On Tuesday, April 30, 2013 1:44 AM, Guenter Roeck wrote:
> On Mon, Apr 29, 2013 at 06:30:43PM +0900, Jingoo Han wrote:
> > Use devm_gpio_request_one() to make cleanup paths simpler.
> >
> > Signed-off-by: Jingoo Han <jg1....@samsung.com>
>
> This patch also addresses the missing gpio_free in the probe error path
> (if the call to misc_register() fails).
When devm_gpio_request_one() is used, there is no need to call
devm_gpio_free().
It is because, these resource managed functions such as
devm_gpio_request_one() allow the driver core to automatically
clean up any allocation, when probe function fails.
>
> Reviewed-by: Guenter Roeck <li...@roeck-us.net>
Thank you for your reviewing.
Best regards,
Jingoo Han
>
> > ---
> > drivers/watchdog/mtx-1_wdt.c | 3 +--
> > 1 files changed, 1 insertions(+), 2 deletions(-)
> >
> > diff --git a/drivers/watchdog/mtx-1_wdt.c b/drivers/watchdog/mtx-1_wdt.c
> > index 14dab6f..b434111 100644
> > --- a/drivers/watchdog/mtx-1_wdt.c
> > +++ b/drivers/watchdog/mtx-1_wdt.c
> > @@ -209,7 +209,7 @@ static int mtx1_wdt_probe(struct platform_device *pdev)
> > int ret;
> >
> > mtx1_wdt_device.gpio = pdev->resource[0].start;
> > - ret = gpio_request_one(mtx1_wdt_device.gpio,
> > + ret = devm_gpio_request_one(&pdev->dev, mtx1_wdt_device.gpio,
> > GPIOF_OUT_INIT_HIGH, "mtx1-wdt");
> > if (ret < 0) {
> > dev_err(&pdev->dev, "failed to request gpio");
> > @@ -241,7 +241,6 @@ static int mtx1_wdt_remove(struct platform_device *pdev)
> > wait_for_completion(&mtx1_wdt_device.stop);
> > }
> >
> > - gpio_free(mtx1_wdt_device.gpio);
> > misc_deregister(&mtx1_wdt_misc);
> > return 0;
> > }
> > --
> > 1.7.2.5
> >
> >
> > --
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> >
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