[Intel-gfx] [RFC 2/3] drm: Handle the vblank_offdelay=0 case properly

[Matthew Garrett]

Right now if vblank_offdelay is 0, vblanks won't be disabled after the
last user. Fix that case up.

Signed-off-by: Matthew Garrett <mjg at redhat.com>
---
 drivers/gpu/drm/drm_irq.c |    3 +--
 1 files changed, 1 insertions(+), 2 deletions(-)

diff --git a/drivers/gpu/drm/drm_irq.c b/drivers/gpu/drm/drm_irq.c
index 8bcb6a4..94f9579 100644
--- a/drivers/gpu/drm/drm_irq.c
+++ b/drivers/gpu/drm/drm_irq.c
@@ -935,8 +935,7 @@ void drm_vblank_put(struct drm_device *dev, int crtc)
 	BUG_ON(atomic_read(&dev->vblank_refcount[crtc]) == 0);
 
 	/* Last user schedules interrupt disable */
-	if (atomic_dec_and_test(&dev->vblank_refcount[crtc]) &&
-	    (dev->vblank_offdelay > 0))
+	if (atomic_dec_and_test(&dev->vblank_refcount[crtc]))
 		mod_timer(&dev->vblank_disable_timer,
 			  jiffies + ((dev->vblank_offdelay * DRM_HZ)/1000));
 }
-- 
1.7.7.1