From: bui duc phuc Change fec_ptp_init() to return an error code instead of silently ignoring failures during PTP initialization. The PPS IRQ is not required for the FEC/PTP functionality, so its absence should not make the probe fail. However, an unavailable optional IRQ should be distinguished from an actual error returned during the IRQ lookup. If a platform does not support the PPS IRQ, it can omit the IRQ from its device tree and the optional lookup will return -ENXIO. Propagate other errors from the IRQ lookup instead of silently ignoring them. Also propagate failures from devm_request_irq() and ptp_clock_register(). Update the function declaration in fec.h accordingly. Found by manual code inspection. Signed-off-by: bui duc phuc --- drivers/net/ethernet/freescale/fec.h | 2 +- drivers/net/ethernet/freescale/fec_ptp.c | 19 +++++++++++-------- 2 files changed, 12 insertions(+), 9 deletions(-) diff --git a/drivers/net/ethernet/freescale/fec.h b/drivers/net/ethernet/freescale/fec.h index 7176803146f3..8831da37326b 100644 --- a/drivers/net/ethernet/freescale/fec.h +++ b/drivers/net/ethernet/freescale/fec.h @@ -692,7 +692,7 @@ struct fec_enet_private { u64 ethtool_stats[]; }; -void fec_ptp_init(struct platform_device *pdev, int irq_idx); +int fec_ptp_init(struct platform_device *pdev, int irq_idx); void fec_ptp_restore_state(struct fec_enet_private *fep); void fec_ptp_save_state(struct fec_enet_private *fep); void fec_ptp_stop(struct platform_device *pdev); diff --git a/drivers/net/ethernet/freescale/fec_ptp.c b/drivers/net/ethernet/freescale/fec_ptp.c index 56801c2009d5..8ad680411b0c 100644 --- a/drivers/net/ethernet/freescale/fec_ptp.c +++ b/drivers/net/ethernet/freescale/fec_ptp.c @@ -736,7 +736,7 @@ static irqreturn_t fec_pps_interrupt(int irq, void *dev_id) * cyclecounter init routine and exits. */ -void fec_ptp_init(struct platform_device *pdev, int irq_idx) +int fec_ptp_init(struct platform_device *pdev, int irq_idx) { struct net_device *ndev = platform_get_drvdata(pdev); struct fec_enet_private *fep = netdev_priv(ndev); @@ -779,26 +779,29 @@ void fec_ptp_init(struct platform_device *pdev, int irq_idx) HRTIMER_MODE_REL); irq = platform_get_irq_byname_optional(pdev, "pps"); - if (irq < 0) + if (irq < 0) { irq = platform_get_irq_optional(pdev, irq_idx); - /* Failure to get an irq is not fatal, - * only the PTP_CLOCK_PPS clock events should stop - */ - if (irq >= 0) { + if (irq < 0 && irq != -ENXIO) + return irq; + } + + if (irq > 0) { ret = devm_request_irq(&pdev->dev, irq, fec_pps_interrupt, 0, pdev->name, ndev); if (ret < 0) - dev_warn(&pdev->dev, "request for pps irq failed(%d)\n", - ret); + return ret; } fep->ptp_clock = ptp_clock_register(&fep->ptp_caps, &pdev->dev); if (IS_ERR(fep->ptp_clock)) { fep->ptp_clock = NULL; dev_err(&pdev->dev, "ptp_clock_register failed\n"); + return PTR_ERR(fep->ptp_clock); } schedule_delayed_work(&fep->time_keep, HZ); + + return 0; } void fec_ptp_save_state(struct fec_enet_private *fep) -- 2.43.0