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

commit 7f907bf284ba7bb8d271f094b226699d3fef2142 upstream.

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>
Cc: Anand Moon <moon.linux@yahoo.com>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>

diff --git a/drivers/gpu/drm/drm_irq.c b/drivers/gpu/drm/drm_irq.c
index 5ef03c216a2740818468ef64ebb1a056f1644235..c4edea907f8f8d0fa46b6bf206ebbab3d449aaab 100644 (file)
--- a/drivers/gpu/drm/drm_irq.c
+++ b/drivers/gpu/drm/drm_irq.c
@@ -1029,7 +1029,8 @@ void drm_vblank_put(struct drm_device *dev, int crtc)
 {
        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;