drm: Use correct spinlock flavor in drm_vblank_get()
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>
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@ -848,13 +848,13 @@ static void drm_update_vblank_count(struct drm_device *dev, int crtc)
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*/
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int drm_vblank_get(struct drm_device *dev, int crtc)
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{
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unsigned long irqflags, irqflags2;
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unsigned long irqflags;
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int ret = 0;
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spin_lock_irqsave(&dev->vbl_lock, irqflags);
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/* Going from 0->1 means we have to enable interrupts again */
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if (atomic_add_return(1, &dev->vblank[crtc].refcount) == 1) {
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spin_lock_irqsave(&dev->vblank_time_lock, irqflags2);
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spin_lock(&dev->vblank_time_lock);
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if (!dev->vblank[crtc].enabled) {
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/* Enable vblank irqs under vblank_time_lock protection.
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* All vblank count & timestamp updates are held off
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@ -872,7 +872,7 @@ int drm_vblank_get(struct drm_device *dev, int crtc)
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drm_update_vblank_count(dev, crtc);
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}
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}
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spin_unlock_irqrestore(&dev->vblank_time_lock, irqflags2);
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spin_unlock(&dev->vblank_time_lock);
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} else {
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if (!dev->vblank[crtc].enabled) {
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atomic_dec(&dev->vblank[crtc].refcount);
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