[PATCH v2] usb: host: ohci-at91: fix request of irq for optional gpio
From: nicolas.ferre@microchip.com (Nicolas Ferre)
Date: 2018-10-15 09:12:23
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linux-usb, lkml
On 15/10/2018 at 11:00, Tudor Ambarus - M18064 wrote:
atmel,oc-gpio is optional. Request its irq only when atmel,oc is set in device tree. devm_gpiod_get_index_optional returns NULL if -ENOENT. Check its return value for NULL before error, because it is more probable that atmel,oc is not set. This fixes the following errors on boards where atmel,oc is not set in device tree: [ 0.960000] at91_ohci 500000.ohci: failed to request gpio "overcurrent" IRQ [ 0.960000] at91_ohci 500000.ohci: failed to request gpio "overcurrent" IRQ [ 0.970000] at91_ohci 500000.ohci: failed to request gpio "overcurrent" IRQ Signed-off-by: Tudor Ambarus <redacted>
As for v1 (patchwork friendly addition): Acked-by: Nicolas Ferre <nicolas.ferre@microchip.com> Bye, Nicolas
quoted hunk ↗ jump to hunk
--- v2: fix typos in commit message s/it's/its, s/probably/probable Based on https://git.kernel.org/pub/scm/linux/kernel/git/gregkh/usb.git, usb-next branch. drivers/usb/host/ohci-at91.c | 2 ++ 1 file changed, 2 insertions(+)diff --git a/drivers/usb/host/ohci-at91.c b/drivers/usb/host/ohci-at91.c index e98673954020..ec6739ef3129 100644 --- a/drivers/usb/host/ohci-at91.c +++ b/drivers/usb/host/ohci-at91.c@@ -551,6 +551,8 @@ static int ohci_hcd_at91_drv_probe(struct platform_device *pdev) pdata->overcurrent_pin[i] = devm_gpiod_get_index_optional(&pdev->dev, "atmel,oc", i, GPIOD_IN); + if (!pdata->overcurrent_pin[i]) + continue; if (IS_ERR(pdata->overcurrent_pin[i])) { err = PTR_ERR(pdata->overcurrent_pin[i]); dev_err(&pdev->dev, "unable to claim gpio \"overcurrent\": %d\n", err);
-- Nicolas Ferre