From: Rob Clark <robdclark@gmail.com>
Date: Sat, 8 Nov 2014 15:16:19 +0000 (-0500)
Subject: drm/irq: BUG_ON() -> WARN_ON()
X-Git-Url: https://git.stricted.de/?a=commitdiff_plain;h=7f907bf284ba7bb8d271f094b226699d3fef2142;p=GitHub%2Fmoto-9609%2Fandroid_kernel_motorola_exynos9610.git

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>
---

diff --git a/drivers/gpu/drm/drm_irq.c b/drivers/gpu/drm/drm_irq.c
index 3e6b582f60dd..0e47df4ef24e 100644
--- 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;