diff options
Diffstat (limited to 'drivers/gpu')
| -rw-r--r-- | drivers/gpu/drm/i915/intel_display.c | 18 |
1 files changed, 14 insertions, 4 deletions
diff --git a/drivers/gpu/drm/i915/intel_display.c b/drivers/gpu/drm/i915/intel_display.c index 624d9bfc5c0b..0c6350cb201c 100644 --- a/drivers/gpu/drm/i915/intel_display.c +++ b/drivers/gpu/drm/i915/intel_display.c @@ -9328,6 +9328,10 @@ static void do_intel_finish_page_flip(struct drm_device *dev, if (intel_crtc == NULL) return; + /* + * This is called both by irq handlers and the reset code (to complete + * lost pageflips) so needs the full irqsave spinlocks. + */ spin_lock_irqsave(&dev->event_lock, flags); work = intel_crtc->unpin_work; @@ -9409,7 +9413,12 @@ void intel_prepare_page_flip(struct drm_device *dev, int plane) to_intel_crtc(dev_priv->plane_to_crtc_mapping[plane]); unsigned long flags; - /* NB: An MMIO update of the plane base pointer will also + + /* + * This is called both by irq handlers and the reset code (to complete + * lost pageflips) so needs the full irqsave spinlocks. + * + * NB: An MMIO update of the plane base pointer will also * generate a page-flip completion irq, i.e. every modeset * is also accompanied by a spurious intel_prepare_page_flip(). */ @@ -9866,18 +9875,19 @@ void intel_check_page_flip(struct drm_device *dev, int pipe) struct drm_i915_private *dev_priv = dev->dev_private; struct drm_crtc *crtc = dev_priv->pipe_to_crtc_mapping[pipe]; struct intel_crtc *intel_crtc = to_intel_crtc(crtc); - unsigned long flags; + + WARN_ON(!in_irq()); if (crtc == NULL) return; - spin_lock_irqsave(&dev->event_lock, flags); + spin_lock(&dev->event_lock); if (intel_crtc->unpin_work && __intel_pageflip_stall_check(dev, crtc)) { WARN_ONCE(1, "Kicking stuck page flip: queued at %d, now %d\n", intel_crtc->unpin_work->flip_queued_vblank, drm_vblank_count(dev, pipe)); page_flip_completed(intel_crtc); } - spin_unlock_irqrestore(&dev->event_lock, flags); + spin_unlock(&dev->event_lock); } static int intel_crtc_page_flip(struct drm_crtc *crtc, |