[PATCH] gpio: mockup: add missing single_release()

[PATCH] gpio: mockup: add missing single_release()

[Wei Yongjun]

When using single_open() for opening, single_release() should be
used instead of seq_release(), otherwise there is a memory leak.

Fixes: 2a9e27408e12 ("gpio: mockup: rework debugfs interface")
Signed-off-by: Wei Yongjun <weiyongjun1@huawei.com>
---
 drivers/gpio/gpio-mockup.c | 1 +
 1 file changed, 1 insertion(+)

diff --git a/drivers/gpio/gpio-mockup.c b/drivers/gpio/gpio-mockup.c
index f1a9c0544e3f..213aedc97dc2 100644
--- a/drivers/gpio/gpio-mockup.c
+++ b/drivers/gpio/gpio-mockup.c
@@ -309,6 +309,7 @@ static const struct file_operations gpio_mockup_debugfs_ops = {
 	.read = gpio_mockup_debugfs_read,
 	.write = gpio_mockup_debugfs_write,
 	.llseek = no_llseek,
+	.release = single_release,
 };
 
 static void gpio_mockup_debugfs_setup(struct device *dev,

Re: [PATCH] gpio: mockup: add missing single_release()

[Bartosz Golaszewski]

śr., 4 wrz 2019 o 16:00 Wei Yongjun <weiyongjun1@huawei.com> napisał(a):
>
> When using single_open() for opening, single_release() should be
> used instead of seq_release(), otherwise there is a memory leak.
>
> Fixes: 2a9e27408e12 ("gpio: mockup: rework debugfs interface")
> Signed-off-by: Wei Yongjun <weiyongjun1@huawei.com>
> ---
>  drivers/gpio/gpio-mockup.c | 1 +
>  1 file changed, 1 insertion(+)
>
> diff --git a/drivers/gpio/gpio-mockup.c b/drivers/gpio/gpio-mockup.c
> index f1a9c0544e3f..213aedc97dc2 100644
> --- a/drivers/gpio/gpio-mockup.c
> +++ b/drivers/gpio/gpio-mockup.c
> @@ -309,6 +309,7 @@ static const struct file_operations gpio_mockup_debugfs_ops = {
>         .read = gpio_mockup_debugfs_read,
>         .write = gpio_mockup_debugfs_write,
>         .llseek = no_llseek,
> +       .release = single_release,
>  };
>
>  static void gpio_mockup_debugfs_setup(struct device *dev,
>
>
>

Good catch!

Reviewed-by: Bartosz Golaszewski <bgolaszewski@baylibre.com>

Linus: can you pick it up for your last pull-requests with fixes for v5.3?

Bart

Re: [PATCH] gpio: mockup: add missing single_release()

[Bartosz Golaszewski]

śr., 4 wrz 2019 o 16:54 Bartosz Golaszewski
<bgolaszewski@baylibre.com> napisał(a):
>
> śr., 4 wrz 2019 o 16:00 Wei Yongjun <weiyongjun1@huawei.com> napisał(a):
> >
> > When using single_open() for opening, single_release() should be
> > used instead of seq_release(), otherwise there is a memory leak.
> >
> > Fixes: 2a9e27408e12 ("gpio: mockup: rework debugfs interface")
> > Signed-off-by: Wei Yongjun <weiyongjun1@huawei.com>
> > ---
> >  drivers/gpio/gpio-mockup.c | 1 +
> >  1 file changed, 1 insertion(+)
> >
> > diff --git a/drivers/gpio/gpio-mockup.c b/drivers/gpio/gpio-mockup.c
> > index f1a9c0544e3f..213aedc97dc2 100644
> > --- a/drivers/gpio/gpio-mockup.c
> > +++ b/drivers/gpio/gpio-mockup.c
> > @@ -309,6 +309,7 @@ static const struct file_operations gpio_mockup_debugfs_ops = {
> >         .read = gpio_mockup_debugfs_read,
> >         .write = gpio_mockup_debugfs_write,
> >         .llseek = no_llseek,
> > +       .release = single_release,
> >  };
> >
> >  static void gpio_mockup_debugfs_setup(struct device *dev,
> >
> >
> >
>
> Good catch!
>
> Reviewed-by: Bartosz Golaszewski <bgolaszewski@baylibre.com>
>
> Linus: can you pick it up for your last pull-requests with fixes for v5.3?
>
> Bart

Nevermind - I applied it to my tree and will send it with two other
fixes in a PR.

Bart