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SubjectRe: [PATCH v2 7/8] drivers/media/platform/davinci/vpbe.c: Removes useless kfree()
From
2012/9/12 Peter Senna Tschudin <peter.senna@gmail.com>:
> From: Peter Senna Tschudin <peter.senna@gmail.com>
>
> Remove useless kfree() and clean up code related to the removal.
>
> The semantic patch that finds this problem is as follows:
> (http://coccinelle.lip6.fr/)
>
> // <smpl>
> @r exists@
> position p1,p2;
> expression x;
> @@
>
> if (x@p1 == NULL) { ... kfree@p2(x); ... return ...; }
>
> @unchanged exists@
> position r.p1,r.p2;
> expression e <= r.x,x,e1;
> iterator I;
> statement S;
> @@
>
> if (x@p1 == NULL) { ... when != I(x,...) S
> when != e = e1
> when != e += e1
> when != e -= e1
> when != ++e
> when != --e
> when != e++
> when != e--
> when != &e
> kfree@p2(x); ... return ...; }
>
> @ok depends on unchanged exists@
> position any r.p1;
> position r.p2;
> expression x;
> @@
>
> ... when != true x@p1 == NULL
> kfree@p2(x);
>
> @depends on !ok && unchanged@
> position r.p2;
> expression x;
> @@
>
> *kfree@p2(x);
> // </smpl>
>
> Signed-off-by: Peter Senna Tschudin <peter.senna@gmail.com>
>
> ---
> drivers/media/platform/davinci/vpbe.c | 1 -
> 1 file changed, 1 deletion(-)
>
> diff --git a/drivers/media/platform/davinci/vpbe.c b/drivers/media/platform/davinci/vpbe.c
> index c4a82a1..1125a87 100644
> --- a/drivers/media/platform/davinci/vpbe.c
> +++ b/drivers/media/platform/davinci/vpbe.c
> @@ -771,7 +771,6 @@ static int vpbe_initialize(struct device *dev, struct vpbe_device *vpbe_dev)
> return 0;
>
> vpbe_fail_amp_register:
> - kfree(vpbe_dev->amp);

Now that you removed this kfree, you could remove this label too. Very
nice your cleanup :)

> vpbe_fail_sd_register:
> kfree(vpbe_dev->encoders);
> vpbe_fail_v4l2_device:
>
> --
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