diff mbox

[01/12] drm: Use correct spinlock flavor in drm_vblank_get()

Message ID 1400093477-3217-2-git-send-email-daniel.vetter@ffwll.ch (mailing list archive)
State New, archived
Headers show

Commit Message

Daniel Vetter May 14, 2014, 6:51 p.m. UTC 
From: Peter Hurley <peter@hurleysoftware.com>

The irq flags state is already established by the outer
spin_lock_irqsave(); re-disabling irqs is redundant.

Signed-off-by: Peter Hurley <peter@hurleysoftware.com>
Signed-off-by: Daniel Vetter <daniel.vetter@ffwll.ch>
---
 drivers/gpu/drm/drm_irq.c | 6 +++---
 1 file changed, 3 insertions(+), 3 deletions(-)

Comments

Thierry Reding May 21, 2014, 11:08 a.m. UTC | #1 
On Wed, May 14, 2014 at 08:51:03PM +0200, Daniel Vetter wrote:
> From: Peter Hurley <peter@hurleysoftware.com>
> 
> The irq flags state is already established by the outer
> spin_lock_irqsave(); re-disabling irqs is redundant.
> 
> Signed-off-by: Peter Hurley <peter@hurleysoftware.com>
> Signed-off-by: Daniel Vetter <daniel.vetter@ffwll.ch>
> ---
>  drivers/gpu/drm/drm_irq.c | 6 +++---
>  1 file changed, 3 insertions(+), 3 deletions(-)

Reviewed-by: Thierry Reding <treding@nvidia.com>
diff mbox

Patch

diff --git a/drivers/gpu/drm/drm_irq.c b/drivers/gpu/drm/drm_irq.c
index 7583767ec619..ea20c4aa1b6b 100644
--- a/drivers/gpu/drm/drm_irq.c
+++ b/drivers/gpu/drm/drm_irq.c
@@ -848,13 +848,13 @@  static void drm_update_vblank_count(struct drm_device *dev, int crtc)
  */
 int drm_vblank_get(struct drm_device *dev, int crtc)
 {
-	unsigned long irqflags, irqflags2;
+	unsigned long irqflags;
 	int ret = 0;
 
 	spin_lock_irqsave(&dev->vbl_lock, irqflags);
 	/* Going from 0->1 means we have to enable interrupts again */
 	if (atomic_add_return(1, &dev->vblank[crtc].refcount) == 1) {
-		spin_lock_irqsave(&dev->vblank_time_lock, irqflags2);
+		spin_lock(&dev->vblank_time_lock);
 		if (!dev->vblank[crtc].enabled) {
 			/* Enable vblank irqs under vblank_time_lock protection.
 			 * All vblank count & timestamp updates are held off
@@ -872,7 +872,7 @@  int drm_vblank_get(struct drm_device *dev, int crtc)
 				drm_update_vblank_count(dev, crtc);
 			}
 		}
-		spin_unlock_irqrestore(&dev->vblank_time_lock, irqflags2);
+		spin_unlock(&dev->vblank_time_lock);
 	} else {
 		if (!dev->vblank[crtc].enabled) {
 			atomic_dec(&dev->vblank[crtc].refcount);