From: Nicolas Ferre <nicolas.ferre@microchip.com>
To: Tudor Ambarus - M18064 <Tudor.Ambarus@microchip.com>,
"stern@rowland.harvard.edu" <stern@rowland.harvard.edu>,
"gregkh@linuxfoundation.org" <gregkh@linuxfoundation.org>,
"alexandre.belloni@bootlin.com" <alexandre.belloni@bootlin.com>,
"Cristian Birsan - M91496" <Cristian.Birsan@microchip.com>,
"linux-usb@vger.kernel.org" <linux-usb@vger.kernel.org>,
"linux-arm-kernel@lists.infradead.org"
<linux-arm-kernel@lists.infradead.org>,
"linux-kernel@vger.kernel.org" <linux-kernel@vger.kernel.org>
Subject: Re: [PATCH v2] usb: host: ohci-at91: fix request of irq for optional gpio
Date: Mon, 15 Oct 2018 11:12:18 +0200 [thread overview]
Message-ID: <40003ebc-2aee-d4fb-a813-68c1c92a9b7a@microchip.com> (raw)
In-Reply-To: <20181015090001.5195-1-tudor.ambarus@microchip.com>
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 <tudor.ambarus@microchip.com>
As for v1 (patchwork friendly addition):
Acked-by: Nicolas Ferre <nicolas.ferre@microchip.com>
Bye,
Nicolas
> ---
> 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
next prev parent reply other threads:[~2018-10-15 9:12 UTC|newest]
Thread overview: 3+ messages / expand[flat|nested] mbox.gz Atom feed top
2018-10-15 9:00 [PATCH v2] usb: host: ohci-at91: fix request of irq for optional gpio Tudor.Ambarus
2018-10-15 9:12 ` Nicolas Ferre [this message]
2018-10-15 15:23 ` Alan Stern
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