tc6.c:652:\treturn oa_tc6_write_register(tc6, OA_TC6_REG_CONFIG0, value);\ndrivers/net/ethernet/oa_tc6.c-653-}\ndrivers/net/ethernet/oa_tc6.c-654-\ndrivers/net/ethernet/oa_tc6.c:655:static void oa_tc6_cleanup_ongoing_rx_skb(struct oa_tc6 *tc6)\ndrivers/net/ethernet/oa_tc6.c-656-{\n--\ndrivers/net/ethernet/oa_tc6.c-663-\ndrivers/net/ethernet/oa_tc6.c:664:static void oa_tc6_cleanup_ongoing_tx_skb(struct oa_tc6 *tc6)\ndrivers/net/ethernet/oa_tc6.c-665-{\n--\ndrivers/net/ethernet/oa_tc6.c-672-\ndrivers/net/ethernet/oa_tc6.c:673:static void oa_tc6_cleanup_waiting_tx_skb(struct oa_tc6 *tc6)\ndrivers/net/ethernet/oa_tc6.c-674-{\n--\ndrivers/net/ethernet/oa_tc6.c-687-\ndrivers/net/ethernet/oa_tc6.c:688:static void oa_tc6_free_pending_skbs(struct oa_tc6 *tc6)\ndrivers/net/ethernet/oa_tc6.c-689-{\ndrivers/net/ethernet/oa_tc6.c:690:\toa_tc6_cleanup_ongoing_tx_skb(tc6);\ndrivers/net/ethernet/oa_tc6.c:691:\toa_tc6_cleanup_ongoing_rx_skb(tc6);\ndrivers/net/ethernet/oa_tc6.c:692:\toa_tc6_cleanup_waiting_tx_skb(tc6);\ndrivers/net/ethernet/oa_tc6.c-693-}\ndrivers/net/ethernet/oa_tc6.c-694-\ndrivers/net/ethernet/oa_tc6.c:695:static void oa_tc6_look_for_new_frame(struct oa_tc6 *tc6)\ndrivers/net/ethernet/oa_tc6.c-696-{\ndrivers/net/ethernet/oa_tc6.c-697-\ttc6-\u003erx_buf_overflow = true;\ndrivers/net/ethernet/oa_tc6.c:698:\toa_tc6_cleanup_ongoing_rx_skb(tc6);\ndrivers/net/ethernet/oa_tc6.c-699-}\n--\ndrivers/net/ethernet/oa_tc6.c-704- */\ndrivers/net/ethernet/oa_tc6.c:705:static void oa_tc6_disable_traffic(struct oa_tc6 *tc6)\ndrivers/net/ethernet/oa_tc6.c-706-{\n--\ndrivers/net/ethernet/oa_tc6.c-709-\ttc6-\u003edisable_traffic = true;\ndrivers/net/ethernet/oa_tc6.c:710:\toa_tc6_free_pending_skbs(tc6);\ndrivers/net/ethernet/oa_tc6.c:711:\toa_tc6_write_register(tc6, OA_TC6_REG_INT_MASK0, regval);\ndrivers/net/ethernet/oa_tc6.c:712:\toa_tc6_read_register(tc6, OA_TC6_REG_STATUS0, \u0026regval);\ndrivers/net/ethernet/oa_tc6.c:713:\toa_tc6_write_register(tc6, OA_TC6_REG_STATUS0, regval);\ndrivers/net/ethernet/oa_tc6.c-714-\tdev_err(\u0026tc6-\u003espi-\u003edev, \"Device interrupt disabled to avoid interrupt storm\");\n--\ndrivers/net/ethernet/oa_tc6.c-716-\ndrivers/net/ethernet/oa_tc6.c:717:static int oa_tc6_process_extended_status(struct oa_tc6 *tc6)\ndrivers/net/ethernet/oa_tc6.c-718-{\n--\ndrivers/net/ethernet/oa_tc6.c-721-\ndrivers/net/ethernet/oa_tc6.c:722:\tret = oa_tc6_read_register(tc6, OA_TC6_REG_STATUS0, \u0026value);\ndrivers/net/ethernet/oa_tc6.c-723-\tif (ret) {\n--\ndrivers/net/ethernet/oa_tc6.c-729-\t/* Clear the error interrupts status */\ndrivers/net/ethernet/oa_tc6.c:730:\tret = oa_tc6_write_register(tc6, OA_TC6_REG_STATUS0, value);\ndrivers/net/ethernet/oa_tc6.c-731-\tif (ret) {\n--\ndrivers/net/ethernet/oa_tc6.c-737-\tif (FIELD_GET(STATUS0_RX_BUFFER_OVERFLOW_ERROR, value)) {\ndrivers/net/ethernet/oa_tc6.c:738:\t\toa_tc6_look_for_new_frame(tc6);\ndrivers/net/ethernet/oa_tc6.c-739-\t\tnet_err_ratelimited(\"%s: Receive buffer overflow error\\n\",\n--\ndrivers/net/ethernet/oa_tc6.c-761-\ndrivers/net/ethernet/oa_tc6.c:762:static int oa_tc6_process_rx_chunk_footer(struct oa_tc6 *tc6, u32 footer)\ndrivers/net/ethernet/oa_tc6.c-763-{\n--\ndrivers/net/ethernet/oa_tc6.c-773-\tif (FIELD_GET(OA_TC6_DATA_FOOTER_EXTENDED_STS, footer)) {\n\n"
}

gemini-3.1-pro-preview

null

null

							input: 18472
							output: 32
							thoughts: 63
						

Okay, let's see what's on my mind regarding this code snippet.

**Analyzing Kernel Configuration Dependencies**

Alright, so the `oa_tc6` code is definitely tied to the `lan865x.c` driver within the ethernet network subsystem. My immediate question, of course, is what conditions need to be met for that code to even be compiled into the kernel? It's time to check the configuration flags. I need to determine if `CONFIG_OA_TC6` or `CONFIG_LAN865X` are set within the build configuration, as they will likely control the inclusion of the relevant code. Without knowing these dependencies I won't know if this code is in use, or even viable, in the current build.

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

{
  "Output": "drivers/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"
}

gemini-3.1-pro-preview

null

null

							input: 18836
							output: 33
							thoughts: 51
						

Here's my summary, as though I'm thinking through this process:

**Diving into the Configuration Options**

Okay, so I'm looking at this `config OA_TC6` setting, and it's flagged as a tristate dependent on `COMPILE_TEST`. Right, so it's probably related to supporting the OPEN Alliance TC6 10BASE-T1x MAC-PHY interface. That makes sense, given the context. Let me just confirm my understanding by taking a look at the `config LAN865X` options and their associated dependencies. I want to make sure I'm following the bigger picture. Understanding how this particular configuration interacts with other modules is crucial for the overall system architecture.

{
  "Expression": "config LAN865X",
  "PathPrefix": "drivers/net/ethernet/"
}

{
  "Output": "drivers/net/ethernet/microchip/lan865x/Kconfig=6=if NET_VENDOR_MICROCHIP\ndrivers/net/ethernet/microchip/lan865x/Kconfig-7-\ndrivers/net/ethernet/microchip/lan865x/Kconfig:8:config LAN865X\ndrivers/net/ethernet/microchip/lan865x/Kconfig-9-\ttristate \"LAN865x support\"\n"
}

gemini-3.1-pro-preview

null

null

							input: 19199
							output: 45
							thoughts: 15
						

Okay, let's dive into this. Here's my thought process on dissecting the dependencies of this `LAN865X` thing:

**Investigating the LAN865X Dependencies**

Alright, I'm thinking, "Let's get down to brass tacks. What exactly is this `LAN865X` dependent upon?" It's the first step in understanding the overall picture, in troubleshooting, and in designing a robust solution using it. I need to know the foundation, what it leans on, and where it gets its support. So I'll start by digging for those critical building blocks. Understanding dependencies is key to any architectural review, and even helps with debugging.

{
  "File": "drivers/net/ethernet/microchip/lan865x/Kconfig",
  "FirstLine": 1,
  "LineCount": 100
}

{
  "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"
}

gemini-3.1-pro-preview

null

null

							input: 19661
							output: 25
							thoughts: 307
						

**My SPI Deep Dive**

Okay, so I'm thinking about how to approach this from a testing perspective, specifically in a virtualized environment. The key question is always: *Can I reach SPI?* And yes, it seems like there are options. I could leverage `spi-mockup`, `spi-loopback-test`, or even `spidev`. Syzkaller, of course, *should* be in the mix, but I'm trying to remember if it has a direct SPI injection capability, something akin to USB gadget or mac80211_hwsim, but wait... I'm pretty sure there isn't a *standard* SPI software injection framework unless there's some very specific mock driver.

Wait, Syzkaller doesn't have *generic* SPI packet injection, but I do remember it fuzzing SPI drivers if they expose a character device or there's a mockup. So it *can* fuzz SPI, if the device is instantiated.

Which brings me to the core problem. How is `lan865x` instantiated? It *is* an SPI device. The usual suspects for instantiation are device tree or ACPI. Does Syzkaller have a way to inject device tree nodes, or use `spi_new_device`? I don't think so... it seems it lacks a *generic* way to instantiate arbitrary SPI devices, unless there's a dedicated pseudo-device or a `syz_dev_init` trick to be done.

Hold on a second, wasn't there something about Syzkaller adding *some* SPI fuzzing support recently? Maybe it just fuzzes the netdev if it is instantiated, that's what's ringing the bell. But if it's not instantiated, the code is effectively unreachable!

So, the next step is clear. I need to figure out *how* to instantiate `lan865x`. That's the key to everything here.

{
  "Expression": "lan865x",
  "PathPrefix": ""
}

{
  "Output": "MAINTAINERS=17469=F:\tDocumentation/devicetree/bindings/net/microchip,lan8650.yaml\nMAINTAINERS:17470:F:\tdrivers/net/ethernet/microchip/lan865x/lan865x.c\nMAINTAINERS-17471-\n--\ndrivers/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-{\ndrivers/net/ethernet/microchip/lan865x/lan865x.c-335-\tstruct net_device *netdev;\ndrivers/net/ethernet/microchip/lan865x/lan865x.c:336:\tstruct lan865x_priv *priv;\ndrivers/net/ethernet/microchip/lan865x/lan865x.c-337-\tint ret;\ndrivers/net/ethernet/microchip/lan865x/lan865x.c-338-\ndrivers/net/ethernet/microchip/lan865x/lan865x.c:339:\tnetdev = alloc_etherdev(sizeof(struct lan865x_priv));\ndrivers/net/ethernet/microchip/lan865x/lan865x.c-340-\tif (!netdev)\n--\ndrivers/net/ethernet/microchip/lan865x/lan865x.c-346-\tspi_set_drvdata(spi, priv);\ndrivers/net/ethernet/microchip/lan865x/lan865x.c:347:\tINIT_WORK(\u0026priv-\u003emulticast_work, lan865x_multicast_work_handler);\ndrivers/net/ethernet/microchip/lan865x/lan865x.c-348-\n--\ndrivers/net/ethernet/microchip/lan865x/lan865x.c-391-\ndrivers/net/ethernet/microchip/lan865x/lan865x.c:392:\tret = lan865x_set_hw_macaddr(priv, netdev-\u003edev_addr);\ndrivers/net/ethernet/microchip/lan865x/lan865x.c-393-\tif (ret) {\n--\ndrivers/net/ethernet/microchip/lan865x/lan865x.c-399-\tnetdev-\u003eirq = spi-\u003eirq;\ndrivers/net/ethernet/microchip/lan865x/lan865x.c:400:\tnetdev-\u003enetdev_ops = \u0026lan865x_netdev_ops;\ndrivers/net/ethernet/microchip/lan865x/lan865x.c:401:\tnetdev-\u003eethtool_ops = \u0026lan865x_ethtool_ops;\ndrivers/net/ethernet/microchip/lan865x/lan865x.c-402-\n--\ndrivers/net/ethernet/microchip/lan865x/lan865x.c-417-\ndrivers/net/ethernet/microchip/lan865x/lan865x.c:418:static void lan865x_remove(struct spi_device *spi)\ndrivers/net/ethernet/microchip/lan865x/lan865x.c-419-{\ndrivers/net/ethernet/microchip/lan865x/lan865x.c:420:\tstruct lan865x_priv *priv = spi_get_drvdata(spi);\ndrivers/net/ethernet/microchip/lan865x/lan865x.c-421-\n--\ndrivers/net/ethernet/microchip/lan865x/lan865x.c-427-\ndrivers/net/ethernet/microchip/lan865x/lan865x.c:428:static const struct spi_device_id lan865x_ids[] = {\ndrivers/net/ethernet/microchip/lan865x/lan865x.c-429-\t{ .name = \"lan8650\" },\n--\ndrivers/net/ethernet/microchip/lan865x/lan865x.c-432-};\ndrivers/net/ethernet/microchip/lan865x/lan865x.c:433:MODULE_DEVICE_TABLE(spi, lan865x_ids);\ndrivers/net/ethernet/microchip/lan865x/lan865x.c-434-\ndrivers/net/ethernet/microchip/lan865x/lan865x.c:435:static const struct of_device_id lan865x_dt_ids[] = {\ndrivers/net/ethernet/microchip/lan865x/lan865x.c-436-\t{ .compatible = \"microchip,lan8650\" },\n--\ndrivers/net/ethernet/microchip/lan865x/lan865x.c-439-};\ndrivers/net/ethernet/microchip/lan865x/lan865x.c:440:MODULE_DEVICE_TABLE(of, lan865x_dt_ids);\ndrivers/net/ethernet/microchip/lan865x/lan865x.c-441-\ndrivers/net/ethernet/microchip/lan865x/lan865x.c:442:static struct spi_driver lan865x_driver = {\ndrivers/net/ethernet/microchip/lan865x/lan865x.c-443-\t.driver = {\ndrivers/net/ethernet/microchip/lan865x/lan865x.c-444-\t\t.name = DRV_NAME,\ndrivers/net/ethernet/microchip/lan865x/lan865x.c:445:\t\t.of_match_table = lan865x_dt_ids,\ndrivers/net/ethernet/microchip/lan865x/lan865x.c-446-\t },\ndrivers/net/ethernet/microchip/lan865x/lan865x.c:447:\t.probe = lan865x_probe,\ndrivers/net/ethernet/microchip/lan865x/lan865x.c:448:\t.remove = lan865x_remove,\ndrivers/net/ethernet/microchip/lan865x/lan865x.c:449:\t.id_table = lan865x_ids,\ndrivers/net/ethernet/microchip/lan865x/lan865x.c-450-};\ndrivers/net/ethernet/microchip/lan865x/lan865x.c:451:module_spi_driver(lan865x_driver);\ndrivers/net/ethernet/microchip/lan865x/lan865x.c-452-\n--\ndrivers/net/phy/microchip_t1s.c=77=static const u16 lan867x_revb1_fixup_masks[12] = {\n--\ndrivers/net/phy/microchip_t1s.c-87- */\ndrivers/net/phy/microchip_t1s.c:88:static const u32 lan865x_revb_fixup_registers[17] = {\ndrivers/net/phy/microchip_t1s.c-89-\t0x00D0, 0x00E0, 0x00E9, 0x00F5,\n--\ndrivers/net/phy/microchip_t1s.c-95-\ndrivers/net/phy/microchip_t1s.c:96:static const u16 lan865x_revb_fixup_values[17] = {\ndrivers/net/phy/microchip_t1s.c-97-\t0x3F31, 0xC000, 0x9E50, 0x1CF8,\n--\ndrivers/net/phy/microchip_t1s.c-103-\ndrivers/net/phy/microchip_t1s.c:104:static const u16 lan865x_revb_fixup_cfg_regs[2] = {\ndrivers/net/phy/microchip_t1s.c-105-\t0x0084, 0x008A,\n--\ndrivers/net/phy/microchip_t1s.c-107-\ndrivers/net/phy/microchip_t1s.c:108:static const u32 lan865x_revb_sqi_fixup_regs[12] = {\ndrivers/net/phy/microchip_t1s.c-109-\t0x00B0, 0x00B1, 0x00B2, 0x00B3,\n--\ndrivers/net/phy/microchip_t1s.c-113-\ndrivers/net/phy/microchip_t1s.c:114:static const u16 lan865x_revb_sqi_fixup_values[12] = {\ndrivers/net/phy/microchip_t1s.c-115-\t0x0103, 0x0910, 0x1D26, 0x002A,\n--\ndrivers/net/phy/microchip_t1s.c-119-\ndrivers/net/phy/microchip_t1s.c:120:static const u16 lan865x_revb_sqi_fixup_cfg_regs[3] = {\ndrivers/net/phy/microchip_t1s.c-121-\t0x00AD, 0x00AE, 0x00AF,\n--\ndrivers/net/phy/microchip_t1s.c=134=static const u16 lan867x_revd0_fixup_values[8] = {\n--\ndrivers/net/phy/microchip_t1s.c-146- */\ndrivers/net/phy/microchip_t1s.c:147:static int lan865x_revb_indirect_read(struct phy_device *phydev, u16 addr)\ndrivers/net/phy/microchip_t1s.c-148-{\n--\ndrivers/net/phy/microchip_t1s.c-166- */\ndrivers/net/phy/microchip_t1s.c:167:static int lan865x_generate_cfg_offsets(struct phy_device *phydev, s8 offsets[])\ndrivers/net/phy/microchip_t1s.c-168-{\n--\ndrivers/net/phy/microchip_t1s.c-172-\tfor (int i = 0; i \u003c ARRAY_SIZE(fixup_regs); i++) {\ndrivers/net/phy/microchip_t1s.c:173:\t\tret = lan865x_revb_indirect_read(phydev, fixup_regs[i]);\ndrivers/net/phy/microchip_t1s.c-174-\t\tif (ret \u003c 0)\n--\ndrivers/net/phy/microchip_t1s.c-187-\ndrivers/net/phy/microchip_t1s.c:188:static int lan865x_read_cfg_params(struct phy_device *phydev,\ndrivers/net/phy/microchip_t1s.c-189-\t\t\t\t   const u16 cfg_regs[], u16 cfg_params[],\n--\ndrivers/net/phy/microchip_t1s.c-204-\ndrivers/net/phy/microchip_t1s.c:205:static int lan865x_write_cfg_params(struct phy_device *phydev,\ndrivers/net/phy/microchip_t1s.c-206-\t\t\t\t    const u16 cfg_regs[], u16 cfg_params[],\n--\ndrivers/net/phy/microchip_t1s.c-220-\ndrivers/net/phy/microchip_t1s.c:221:static int lan865x_setup_cfgparam(struct phy_device *phydev, s8 offsets[])\ndrivers/net/phy/microchip_t1s.c-222-{\ndrivers/net/phy/microchip_t1s.c:223:\tu16 cfg_results[ARRAY_SIZE(lan865x_revb_fixup_cfg_regs)];\ndrivers/net/phy/microchip_t1s.c:224:\tu16 cfg_params[ARRAY_SIZE(lan865x_revb_fixup_cfg_regs)];\ndrivers/net/phy/microchip_t1s.c-225-\tint ret;\ndrivers/net/phy/microchip_t1s.c-226-\ndrivers/net/phy/microchip_t1s.c:227:\tret = lan865x_read_cfg_params(phydev, lan865x_revb_fixup_cfg_regs,\ndrivers/net/phy/microchip_t1s.c-228-\t\t\t\t      cfg_params, ARRAY_SIZE(cfg_params));\n--\ndrivers/net/phy/microchip_t1s.c-236-\ndrivers/net/phy/microchip_t1s.c:237:\treturn lan865x_write_cfg_params(phydev, lan865x_revb_fixup_cfg_regs,\ndrivers/net/phy/microchip_t1s.c-238-\t\t\t\t\tcfg_results, ARRAY_SIZE(cfg_results));\n--\ndrivers/net/phy/microchip_t1s.c-240-\ndrivers/net/phy/microchip_t1s.c:241:static int lan865x_setup_sqi_cfgparam(struct phy_device *phydev, s8 offsets[])\ndrivers/net/phy/microchip_t1s.c-242-{\ndrivers/net/phy/microchip_t1s.c:243:\tu16 cfg_results[ARRAY_SIZE(lan865x_revb_sqi_fixup_cfg_regs)];\ndrivers/net/phy/microchip_t1s.c:244:\tu16 cfg_params[ARRAY_SIZE(lan865x_revb_sqi_fixup_cfg_regs)];\ndrivers/net/phy/microchip_t1s.c-245-\tint ret;\ndrivers/net/phy/microchip_t1s.c-246-\ndrivers/net/phy/microchip_t1s.c:247:\tret = lan865x_read_cfg_params(phydev, lan865x_revb_sqi_fixup_cfg_regs,\ndrivers/net/phy/microchip_t1s.c-248-\t\t\t\t      cfg_params, ARRAY_SIZE(cfg_params));\n--\ndrivers/net/phy/microchip_t1s.c-258-\ndrivers/net/phy/microchip_t1s.c:259:\treturn lan865x_write_cfg_params(phydev, lan865x_revb_sqi_fixup_cfg_regs,\ndrivers/net/phy/microchip_t1s.c-260-\t\t\t\t\tcfg_results, ARRAY_SIZE(cfg_results));\n--\ndrivers/net/phy/microchip_t1s.c-262-\ndrivers/net/phy/microchip_t1s.c:263:static int lan865x_revb_config_init(struct phy_device *phydev)\ndrivers/net/phy/microchip_t1s.c-264-{\n--\ndrivers/net/phy/microchip_t1s.c-270-\t */\ndrivers/net/phy/microchip_t1s.c:271:\tret = lan865x_generate_cfg_offsets(phydev, offsets);\ndrivers/net/phy/microchip_t1s.c-272-\tif (ret)\n--\ndrivers/net/phy/microchip_t1s.c-274-\ndrivers/net/phy/microchip_t1s.c:275:\tfor (int i = 0; i \u003c ARRAY_SIZE(lan865x_revb_fixup_registers); i++) {\ndrivers/net/phy/microchip_t1s.c-276-\t\tret = phy_write_mmd(phydev, MDIO_MMD_VEND2,\ndrivers/net/phy/microchip_t1s.c:277:\t\t\t\t    lan865x_revb_fixup_registers[i],\ndrivers/net/phy/microchip_t1s.c:278:\t\t\t\t    lan865x_revb_fixup_values[i]);\ndrivers/net/phy/microchip_t1s.c-279-\t\tif (ret)\n--\ndrivers/net/phy/microchip_t1s.c-282-\t\tif (i == 1) {\ndrivers/net/phy/microchip_t1s.c:283:\t\t\tret = lan865x_setup_cfgparam(phydev, offsets);\ndrivers/net/phy/microchip_t1s.c-284-\t\t\tif (ret)\n--\ndrivers/net/phy/microchip_t1s.c-288-\ndrivers/net/phy/microchip_t1s.c:289:\tret = lan865x_setup_sqi_cfgparam(phydev, offsets);\ndrivers/net/phy/microchip_t1s.c-290-\tif (ret)\n--\ndrivers/net/phy/microchip_t1s.c-292-\ndrivers/net/phy/microchip_t1s.c:293:\tfor (int i = 0; i \u003c ARRAY_SIZE(lan865x_revb_sqi_fixup_regs); i++) {\ndrivers/net/phy/microchip_t1s.c-294-\t\tret = phy_write_mmd(phydev, MDIO_MMD_VEND2,\ndrivers/net/phy/microchip_t1s.c:295:\t\t\t\t    lan865x_revb_sqi_fixup_regs[i],\ndrivers/net/phy/microchip_t1s.c:296:\t\t\t\t    lan865x_revb_sqi_fixup_values[i]);\ndrivers/net/phy/microchip_t1s.c-297-\t\tif (ret)\n--\ndrivers/net/phy/microchip_t1s.c=329=static int lan867x_revc_config_init(struct phy_device *phydev)\n--\ndrivers/net/phy/microchip_t1s.c-337-\ndrivers/net/phy/microchip_t1s.c:338:\tret = lan865x_generate_cfg_offsets(phydev, offsets);\ndrivers/net/phy/microchip_t1s.c-339-\tif (ret)\n--\ndrivers/net/phy/microchip_t1s.c-353-\t\tret = phy_write_mmd(phydev, MDIO_MMD_VEND2,\ndrivers/net/phy/microchip_t1s.c:354:\t\t\t\t    lan865x_revb_fixup_registers[i],\ndrivers/net/phy/microchip_t1s.c:355:\t\t\t\t    lan865x_revb_fixup_values[i]);\ndrivers/net/phy/microchip_t1s.c-356-\t\tif (ret)\n--\ndrivers/net/phy/microchip_t1s.c-359-\t\tif (i == 1) {\ndrivers/net/phy/microchip_t1s.c:360:\t\t\tret = lan865x_setup_cfgparam(phydev, offsets);\ndrivers/net/phy/microchip_t1s.c-361-\t\t\tif (ret)\n--\ndrivers/net/phy/microchip_t1s.c-365-\ndrivers/net/phy/microchip_t1s.c:366:\tret = lan865x_setup_sqi_cfgparam(phydev, offsets);\ndrivers/net/phy/microchip_t1s.c-367-\tif (ret)\n--\ndrivers/net/phy/microchip_t1s.c-369-\ndrivers/net/phy/microchip_t1s.c:370:\tfor (int i = 0; i \u003c ARRAY_SIZE(lan865x_revb_sqi_fixup_regs); i++) {\ndrivers/net/phy/microchip_t1s.c-371-\t\tret = phy_write_mmd(phydev, MDIO_MMD_VEND2,\ndrivers/net/phy/microchip_t1s.c:372:\t\t\t\t    lan865x_revb_sqi_fixup_regs[i],\ndrivers/net/phy/microchip_t1s.c:373:\t\t\t\t    lan865x_revb_sqi_fixup_values[i]);\ndrivers/net/phy/microchip_t1s.c-374-\t\tif (ret)\n--\ndrivers/net/phy/microchip_t1s.c=494=static int lan86xx_read_status(struct phy_device *phydev)\n--\ndrivers/net/phy/microchip_t1s.c-518- */\ndrivers/net/phy/microchip_t1s.c:519:static int lan865x_phy_read_mmd(struct phy_device *phydev, int devnum,\ndrivers/net/phy/microchip_t1s.c-520-\t\t\t\tu16 regnum)\n--\ndrivers/net/phy/microchip_t1s.c-527-\ndrivers/net/phy/microchip_t1s.c:528:static int lan865x_phy_write_mmd(struct phy_device *phydev, int devnum,\ndrivers/net/phy/microchip_t1s.c-529-\t\t\t\t u16 regnum, u16 val)\n--\ndrivers/net/phy/microchip_t1s.c=537=static struct phy_driver microchip_t1s_driver[] = {\n--\ndrivers/net/phy/microchip_t1s.c-584-\t\t.features           = PHY_BASIC_T1S_P2MP_FEATURES,\ndrivers/net/phy/microchip_t1s.c:585:\t\t.config_init        = lan865x_revb_config_init,\ndrivers/net/phy/microchip_t1s.c-586-\t\t.read_status        = lan86xx_read_status,\ndrivers/net/phy/microchip_t1s.c:587:\t\t.read_mmd           = lan865x_phy_read_mmd,\ndrivers/net/phy/microchip_t1s.c:588:\t\t.write_mmd          = lan865x_phy_write_mmd,\ndrivers/net/phy/microchip_t1s.c-589-\t\t.get_plca_cfg\t    = genphy_c45_plca_get_cfg,\n"
}

gemini-3.1-pro-preview

null

null

							input: 30761
							output: 27
							thoughts: 207
						

**Analyzing the SPI Driver and Syzkaller's Potential**

Okay, so the `lan865x` is an SPI device, got it. And `oa_tc6` is a framework for those OPEN Alliance 10BASE-T1x MAC-PHYs, the puzzle pieces are starting to fit. This patch is modifying `oa_tc6.c`, which makes me wonder if that file's even reachable – a fundamental question in this kind of analysis.

Right, so how does syzkaller play into this? I know it can fuzz SPI devices, either through pseudo devices using something like `syz_spi_setup`, or perhaps via `spidev` if there's a driver binding method. Typically, though, SPI drivers get bound through the device tree, right? And syzkaller isn't exactly brilliant at dynamically injecting device tree nodes unless it's using a function like `syz_dev_init` or the like.

But wait a minute, syzkaller has some cool pseudo-syscalls like `syz_genetlink_get_family` and other tricks up its sleeve. The question is, does it have anything dedicated to SPI? I need to check if there are any syzkaller descriptions specifically for `lan865x` or even just the `oa_tc6` framework itself. That's the next obvious step to see what syzkaller can do with this.

no matches

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

{
  "error": "no matches"
}

gemini-3.1-pro-preview

null

null

							input: 31313
							output: 26
							thoughts: 19
						

Okay, let's see. My first thought is: **Hunting for syzkaller Descriptions Related to 'oa_tc6'.**

I need to quickly determine if there are any existing syzkaller descriptions specifically for `oa_tc6`. This is a crucial first step. If I already have them, it saves time and allows me to assess what's already known. If they don't exist, well, then I'm going to have to do some deeper digging and potentially start creating those descriptions myself. It all hinges on this initial check. Gotta see what's out there first!

no matches

{
  "Expression": "oa_tc6",
  "PathPrefix": "net/"
}

{
  "error": "no matches"
}

gemini-3.1-pro-preview

null

null

							input: 31497
							output: 25
							thoughts: 25
						

Okay, let's dive into this. Here's my thought process on the matter:

**Checking for Existing Syzkaller Descriptions**

Alright, the task at hand is to see if there's any existing groundwork laid out for the `lan865x` hardware within the syzkaller framework. Before I start trying to reinvent the wheel, it's always prudent to check the existing code base. I'm going to scan the entire syzkaller tree to see if anyone has already started documenting or fuzzing anything related to that particular target. It saves significant time and effort to build on prior work if there is any. My goal here isn't necessarily to *find* something concrete to build upon, but to *rule out* that possibility first and be efficient in my approach. It's just smart to see what's already out there.

{
  "Expression": "lan865x",
  "PathPrefix": ""
}

{
  "Output": "MAINTAINERS=17469=F:\tDocumentation/devicetree/bindings/net/microchip,lan8650.yaml\nMAINTAINERS:17470:F:\tdrivers/net/ethernet/microchip/lan865x/lan865x.c\nMAINTAINERS-17471-\n--\ndrivers/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-{\ndrivers/net/ethernet/microchip/lan865x/lan865x.c-335-\tstruct net_device *netdev;\ndrivers/net/ethernet/microchip/lan865x/lan865x.c:336:\tstruct lan865x_priv *priv;\ndrivers/net/ethernet/microchip/lan865x/lan865x.c-337-\tint ret;\ndrivers/net/ethernet/microchip/lan865x/lan865x.c-338-\ndrivers/net/ethernet/microchip/lan865x/lan865x.c:339:\tnetdev = alloc_etherdev(sizeof(struct lan865x_priv));\ndrivers/net/ethernet/microchip/lan865x/lan865x.c-340-\tif (!netdev)\n--\ndrivers/net/ethernet/microchip/lan865x/lan865x.c-346-\tspi_set_drvdata(spi, priv);\ndrivers/net/ethernet/microchip/lan865x/lan865x.c:347:\tINIT_WORK(\u0026priv-\u003emulticast_work, lan865x_multicast_work_handler);\ndrivers/net/ethernet/microchip/lan865x/lan865x.c-348-\n--\ndrivers/net/ethernet/microchip/lan865x/lan865x.c-391-\ndrivers/net/ethernet/microchip/lan865x/lan865x.c:392:\tret = lan865x_set_hw_macaddr(priv, netdev-\u003edev_addr);\ndrivers/net/ethernet/microchip/lan865x/lan865x.c-393-\tif (ret) {\n--\ndrivers/net/ethernet/microchip/lan865x/lan865x.c-399-\tnetdev-\u003eirq = spi-\u003eirq;\ndrivers/net/ethernet/microchip/lan865x/lan865x.c:400:\tnetdev-\u003enetdev_ops = \u0026lan865x_netdev_ops;\ndrivers/net/ethernet/microchip/lan865x/lan865x.c:401:\tnetdev-\u003eethtool_ops = \u0026lan865x_ethtool_ops;\ndrivers/net/ethernet/microchip/lan865x/lan865x.c-402-\n--\ndrivers/net/ethernet/microchip/lan865x/lan865x.c-417-\ndrivers/net/ethernet/microchip/lan865x/lan865x.c:418:static void lan865x_remove(struct spi_device *spi)\ndrivers/net/ethernet/microchip/lan865x/lan865x.c-419-{\ndrivers/net/ethernet/microchip/lan865x/lan865x.c:420:\tstruct lan865x_priv *priv = spi_get_drvdata(spi);\ndrivers/net/ethernet/microchip/lan865x/lan865x.c-421-\n--\ndrivers/net/ethernet/microchip/lan865x/lan865x.c-427-\ndrivers/net/ethernet/microchip/lan865x/lan865x.c:428:static const struct spi_device_id lan865x_ids[] = {\ndrivers/net/ethernet/microchip/lan865x/lan865x.c-429-\t{ .name = \"lan8650\" },\n--\ndrivers/net/ethernet/microchip/lan865x/lan865x.c-432-};\ndrivers/net/ethernet/microchip/lan865x/lan865x.c:433:MODULE_DEVICE_TABLE(spi, lan865x_ids);\ndrivers/net/ethernet/microchip/lan865x/lan865x.c-434-\ndrivers/net/ethernet/microchip/lan865x/lan865x.c:435:static const struct of_device_id lan865x_dt_ids[] = {\ndrivers/net/ethernet/microchip/lan865x/lan865x.c-436-\t{ .compatible = \"microchip,lan8650\" },\n--\ndrivers/net/ethernet/microchip/lan865x/lan865x.c-439-};\ndrivers/net/ethernet/microchip/lan865x/lan865x.c:440:MODULE_DEVICE_TABLE(of, lan865x_dt_ids);\ndrivers/net/ethernet/microchip/lan865x/lan865x.c-441-\ndrivers/net/ethernet/microchip/lan865x/lan865x.c:442:static struct spi_driver lan865x_driver = {\ndrivers/net/ethernet/microchip/lan865x/lan865x.c-443-\t.driver = {\ndrivers/net/ethernet/microchip/lan865x/lan865x.c-444-\t\t.name = DRV_NAME,\ndrivers/net/ethernet/microchip/lan865x/lan865x.c:445:\t\t.of_match_table = lan865x_dt_ids,\ndrivers/net/ethernet/microchip/lan865x/lan865x.c-446-\t },\ndrivers/net/ethernet/microchip/lan865x/lan865x.c:447:\t.probe = lan865x_probe,\ndrivers/net/ethernet/microchip/lan865x/lan865x.c:448:\t.remove = lan865x_remove,\ndrivers/net/ethernet/microchip/lan865x/lan865x.c:449:\t.id_table = lan865x_ids,\ndrivers/net/ethernet/microchip/lan865x/lan865x.c-450-};\ndrivers/net/ethernet/microchip/lan865x/lan865x.c:451:module_spi_driver(lan865x_driver);\ndrivers/net/ethernet/microchip/lan865x/lan865x.c-452-\n--\ndrivers/net/phy/microchip_t1s.c=77=static const u16 lan867x_revb1_fixup_masks[12] = {\n--\ndrivers/net/phy/microchip_t1s.c-87- */\ndrivers/net/phy/microchip_t1s.c:88:static const u32 lan865x_revb_fixup_registers[17] = {\ndrivers/net/phy/microchip_t1s.c-89-\t0x00D0, 0x00E0, 0x00E9, 0x00F5,\n--\ndrivers/net/phy/microchip_t1s.c-95-\ndrivers/net/phy/microchip_t1s.c:96:static const u16 lan865x_revb_fixup_values[17] = {\ndrivers/net/phy/microchip_t1s.c-97-\t0x3F31, 0xC000, 0x9E50, 0x1CF8,\n--\ndrivers/net/phy/microchip_t1s.c-103-\ndrivers/net/phy/microchip_t1s.c:104:static const u16 lan865x_revb_fixup_cfg_regs[2] = {\ndrivers/net/phy/microchip_t1s.c-105-\t0x0084, 0x008A,\n--\ndrivers/net/phy/microchip_t1s.c-107-\ndrivers/net/phy/microchip_t1s.c:108:static const u32 lan865x_revb_sqi_fixup_regs[12] = {\ndrivers/net/phy/microchip_t1s.c-109-\t0x00B0, 0x00B1, 0x00B2, 0x00B3,\n--\ndrivers/net/phy/microchip_t1s.c-113-\ndrivers/net/phy/microchip_t1s.c:114:static const u16 lan865x_revb_sqi_fixup_values[12] = {\ndrivers/net/phy/microchip_t1s.c-115-\t0x0103, 0x0910, 0x1D26, 0x002A,\n--\ndrivers/net/phy/microchip_t1s.c-119-\ndrivers/net/phy/microchip_t1s.c:120:static const u16 lan865x_revb_sqi_fixup_cfg_regs[3] = {\ndrivers/net/phy/microchip_t1s.c-121-\t0x00AD, 0x00AE, 0x00AF,\n--\ndrivers/net/phy/microchip_t1s.c=134=static const u16 lan867x_revd0_fixup_values[8] = {\n--\ndrivers/net/phy/microchip_t1s.c-146- */\ndrivers/net/phy/microchip_t1s.c:147:static int lan865x_revb_indirect_read(struct phy_device *phydev, u16 addr)\ndrivers/net/phy/microchip_t1s.c-148-{\n--\ndrivers/net/phy/microchip_t1s.c-166- */\ndrivers/net/phy/microchip_t1s.c:167:static int lan865x_generate_cfg_offsets(struct phy_device *phydev, s8 offsets[])\ndrivers/net/phy/microchip_t1s.c-168-{\n--\ndrivers/net/phy/microchip_t1s.c-172-\tfor (int i = 0; i \u003c ARRAY_SIZE(fixup_regs); i++) {\ndrivers/net/phy/microchip_t1s.c:173:\t\tret = lan865x_revb_indirect_read(phydev, fixup_regs[i]);\ndrivers/net/phy/microchip_t1s.c-174-\t\tif (ret \u003c 0)\n--\ndrivers/net/phy/microchip_t1s.c-187-\ndrivers/net/phy/microchip_t1s.c:188:static int lan865x_read_cfg_params(struct phy_device *phydev,\ndrivers/net/phy/microchip_t1s.c-189-\t\t\t\t   const u16 cfg_regs[], u16 cfg_params[],\n--\ndrivers/net/phy/microchip_t1s.c-204-\ndrivers/net/phy/microchip_t1s.c:205:static int lan865x_write_cfg_params(struct phy_device *phydev,\ndrivers/net/phy/microchip_t1s.c-206-\t\t\t\t    const u16 cfg_regs[], u16 cfg_params[],\n--\ndrivers/net/phy/microchip_t1s.c-220-\ndrivers/net/phy/microchip_t1s.c:221:static int lan865x_setup_cfgparam(struct phy_device *phydev, s8 offsets[])\ndrivers/net/phy/microchip_t1s.c-222-{\ndrivers/net/phy/microchip_t1s.c:223:\tu16 cfg_results[ARRAY_SIZE(lan865x_revb_fixup_cfg_regs)];\ndrivers/net/phy/microchip_t1s.c:224:\tu16 cfg_params[ARRAY_SIZE(lan865x_revb_fixup_cfg_regs)];\ndrivers/net/phy/microchip_t1s.c-225-\tint ret;\ndrivers/net/phy/microchip_t1s.c-226-\ndrivers/net/phy/microchip_t1s.c:227:\tret = lan865x_read_cfg_params(phydev, lan865x_revb_fixup_cfg_regs,\ndrivers/net/phy/microchip_t1s.c-228-\t\t\t\t      cfg_params, ARRAY_SIZE(cfg_params));\n--\ndrivers/net/phy/microchip_t1s.c-236-\ndrivers/net/phy/microchip_t1s.c:237:\treturn lan865x_write_cfg_params(phydev, lan865x_revb_fixup_cfg_regs,\ndrivers/net/phy/microchip_t1s.c-238-\t\t\t\t\tcfg_results, ARRAY_SIZE(cfg_results));\n--\ndrivers/net/phy/microchip_t1s.c-240-\ndrivers/net/phy/microchip_t1s.c:241:static int lan865x_setup_sqi_cfgparam(struct phy_device *phydev, s8 offsets[])\ndrivers/net/phy/microchip_t1s.c-242-{\ndrivers/net/phy/microchip_t1s.c:243:\tu16 cfg_results[ARRAY_SIZE(lan865x_revb_sqi_fixup_cfg_regs)];\ndrivers/net/phy/microchip_t1s.c:244:\tu16 cfg_params[ARRAY_SIZE(lan865x_revb_sqi_fixup_cfg_regs)];\ndrivers/net/phy/microchip_t1s.c-245-\tint ret;\ndrivers/net/phy/microchip_t1s.c-246-\ndrivers/net/phy/microchip_t1s.c:247:\tret = lan865x_read_cfg_params(phydev, lan865x_revb_sqi_fixup_cfg_regs,\ndrivers/net/phy/microchip_t1s.c-248-\t\t\t\t      cfg_params, ARRAY_SIZE(cfg_params));\n--\ndrivers/net/phy/microchip_t1s.c-258-\ndrivers/net/phy/microchip_t1s.c:259:\treturn lan865x_write_cfg_params(phydev, lan865x_revb_sqi_fixup_cfg_regs,\ndrivers/net/phy/microchip_t1s.c-260-\t\t\t\t\tcfg_results, ARRAY_SIZE(cfg_results));\n--\ndrivers/net/phy/microchip_t1s.c-262-\ndrivers/net/phy/microchip_t1s.c:263:static int lan865x_revb_config_init(struct phy_device *phydev)\ndrivers/net/phy/microchip_t1s.c-264-{\n--\ndrivers/net/phy/microchip_t1s.c-270-\t */\ndrivers/net/phy/microchip_t1s.c:271:\tret = lan865x_generate_cfg_offsets(phydev, offsets);\ndrivers/net/phy/microchip_t1s.c-272-\tif (ret)\n--\ndrivers/net/phy/microchip_t1s.c-274-\ndrivers/net/phy/microchip_t1s.c:275:\tfor (int i = 0; i \u003c ARRAY_SIZE(lan865x_revb_fixup_registers); i++) {\ndrivers/net/phy/microchip_t1s.c-276-\t\tret = phy_write_mmd(phydev, MDIO_MMD_VEND2,\ndrivers/net/phy/microchip_t1s.c:277:\t\t\t\t    lan865x_revb_fixup_registers[i],\ndrivers/net/phy/microchip_t1s.c:278:\t\t\t\t    lan865x_revb_fixup_values[i]);\ndrivers/net/phy/microchip_t1s.c-279-\t\tif (ret)\n--\ndrivers/net/phy/microchip_t1s.c-282-\t\tif (i == 1) {\ndrivers/net/phy/microchip_t1s.c:283:\t\t\tret = lan865x_setup_cfgparam(phydev, offsets);\ndrivers/net/phy/microchip_t1s.c-284-\t\t\tif (ret)\n--\ndrivers/net/phy/microchip_t1s.c-288-\ndrivers/net/phy/microchip_t1s.c:289:\tret = lan865x_setup_sqi_cfgparam(phydev, offsets);\ndrivers/net/phy/microchip_t1s.c-290-\tif (ret)\n--\ndrivers/net/phy/microchip_t1s.c-292-\ndrivers/net/phy/microchip_t1s.c:293:\tfor (int i = 0; i \u003c ARRAY_SIZE(lan865x_revb_sqi_fixup_regs); i++) {\ndrivers/net/phy/microchip_t1s.c-294-\t\tret = phy_write_mmd(phydev, MDIO_MMD_VEND2,\ndrivers/net/phy/microchip_t1s.c:295:\t\t\t\t    lan865x_revb_sqi_fixup_regs[i],\ndrivers/net/phy/microchip_t1s.c:296:\t\t\t\t    lan865x_revb_sqi_fixup_values[i]);\ndrivers/net/phy/microchip_t1s.c-297-\t\tif (ret)\n--\ndrivers/net/phy/microchip_t1s.c=329=static int lan867x_revc_config_init(struct phy_device *phydev)\n--\ndrivers/net/phy/microchip_t1s.c-337-\ndrivers/net/phy/microchip_t1s.c:338:\tret = lan865x_generate_cfg_offsets(phydev, offsets);\ndrivers/net/phy/microchip_t1s.c-339-\tif (ret)\n--\ndrivers/net/phy/microchip_t1s.c-353-\t\tret = phy_write_mmd(phydev, MDIO_MMD_VEND2,\ndrivers/net/phy/microchip_t1s.c:354:\t\t\t\t    lan865x_revb_fixup_registers[i],\ndrivers/net/phy/microchip_t1s.c:355:\t\t\t\t    lan865x_revb_fixup_values[i]);\ndrivers/net/phy/microchip_t1s.c-356-\t\tif (ret)\n--\ndrivers/net/phy/microchip_t1s.c-359-\t\tif (i == 1) {\ndrivers/net/phy/microchip_t1s.c:360:\t\t\tret = lan865x_setup_cfgparam(phydev, offsets);\ndrivers/net/phy/microchip_t1s.c-361-\t\t\tif (ret)\n--\ndrivers/net/phy/microchip_t1s.c-365-\ndrivers/net/phy/microchip_t1s.c:366:\tret = lan865x_setup_sqi_cfgparam(phydev, offsets);\ndrivers/net/phy/microchip_t1s.c-367-\tif (ret)\n--\ndrivers/net/phy/microchip_t1s.c-369-\ndrivers/net/phy/microchip_t1s.c:370:\tfor (int i = 0; i \u003c ARRAY_SIZE(lan865x_revb_sqi_fixup_regs); i++) {\ndrivers/net/phy/microchip_t1s.c-371-\t\tret = phy_write_mmd(phydev, MDIO_MMD_VEND2,\ndrivers/net/phy/microchip_t1s.c:372:\t\t\t\t    lan865x_revb_sqi_fixup_regs[i],\ndrivers/net/phy/microchip_t1s.c:373:\t\t\t\t    lan865x_revb_sqi_fixup_values[i]);\ndrivers/net/phy/microchip_t1s.c-374-\t\tif (ret)\n--\ndrivers/net/phy/microchip_t1s.c=494=static int lan86xx_read_status(struct phy_device *phydev)\n--\ndrivers/net/phy/microchip_t1s.c-518- */\ndrivers/net/phy/microchip_t1s.c:519:static int lan865x_phy_read_mmd(struct phy_device *phydev, int devnum,\ndrivers/net/phy/microchip_t1s.c-520-\t\t\t\tu16 regnum)\n--\ndrivers/net/phy/microchip_t1s.c-527-\ndrivers/net/phy/microchip_t1s.c:528:static int lan865x_phy_write_mmd(struct phy_device *phydev, int devnum,\ndrivers/net/phy/microchip_t1s.c-529-\t\t\t\t u16 regnum, u16 val)\n--\ndrivers/net/phy/microchip_t1s.c=537=static struct phy_driver microchip_t1s_driver[] = {\n--\ndrivers/net/phy/microchip_t1s.c-584-\t\t.features           = PHY_BASIC_T1S_P2MP_FEATURES,\ndrivers/net/phy/microchip_t1s.c:585:\t\t.config_init        = lan865x_revb_config_init,\ndrivers/net/phy/microchip_t1s.c-586-\t\t.read_status        = lan86xx_read_status,\ndrivers/net/phy/microchip_t1s.c:587:\t\t.read_mmd           = lan865x_phy_read_mmd,\ndrivers/net/phy/microchip_t1s.c:588:\t\t.write_mmd          = lan865x_phy_write_mmd,\ndrivers/net/phy/microchip_t1s.c-589-\t\t.get_plca_cfg\t    = genphy_c45_plca_get_cfg,\n"
}

gemini-3.1-pro-preview

null

null

							input: 42081
							output: 26
							thoughts: 145
						

**My Initial Thoughts on SPI Driver Fuzzing**

Okay, so I'm thinking about how to effectively fuzz this `lan865x` driver using syzkaller. I know syzkaller has some built-in support for SPI devices, specifically if they're accessed via `spidev`. But that's not a general solution for fuzzing *any* SPI driver. It relies on a known syzkaller description for the specific device, right?

Then I recalled syzkaller does provide generic instantiation functions like `syz_dev_init` or `syz_usb_connect`. The question then is, how do I go about instantiating `lan865x`? It won't be reachable unless it's instantiated. That is the hurdle.

Then I had a eureka moment... did syzkaller add a more generic SPI setup function recently? I thought I recalled reading something about `syz_spi_setup`. I need to verify if that even exists because that could be the key to unlocking this fuzzing challenge. I should check the source, and make sure that function actually exists.

no matches

{
  "Expression": "syz_spi_setup",
  "PathPrefix": ""
}

{
  "error": "no matches"
}

gemini-3.1-pro-preview

null

null

							input: 42503
							output: 26
							thoughts: 275
						

**My Assessment of the `lan865x` Driver and Syzkaller Fuzzing Potential**

Okay, so I'm looking at this `oa_tc6` code and trying to figure out how to fuzz it effectively with Syzkaller. My initial thought was to use something like `spi_new_device`, but then I remembered Syzkaller doesn't have a generic SPI fuzzer. That's a non-starter.

Then I considered `syz_dev_init`. Doesn't Syzkaller have a way to dynamically instantiate devices? No, that's not quite right. Syzkaller uses primitives like `syz_usb_connect`, `syz_80211_inject_frame`, `syz_genetlink_get_family`, etc. I need to think in terms of those existing mechanisms.

Aha! Syzkaller *does* instantiate devices through specific virtual interfaces: `vhci` for USB, `mac80211_hwsim` for wifi, `uinput` for input, `hci` for bluetooth, `vcan` for CAN, `tun`/`tap` for netdevs. But `lan865x` is an SPI device. The question is, how do I create this particular SPI device virtually?

`spidev` seemed promising at first. It's the character device used for userspace communication with SPI devices. But, no, that won't work. `spidev` is for userspace access, not for driver instantiation. It won't bring the kernel driver into existence, so that won't work.

Then I considered device tree overlays. Perhaps I could configure the device through an overlay. But no, Syzkaller doesn't support those, at least not directly. I'm hitting a wall here.

If there's no way to bring `lan865x` into the virtual environment, then the `oa_tc6` code path is essentially unreachable under Syzkaller's current configuration. That's a significant problem, and something I need to address. This means the fuzzing will be incomplete.

Okay, I need to understand the implications of this. Before I give up on this entirely, I want to see if `oa_tc6` is used anywhere else. If it's a critical piece of something bigger, I really need to find a way to get it fuzzed.

{
  "Expression": "oa_tc6_init",
  "PathPrefix": ""
}

{
  "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/microchip/lan865x/lan865x.c=333=static int lan865x_probe(struct spi_device *spi)\n--\ndrivers/net/ethernet/microchip/lan865x/lan865x.c-348-\ndrivers/net/ethernet/microchip/lan865x/lan865x.c:349:\tpriv-\u003etc6 = oa_tc6_init(spi, netdev);\ndrivers/net/ethernet/microchip/lan865x/lan865x.c-350-\tif (!priv-\u003etc6) {\n--\ndrivers/net/ethernet/oa_tc6.c=1294=EXPORT_SYMBOL_GPL(oa_tc6_start_xmit);\n--\ndrivers/net/ethernet/oa_tc6.c-1296-/**\ndrivers/net/ethernet/oa_tc6.c:1297: * oa_tc6_init - allocates and initializes oa_tc6 structure.\ndrivers/net/ethernet/oa_tc6.c-1298- * @spi: device with which data will be exchanged.\n--\ndrivers/net/ethernet/oa_tc6.c-1303- */\ndrivers/net/ethernet/oa_tc6.c:1304:struct oa_tc6 *oa_tc6_init(struct spi_device *spi, struct net_device *netdev)\ndrivers/net/ethernet/oa_tc6.c-1305-{\n--\ndrivers/net/ethernet/oa_tc6.c-1408-}\ndrivers/net/ethernet/oa_tc6.c:1409:EXPORT_SYMBOL_GPL(oa_tc6_init);\ndrivers/net/ethernet/oa_tc6.c-1410-\n--\ninclude/linux/oa_tc6.h=13=struct oa_tc6;\ninclude/linux/oa_tc6.h-14-\ninclude/linux/oa_tc6.h:15:struct oa_tc6 *oa_tc6_init(struct spi_device *spi, struct net_device *netdev);\ninclude/linux/oa_tc6.h-16-void oa_tc6_exit(struct oa_tc6 *tc6);\n"
}

gemini-3.1-pro-preview

null

null

							input: 44033
							output: 27
							thoughts: 257
						

**My Current Investigation into Syzkaller and SPI Device Instantiation**

Okay, so I'm focusing on the `lan865x` driver – it seems to be the only one utilizing the `oa_tc6` function. Now, I'm trying to figure out if and how Syzkaller can actually instantiate an SPI device for testing this driver.

The crux of the matter is Syzkaller's device instantiation capabilities. It can create devices in a couple of ways: through a mock driver or via `sysfs` binding. For SPI specifically, there are options like `spi-mockup` and `spi-loopback-test`, but those don't seem to give me the flexibility to instantiate *any* arbitrary driver, which is what I need.

Ah, wait a minute... can I leverage userspace to instantiate an SPI device using `sysfs`? Could I do something like `echo lan8650 > /sys/bus/spi/devices/spi0.0/driver_override` and then bind it with `echo spi0.0 > /sys/bus/spi/drivers/lan865x/bind`? That's the key: it would work *if* I have a functional `spi0.0` device available in the environment.

So, the next question becomes: does the Syzkaller environment actually provide an SPI bus? I need to check the Syzkaller configuration. Let me look for SPI master drivers that are enabled. The usual suspects would be `CONFIG_SPI_MOCKUP`, `CONFIG_SPI_LOOPBACK_TEST`, or maybe `CONFIG_SPI_VIRTUAL`. Let's see if there is any virtual SPI master configured.

{
  "Expression": "config SPI_",
  "PathPrefix": "drivers/spi/"
}

{
  "Output": "\nFull output is too long, showing 500 out of 660 lines.\nUse more precise expression if possible.\n\ndrivers/spi/Kconfig=26=if SPI\ndrivers/spi/Kconfig-27-\ndrivers/spi/Kconfig:28:config SPI_DEBUG\ndrivers/spi/Kconfig-29-\tbool \"Debug support for SPI drivers\"\n--\ndrivers/spi/Kconfig-38-\ndrivers/spi/Kconfig:39:config SPI_MASTER\ndrivers/spi/Kconfig-40-#\tbool \"SPI Master Support\"\n--\ndrivers/spi/Kconfig=49=if SPI_MASTER\ndrivers/spi/Kconfig-50-\ndrivers/spi/Kconfig:51:config SPI_MEM\ndrivers/spi/Kconfig-52-\tbool \"SPI memory extension\"\n--\ndrivers/spi/Kconfig-57-\ndrivers/spi/Kconfig:58:config SPI_OFFLOAD\ndrivers/spi/Kconfig-59-\tbool\n--\ndrivers/spi/Kconfig=61=comment \"SPI Master Controller Drivers\"\ndrivers/spi/Kconfig-62-\ndrivers/spi/Kconfig:63:config SPI_AIROHA_SNFI\ndrivers/spi/Kconfig-64-\ttristate \"Airoha SPI NAND Flash Interface\"\n--\ndrivers/spi/Kconfig-72-\ndrivers/spi/Kconfig:73:config SPI_ALTERA\ndrivers/spi/Kconfig-74-\ttristate \"Altera SPI Controller platform driver\"\n--\ndrivers/spi/Kconfig-79-\ndrivers/spi/Kconfig:80:config SPI_ALTERA_CORE\ndrivers/spi/Kconfig-81-\ttristate \"Altera SPI Controller core code\" if COMPILE_TEST\n--\ndrivers/spi/Kconfig-85-\ndrivers/spi/Kconfig:86:config SPI_ALTERA_DFL\ndrivers/spi/Kconfig-87-\ttristate \"DFL bus driver for Altera SPI Controller\"\n--\ndrivers/spi/Kconfig-94-\ndrivers/spi/Kconfig:95:config SPI_AMLOGIC_SPIFC_A1\ndrivers/spi/Kconfig-96-\ttristate \"Amlogic A1 SPIFC controller\"\n--\ndrivers/spi/Kconfig-101-\ndrivers/spi/Kconfig:102:config SPI_AMLOGIC_SPIFC_A4\ndrivers/spi/Kconfig-103-\ttristate \"Amlogic A4 SPI Flash controller\"\n--\ndrivers/spi/Kconfig-111-\ndrivers/spi/Kconfig:112:config SPI_AMLOGIC_SPISG\ndrivers/spi/Kconfig-113-\ttristate \"Amlogic SPISG controller\"\n--\ndrivers/spi/Kconfig-120-\ndrivers/spi/Kconfig:121:config SPI_APPLE\ndrivers/spi/Kconfig-122-\ttristate \"Apple SoC SPI Controller platform driver\"\n--\ndrivers/spi/Kconfig-131-\ndrivers/spi/Kconfig:132:config SPI_AR934X\ndrivers/spi/Kconfig-133-\ttristate \"Qualcomm Atheros AR934X/QCA95XX SPI controller driver\"\n--\ndrivers/spi/Kconfig-138-\ndrivers/spi/Kconfig:139:config SPI_ATCSPI200\ndrivers/spi/Kconfig-140-\ttristate \"Andes ATCSPI200 SPI controller\"\n--\ndrivers/spi/Kconfig-147-\ndrivers/spi/Kconfig:148:config SPI_ATH79\ndrivers/spi/Kconfig-149-\ttristate \"Atheros AR71XX/AR724X/AR913X SPI controller driver\"\n--\ndrivers/spi/Kconfig-155-\ndrivers/spi/Kconfig:156:config SPI_ARMADA_3700\ndrivers/spi/Kconfig-157-\ttristate \"Marvell Armada 3700 SPI Controller\"\n--\ndrivers/spi/Kconfig-162-\ndrivers/spi/Kconfig:163:config SPI_ASPEED_SMC\ndrivers/spi/Kconfig-164-\ttristate \"Aspeed flash controllers in SPI mode\"\n--\ndrivers/spi/Kconfig-173-\ndrivers/spi/Kconfig:174:config SPI_ATMEL\ndrivers/spi/Kconfig-175-\ttristate \"Atmel SPI Controller\"\n--\ndrivers/spi/Kconfig-181-\ndrivers/spi/Kconfig:182:config SPI_AT91_USART\ndrivers/spi/Kconfig-183-\ttristate \"Atmel USART Controller SPI driver\"\n--\ndrivers/spi/Kconfig-189-\ndrivers/spi/Kconfig:190:config SPI_ATMEL_QUADSPI\ndrivers/spi/Kconfig-191-\ttristate \"Atmel Quad SPI Controller\"\n--\ndrivers/spi/Kconfig-198-\ndrivers/spi/Kconfig:199:config SPI_AU1550\ndrivers/spi/Kconfig-200-\ttristate \"Au1550/Au1200/Au1300 SPI Controller\"\n--\ndrivers/spi/Kconfig-206-\ndrivers/spi/Kconfig:207:config SPI_AXI_SPI_ENGINE\ndrivers/spi/Kconfig-208-\ttristate \"Analog Devices AXI SPI Engine controller\"\n--\ndrivers/spi/Kconfig-215-\ndrivers/spi/Kconfig:216:config SPI_AXIADO\ndrivers/spi/Kconfig-217-\ttristate \"Axiado DB-H SPI controller\"\n--\ndrivers/spi/Kconfig-226-\ndrivers/spi/Kconfig:227:config SPI_BCM2835\ndrivers/spi/Kconfig-228-\ttristate \"BCM2835 SPI controller\"\n--\ndrivers/spi/Kconfig-238-\ndrivers/spi/Kconfig:239:config SPI_BCM2835AUX\ndrivers/spi/Kconfig-240-\ttristate \"BCM2835 SPI auxiliary controller\"\n--\ndrivers/spi/Kconfig-248-\ndrivers/spi/Kconfig:249:config SPI_BCM63XX\ndrivers/spi/Kconfig-250-\ttristate \"Broadcom BCM63xx SPI controller\"\n--\ndrivers/spi/Kconfig-254-\ndrivers/spi/Kconfig:255:config SPI_BCM63XX_HSSPI\ndrivers/spi/Kconfig-256-\ttristate \"Broadcom BCM63XX HS SPI controller driver\"\n--\ndrivers/spi/Kconfig-261-\ndrivers/spi/Kconfig:262:config SPI_BCM_QSPI\ndrivers/spi/Kconfig-263-\ttristate \"Broadcom BSPI and MSPI controller support\"\n--\ndrivers/spi/Kconfig-272-\ndrivers/spi/Kconfig:273:config SPI_BCMBCA_HSSPI\ndrivers/spi/Kconfig-274-\ttristate \"Broadcom BCMBCA HS SPI controller driver\"\n--\ndrivers/spi/Kconfig-281-\ndrivers/spi/Kconfig:282:config SPI_BITBANG\ndrivers/spi/Kconfig-283-\ttristate \"Utilities for Bitbanging SPI host controllers\"\n--\ndrivers/spi/Kconfig-294-\ndrivers/spi/Kconfig:295:config SPI_BUTTERFLY\ndrivers/spi/Kconfig-296-\ttristate \"Parallel port adapter for AVR Butterfly (DEVELOPMENT)\"\n--\ndrivers/spi/Kconfig-304-\ndrivers/spi/Kconfig:305:config SPI_CADENCE\ndrivers/spi/Kconfig-306-\ttristate \"Cadence SPI controller\"\n--\ndrivers/spi/Kconfig-310-\ndrivers/spi/Kconfig:311:config SPI_CADENCE_QUADSPI\ndrivers/spi/Kconfig-312-\ttristate \"Cadence Quad SPI controller\"\n--\ndrivers/spi/Kconfig-321-\ndrivers/spi/Kconfig:322:config SPI_CADENCE_XSPI\ndrivers/spi/Kconfig-323-\ttristate \"Cadence XSPI controller\"\n--\ndrivers/spi/Kconfig-333-\ndrivers/spi/Kconfig:334:config SPI_CH341\ndrivers/spi/Kconfig-335-\ttristate \"CH341 USB2SPI adapter\"\n--\ndrivers/spi/Kconfig-339-\ndrivers/spi/Kconfig:340:config SPI_CLPS711X\ndrivers/spi/Kconfig-341-\ttristate \"CLPS711X host SPI controller\"\n--\ndrivers/spi/Kconfig-346-\ndrivers/spi/Kconfig:347:config SPI_COLDFIRE_QSPI\ndrivers/spi/Kconfig-348-\ttristate \"Freescale Coldfire QSPI controller\"\n--\ndrivers/spi/Kconfig-353-\ndrivers/spi/Kconfig:354:config SPI_CS42L43\ndrivers/spi/Kconfig-355-\ttristate \"Cirrus Logic CS42L43 SPI controller\"\n--\ndrivers/spi/Kconfig-361-\ndrivers/spi/Kconfig:362:config SPI_DAVINCI\ndrivers/spi/Kconfig-363-\ttristate \"Texas Instruments DaVinci/DA8x/OMAP-L/AM1x SoC SPI controller\"\n--\ndrivers/spi/Kconfig-368-\ndrivers/spi/Kconfig:369:config SPI_DESIGNWARE\ndrivers/spi/Kconfig-370-\ttristate \"DesignWare SPI controller core support\"\n--\ndrivers/spi/Kconfig=375=if SPI_DESIGNWARE\ndrivers/spi/Kconfig-376-\ndrivers/spi/Kconfig:377:config SPI_DW_DMA\ndrivers/spi/Kconfig-378-\tbool \"DMA support for DW SPI controller\"\ndrivers/spi/Kconfig-379-\ndrivers/spi/Kconfig:380:config SPI_DW_PCI\ndrivers/spi/Kconfig-381-\ttristate \"PCI interface driver for DW SPI core\"\n--\ndrivers/spi/Kconfig-383-\ndrivers/spi/Kconfig:384:config SPI_DW_MMIO\ndrivers/spi/Kconfig-385-\ttristate \"Memory-mapped io interface driver for DW SPI core\"\n--\ndrivers/spi/Kconfig=388=endif\ndrivers/spi/Kconfig-389-\ndrivers/spi/Kconfig:390:config SPI_DLN2\ndrivers/spi/Kconfig-391-       tristate \"Diolan DLN-2 USB SPI adapter\"\n--\ndrivers/spi/Kconfig-399-\ndrivers/spi/Kconfig:400:config SPI_EP93XX\ndrivers/spi/Kconfig-401-\ttristate \"Cirrus Logic EP93xx SPI controller\"\n--\ndrivers/spi/Kconfig-406-\ndrivers/spi/Kconfig:407:config SPI_FALCON\ndrivers/spi/Kconfig-408-\tbool \"Falcon SPI controller support\"\n--\ndrivers/spi/Kconfig-415-\ndrivers/spi/Kconfig:416:config SPI_FSI\ndrivers/spi/Kconfig-417-\ttristate \"FSI SPI driver\"\n--\ndrivers/spi/Kconfig-422-\ndrivers/spi/Kconfig:423:config SPI_FSL_LPSPI\ndrivers/spi/Kconfig-424-\ttristate \"Freescale i.MX LPSPI controller\"\n--\ndrivers/spi/Kconfig-428-\ndrivers/spi/Kconfig:429:config SPI_FSL_QUADSPI\ndrivers/spi/Kconfig-430-\ttristate \"Freescale QSPI controller\"\n--\ndrivers/spi/Kconfig-440-\ndrivers/spi/Kconfig:441:config SPI_GXP\ndrivers/spi/Kconfig-442-\ttristate \"GXP SPI driver\"\n--\ndrivers/spi/Kconfig-447-\ndrivers/spi/Kconfig:448:config SPI_HISI_KUNPENG\ndrivers/spi/Kconfig-449-\ttristate \"HiSilicon SPI Controller for Kunpeng SoCs\"\n--\ndrivers/spi/Kconfig-457-\ndrivers/spi/Kconfig:458:config SPI_HISI_SFC_V3XX\ndrivers/spi/Kconfig-459-\ttristate \"HiSilicon SPI NOR Flash Controller for Hi16XX chipsets\"\n--\ndrivers/spi/Kconfig-465-\ndrivers/spi/Kconfig:466:config SPI_NXP_FLEXSPI\ndrivers/spi/Kconfig-467-\ttristate \"NXP Flex SPI controller\"\n--\ndrivers/spi/Kconfig-476-\ndrivers/spi/Kconfig:477:config SPI_NXP_XSPI\ndrivers/spi/Kconfig-478-        tristate \"NXP xSPI controller\"\n--\ndrivers/spi/Kconfig-486-\ndrivers/spi/Kconfig:487:config SPI_GPIO\ndrivers/spi/Kconfig-488-\ttristate \"GPIO-based bitbanging SPI Master\"\n--\ndrivers/spi/Kconfig-502-\ndrivers/spi/Kconfig:503:config SPI_IMG_SPFI\ndrivers/spi/Kconfig-504-\ttristate \"IMG SPFI controller\"\n--\ndrivers/spi/Kconfig-509-\ndrivers/spi/Kconfig:510:config SPI_IMX\ndrivers/spi/Kconfig-511-\ttristate \"Freescale i.MX SPI controllers\"\n--\ndrivers/spi/Kconfig-515-\ndrivers/spi/Kconfig:516:config SPI_INGENIC\ndrivers/spi/Kconfig-517-\ttristate \"Ingenic SoCs SPI controller\"\n--\ndrivers/spi/Kconfig-524-\ndrivers/spi/Kconfig:525:config SPI_INTEL\ndrivers/spi/Kconfig-526-\ttristate\ndrivers/spi/Kconfig-527-\ndrivers/spi/Kconfig:528:config SPI_INTEL_PCI\ndrivers/spi/Kconfig-529-\ttristate \"Intel PCH/PCU SPI flash PCI driver\"\n--\ndrivers/spi/Kconfig-545-\ndrivers/spi/Kconfig:546:config SPI_INTEL_PLATFORM\ndrivers/spi/Kconfig-547-\ttristate \"Intel PCH/PCU SPI flash platform driver (DANGEROUS)\"\n--\ndrivers/spi/Kconfig-564-\ndrivers/spi/Kconfig:565:config SPI_JCORE\ndrivers/spi/Kconfig-566-\ttristate \"J-Core SPI Master\"\n--\ndrivers/spi/Kconfig-571-\ndrivers/spi/Kconfig:572:config SPI_KSPI2\ndrivers/spi/Kconfig-573-\ttristate \"Support for KEBA SPI master type 2 hardware\"\n--\ndrivers/spi/Kconfig-583-\ndrivers/spi/Kconfig:584:config SPI_LM70_LLP\ndrivers/spi/Kconfig-585-\ttristate \"Parallel port adapter for LM70 eval board (DEVELOPMENT)\"\n--\ndrivers/spi/Kconfig-592-\ndrivers/spi/Kconfig:593:config SPI_LOONGSON_CORE\ndrivers/spi/Kconfig-594-\ttristate\n--\ndrivers/spi/Kconfig-596-\ndrivers/spi/Kconfig:597:config SPI_LOONGSON_PCI\ndrivers/spi/Kconfig-598-\ttristate \"Loongson SPI Controller PCI Driver Support\"\n--\ndrivers/spi/Kconfig-607-\ndrivers/spi/Kconfig:608:config SPI_LOONGSON_PLATFORM\ndrivers/spi/Kconfig-609-\ttristate \"Loongson SPI Controller Platform Driver Support\"\n--\ndrivers/spi/Kconfig-618-\ndrivers/spi/Kconfig:619:config SPI_LP8841_RTC\ndrivers/spi/Kconfig-620-\ttristate \"ICP DAS LP-8841 SPI Controller for RTC\"\n--\ndrivers/spi/Kconfig-628-\ndrivers/spi/Kconfig:629:config SPI_MPC52xx\ndrivers/spi/Kconfig-630-\ttristate \"Freescale MPC52xx SPI (non-PSC) controller support\"\n--\ndrivers/spi/Kconfig-635-\ndrivers/spi/Kconfig:636:config SPI_MPC52xx_PSC\ndrivers/spi/Kconfig-637-\ttristate \"Freescale MPC52xx PSC SPI controller\"\n--\ndrivers/spi/Kconfig-642-\ndrivers/spi/Kconfig:643:config SPI_MPC512x_PSC\ndrivers/spi/Kconfig-644-\ttristate \"Freescale MPC512x PSC SPI controller\"\n--\ndrivers/spi/Kconfig-649-\ndrivers/spi/Kconfig:650:config SPI_FSL_LIB\ndrivers/spi/Kconfig-651-\ttristate\n--\ndrivers/spi/Kconfig-653-\ndrivers/spi/Kconfig:654:config SPI_FSL_CPM\ndrivers/spi/Kconfig-655-\ttristate\n--\ndrivers/spi/Kconfig-657-\ndrivers/spi/Kconfig:658:config SPI_FSL_SPI\ndrivers/spi/Kconfig-659-\ttristate \"Freescale SPI controller and Aeroflex Gaisler GRLIB SPI controller\"\n--\ndrivers/spi/Kconfig-669-\ndrivers/spi/Kconfig:670:config SPI_FSL_DSPI\ndrivers/spi/Kconfig-671-\ttristate \"Freescale DSPI controller\"\n--\ndrivers/spi/Kconfig-677-\ndrivers/spi/Kconfig:678:config SPI_FSL_ESPI\ndrivers/spi/Kconfig-679-\ttristate \"Freescale eSPI controller\"\n--\ndrivers/spi/Kconfig-685-\ndrivers/spi/Kconfig:686:config SPI_LJCA\ndrivers/spi/Kconfig-687-\ttristate \"Intel La Jolla Cove Adapter SPI support\"\n--\ndrivers/spi/Kconfig-696-\ndrivers/spi/Kconfig:697:config SPI_MESON_SPICC\ndrivers/spi/Kconfig-698-\ttristate \"Amlogic Meson SPICC controller\"\n--\ndrivers/spi/Kconfig-704-\ndrivers/spi/Kconfig:705:config SPI_MESON_SPIFC\ndrivers/spi/Kconfig-706-\ttristate \"Amlogic Meson SPIFC controller\"\n--\ndrivers/spi/Kconfig-712-\ndrivers/spi/Kconfig:713:config SPI_MICROCHIP_CORE_QSPI\ndrivers/spi/Kconfig-714-\ttristate \"Microchip FPGA QSPI controllers\"\n--\ndrivers/spi/Kconfig-721-\ndrivers/spi/Kconfig:722:config SPI_MICROCHIP_CORE_SPI\ndrivers/spi/Kconfig-723-\ttristate \"Microchip FPGA CoreSPI controller\"\n--\ndrivers/spi/Kconfig-730-\ndrivers/spi/Kconfig:731:config SPI_MT65XX\ndrivers/spi/Kconfig-732-\ttristate \"MediaTek SPI controller\"\n--\ndrivers/spi/Kconfig-739-\ndrivers/spi/Kconfig:740:config SPI_MT7621\ndrivers/spi/Kconfig-741-\ttristate \"MediaTek MT7621 SPI Controller\"\n--\ndrivers/spi/Kconfig-745-\ndrivers/spi/Kconfig:746:config SPI_MTK_NOR\ndrivers/spi/Kconfig-747-\ttristate \"MediaTek SPI NOR controller\"\n--\ndrivers/spi/Kconfig-755-\ndrivers/spi/Kconfig:756:config SPI_MTK_SNFI\ndrivers/spi/Kconfig-757-\ttristate \"MediaTek SPI NAND Flash Interface\"\n--\ndrivers/spi/Kconfig-765-\ndrivers/spi/Kconfig:766:config SPI_WPCM_FIU\ndrivers/spi/Kconfig-767-\ttristate \"Nuvoton WPCM450 Flash Interface Unit\"\n--\ndrivers/spi/Kconfig-776-\ndrivers/spi/Kconfig:777:config SPI_NPCM_FIU\ndrivers/spi/Kconfig-778-\ttristate \"Nuvoton NPCM FLASH Interface Unit\"\n--\ndrivers/spi/Kconfig-786-\ndrivers/spi/Kconfig:787:config SPI_NPCM_PSPI\ndrivers/spi/Kconfig-788-\ttristate \"Nuvoton NPCM PSPI Controller\"\n--\ndrivers/spi/Kconfig-793-\ndrivers/spi/Kconfig:794:config SPI_LANTIQ_SSC\ndrivers/spi/Kconfig-795-\ttristate \"Lantiq SSC SPI controller\"\n--\ndrivers/spi/Kconfig-801-\ndrivers/spi/Kconfig:802:config SPI_OC_TINY\ndrivers/spi/Kconfig-803-\ttristate \"OpenCores tiny SPI\"\n--\ndrivers/spi/Kconfig-808-\ndrivers/spi/Kconfig:809:config SPI_OCTEON\ndrivers/spi/Kconfig-810-\ttristate \"Cavium OCTEON SPI controller\"\n--\ndrivers/spi/Kconfig-815-\ndrivers/spi/Kconfig:816:config SPI_OMAP_UWIRE\ndrivers/spi/Kconfig-817-\ttristate \"OMAP1 MicroWire\"\n--\ndrivers/spi/Kconfig-822-\ndrivers/spi/Kconfig:823:config SPI_OMAP24XX\ndrivers/spi/Kconfig-824-\ttristate \"McSPI driver for OMAP\"\n--\ndrivers/spi/Kconfig-830-\ndrivers/spi/Kconfig:831:config SPI_TI_QSPI\ndrivers/spi/Kconfig-832-\ttristate \"DRA7xxx QSPI controller support\"\n--\ndrivers/spi/Kconfig-838-\ndrivers/spi/Kconfig:839:config SPI_ORION\ndrivers/spi/Kconfig-840-\ttristate \"Orion SPI master\"\n--\ndrivers/spi/Kconfig-845-\ndrivers/spi/Kconfig:846:config SPI_PCI1XXXX\ndrivers/spi/Kconfig-847-\ttristate \"PCI1XXXX SPI Bus support\"\n--\ndrivers/spi/Kconfig-854-\ndrivers/spi/Kconfig:855:config SPI_PIC32\ndrivers/spi/Kconfig-856-\ttristate \"Microchip PIC32 series SPI\"\n--\ndrivers/spi/Kconfig-860-\ndrivers/spi/Kconfig:861:config SPI_PIC32_SQI\ndrivers/spi/Kconfig-862-\ttristate \"Microchip PIC32 Quad SPI driver\"\n--\ndrivers/spi/Kconfig-866-\ndrivers/spi/Kconfig:867:config SPI_PL022\ndrivers/spi/Kconfig-868-\ttristate \"ARM AMBA PL022 SSP controller\"\n--\ndrivers/spi/Kconfig-877-\ndrivers/spi/Kconfig:878:config SPI_POLARFIRE_SOC\ndrivers/spi/Kconfig-879-\ttristate \"Microchip FPGA SPI controllers\"\n--\ndrivers/spi/Kconfig-887-\ndrivers/spi/Kconfig:888:config SPI_PPC4xx\ndrivers/spi/Kconfig-889-\ttristate \"PPC4xx SPI Controller\"\n--\ndrivers/spi/Kconfig-894-\ndrivers/spi/Kconfig:895:config SPI_PXA2XX\ndrivers/spi/Kconfig-896-\ttristate \"PXA2xx SSP SPI master\"\n--\ndrivers/spi/Kconfig-902-\ndrivers/spi/Kconfig:903:config SPI_PXA2XX_PCI\ndrivers/spi/Kconfig-904-\tdef_tristate SPI_PXA2XX \u0026\u0026 PCI \u0026\u0026 COMMON_CLK\ndrivers/spi/Kconfig-905-\ndrivers/spi/Kconfig:906:config SPI_REALTEK_SNAND\ndrivers/spi/Kconfig-907-\ttristate \"Realtek SPI-NAND Flash Controller\"\n--\ndrivers/spi/Kconfig-916-\ndrivers/spi/Kconfig:917:config SPI_ROCKCHIP\ndrivers/spi/Kconfig-918-\ttristate \"Rockchip SPI controller driver\"\n--\ndrivers/spi/Kconfig-928-\ndrivers/spi/Kconfig:929:config SPI_ROCKCHIP_SFC\ndrivers/spi/Kconfig-930-\ttristate \"Rockchip Serial Flash Controller (SFC)\"\n--\ndrivers/spi/Kconfig-940-\ndrivers/spi/Kconfig:941:config SPI_RB4XX\ndrivers/spi/Kconfig-942-\ttristate \"Mikrotik RB4XX SPI master\"\n--\ndrivers/spi/Kconfig-947-\ndrivers/spi/Kconfig:948:config SPI_RPCIF\ndrivers/spi/Kconfig-949-\ttristate \"Renesas RPC-IF SPI driver\"\n--\ndrivers/spi/Kconfig-953-\ndrivers/spi/Kconfig:954:config SPI_RSPI\ndrivers/spi/Kconfig-955-\ttristate \"Renesas RSPI/QSPI controller\"\n--\ndrivers/spi/Kconfig-959-\ndrivers/spi/Kconfig:960:config SPI_RZV2H_RSPI\ndrivers/spi/Kconfig-961-\ttristate \"Renesas RZ/V2H RSPI controller\"\n--\ndrivers/spi/Kconfig-967-\ndrivers/spi/Kconfig:968:config SPI_RZV2M_CSI\ndrivers/spi/Kconfig-969-\ttristate \"Renesas RZ/V2M CSI controller\"\n--\ndrivers/spi/Kconfig-974-\ndrivers/spi/Kconfig:975:config SPI_QCOM_QSPI\ndrivers/spi/Kconfig-976-\ttristate \"QTI QSPI controller\"\n--\ndrivers/spi/Kconfig-980-\ndrivers/spi/Kconfig:981:config SPI_QPIC_SNAND\ndrivers/spi/Kconfig-982-\ttristate \"QPIC SNAND controller\"\n--\ndrivers/spi/Kconfig-989-\ndrivers/spi/Kconfig:990:config SPI_QUP\ndrivers/spi/Kconfig-991-\ttristate \"Qualcomm SPI controller with QUP interface\"\n--\ndrivers/spi/Kconfig-1002-\ndrivers/spi/Kconfig:1003:config SPI_QCOM_GENI\ndrivers/spi/Kconfig-1004-\ttristate \"Qualcomm GENI based SPI controller\"\n--\ndrivers/spi/Kconfig-1014-\ndrivers/spi/Kconfig:1015:config SPI_S3C64XX\ndrivers/spi/Kconfig-1016-\ttristate \"Samsung S3C64XX/Exynos SoC series type SPI\"\n--\ndrivers/spi/Kconfig-1021-\ndrivers/spi/Kconfig:1022:config SPI_SC18IS602\ndrivers/spi/Kconfig-1023-\ttristate \"NXP SC18IS602/602B/603 I2C to SPI bridge\"\n--\ndrivers/spi/Kconfig-1027-\ndrivers/spi/Kconfig:1028:config SPI_SH_MSIOF\ndrivers/spi/Kconfig-1029-\ttristate \"SuperH MSIOF SPI controller\"\n--\ndrivers/spi/Kconfig-1034-\ndrivers/spi/Kconfig:1035:config SPI_SH\ndrivers/spi/Kconfig-1036-\ttristate \"SuperH SPI controller\"\n--\ndrivers/spi/Kconfig-1040-\ndrivers/spi/Kconfig:1041:config SPI_SH_SCI\ndrivers/spi/Kconfig-1042-\ttristate \"SuperH SCI SPI controller\"\n--\ndrivers/spi/Kconfig-1047-\ndrivers/spi/Kconfig:1048:config SPI_SH_HSPI\ndrivers/spi/Kconfig-1049-\ttristate \"SuperH HSPI controller\"\n--\ndrivers/spi/Kconfig-1053-\ndrivers/spi/Kconfig:1054:config SPI_SIFIVE\ndrivers/spi/Kconfig-1055-\ttristate \"SiFive SPI controller\"\n--\ndrivers/spi/Kconfig-1059-\ndrivers/spi/Kconfig:1060:config SPI_SLAVE_MT27XX\ndrivers/spi/Kconfig-1061-\ttristate \"MediaTek SPI slave device\"\n--\ndrivers/spi/Kconfig-1069-\ndrivers/spi/Kconfig:1070:config SPI_SN_F_OSPI\ndrivers/spi/Kconfig-1071-\ttristate \"Socionext F_OSPI SPI flash controller\"\n--\ndrivers/spi/Kconfig-1078-\ndrivers/spi/Kconfig:1079:config SPI_SG2044_NOR\n\n"
}

gemini-3.1-pro-preview

null

null

							input: 52166
							output: 30
							thoughts: 23
						

Here's a summary of my immediate thought process, keeping in mind my expertise:

**Checking for Key Test Configurations**

Okay, so I'm diving in. My first instinct, given the context, is to immediately check the configuration for specific setups. I'm looking for two primary indicators: `SPI_MOCKUP` and `SPI_LOOPBACK_TEST`. These are the flags I'd expect to see to denote the presence of a mock-up SPI implementation, or a loopback testing configuration. I need to understand whether we are simulating the SPI bus, or if we are exercising a full, closed-loop interaction within our system. Grasping this is the lynchpin to making any sense of the next stage of investigation. The presence or absence of either of these, shapes the whole next level of inquiry. It's the most basic question that needs to be answered.

no matches

{
  "Expression": "config SPI_MOCKUP",
  "PathPrefix": "drivers/spi/"
}

{
  "error": "no matches"
}

gemini-3.1-pro-preview

null

null

							input: 52419
							output: 31
							thoughts: 12
						

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

**Considering SPI Loopback Testing**

Alright, let's see... the topic at hand is evaluating the SPI interface, and my immediate thought is to consider a good old loopback test. The very mention sparks the question: "What about the `config SPI_LOOPBACK_TEST` option?" It’s a pretty standard approach, so I immediately think of the implications for our specific scenario. Is it available in this configuration? Does it provide the level of diagnostic detail we require, or are we aiming for something more nuanced? The inherent simplicity is appealing for a quick baseline check, but does it offer sufficient coverage given the potential complexity of the interactions we are investigating? Or, maybe it doesn’t even exist in this setup, meaning we need to delve into something more involved. The questions, and the considerations, begin.

{
  "Expression": "config SPI_LOOPBACK_TEST",
  "PathPrefix": "drivers/spi/"
}

{
  "Output": "drivers/spi/Kconfig=1358=config SPI_SPIDEV\n--\ndrivers/spi/Kconfig-1362-\ndrivers/spi/Kconfig:1363:config SPI_LOOPBACK_TEST\ndrivers/spi/Kconfig-1364-\ttristate \"spi loopback test framework support\"\n"
}

gemini-3.1-pro-preview

null

null

							input: 52740
							output: 27
							thoughts: 68
						

**Exploring SPI Device Instantiation**

Okay, so I'm trying to figure out a clever way to instantiate an SPI device, perhaps using something like `spi-loopback-test`. But wait, that doesn't seem right. `spi-loopback-test` is just a *driver* designed to hook up to and then verify the functionality of an existing SPI device. It's not a tool for creating one. So scratch that idea.

Alright, what if there's a virtual SPI controller I can leverage? That's the next logical thought. Time to dive into the kernel config... I should probably search for something like `config SPI_VIRTUAL` or a similar configuration option. Let's see what's out there.

{
  "Expression": "config SPI_",
  "PathPrefix": "drivers/spi/"
}

{
  "Output": "\nFull output is too long, showing 500 out of 660 lines.\nUse more precise expression if possible.\n\ndrivers/spi/Kconfig=26=if SPI\ndrivers/spi/Kconfig-27-\ndrivers/spi/Kconfig:28:config SPI_DEBUG\ndrivers/spi/Kconfig-29-\tbool \"Debug support for SPI drivers\"\n--\ndrivers/spi/Kconfig-38-\ndrivers/spi/Kconfig:39:config SPI_MASTER\ndrivers/spi/Kconfig-40-#\tbool \"SPI Master Support\"\n--\ndrivers/spi/Kconfig=49=if SPI_MASTER\ndrivers/spi/Kconfig-50-\ndrivers/spi/Kconfig:51:config SPI_MEM\ndrivers/spi/Kconfig-52-\tbool \"SPI memory extension\"\n--\ndrivers/spi/Kconfig-57-\ndrivers/spi/Kconfig:58:config SPI_OFFLOAD\ndrivers/spi/Kconfig-59-\tbool\n--\ndrivers/spi/Kconfig=61=comment \"SPI Master Controller Drivers\"\ndrivers/spi/Kconfig-62-\ndrivers/spi/Kconfig:63:config SPI_AIROHA_SNFI\ndrivers/spi/Kconfig-64-\ttristate \"Airoha SPI NAND Flash Interface\"\n--\ndrivers/spi/Kconfig-72-\ndrivers/spi/Kconfig:73:config SPI_ALTERA\ndrivers/spi/Kconfig-74-\ttristate \"Altera SPI Controller platform driver\"\n--\ndrivers/spi/Kconfig-79-\ndrivers/spi/Kconfig:80:config SPI_ALTERA_CORE\ndrivers/spi/Kconfig-81-\ttristate \"Altera SPI Controller core code\" if COMPILE_TEST\n--\ndrivers/spi/Kconfig-85-\ndrivers/spi/Kconfig:86:config SPI_ALTERA_DFL\ndrivers/spi/Kconfig-87-\ttristate \"DFL bus driver for Altera SPI Controller\"\n--\ndrivers/spi/Kconfig-94-\ndrivers/spi/Kconfig:95:config SPI_AMLOGIC_SPIFC_A1\ndrivers/spi/Kconfig-96-\ttristate \"Amlogic A1 SPIFC controller\"\n--\ndrivers/spi/Kconfig-101-\ndrivers/spi/Kconfig:102:config SPI_AMLOGIC_SPIFC_A4\ndrivers/spi/Kconfig-103-\ttristate \"Amlogic A4 SPI Flash controller\"\n--\ndrivers/spi/Kconfig-111-\ndrivers/spi/Kconfig:112:config SPI_AMLOGIC_SPISG\ndrivers/spi/Kconfig-113-\ttristate \"Amlogic SPISG controller\"\n--\ndrivers/spi/Kconfig-120-\ndrivers/spi/Kconfig:121:config SPI_APPLE\ndrivers/spi/Kconfig-122-\ttristate \"Apple SoC SPI Controller platform driver\"\n--\ndrivers/spi/Kconfig-131-\ndrivers/spi/Kconfig:132:config SPI_AR934X\ndrivers/spi/Kconfig-133-\ttristate \"Qualcomm Atheros AR934X/QCA95XX SPI controller driver\"\n--\ndrivers/spi/Kconfig-138-\ndrivers/spi/Kconfig:139:config SPI_ATCSPI200\ndrivers/spi/Kconfig-140-\ttristate \"Andes ATCSPI200 SPI controller\"\n--\ndrivers/spi/Kconfig-147-\ndrivers/spi/Kconfig:148:config SPI_ATH79\ndrivers/spi/Kconfig-149-\ttristate \"Atheros AR71XX/AR724X/AR913X SPI controller driver\"\n--\ndrivers/spi/Kconfig-155-\ndrivers/spi/Kconfig:156:config SPI_ARMADA_3700\ndrivers/spi/Kconfig-157-\ttristate \"Marvell Armada 3700 SPI Controller\"\n--\ndrivers/spi/Kconfig-162-\ndrivers/spi/Kconfig:163:config SPI_ASPEED_SMC\ndrivers/spi/Kconfig-164-\ttristate \"Aspeed flash controllers in SPI mode\"\n--\ndrivers/spi/Kconfig-173-\ndrivers/spi/Kconfig:174:config SPI_ATMEL\ndrivers/spi/Kconfig-175-\ttristate \"Atmel SPI Controller\"\n--\ndrivers/spi/Kconfig-181-\ndrivers/spi/Kconfig:182:config SPI_AT91_USART\ndrivers/spi/Kconfig-183-\ttristate \"Atmel USART Controller SPI driver\"\n--\ndrivers/spi/Kconfig-189-\ndrivers/spi/Kconfig:190:config SPI_ATMEL_QUADSPI\ndrivers/spi/Kconfig-191-\ttristate \"Atmel Quad SPI Controller\"\n--\ndrivers/spi/Kconfig-198-\ndrivers/spi/Kconfig:199:config SPI_AU1550\ndrivers/spi/Kconfig-200-\ttristate \"Au1550/Au1200/Au1300 SPI Controller\"\n--\ndrivers/spi/Kconfig-206-\ndrivers/spi/Kconfig:207:config SPI_AXI_SPI_ENGINE\ndrivers/spi/Kconfig-208-\ttristate \"Analog Devices AXI SPI Engine controller\"\n--\ndrivers/spi/Kconfig-215-\ndrivers/spi/Kconfig:216:config SPI_AXIADO\ndrivers/spi/Kconfig-217-\ttristate \"Axiado DB-H SPI controller\"\n--\ndrivers/spi/Kconfig-226-\ndrivers/spi/Kconfig:227:config SPI_BCM2835\ndrivers/spi/Kconfig-228-\ttristate \"BCM2835 SPI controller\"\n--\ndrivers/spi/Kconfig-238-\ndrivers/spi/Kconfig:239:config SPI_BCM2835AUX\ndrivers/spi/Kconfig-240-\ttristate \"BCM2835 SPI auxiliary controller\"\n--\ndrivers/spi/Kconfig-248-\ndrivers/spi/Kconfig:249:config SPI_BCM63XX\ndrivers/spi/Kconfig-250-\ttristate \"Broadcom BCM63xx SPI controller\"\n--\ndrivers/spi/Kconfig-254-\ndrivers/spi/Kconfig:255:config SPI_BCM63XX_HSSPI\ndrivers/spi/Kconfig-256-\ttristate \"Broadcom BCM63XX HS SPI controller driver\"\n--\ndrivers/spi/Kconfig-261-\ndrivers/spi/Kconfig:262:config SPI_BCM_QSPI\ndrivers/spi/Kconfig-263-\ttristate \"Broadcom BSPI and MSPI controller support\"\n--\ndrivers/spi/Kconfig-272-\ndrivers/spi/Kconfig:273:config SPI_BCMBCA_HSSPI\ndrivers/spi/Kconfig-274-\ttristate \"Broadcom BCMBCA HS SPI controller driver\"\n--\ndrivers/spi/Kconfig-281-\ndrivers/spi/Kconfig:282:config SPI_BITBANG\ndrivers/spi/Kconfig-283-\ttristate \"Utilities for Bitbanging SPI host controllers\"\n--\ndrivers/spi/Kconfig-294-\ndrivers/spi/Kconfig:295:config SPI_BUTTERFLY\ndrivers/spi/Kconfig-296-\ttristate \"Parallel port adapter for AVR Butterfly (DEVELOPMENT)\"\n--\ndrivers/spi/Kconfig-304-\ndrivers/spi/Kconfig:305:config SPI_CADENCE\ndrivers/spi/Kconfig-306-\ttristate \"Cadence SPI controller\"\n--\ndrivers/spi/Kconfig-310-\ndrivers/spi/Kconfig:311:config SPI_CADENCE_QUADSPI\ndrivers/spi/Kconfig-312-\ttristate \"Cadence Quad SPI controller\"\n--\ndrivers/spi/Kconfig-321-\ndrivers/spi/Kconfig:322:config SPI_CADENCE_XSPI\ndrivers/spi/Kconfig-323-\ttristate \"Cadence XSPI controller\"\n--\ndrivers/spi/Kconfig-333-\ndrivers/spi/Kconfig:334:config SPI_CH341\ndrivers/spi/Kconfig-335-\ttristate \"CH341 USB2SPI adapter\"\n--\ndrivers/spi/Kconfig-339-\ndrivers/spi/Kconfig:340:config SPI_CLPS711X\ndrivers/spi/Kconfig-341-\ttristate \"CLPS711X host SPI controller\"\n--\ndrivers/spi/Kconfig-346-\ndrivers/spi/Kconfig:347:config SPI_COLDFIRE_QSPI\ndrivers/spi/Kconfig-348-\ttristate \"Freescale Coldfire QSPI controller\"\n--\ndrivers/spi/Kconfig-353-\ndrivers/spi/Kconfig:354:config SPI_CS42L43\ndrivers/spi/Kconfig-355-\ttristate \"Cirrus Logic CS42L43 SPI controller\"\n--\ndrivers/spi/Kconfig-361-\ndrivers/spi/Kconfig:362:config SPI_DAVINCI\ndrivers/spi/Kconfig-363-\ttristate \"Texas Instruments DaVinci/DA8x/OMAP-L/AM1x SoC SPI controller\"\n--\ndrivers/spi/Kconfig-368-\ndrivers/spi/Kconfig:369:config SPI_DESIGNWARE\ndrivers/spi/Kconfig-370-\ttristate \"DesignWare SPI controller core support\"\n--\ndrivers/spi/Kconfig=375=if SPI_DESIGNWARE\ndrivers/spi/Kconfig-376-\ndrivers/spi/Kconfig:377:config SPI_DW_DMA\ndrivers/spi/Kconfig-378-\tbool \"DMA support for DW SPI controller\"\ndrivers/spi/Kconfig-379-\ndrivers/spi/Kconfig:380:config SPI_DW_PCI\ndrivers/spi/Kconfig-381-\ttristate \"PCI interface driver for DW SPI core\"\n--\ndrivers/spi/Kconfig-383-\ndrivers/spi/Kconfig:384:config SPI_DW_MMIO\ndrivers/spi/Kconfig-385-\ttristate \"Memory-mapped io interface driver for DW SPI core\"\n--\ndrivers/spi/Kconfig=388=endif\ndrivers/spi/Kconfig-389-\ndrivers/spi/Kconfig:390:config SPI_DLN2\ndrivers/spi/Kconfig-391-       tristate \"Diolan DLN-2 USB SPI adapter\"\n--\ndrivers/spi/Kconfig-399-\ndrivers/spi/Kconfig:400:config SPI_EP93XX\ndrivers/spi/Kconfig-401-\ttristate \"Cirrus Logic EP93xx SPI controller\"\n--\ndrivers/spi/Kconfig-406-\ndrivers/spi/Kconfig:407:config SPI_FALCON\ndrivers/spi/Kconfig-408-\tbool \"Falcon SPI controller support\"\n--\ndrivers/spi/Kconfig-415-\ndrivers/spi/Kconfig:416:config SPI_FSI\ndrivers/spi/Kconfig-417-\ttristate \"FSI SPI driver\"\n--\ndrivers/spi/Kconfig-422-\ndrivers/spi/Kconfig:423:config SPI_FSL_LPSPI\ndrivers/spi/Kconfig-424-\ttristate \"Freescale i.MX LPSPI controller\"\n--\ndrivers/spi/Kconfig-428-\ndrivers/spi/Kconfig:429:config SPI_FSL_QUADSPI\ndrivers/spi/Kconfig-430-\ttristate \"Freescale QSPI controller\"\n--\ndrivers/spi/Kconfig-440-\ndrivers/spi/Kconfig:441:config SPI_GXP\ndrivers/spi/Kconfig-442-\ttristate \"GXP SPI driver\"\n--\ndrivers/spi/Kconfig-447-\ndrivers/spi/Kconfig:448:config SPI_HISI_KUNPENG\ndrivers/spi/Kconfig-449-\ttristate \"HiSilicon SPI Controller for Kunpeng SoCs\"\n--\ndrivers/spi/Kconfig-457-\ndrivers/spi/Kconfig:458:config SPI_HISI_SFC_V3XX\ndrivers/spi/Kconfig-459-\ttristate \"HiSilicon SPI NOR Flash Controller for Hi16XX chipsets\"\n--\ndrivers/spi/Kconfig-465-\ndrivers/spi/Kconfig:466:config SPI_NXP_FLEXSPI\ndrivers/spi/Kconfig-467-\ttristate \"NXP Flex SPI controller\"\n--\ndrivers/spi/Kconfig-476-\ndrivers/spi/Kconfig:477:config SPI_NXP_XSPI\ndrivers/spi/Kconfig-478-        tristate \"NXP xSPI controller\"\n--\ndrivers/spi/Kconfig-486-\ndrivers/spi/Kconfig:487:config SPI_GPIO\ndrivers/spi/Kconfig-488-\ttristate \"GPIO-based bitbanging SPI Master\"\n--\ndrivers/spi/Kconfig-502-\ndrivers/spi/Kconfig:503:config SPI_IMG_SPFI\ndrivers/spi/Kconfig-504-\ttristate \"IMG SPFI controller\"\n--\ndrivers/spi/Kconfig-509-\ndrivers/spi/Kconfig:510:config SPI_IMX\ndrivers/spi/Kconfig-511-\ttristate \"Freescale i.MX SPI controllers\"\n--\ndrivers/spi/Kconfig-515-\ndrivers/spi/Kconfig:516:config SPI_INGENIC\ndrivers/spi/Kconfig-517-\ttristate \"Ingenic SoCs SPI controller\"\n--\ndrivers/spi/Kconfig-524-\ndrivers/spi/Kconfig:525:config SPI_INTEL\ndrivers/spi/Kconfig-526-\ttristate\ndrivers/spi/Kconfig-527-\ndrivers/spi/Kconfig:528:config SPI_INTEL_PCI\ndrivers/spi/Kconfig-529-\ttristate \"Intel PCH/PCU SPI flash PCI driver\"\n--\ndrivers/spi/Kconfig-545-\ndrivers/spi/Kconfig:546:config SPI_INTEL_PLATFORM\ndrivers/spi/Kconfig-547-\ttristate \"Intel PCH/PCU SPI flash platform driver (DANGEROUS)\"\n--\ndrivers/spi/Kconfig-564-\ndrivers/spi/Kconfig:565:config SPI_JCORE\ndrivers/spi/Kconfig-566-\ttristate \"J-Core SPI Master\"\n--\ndrivers/spi/Kconfig-571-\ndrivers/spi/Kconfig:572:config SPI_KSPI2\ndrivers/spi/Kconfig-573-\ttristate \"Support for KEBA SPI master type 2 hardware\"\n--\ndrivers/spi/Kconfig-583-\ndrivers/spi/Kconfig:584:config SPI_LM70_LLP\ndrivers/spi/Kconfig-585-\ttristate \"Parallel port adapter for LM70 eval board (DEVELOPMENT)\"\n--\ndrivers/spi/Kconfig-592-\ndrivers/spi/Kconfig:593:config SPI_LOONGSON_CORE\ndrivers/spi/Kconfig-594-\ttristate\n--\ndrivers/spi/Kconfig-596-\ndrivers/spi/Kconfig:597:config SPI_LOONGSON_PCI\ndrivers/spi/Kconfig-598-\ttristate \"Loongson SPI Controller PCI Driver Support\"\n--\ndrivers/spi/Kconfig-607-\ndrivers/spi/Kconfig:608:config SPI_LOONGSON_PLATFORM\ndrivers/spi/Kconfig-609-\ttristate \"Loongson SPI Controller Platform Driver Support\"\n--\ndrivers/spi/Kconfig-618-\ndrivers/spi/Kconfig:619:config SPI_LP8841_RTC\ndrivers/spi/Kconfig-620-\ttristate \"ICP DAS LP-8841 SPI Controller for RTC\"\n--\ndrivers/spi/Kconfig-628-\ndrivers/spi/Kconfig:629:config SPI_MPC52xx\ndrivers/spi/Kconfig-630-\ttristate \"Freescale MPC52xx SPI (non-PSC) controller support\"\n--\ndrivers/spi/Kconfig-635-\ndrivers/spi/Kconfig:636:config SPI_MPC52xx_PSC\ndrivers/spi/Kconfig-637-\ttristate \"Freescale MPC52xx PSC SPI controller\"\n--\ndrivers/spi/Kconfig-642-\ndrivers/spi/Kconfig:643:config SPI_MPC512x_PSC\ndrivers/spi/Kconfig-644-\ttristate \"Freescale MPC512x PSC SPI controller\"\n--\ndrivers/spi/Kconfig-649-\ndrivers/spi/Kconfig:650:config SPI_FSL_LIB\ndrivers/spi/Kconfig-651-\ttristate\n--\ndrivers/spi/Kconfig-653-\ndrivers/spi/Kconfig:654:config SPI_FSL_CPM\ndrivers/spi/Kconfig-655-\ttristate\n--\ndrivers/spi/Kconfig-657-\ndrivers/spi/Kconfig:658:config SPI_FSL_SPI\ndrivers/spi/Kconfig-659-\ttristate \"Freescale SPI controller and Aeroflex Gaisler GRLIB SPI controller\"\n--\ndrivers/spi/Kconfig-669-\ndrivers/spi/Kconfig:670:config SPI_FSL_DSPI\ndrivers/spi/Kconfig-671-\ttristate \"Freescale DSPI controller\"\n--\ndrivers/spi/Kconfig-677-\ndrivers/spi/Kconfig:678:config SPI_FSL_ESPI\ndrivers/spi/Kconfig-679-\ttristate \"Freescale eSPI controller\"\n--\ndrivers/spi/Kconfig-685-\ndrivers/spi/Kconfig:686:config SPI_LJCA\ndrivers/spi/Kconfig-687-\ttristate \"Intel La Jolla Cove Adapter SPI support\"\n--\ndrivers/spi/Kconfig-696-\ndrivers/spi/Kconfig:697:config SPI_MESON_SPICC\ndrivers/spi/Kconfig-698-\ttristate \"Amlogic Meson SPICC controller\"\n--\ndrivers/spi/Kconfig-704-\ndrivers/spi/Kconfig:705:config SPI_MESON_SPIFC\ndrivers/spi/Kconfig-706-\ttristate \"Amlogic Meson SPIFC controller\"\n--\ndrivers/spi/Kconfig-712-\ndrivers/spi/Kconfig:713:config SPI_MICROCHIP_CORE_QSPI\ndrivers/spi/Kconfig-714-\ttristate \"Microchip FPGA QSPI controllers\"\n--\ndrivers/spi/Kconfig-721-\ndrivers/spi/Kconfig:722:config SPI_MICROCHIP_CORE_SPI\ndrivers/spi/Kconfig-723-\ttristate \"Microchip FPGA CoreSPI controller\"\n--\ndrivers/spi/Kconfig-730-\ndrivers/spi/Kconfig:731:config SPI_MT65XX\ndrivers/spi/Kconfig-732-\ttristate \"MediaTek SPI controller\"\n--\ndrivers/spi/Kconfig-739-\ndrivers/spi/Kconfig:740:config SPI_MT7621\ndrivers/spi/Kconfig-741-\ttristate \"MediaTek MT7621 SPI Controller\"\n--\ndrivers/spi/Kconfig-745-\ndrivers/spi/Kconfig:746:config SPI_MTK_NOR\ndrivers/spi/Kconfig-747-\ttristate \"MediaTek SPI NOR controller\"\n--\ndrivers/spi/Kconfig-755-\ndrivers/spi/Kconfig:756:config SPI_MTK_SNFI\ndrivers/spi/Kconfig-757-\ttristate \"MediaTek SPI NAND Flash Interface\"\n--\ndrivers/spi/Kconfig-765-\ndrivers/spi/Kconfig:766:config SPI_WPCM_FIU\ndrivers/spi/Kconfig-767-\ttristate \"Nuvoton WPCM450 Flash Interface Unit\"\n--\ndrivers/spi/Kconfig-776-\ndrivers/spi/Kconfig:777:config SPI_NPCM_FIU\ndrivers/spi/Kconfig-778-\ttristate \"Nuvoton NPCM FLASH Interface Unit\"\n--\ndrivers/spi/Kconfig-786-\ndrivers/spi/Kconfig:787:config SPI_NPCM_PSPI\ndrivers/spi/Kconfig-788-\ttristate \"Nuvoton NPCM PSPI Controller\"\n--\ndrivers/spi/Kconfig-793-\ndrivers/spi/Kconfig:794:config SPI_LANTIQ_SSC\ndrivers/spi/Kconfig-795-\ttristate \"Lantiq SSC SPI controller\"\n--\ndrivers/spi/Kconfig-801-\ndrivers/spi/Kconfig:802:config SPI_OC_TINY\ndrivers/spi/Kconfig-803-\ttristate \"OpenCores tiny SPI\"\n--\ndrivers/spi/Kconfig-808-\ndrivers/spi/Kconfig:809:config SPI_OCTEON\ndrivers/spi/Kconfig-810-\ttristate \"Cavium OCTEON SPI controller\"\n--\ndrivers/spi/Kconfig-815-\ndrivers/spi/Kconfig:816:config SPI_OMAP_UWIRE\ndrivers/spi/Kconfig-817-\ttristate \"OMAP1 MicroWire\"\n--\ndrivers/spi/Kconfig-822-\ndrivers/spi/Kconfig:823:config SPI_OMAP24XX\ndrivers/spi/Kconfig-824-\ttristate \"McSPI driver for OMAP\"\n--\ndrivers/spi/Kconfig-830-\ndrivers/spi/Kconfig:831:config SPI_TI_QSPI\ndrivers/spi/Kconfig-832-\ttristate \"DRA7xxx QSPI controller support\"\n--\ndrivers/spi/Kconfig-838-\ndrivers/spi/Kconfig:839:config SPI_ORION\ndrivers/spi/Kconfig-840-\ttristate \"Orion SPI master\"\n--\ndrivers/spi/Kconfig-845-\ndrivers/spi/Kconfig:846:config SPI_PCI1XXXX\ndrivers/spi/Kconfig-847-\ttristate \"PCI1XXXX SPI Bus support\"\n--\ndrivers/spi/Kconfig-854-\ndrivers/spi/Kconfig:855:config SPI_PIC32\ndrivers/spi/Kconfig-856-\ttristate \"Microchip PIC32 series SPI\"\n--\ndrivers/spi/Kconfig-860-\ndrivers/spi/Kconfig:861:config SPI_PIC32_SQI\ndrivers/spi/Kconfig-862-\ttristate \"Microchip PIC32 Quad SPI driver\"\n--\ndrivers/spi/Kconfig-866-\ndrivers/spi/Kconfig:867:config SPI_PL022\ndrivers/spi/Kconfig-868-\ttristate \"ARM AMBA PL022 SSP controller\"\n--\ndrivers/spi/Kconfig-877-\ndrivers/spi/Kconfig:878:config SPI_POLARFIRE_SOC\ndrivers/spi/Kconfig-879-\ttristate \"Microchip FPGA SPI controllers\"\n--\ndrivers/spi/Kconfig-887-\ndrivers/spi/Kconfig:888:config SPI_PPC4xx\ndrivers/spi/Kconfig-889-\ttristate \"PPC4xx SPI Controller\"\n--\ndrivers/spi/Kconfig-894-\ndrivers/spi/Kconfig:895:config SPI_PXA2XX\ndrivers/spi/Kconfig-896-\ttristate \"PXA2xx SSP SPI master\"\n--\ndrivers/spi/Kconfig-902-\ndrivers/spi/Kconfig:903:config SPI_PXA2XX_PCI\ndrivers/spi/Kconfig-904-\tdef_tristate SPI_PXA2XX \u0026\u0026 PCI \u0026\u0026 COMMON_CLK\ndrivers/spi/Kconfig-905-\ndrivers/spi/Kconfig:906:config SPI_REALTEK_SNAND\ndrivers/spi/Kconfig-907-\ttristate \"Realtek SPI-NAND Flash Controller\"\n--\ndrivers/spi/Kconfig-916-\ndrivers/spi/Kconfig:917:config SPI_ROCKCHIP\ndrivers/spi/Kconfig-918-\ttristate \"Rockchip SPI controller driver\"\n--\ndrivers/spi/Kconfig-928-\ndrivers/spi/Kconfig:929:config SPI_ROCKCHIP_SFC\ndrivers/spi/Kconfig-930-\ttristate \"Rockchip Serial Flash Controller (SFC)\"\n--\ndrivers/spi/Kconfig-940-\ndrivers/spi/Kconfig:941:config SPI_RB4XX\ndrivers/spi/Kconfig-942-\ttristate \"Mikrotik RB4XX SPI master\"\n--\ndrivers/spi/Kconfig-947-\ndrivers/spi/Kconfig:948:config SPI_RPCIF\ndrivers/spi/Kconfig-949-\ttristate \"Renesas RPC-IF SPI driver\"\n--\ndrivers/spi/Kconfig-953-\ndrivers/spi/Kconfig:954:config SPI_RSPI\ndrivers/spi/Kconfig-955-\ttristate \"Renesas RSPI/QSPI controller\"\n--\ndrivers/spi/Kconfig-959-\ndrivers/spi/Kconfig:960:config SPI_RZV2H_RSPI\ndrivers/spi/Kconfig-961-\ttristate \"Renesas RZ/V2H RSPI controller\"\n--\ndrivers/spi/Kconfig-967-\ndrivers/spi/Kconfig:968:config SPI_RZV2M_CSI\ndrivers/spi/Kconfig-969-\ttristate \"Renesas RZ/V2M CSI controller\"\n--\ndrivers/spi/Kconfig-974-\ndrivers/spi/Kconfig:975:config SPI_QCOM_QSPI\ndrivers/spi/Kconfig-976-\ttristate \"QTI QSPI controller\"\n--\ndrivers/spi/Kconfig-980-\ndrivers/spi/Kconfig:981:config SPI_QPIC_SNAND\ndrivers/spi/Kconfig-982-\ttristate \"QPIC SNAND controller\"\n--\ndrivers/spi/Kconfig-989-\ndrivers/spi/Kconfig:990:config SPI_QUP\ndrivers/spi/Kconfig-991-\ttristate \"Qualcomm SPI controller with QUP interface\"\n--\ndrivers/spi/Kconfig-1002-\ndrivers/spi/Kconfig:1003:config SPI_QCOM_GENI\ndrivers/spi/Kconfig-1004-\ttristate \"Qualcomm GENI based SPI controller\"\n--\ndrivers/spi/Kconfig-1014-\ndrivers/spi/Kconfig:1015:config SPI_S3C64XX\ndrivers/spi/Kconfig-1016-\ttristate \"Samsung S3C64XX/Exynos SoC series type SPI\"\n--\ndrivers/spi/Kconfig-1021-\ndrivers/spi/Kconfig:1022:config SPI_SC18IS602\ndrivers/spi/Kconfig-1023-\ttristate \"NXP SC18IS602/602B/603 I2C to SPI bridge\"\n--\ndrivers/spi/Kconfig-1027-\ndrivers/spi/Kconfig:1028:config SPI_SH_MSIOF\ndrivers/spi/Kconfig-1029-\ttristate \"SuperH MSIOF SPI controller\"\n--\ndrivers/spi/Kconfig-1034-\ndrivers/spi/Kconfig:1035:config SPI_SH\ndrivers/spi/Kconfig-1036-\ttristate \"SuperH SPI controller\"\n--\ndrivers/spi/Kconfig-1040-\ndrivers/spi/Kconfig:1041:config SPI_SH_SCI\ndrivers/spi/Kconfig-1042-\ttristate \"SuperH SCI SPI controller\"\n--\ndrivers/spi/Kconfig-1047-\ndrivers/spi/Kconfig:1048:config SPI_SH_HSPI\ndrivers/spi/Kconfig-1049-\ttristate \"SuperH HSPI controller\"\n--\ndrivers/spi/Kconfig-1053-\ndrivers/spi/Kconfig:1054:config SPI_SIFIVE\ndrivers/spi/Kconfig-1055-\ttristate \"SiFive SPI controller\"\n--\ndrivers/spi/Kconfig-1059-\ndrivers/spi/Kconfig:1060:config SPI_SLAVE_MT27XX\ndrivers/spi/Kconfig-1061-\ttristate \"MediaTek SPI slave device\"\n--\ndrivers/spi/Kconfig-1069-\ndrivers/spi/Kconfig:1070:config SPI_SN_F_OSPI\ndrivers/spi/Kconfig-1071-\ttristate \"Socionext F_OSPI SPI flash controller\"\n--\ndrivers/spi/Kconfig-1078-\ndrivers/spi/Kconfig:1079:config SPI_SG2044_NOR\n\n"
}

gemini-3.1-pro-preview

null

null

							input: 60478
							output: 26
							thoughts: 429
						

**My Assessment of the `lan865x` Driver and Syzkaller Integration**

Okay, so I'm tackling this `lan865x` driver, and my immediate concern is how to even *get* it probed within the syzkaller environment. I see two potential SPI implementations, `SPI_BITBANG` and `SPI_GPIO`, but that's not the core issue. The problem is that syzkaller doesn't have a built-in mechanism to instantiate arbitrary SPI devices, right? It's not like there's some kind of virtual SPI bus I can inject into.

Could netlink be the answer? No, that's definitely not how SPI drivers are handled. What about `syz_dev_init`? Nope, that's not a thing. Hmm, is there anything in `sys/linux/dev_spi.txt`? No, `spidev` is for userspace SPI interaction; I need the kernel driver to actually probe.

Alright, maybe via device tree? But syzkaller doesn't inject those either, so that's a dead end. Okay, let's think about sysfs. Could I use that to at least *try* to force the driver to load? Something like `echo lan8650 > /sys/bus/spi/devices/spi0.0/driver_override`? The catch, of course, is that `spi0.0` has to *already* exist.

This brings me to the fundamental question: Does the syzkaller QEMU environment even *have* an SPI controller, or any SPI devices connected to it? QEMU *might* have some, like `pl022` on ARM, but what about on x86? On x86, maybe there is nothing at all, maybe `lpc_ich`? And even if there's a controller, it's highly unlikely that it has a device connected to it unless it's been explicitly configured via ACPI or Device Tree.

So, realistically, `lan865x_probe` is never going to be called in the current setup. And if `lan865x_probe` isn't called, then `oa_tc6_init` is never called, which makes all that code in `oa_tc6.c` completely unreachable. I really need to double check that `oa_tc6_init` *can't* be called by some other means, though; can't take any assumptions here.

{
  "Expression": "oa_tc6_init",
  "PathPrefix": ""
}

{
  "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/microchip/lan865x/lan865x.c=333=static int lan865x_probe(struct spi_device *spi)\n--\ndrivers/net/ethernet/microchip/lan865x/lan865x.c-348-\ndrivers/net/ethernet/microchip/lan865x/lan865x.c:349:\tpriv-\u003etc6 = oa_tc6_init(spi, netdev);\ndrivers/net/ethernet/microchip/lan865x/lan865x.c-350-\tif (!priv-\u003etc6) {\n--\ndrivers/net/ethernet/oa_tc6.c=1294=EXPORT_SYMBOL_GPL(oa_tc6_start_xmit);\n--\ndrivers/net/ethernet/oa_tc6.c-1296-/**\ndrivers/net/ethernet/oa_tc6.c:1297: * oa_tc6_init - allocates and initializes oa_tc6 structure.\ndrivers/net/ethernet/oa_tc6.c-1298- * @spi: device with which data will be exchanged.\n--\ndrivers/net/ethernet/oa_tc6.c-1303- */\ndrivers/net/ethernet/oa_tc6.c:1304:struct oa_tc6 *oa_tc6_init(struct spi_device *spi, struct net_device *netdev)\ndrivers/net/ethernet/oa_tc6.c-1305-{\n--\ndrivers/net/ethernet/oa_tc6.c-1408-}\ndrivers/net/ethernet/oa_tc6.c:1409:EXPORT_SYMBOL_GPL(oa_tc6_init);\ndrivers/net/ethernet/oa_tc6.c-1410-\n--\ninclude/linux/oa_tc6.h=13=struct oa_tc6;\ninclude/linux/oa_tc6.h-14-\ninclude/linux/oa_tc6.h:15:struct oa_tc6 *oa_tc6_init(struct spi_device *spi, struct net_device *netdev);\ninclude/linux/oa_tc6.h-16-void oa_tc6_exit(struct oa_tc6 *tc6);\n"
}

gemini-3.1-pro-preview

null

null

							input: 62183
							output: 24
							thoughts: 125
						

**Investigating the `lan865x` SPI Driver**

Okay, so I'm focusing on a specific piece of code. It looks like this bit of logic is only used by the `lan865x` driver, which, as I recall, handles SPI communication. My main concern is whether this particular code path is actually reachable. How can I trigger it?

Hmm, I wonder if syzkaller, our fuzzer, has a syscall setup specifically for SPI. Let me quickly see if there's a `syz_spi_setup` or something similar. Unfortunately, I don't have direct access to the syzkaller source right now, but I can work around that. I'll check if the kernel has any mock or virtual SPI drivers that syzkaller might be leveraging. Let's see if a `spi-mockup.c` file exists. That'll give me a good indication of how syzkaller might interact with SPI devices in a simulated environment.

no matches

{
  "Expression": "spi-mockup",
  "PathPrefix": ""
}

{
  "error": "no matches"
}

gemini-3.1-pro-preview

null

null

							input: 62557
							output: 26
							thoughts: 14
						

Okay, here's my interpretation of that thought process, tailored for an expert audience, and written in the first person:

**Investigating SPI Loopback Testing**

Alright, let's dive into this. The mental checklist starts with a fundamental question: does a pre-existing "spi-loopback-test.c" file even *exist*? It's a key first step. Finding that would be a huge time-saver. If there's already a dedicated loopback test, the focus shifts to understanding its architecture, capabilities, and any potential modifications necessary to align with the current project's specific hardware and requirements. The ideal scenario is leveraging a well-tested, documented solution.

{
  "Expression": "spi-loopback-test",
  "PathPrefix": ""
}

{
  "Output": "Documentation/devicetree/bindings/incomplete-devices.yaml=26=properties:\n--\nDocumentation/devicetree/bindings/incomplete-devices.yaml-245-          - gpio-virtuser\nDocumentation/devicetree/bindings/incomplete-devices.yaml:246:          - linux,spi-loopback-test\nDocumentation/devicetree/bindings/incomplete-devices.yaml-247-          - mailbox-test\n--\ndrivers/spi/Makefile=14=obj-$(CONFIG_SPI_SPIDEV)\t\t+= spidev.o\ndrivers/spi/Makefile:15:obj-$(CONFIG_SPI_LOOPBACK_TEST)\t\t+= spi-loopback-test.o\ndrivers/spi/Makefile-16-\n--\ndrivers/spi/spi-loopback-test.c-2-/*\ndrivers/spi/spi-loopback-test.c:3: *  linux/drivers/spi/spi-loopback-test.c\ndrivers/spi/spi-loopback-test.c-4- *\n--\ndrivers/spi/spi-loopback-test.c=358=static int spi_loopback_test_probe(struct spi_device *spi)\n--\ndrivers/spi/spi-loopback-test.c-372-\ndrivers/spi/spi-loopback-test.c:373:\tdev_info(\u0026spi-\u003edev, \"Executing spi-loopback-tests\\n\");\ndrivers/spi/spi-loopback-test.c-374-\n--\ndrivers/spi/spi-loopback-test.c-376-\ndrivers/spi/spi-loopback-test.c:377:\tdev_info(\u0026spi-\u003edev, \"Finished spi-loopback-tests with return: %i\\n\",\ndrivers/spi/spi-loopback-test.c-378-\t\t ret);\n--\ndrivers/spi/spi-loopback-test.c=384=static struct of_device_id spi_loopback_test_of_match[] = {\ndrivers/spi/spi-loopback-test.c:385:\t{ .compatible\t= \"linux,spi-loopback-test\", },\ndrivers/spi/spi-loopback-test.c-386-\t{ }\n--\ndrivers/spi/spi-loopback-test.c=396=static struct spi_driver spi_loopback_test_driver = {\ndrivers/spi/spi-loopback-test.c-397-\t.driver = {\ndrivers/spi/spi-loopback-test.c:398:\t\t.name = \"spi-loopback-test\",\ndrivers/spi/spi-loopback-test.c-399-\t\t.of_match_table = spi_loopback_test_of_match,\n"
}

gemini-3.1-pro-preview

null

null

							input: 63416
							output: 23
							thoughts: 42
						

Okay, here's my interpretation of those thoughts, summarized from my perspective as someone familiar with SPI controllers and drivers:

**Considering SPI Test Strategies**

Alright, so `spi-loopback-test` is essentially a bare-bones driver designed purely for exercising the SPI controller itself. It doesn't incorporate any real-world device instantiation or interaction; it's a testbed, nothing more. My primary focus is understanding and testing the SPI controller and its associated driver, thus I would consider this a primary reference point to start, but I need other options as well.

The question then becomes, what are the alternatives? Are there other SPI drivers that might be useful here? Specifically, I'm thinking about `spi-virt` or `spi-dummy`. Those might provide a more controlled or simulated environment for testing, perhaps allowing me to isolate specific aspects of the SPI controller without needing actual hardware. I should also investigate whether those alternatives offer any different testing scenarios or features. They might also provide a reference to additional methods of testing or debugging.

no matches

{
  "Expression": "spi-dummy",
  "PathPrefix": ""
}

{
  "error": "no matches"
}

gemini-3.1-pro-preview

null

null

							input: 63711
							output: 23
							thoughts: 8
						

Okay, here's my interpretation of that thought process, tailored for an expert audience, and presented as if it were my own internal monologue:

**Considering `spi-virt` in the Context of [Implied Context - User can infer the context from the prompt]**

Hmm, so we're looking at [implied context, e.g., virtualizing SPI devices, exploring alternatives to a specific solution, etc.]. The first thing that pops into my head is, what about `spi-virt`? It's been around for a bit, and depending on the specific application, it might offer a good solution. The obvious advantages are [User will know this immediately - e.g., potential performance characteristics, existing integration, specific features]. I need to quickly recall the trade-offs - perhaps the limitations in [e.g., specific hardware support, resource overhead] compared to other approaches. I should be aware of any security implications, particularly if the application is safety-critical. Ultimately, whether this is even the right path depends heavily on the specific requirements, especially [Implied constraints user can infer]. So, `spi-virt`... potential candidate, but I need to quickly assess it against the core problem.

{
  "Expression": "spi-virt",
  "PathPrefix": ""
}

{
  "Output": "MAINTAINERS=28480=S:\tMaintained\nMAINTAINERS:28481:F:\tdrivers/spi/spi-virtio.c\nMAINTAINERS-28482-F:\tinclude/uapi/linux/virtio_spi.h\n--\ndrivers/spi/Kconfig=1261=config SPI_VIRTIO\n--\ndrivers/spi/Kconfig-1269-\t  This driver can also be built as a module. If so, the module\ndrivers/spi/Kconfig:1270:\t  will be called spi-virtio.\ndrivers/spi/Kconfig-1271-\n--\ndrivers/spi/Makefile=165=obj-$(CONFIG_SPI_UNIPHIER)\t\t+= spi-uniphier.o\ndrivers/spi/Makefile:166:obj-$(CONFIG_SPI_VIRTIO)\t\t+= spi-virtio.o\ndrivers/spi/Makefile-167-obj-$(CONFIG_SPI_XCOMM)\t\t+= spi-xcomm.o\n"
}

gemini-3.1-pro-preview

null

null

							input: 64258
							output: 27
							thoughts: 271
						

**My Assessment of virtio-spi and Syzkaller's Interaction**

Okay, so I'm looking at `spi-virtio.c`. The immediate thought is, "If QEMU is running with a virtio-spi device, could syzkaller leverage it for fuzzing?" That's the core question here. My initial understanding is that virtio-spi presents a virtual SPI controller *to* the guest. Then, the guest would *itself* be responsible for managing and accessing devices connected to that SPI controller. My brain goes directly to the question of *how* those devices are defined. Usually, QEMU defines the connected SPI devices through the device tree or ACPI configuration.

Now, does syzkaller's QEMU setup include an explicit device like a `lan865x` connected to `virtio-spi`? I'm almost certain that syzkaller generally uses a fairly generic QEMU configuration; it's designed to be versatile, so it probably doesn't have such specific, device-dependent details baked in. Unless someone manually added it to a syzkaller command or device tree overlay, it's highly unlikely.

Hmm... does syzkaller allow for injecting device tree nodes? I'd have to double-check, but I don't believe so. That would be a significant feature, and I'd remember if it existed.

So, how else could an SPI device get instantiated? The most common method would be via `spi_new_device` being called internally by another driver or, possibly, through a sysfs interface. But... wait, there's no sysfs interface for arbitrary SPI device creation, is there? I know I2C has that convenient `new_device` attribute in sysfs. Does SPI have an equivalent? I need to verify that right now. Time to dig in and check.

{
  "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-119-\t\tfor (i = 0; i \u003c pdata-\u003enum_devices; i++) {\ndrivers/spi/spi-altera-platform.c:120:\t\t\tif (!spi_new_device(host, pdata-\u003edevices + i))\ndrivers/spi/spi-altera-platform.c-121-\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=313=static int cs42l43_spi_probe(struct platform_device *pdev)\n--\ndrivers/spi/spi-cs42l43.c-427-\ndrivers/spi/spi-cs42l43.c:428:\t\tif (!spi_new_device(priv-\u003ectlr, ampl_info))\ndrivers/spi/spi-cs42l43.c-429-\t\t\treturn dev_err_probe(priv-\u003edev, -ENODEV,\n--\ndrivers/spi/spi-cs42l43.c-431-\ndrivers/spi/spi-cs42l43.c:432:\t\tif (!spi_new_device(priv-\u003ectlr, ampr_info))\ndrivers/spi/spi-cs42l43.c-433-\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=788=EXPORT_SYMBOL_GPL(spi_add_device);\n--\ndrivers/spi/spi.c-790-/**\ndrivers/spi/spi.c:791: * spi_new_device - instantiate one new SPI device\ndrivers/spi/spi.c-792- * @ctlr: Controller to which device is connected\n--\ndrivers/spi/spi.c-803- */\ndrivers/spi/spi.c:804:struct spi_device *spi_new_device(struct spi_controller *ctlr,\ndrivers/spi/spi.c-805-\t\t\t\t  struct spi_board_info *chip)\n--\ndrivers/spi/spi.c-859-}\ndrivers/spi/spi.c:860:EXPORT_SYMBOL_GPL(spi_new_device);\ndrivers/spi/spi.c-861-\n--\ndrivers/spi/spi.c=890=static void spi_match_controller_to_boardinfo(struct spi_controller *ctlr,\n--\ndrivers/spi/spi.c-897-\ndrivers/spi/spi.c:898:\tdev = spi_new_device(ctlr, bi);\ndrivers/spi/spi.c-899-\tif (!dev)\n"
}

gemini-3.1-pro-preview

null

null

							input: 66732
							output: 40
							thoughts: 162
						

**My SPI Device Instantiation Journey**

Okay, so I'm trying to figure out how to programmatically create an SPI device, and it's looking like `sysfs` isn't the direct path like it is with I2C. Hmm, let me think... didn't I see something in syzkaller about SPI device setup? Maybe there's a `syz_spi_setup` or something similar? Gotta check that. I need to figure out how to get syzkaller to actually instantiate an SPI device.

Right, let me just search the kernel source for something, like if anyone tests SPI drivers. I'll search for something specific, like `lan865x`. Nothing pops up... Wait a second... syzkaller *does* have a `syz_usb_connect` function. Now, can that somehow be leveraged?

Eureka! Is there a USB to SPI bridge device that syzkaller can instantiate with `syz_usb_connect`? Let's see... *yes!* I recall now... `spi-ch341.c` is exactly that. Now, let's go poke around in `spi-ch341.c` and see how this is done and if this can work for my testing.

{
  "File": "drivers/spi/spi-ch341.c",
  "FirstLine": 190,
  "LineCount": 50
}

{
  "Contents": " 190:\t\tctrl-\u003eset_cs = ch341_set_cs;\n 191:\t\tctrl-\u003eauto_runtime_pm = false;\n 192:\t\n 193:\t\tusb_set_intfdata(intf, ch341);\n 194:\t\n 195:\t\tret = ch341_config_stream(ch341);\n 196:\t\tif (ret)\n 197:\t\t\tgoto err_kill_urb;\n 198:\t\n 199:\t\tret = ch341_enable_pins(ch341, true);\n 200:\t\tif (ret)\n 201:\t\t\tgoto err_kill_urb;\n 202:\t\n 203:\t\tret = spi_register_controller(ctrl);\n 204:\t\tif (ret)\n 205:\t\t\tgoto err_disable_pins;\n 206:\t\n 207:\t\tch341-\u003espidev = spi_new_device(ctrl, \u0026chip);\n 208:\t\tif (!ch341-\u003espidev) {\n 209:\t\t\tret = -ENOMEM;\n 210:\t\t\tgoto err_unregister;\n 211:\t\t}\n 212:\t\n 213:\t\treturn 0;\n 214:\t\n 215:\terr_unregister:\n 216:\t\tspi_unregister_controller(ctrl);\n 217:\terr_disable_pins:\n 218:\t\tch341_enable_pins(ch341, false);\n 219:\terr_kill_urb:\n 220:\t\tusb_kill_urb(ch341-\u003erx_urb);\n 221:\terr_free_urb:\n 222:\t\tusb_free_urb(ch341-\u003erx_urb);\n 223:\t\n 224:\t\treturn ret;\n 225:\t}\n 226:\t\n 227:\tstatic void ch341_disconnect(struct usb_interface *intf)\n 228:\t{\n 229:\t\tstruct ch341_spi_dev *ch341 = usb_get_intfdata(intf);\n 230:\t\n 231:\t\tspi_unregister_device(ch341-\u003espidev);\n 232:\t\tspi_unregister_controller(ch341-\u003ectrl);\n 233:\t\tch341_enable_pins(ch341, false);\n 234:\t\tusb_kill_urb(ch341-\u003erx_urb);\n 235:\t\tusb_free_urb(ch341-\u003erx_urb);\n 236:\t}\n 237:\t\n 238:\tstatic const struct usb_device_id ch341_id_table[] = {\n 239:\t\t{ USB_DEVICE(0x1a86, 0x5512) },\n"
}

gemini-3.1-pro-preview

null

null

							input: 67969
							output: 40
							thoughts: 46
						

Okay, here's my interpretation of that thought process, from an expert's perspective:

**Diving into the `spi-ch341.c` Instantiation**

Right, so I'm looking at the `spi-ch341.c` driver, specifically at the device instantiation. It looks like it's creating a new SPI device, using `spi_new_device()`.  The core of this is the line: `ch341->spidev = spi_new_device(ctrl, &chip);`. That's where the magic happens, right? I immediately need to understand what this `chip` variable actually represents. Is it a static definition, a dynamic structure, or a pointer to a config? Contextually, it's being passed as a pointer, so I assume it's some sort of SPI chip definition, probably specific to the CH341. I need to dig into the definition of `chip` to determine how the driver knows the characteristics of the attached CH341. That's the critical piece for a successful instantiation. This is where the actual configuration data lives.

{
  "File": "drivers/spi/spi-ch341.c",
  "FirstLine": 130,
  "LineCount": 50
}

{
  "Contents": " 130:\t\tch341-\u003etx_buf[2] = CH341A_CMD_UIO_STM_DIR | (enable ? 0x3f : 0x00);\n 131:\t\tch341-\u003etx_buf[3] = CH341A_CMD_UIO_STM_END;\n 132:\t\n 133:\t\treturn usb_bulk_msg(ch341-\u003eudev, ch341-\u003ewrite_pipe, ch341-\u003etx_buf, 4,\n 134:\t\t\t\t    NULL, CH341_DEFAULT_TIMEOUT);\n 135:\t}\n 136:\t\n 137:\tstatic struct spi_board_info chip = {\n 138:\t\t.modalias = \"spi-ch341a\",\n 139:\t};\n 140:\t\n 141:\tstatic int ch341_probe(struct usb_interface *intf,\n 142:\t\t\t       const struct usb_device_id *id)\n 143:\t{\n 144:\t\tstruct usb_device *udev = interface_to_usbdev(intf);\n 145:\t\tstruct usb_endpoint_descriptor *in, *out;\n 146:\t\tstruct ch341_spi_dev *ch341;\n 147:\t\tstruct spi_controller *ctrl;\n 148:\t\tint ret;\n 149:\t\n 150:\t\tret = usb_find_common_endpoints(intf-\u003ecur_altsetting, \u0026in, \u0026out, NULL,\n 151:\t\t\t\t\t\tNULL);\n 152:\t\tif (ret)\n 153:\t\t\treturn ret;\n 154:\t\n 155:\t\tctrl = devm_spi_alloc_host(\u0026intf-\u003edev, sizeof(struct ch341_spi_dev));\n 156:\t\tif (!ctrl)\n 157:\t\t\treturn -ENOMEM;\n 158:\t\n 159:\t\tch341 = spi_controller_get_devdata(ctrl);\n 160:\t\tch341-\u003ectrl = ctrl;\n 161:\t\tch341-\u003eudev = udev;\n 162:\t\tch341-\u003ewrite_pipe = usb_sndbulkpipe(udev, usb_endpoint_num(out));\n 163:\t\tch341-\u003eread_pipe = usb_rcvbulkpipe(udev, usb_endpoint_num(in));\n 164:\t\n 165:\t\tch341-\u003erx_len = usb_endpoint_maxp(in);\n 166:\t\tch341-\u003erx_buf = devm_kzalloc(\u0026intf-\u003edev, ch341-\u003erx_len, GFP_KERNEL);\n 167:\t\tif (!ch341-\u003erx_buf)\n 168:\t\t\treturn -ENOMEM;\n 169:\t\n 170:\t\tch341-\u003erx_urb = usb_alloc_urb(0, GFP_KERNEL);\n 171:\t\tif (!ch341-\u003erx_urb)\n 172:\t\t\treturn -ENOMEM;\n 173:\t\n 174:\t\tch341-\u003etx_buf = devm_kzalloc(\u0026intf-\u003edev, CH341_PACKET_LENGTH, GFP_KERNEL);\n 175:\t\tif (!ch341-\u003etx_buf) {\n 176:\t\t\tret = -ENOMEM;\n 177:\t\t\tgoto err_free_urb;\n 178:\t\t}\n 179:\t\n"
}

gemini-3.1-pro-preview

null

null

							input: 69208
							output: 39
							thoughts: 44
						

Okay, here's my take on those thoughts, framed as an expert's internal monologue:

**Investigating SPI Bridge Selection**

Right, so the system has clearly opted for `spi-ch341a`. That's the driver that's been brought into play. Interesting, no sign of `lan865x` though. I wonder if there are any other USB-to-SPI bridges in the system that might be in play. I need to make sure I'm getting the complete picture here, so I need to check other possibilities. The `spi-dln2.c` driver springs to mind. Have I missed anything? I will check on this to ensure all the bases are covered.

{
  "File": "drivers/spi/spi-dln2.c",
  "FirstLine": 750,
  "LineCount": 50
}

{
  "Contents": " 750:\t\t\treturn ret;\n 751:\t\t}\n 752:\t\n 753:\t\tpm_runtime_set_autosuspend_delay(\u0026pdev-\u003edev,\n 754:\t\t\t\t\t\t DLN2_RPM_AUTOSUSPEND_TIMEOUT);\n 755:\t\tpm_runtime_use_autosuspend(\u0026pdev-\u003edev);\n 756:\t\tpm_runtime_set_active(\u0026pdev-\u003edev);\n 757:\t\tpm_runtime_enable(\u0026pdev-\u003edev);\n 758:\t\n 759:\t\tret = spi_register_controller(host);\n 760:\t\tif (ret \u003c 0) {\n 761:\t\t\tdev_err(\u0026pdev-\u003edev, \"Failed to register host\\n\");\n 762:\t\t\tgoto exit_register;\n 763:\t\t}\n 764:\t\n 765:\t\treturn ret;\n 766:\t\n 767:\texit_register:\n 768:\t\tpm_runtime_disable(\u0026pdev-\u003edev);\n 769:\t\tpm_runtime_set_suspended(\u0026pdev-\u003edev);\n 770:\t\n 771:\t\tif (dln2_spi_enable(dln2, false) \u003c 0)\n 772:\t\t\tdev_err(\u0026pdev-\u003edev, \"Failed to disable SPI module\\n\");\n 773:\t\n 774:\t\treturn ret;\n 775:\t}\n 776:\t\n 777:\tstatic void dln2_spi_remove(struct platform_device *pdev)\n 778:\t{\n 779:\t\tstruct spi_controller *host = platform_get_drvdata(pdev);\n 780:\t\tstruct dln2_spi *dln2 = spi_controller_get_devdata(host);\n 781:\t\n 782:\t\tspi_unregister_controller(host);\n 783:\t\n 784:\t\tpm_runtime_disable(\u0026pdev-\u003edev);\n 785:\t\n 786:\t\tif (dln2_spi_enable(dln2, false) \u003c 0)\n 787:\t\t\tdev_err(\u0026pdev-\u003edev, \"Failed to disable SPI module\\n\");\n 788:\t}\n 789:\t\n 790:\t#ifdef CONFIG_PM_SLEEP\n 791:\tstatic int dln2_spi_suspend(struct device *dev)\n 792:\t{\n 793:\t\tint ret;\n 794:\t\tstruct spi_controller *host = dev_get_drvdata(dev);\n 795:\t\tstruct dln2_spi *dln2 = spi_controller_get_devdata(host);\n 796:\t\n 797:\t\tret = spi_controller_suspend(host);\n 798:\t\tif (ret \u003c 0)\n 799:\t\t\treturn ret;\n"
}

gemini-3.1-pro-preview

null

null

							input: 70196
							output: 24
							thoughts: 438
						

**Analyzing the Reachability of `lan865x` in a Fuzzing Context**

Okay, so I'm trying to figure out if syzkaller can even reach the code for the `lan865x` driver, and if it's worth the effort. My first thought is just that the host is registered. But I need a way to instantiate an SPI device from userspace. Can syzkaller do that? Is there a way? I know I've seen `spi_new_device` used via sysfs... but wait, I just checked, and the drivers/spi/ directory doesn't have a sysfs attribute for `new_device`. Hmm, what about an ioctl in `spidev`? No, that just lets userspace talk *to* an existing device. Is there another way?

Perhaps `lan865x` is just unreachable in syzkaller. Then again, I wonder if syzkaller can inject device tree nodes? No, it doesn't have a generic device tree injector. ACPI injection? Nope, nothing dynamically there either. Wait... did they recently add something like `syz_dev_init`? Nope, not that I'm aware of. But, if `lan865x` is compiled and reachable, then syzkaller *can* fuzz it. The main question remains: is it reachable?

I should see if there is any other way `lan865x` could be instantiated. Right, it's an SPI driver, so if there's no instantiation method, then it's unreachable. But wait, what if it's a netdev driver? Yes, it is! But it's an SPI device driver that registers a netdev. If the SPI device is never probed, the netdev isn't registered. If the netdev isn't registered, then the code I'm interested in, in `oa_tc6.c`, never gets executed. So, are we saying `WorthFuzzing=false`?

I need to double-check. I recall some recent SPI fuzzing support being added to syzkaller, like in 2023 or 2024. Let's search for `syz_spi` and see what comes up. That should give me a definitive answer, one way or another.

no matches

{
  "Expression": "syz_spi",
  "PathPrefix": ""
}

{
  "error": "no matches"
}

gemini-3.1-pro-preview

null

null

							input: 71171
							output: 51
							thoughts: 182
						

**SPI Driver Fuzzing Quandary**

Okay, so I'm trying to figure out the best way to fuzz the `lan865x` SPI driver. My initial thought was to use something like `vhci` for SPI, similar to how we simulate virtual hardware for other buses, but that won't work. Darn. Is there an analogous `mac80211_hwsim` for SPI? Nope, nothing like that exists.

Alright, a different approach then. I remember syzkaller can fuzz SPI drivers, if the target driver is instantiated. The key is instantiation, so are there any SPI devices instantiated in the default syzkaller QEMU environment? Probably not. We're using `qemu-system-x86_64` with `pc` or `q35` machine types, which means no `lan865x` SPI devices present. Unless it's a specific board, which it isn't.

Shoot, this is trickier than I thought. Hold on, could I somehow get the `lan865x` device instantiated through PCI? No, that's not how it works. It's an SPI device. Or USB? No, that's a dead end too. Are there any other buses that could work? Maybe, let's take a closer look at the `lan865x_driver` source code.

{
  "File": "drivers/net/ethernet/microchip/lan865x/lan865x.c",
  "FirstLine": 430,
  "LineCount": 30
}

{
  "Contents": " 430:\t\t{ .name = \"lan8651\" },\n 431:\t\t{},\n 432:\t};\n 433:\tMODULE_DEVICE_TABLE(spi, lan865x_ids);\n 434:\t\n 435:\tstatic const struct of_device_id lan865x_dt_ids[] = {\n 436:\t\t{ .compatible = \"microchip,lan8650\" },\n 437:\t\t{ .compatible = \"microchip,lan8651\" },\n 438:\t\t{ /* Sentinel */ }\n 439:\t};\n 440:\tMODULE_DEVICE_TABLE(of, lan865x_dt_ids);\n 441:\t\n 442:\tstatic struct spi_driver lan865x_driver = {\n 443:\t\t.driver = {\n 444:\t\t\t.name = DRV_NAME,\n 445:\t\t\t.of_match_table = lan865x_dt_ids,\n 446:\t\t },\n 447:\t\t.probe = lan865x_probe,\n 448:\t\t.remove = lan865x_remove,\n 449:\t\t.id_table = lan865x_ids,\n 450:\t};\n 451:\tmodule_spi_driver(lan865x_driver);\n 452:\t\n 453:\tMODULE_DESCRIPTION(DRV_NAME \" 10Base-T1S MACPHY Ethernet Driver\");\n 454:\tMODULE_AUTHOR(\"Parthiban Veerasooran \u003cparthiban.veerasooran@microchip.com\u003e\");\n 455:\tMODULE_LICENSE(\"GPL\");\n"
}

gemini-3.1-pro-preview

null

null

							input: 72151
							output: 30
							thoughts: 121
						

**Investigating Dynamic SPI Device Instantiation**

Okay, so I'm looking at an SPI driver here. The immediate question in my mind is, "Can I instantiate an SPI device dynamically in Linux?" I know I *can* do it from kernel code using `spi_board_info` and `spi_new_device()`, that's straightforward enough. But, the more interesting question is: "Is there any *userspace* interface for doing this?"

My memory is nudging me – I seem to recall that I2C provides a nice userspace mechanism with `/sys/bus/i2c/devices/i2c-0/new_device`. That's really handy. So, the follow up question then is, "Does SPI have a similar construct?" It's definitely worth checking.

I'll dig into the kernel source to see if there's anything analogous. Let's see if the `drivers/spi/spi.c` file holds any clues, specifically looking for any indication of a `new_device` interface. That's the most logical place to start. Let's see what that file reveals...

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

{
  "Output": "drivers/spi/spi.c=788=EXPORT_SYMBOL_GPL(spi_add_device);\n--\ndrivers/spi/spi.c-790-/**\ndrivers/spi/spi.c:791: * spi_new_device - instantiate one new SPI device\ndrivers/spi/spi.c-792- * @ctlr: Controller to which device is connected\n--\ndrivers/spi/spi.c-803- */\ndrivers/spi/spi.c:804:struct spi_device *spi_new_device(struct spi_controller *ctlr,\ndrivers/spi/spi.c-805-\t\t\t\t  struct spi_board_info *chip)\n--\ndrivers/spi/spi.c-859-}\ndrivers/spi/spi.c:860:EXPORT_SYMBOL_GPL(spi_new_device);\ndrivers/spi/spi.c-861-\n--\ndrivers/spi/spi.c=890=static void spi_match_controller_to_boardinfo(struct spi_controller *ctlr,\n--\ndrivers/spi/spi.c-897-\ndrivers/spi/spi.c:898:\tdev = spi_new_device(ctlr, bi);\ndrivers/spi/spi.c-899-\tif (!dev)\n"
}

gemini-3.1-pro-preview

null

null

							input: 72870
							output: 28
							thoughts: 147
						

**My Line of Reasoning**

Okay, so I'm looking at how we can get a new SPI device defined, specifically thinking about sysfs for a `new_device` call, but that's a dead end. No luck there. Hmmm, what about `CONFIG_SPI_SLAVE`? Nope, that's not the path either. Alright, let's pivot to a different approach. Does `CONFIG_OF_DYNAMIC` offer any opportunities? Ah, wait a minute, the lightbulb is flickering – could we leverage configfs for loading device tree overlays? That's the key, yes, device tree overlays *can* be loaded through configfs!

Now, the next logical step is to see if syzkaller is already making use of configfs to load these overlays. Ideally, it's a generic and easily applied fuzzer. Unfortunately, it doesn't appear syzkaller has a broad fuzzer for device tree overlays at the moment. Which means drivers like `lan865x` and `oa_tc6` are effectively unreachable in syzkaller's current configuration. But hold on, before I definitively shut down the `oa_tc6` pathway, I should quickly check if it's being used by any *other* drivers.

{
  "Expression": "oa_tc6_init",
  "PathPrefix": "drivers/"
}

{
  "Output": "drivers/net/ethernet/microchip/lan865x/lan865x.c=333=static int lan865x_probe(struct spi_device *spi)\n--\ndrivers/net/ethernet/microchip/lan865x/lan865x.c-348-\ndrivers/net/ethernet/microchip/lan865x/lan865x.c:349:\tpriv-\u003etc6 = oa_tc6_init(spi, netdev);\ndrivers/net/ethernet/microchip/lan865x/lan865x.c-350-\tif (!priv-\u003etc6) {\n--\ndrivers/net/ethernet/oa_tc6.c=1294=EXPORT_SYMBOL_GPL(oa_tc6_start_xmit);\n--\ndrivers/net/ethernet/oa_tc6.c-1296-/**\ndrivers/net/ethernet/oa_tc6.c:1297: * oa_tc6_init - allocates and initializes oa_tc6 structure.\ndrivers/net/ethernet/oa_tc6.c-1298- * @spi: device with which data will be exchanged.\n--\ndrivers/net/ethernet/oa_tc6.c-1303- */\ndrivers/net/ethernet/oa_tc6.c:1304:struct oa_tc6 *oa_tc6_init(struct spi_device *spi, struct net_device *netdev)\ndrivers/net/ethernet/oa_tc6.c-1305-{\n--\ndrivers/net/ethernet/oa_tc6.c-1408-}\ndrivers/net/ethernet/oa_tc6.c:1409:EXPORT_SYMBOL_GPL(oa_tc6_init);\ndrivers/net/ethernet/oa_tc6.c-1410-\n"
}

gemini-3.1-pro-preview

null

null

							input: 73788
							output: 149
							thoughts: 1003
						

**Unreachable Code Analysis: `lan865x` SPI Driver**

Okay, so I'm looking at this patch and it's modifying code within the `oa_tc6` framework. My initial thought is, "Who uses this `oa_tc6` stuff?".  A quick check reveals it's exclusively used by the `lan865x` driver, which is an SPI device. That's a red flag. SPI devices in a standard virtualized QEMU setup aren't easily brought up from user space. There's no standard way to just magically instantiate them.

My mind immediately starts running through possible "escape hatches."  Could another driver instantiate `lan865x` indirectly? Nope. Syzkaller itself have some way to trigger SPI device instantiation? I scanned for any syz_* functions related to SPI, but came up empty. Could it use `spidev`? No luck. What about leveraging other device types like `mac80211_hwsim`, `vhci`, `uinput`, `vcan`, `tun`/`tap`, `netlink`, `configfs`, or `sysfs`?  No dice.  So, it seems we're stuck.

But wait, let me go through all of the platform devices, but no. Is `lan865x` a platform device? Nope, it's SPI. ACPI? Unless the QEMU ACPI tables are specifically configured, no. PCI? No. USB? Definitely not. The code's unreachable in these virtualized environments that syzkaller normally uses like GCE or QEMU.

I need to confirm this. I will mark this code as `WorthFuzzing=false`. The reasoning I'll provide is that the patch modifies the `oa_tc6` framework, which is tied to the `lan865x` SPI network driver. SPI devices require specific hardware instantiation (like via a Device Tree or ACPI) and can't be spun up dynamically from userspace in these standard virtualized environments, making them off-limits for the fuzzer.

Okay, just to be extra sure, let me double-check if there's any *other* way `oa_tc6` is employed.  A search for `oa_tc6_init` confirms that only `lan865x` uses it.  Is `lan865x` dependent on anything else? No.

Alright, let's zoom back in on the patch itself. It's touching functions like `oa_tc6_cleanup_waiting_tx_skb`, `oa_tc6_look_for_new_frame`, and a bunch of other `oa_tc6_prcs_*` and `oa_tc6_start_xmit` functions – all core to the `oa_tc6` framework. Since `oa_tc6` is solely used by `lan865x`, and `lan865x` is SPI, it reinforces my initial conclusion: unreachable.

Now, let me solidify the rationale for the report.

"The patch modifies the `oa_tc6` (OPEN Alliance 10BASE-T1x MAC-PHY Serial Interface) framework, which is currently only used by the `lan865x` SPI network driver. Since `lan865x` is an SPI device, it requires specific hardware instantiation (e.g., via Device Tree or ACPI) and cannot be dynamically instantiated from userspace in standard virtualized environments (like QEMU/GCE) used by syzkaller. Therefore, the modified code is unreachable for the fuzzer."

Just to dot all the i's and cross all the t's, is there any `lan865x` emulator in QEMU? No. Any `lan865x` mock in the kernel? No. Any `oa_tc6` mock in the kernel? No. Any general `spi` mock that could conjure arbitrary SPI devices? Nope.

I'm now confident. This code is unreachable.

{
  "EnableConfigs": [],
  "FocusSymbols": [],
  "Reasoning": "The patch modifies the `oa_tc6` (OPEN Alliance 10BASE-T1x MAC-PHY Serial Interface) framework, which is currently only used by the `lan865x` SPI network driver. Since `lan865x` is an SPI device, it requires specific hardware instantiation (e.g., via Device Tree or ACPI) and cannot be dynamically instantiated from userspace in standard virtualized environments (like QEMU/GCE) used by syzkaller. Therefore, the modified code is unreachable for the fuzzer.",
  "WorthFuzzing": false
}

{
  "EnableConfigs": null,
  "FocusSymbols": [],
  "Reasoning": "The patch modifies the `oa_tc6` (OPEN Alliance 10BASE-T1x MAC-PHY Serial Interface) framework, which is currently only used by the `lan865x` SPI network driver. Since `lan865x` is an SPI device, it requires specific hardware instantiation (e.g., via Device Tree or ACPI) and cannot be dynamically instantiated from userspace in standard virtualized environments (like QEMU/GCE) used by syzkaller. Therefore, the modified code is unreachable for the fuzzer.",
  "WorthFuzzing": false
}