linux-kernel - Re: [PATCH] drm/vmwgfx: Delete an unnecessary check before the function call "vfree"

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Message-ID: <CAOw6vb+fnYaxoo6b0z8=Z6CR79hZPFxCCtq0GdezG9GBJPEjPg@mail.gmail.com>
Date:	Fri, 22 Jul 2016 11:25:27 -0400
From:	Sean Paul <seanpaul@...omium.org>
To:	SF Markus Elfring <elfring@...rs.sourceforge.net>
Cc:	linux-graphics-maintainer@...are.com,
	dri-devel <dri-devel@...ts.freedesktop.org>,
	David Airlie <airlied@...ux.ie>,
	Junwang Zhao <zhjwpku@...il.com>,
	Thomas Hellstrom <thellstrom@...are.com>,
	Sinclair Yeh <syeh@...are.com>,
	Julia Lawall <julia.lawall@...6.fr>,
	kernel-janitors@...r.kernel.org,
	LKML <linux-kernel@...r.kernel.org>
Subject: Re: [PATCH] drm/vmwgfx: Delete an unnecessary check before the
 function call "vfree"

On Fri, Jul 22, 2016 at 7:45 AM, SF Markus Elfring
<elfring@...rs.sourceforge.net> wrote:
> From: Markus Elfring <elfring@...rs.sourceforge.net>
> Date: Fri, 22 Jul 2016 13:31:00 +0200
>
> The vfree() function performs also input parameter validation.
> Thus the test around the call is not needed.
>
> This issue was detected by using the Coccinelle software.
>
> Signed-off-by: Markus Elfring <elfring@...rs.sourceforge.net>

Applied to drm-misc

> ---
>  drivers/gpu/drm/vmwgfx/vmwgfx_execbuf.c | 4 +---
>  1 file changed, 1 insertion(+), 3 deletions(-)
>
> diff --git a/drivers/gpu/drm/vmwgfx/vmwgfx_execbuf.c b/drivers/gpu/drm/vmwgfx/vmwgfx_execbuf.c
> index 1a1a87c..dc5beff 100644
> --- a/drivers/gpu/drm/vmwgfx/vmwgfx_execbuf.c
> +++ b/drivers/gpu/drm/vmwgfx/vmwgfx_execbuf.c
> @@ -3625,9 +3625,7 @@ static int vmw_resize_cmd_bounce(struct vmw_sw_context *sw_context,
>                                    (sw_context->cmd_bounce_size >> 1));
>         }
>
> -       if (sw_context->cmd_bounce != NULL)
> -               vfree(sw_context->cmd_bounce);
> -
> +       vfree(sw_context->cmd_bounce);
>         sw_context->cmd_bounce = vmalloc(sw_context->cmd_bounce_size);
>
>         if (sw_context->cmd_bounce == NULL) {
> --
> 2.9.2
>
> _______________________________________________
> dri-devel mailing list
> dri-devel@...ts.freedesktop.org
> https://lists.freedesktop.org/mailman/listinfo/dri-devel

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