commit 7f907bf284ba7bb8d271f094b226699d3fef2142
author Rob Clark <robdclark@gmail.com> Sat Nov 08 10:16:19 2014 -0500
committer Dave Airlie <airlied@redhat.com> Thu Nov 20 11:33:51 2014 +1000
tree 2d63eb100e045718cc273369517492e27c5e83ba
parent 881fdaa5e4cb0d68e52acab0ad4e1820e2bfffa4

drm/irq: BUG_ON() -> WARN_ON()

Let's make things a bit easier to debug when things go bad (potentially
under console_lock).

Signed-off-by: Rob Clark <robdclark@gmail.com>
Reviewed-by: Michel Dänzer <michel.daenzer@amd.com>
Signed-off-by: Dave Airlie <airlied@redhat.com>

drivers/gpu/drm/drm_irq.c

diff --git a/drivers/gpu/drm/drm_irq.c b/drivers/gpu/drm/drm_irq.c
index 3e6b582..0e47df4 100644
--- a/drivers/gpu/drm/drm_irq.c
+++ b/drivers/gpu/drm/drm_irq.c
@@ -1029,7 +1029,8 @@
 {
 	struct drm_vblank_crtc *vblank = &dev->vblank[crtc];
 
-	BUG_ON(atomic_read(&vblank->refcount) == 0);
+	if (WARN_ON(atomic_read(&vblank->refcount) == 0))
+		return;
 
 	if (WARN_ON(crtc >= dev->num_crtcs))
 		return;