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drm/i915: Eliminate loop from VLV irq handler 

Now that we've dealt with the races in clearing IIR bits via VLV_IER
and the master interrupt enable, we can go ahead aliminate the loop
from the VLV interrupt handler.

Signed-off-by: Ville Syrjälä <ville.syrjala@linux.intel.com>
Link: http://patchwork.freedesktop.org/patch/msgid/1460571598-24452-7-git-send-email-ville.syrjala@linux.intel.com
Reviewed-by: Chris Wilson <chris@chris-wilson.co.uk>
This commit is contained in:
Ville Syrjälä 2016-04-13 21:19:52 +03:00
parent a5e485a95c
commit 1e1cace942
1 changed files with 3 additions and 4 deletions
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7
drivers/gpu/drm/i915/i915_irq.c
View File

@ -1777,7 +1777,7 @@ static irqreturn_t valleyview_irq_handler(int irq, void *arg)
/* IRQs are synced during runtime_suspend, we don't require a wakeref */
disable_rpm_wakeref_asserts(dev_priv);
while (true) {
do {
u32 ier = 0;
gt_iir = I915_READ(GTIIR);
@ -1785,7 +1785,7 @@ static irqreturn_t valleyview_irq_handler(int irq, void *arg)
iir = I915_READ(VLV_IIR);
if (gt_iir == 0 && pm_iir == 0 && iir == 0)
goto out;
break;
ret = IRQ_HANDLED;
@ -1833,9 +1833,8 @@ static irqreturn_t valleyview_irq_handler(int irq, void *arg)
I915_WRITE(VLV_IER, ier);
I915_WRITE(VLV_MASTER_IER, MASTER_INTERRUPT_ENABLE);
POSTING_READ(VLV_MASTER_IER);
}
} while (0);
out:
enable_rpm_wakeref_asserts(dev_priv);
return ret;