linux-kernel - [PATCH] drm/atomic: Delete an unnecessary check before drm_property_unreference

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Date:	Wed, 20 Jul 2016 18:02:42 +0200
From:	SF Markus Elfring <elfring@...rs.sourceforge.net>
To:	dri-devel@...ts.freedesktop.org, Daniel Vetter <daniel@...ll.ch>,
	David Airlie <airlied@...ux.ie>,
	Maarten Lankhorst <maarten.lankhorst@...ux.intel.com>
Cc:	LKML <linux-kernel@...r.kernel.org>,
	kernel-janitors@...r.kernel.org,
	Julia Lawall <julia.lawall@...6.fr>
Subject: [PATCH] drm/atomic: Delete an unnecessary check before
 drm_property_unreference_blob()

From: Markus Elfring <elfring@...rs.sourceforge.net>
Date: Wed, 20 Jul 2016 17:54:32 +0200

The drm_property_unreference_blob() function tests whether its argument
is NULL and then returns immediately.
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/drm_atomic.c | 3 +--
 1 file changed, 1 insertion(+), 2 deletions(-)

diff --git a/drivers/gpu/drm/drm_atomic.c b/drivers/gpu/drm/drm_atomic.c
index 3cee084..8d2f111 100644
--- a/drivers/gpu/drm/drm_atomic.c
+++ b/drivers/gpu/drm/drm_atomic.c
@@ -404,8 +404,7 @@ drm_atomic_replace_property_blob(struct drm_property_blob **blob,
 	if (old_blob == new_blob)
 		return;
 
-	if (old_blob)
-		drm_property_unreference_blob(old_blob);
+	drm_property_unreference_blob(old_blob);
 	if (new_blob)
 		drm_property_reference_blob(new_blob);
 	*blob = new_blob;
-- 
2.9.2