linux-kernel - Re: [PATCH 1/1] DRM-vmwgfx: Deletion of an unnecessary check before the function call "vfree"

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Message-ID: <559A35C9.8050201@users.sourceforge.net>
Date:	Mon, 06 Jul 2015 10:01:13 +0200
From:	SF Markus Elfring <elfring@...rs.sourceforge.net>
To:	David Airlie <airlied@...ux.ie>, dri-devel@...ts.freedesktop.org
CC:	LKML <linux-kernel@...r.kernel.org>,
	kernel-janitors@...r.kernel.org,
	Julia Lawall <julia.lawall@...6.fr>
Subject: Re: [PATCH 1/1] DRM-vmwgfx: Deletion of an unnecessary check before
 the function call "vfree"

From: Markus Elfring <elfring@...rs.sourceforge.net>
Date: Mon, 6 Jul 2015 09:49:11 +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>
---
 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 654c8da..f718a6d 100644
--- a/drivers/gpu/drm/vmwgfx/vmwgfx_execbuf.c
+++ b/drivers/gpu/drm/vmwgfx/vmwgfx_execbuf.c
@@ -2292,9 +2292,7 @@ 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) {
-- 
2.4.5

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