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

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Date:	Fri, 22 Jul 2016 13:45:40 +0200
From:	SF Markus Elfring <elfring@...rs.sourceforge.net>
To:	linux-graphics-maintainer@...are.com,
	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>
Cc:	LKML <linux-kernel@...r.kernel.org>,
	kernel-janitors@...r.kernel.org,
	Julia Lawall <julia.lawall@...6.fr>
Subject: [PATCH] drm/vmwgfx: Delete an unnecessary check before the function
 call "vfree"

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>
---
 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