drm/radeon: fix radeon_fence_wait_empty_locked

Don't block forever if there is nothing to wait for. Signed-off-by: Christian König <christian.koenig@amd.com> Tested-by: Rafa? Mi?ecki <zajec5@gmail.com> Signed-off-by: Dave Airlie <airlied@redhat.com>
mariux64 · Nov 6, 2013 · 721529b · 721529b
1 parent d9bbf18
commit 721529b
Showing 1 changed file with 3 additions and 0 deletions.
diff --git a/drivers/gpu/drm/radeon/radeon_fence.c b/drivers/gpu/drm/radeon/radeon_fence.c
@@ -510,6 +510,9 @@ int radeon_fence_wait_empty_locked(struct radeon_device *rdev, int ring)
 	int r;
 
 	seq[ring] = rdev->fence_drv[ring].sync_seq[ring];
+	if (!seq[ring])
+		return 0;
+
 	r = radeon_fence_wait_seq(rdev, seq, false, false);
 	if (r) {
 		if (r == -EDEADLK)