From: Michel Dänzer <michel@tungstengraphics.com>
Date: Fri, 29 Sep 2006 08:27:29 +0000 (+0200)
Subject: i915: Only schedule vblank tasklet if there are scheduled swaps pending.
X-Git-Tag: submit/1.0/20121108.012404~1363
X-Git-Url: http://review.tizen.org/git/?a=commitdiff_plain;h=7af93dd9849442270ec89cb4bbeef5bfd4f9e424;p=profile%2Fivi%2Flibdrm.git

i915: Only schedule vblank tasklet if there are scheduled swaps pending.

This fixes issues on X server startup with versions of xf86-video-intel that
enable the IRQ before they have a context ID.
---

diff --git a/shared-core/i915_irq.c b/shared-core/i915_irq.c
index fbc6674..76c3a81 100644
--- a/shared-core/i915_irq.c
+++ b/shared-core/i915_irq.c
@@ -171,7 +171,8 @@ irqreturn_t i915_driver_irq_handler(DRM_IRQ_ARGS)
 		DRM_WAKEUP(&dev->vbl_queue);
 		drm_vbl_send_signals(dev);
 
-		drm_locked_tasklet(dev, i915_vblank_tasklet);
+		if (dev_priv->swaps_pending > 0)
+			drm_locked_tasklet(dev, i915_vblank_tasklet);
 	}
 
 	return IRQ_HANDLED;