drm/radeon: Use unlocked gem unreferencing

BugLink: http://bugs.launchpad.net/bugs/1546572
For drm_gem_object_unreference callers are required to hold
dev->struct_mutex, which these paths don't. Enforcing this requirement
has become a bit more strict with

commit ef4c6270bf2867e2f8032e9614d1a8cfc6c71663
Author: Daniel Vetter <daniel.vetter@ffwll.ch>
Date:   Thu Oct 15 09:36:25 2015 +0200

    drm/gem: Check locking in drm_gem_object_unreference

Cc: Alex Deucher <alexander.deucher@amd.com>
Reviewed-by: Christian König <christian.koenig@amd.com>
Signed-off-by: Daniel Vetter <daniel.vetter@intel.com>
Signed-off-by: Alex Deucher <alexander.deucher@amd.com>
(cherry picked from commit 623fc3b7bdbfd64536576f71f87652385d4d88fc)
Signed-off-by: Alberto Milone <alberto.milone@canonical.com>
Signed-off-by: Tim Gardner <tim.gardner@canonical.com>

diff --git a/drivers/gpu/drm/radeon/radeon_fb.c b/drivers/gpu/drm/radeon/radeon_fb.c
index 26da2f4d7b4f56fca3948af07bca9c061bb5ddaf..eb1789d633264a641d77d9936e6e6f08ca181a41 100644 (file)
--- a/drivers/gpu/drm/radeon/radeon_fb.c
+++ b/drivers/gpu/drm/radeon/radeon_fb.c
@@ -283,7 +283,7 @@ out_unref:
 
        }
        if (fb && ret) {
-               drm_gem_object_unreference(gobj);
+               drm_gem_object_unreference_unlocked(gobj);
                drm_framebuffer_unregister_private(fb);
                drm_framebuffer_cleanup(fb);
                kfree(fb);