The drm_gem_object_unreference_unlocked() 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>
Signed-off-by: Alex Deucher <alexander.deucher@amd.com>
 {
        struct radeon_framebuffer *radeon_fb = to_radeon_framebuffer(fb);
 
-       if (radeon_fb->obj) {
-               drm_gem_object_unreference_unlocked(radeon_fb->obj);
-       }
+       drm_gem_object_unreference_unlocked(radeon_fb->obj);
        drm_framebuffer_cleanup(fb);
        kfree(radeon_fb);
 }