On Mon, Jul 6, 2015 at 4:00 AM, SF Markus Elfring <elfring@users.sourceforge.net> wrote:
From: Markus Elfring <elfring@users.sourceforge.net>
Date: Sun, 5 Jul 2015 21:55:10 +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@users.sourceforge.net>

Reviewed-by: Zhao Junwang <zhjwpku@gmail.com
---
 drivers/gpu/drm/drm_crtc.c | 4 +---
 1 file changed, 1 insertion(+), 3 deletions(-)

diff --git a/drivers/gpu/drm/drm_crtc.c b/drivers/gpu/drm/drm_crtc.c
index 2d57fc5..6e4c8b0 100644
--- a/drivers/gpu/drm/drm_crtc.c
+++ b/drivers/gpu/drm/drm_crtc.c
@@ -4469,9 +4469,7 @@ static int drm_property_replace_global_blob(struct drm_device *dev,
                        goto err_created;
        }

-       if (old_blob)
-               drm_property_unreference_blob(old_blob);
-
+       drm_property_unreference_blob(old_blob);
        *replace = new_blob;

        return 0;
--
2.4.5

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--
Best regards
Junwang Zhao
Microprocessor Research and Develop Center
Department of Computer Science &Technology
Peking University
Beijing, 100871, PRC