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Make sure we ack irqs before we read a breadcrumb so that

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breadcrumb updates that occur _AFTER_ we've read the breadcrumb really
generates a new IRQ.
This commit is contained in:
Thomas Hellstrom 2007-04-03 10:21:41 +02:00
parent 7743af9449
commit 139e4bbc73
1 changed files with 2 additions and 0 deletions
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2
shared-core/i915_irq.c
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@ -294,6 +294,8 @@ irqreturn_t i915_driver_irq_handler(DRM_IRQ_ARGS)
return IRQ_NONE;
I915_WRITE16(I915REG_INT_IDENTITY_R, temp);
(void) I915_READ16(I915REG_INT_IDENTITY_R);
DRM_READMEMORYBARRIER();
dev_priv->sarea_priv->last_dispatch = READ_BREADCRUMB(dev_priv);