Revert "drm/i915: Exit cherryview_irq_handler() after one pass"

This reverts commit 9dbaab56ac09f07a73fe83bf69bec3e31060080a.

Turns out it was a bad idea and was fixed up "properly" in 4.7 but those
patches are too big to put into 4.6, so let's just revert it for now.

Reported-by: Ville Syrjälä <ville.syrjala@linux.intel.com>
Cc: Daniel Vetter <daniel@ffwll.ch>
Cc: Peter Frühberger <peter.fruehberger@gmail.com>
Cc: Chris Wilson <chris@chris-wilson.co.uk>
Cc: Jani Nikula <jani.nikula@intel.com>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>

diff --git a/drivers/gpu/drm/i915/i915_irq.c b/drivers/gpu/drm/i915/i915_irq.c
index 1c212205d0e7fd856e3298a10f6c039210bb570f..d1a46ef5ab3f4b051b42599805266cd5fbd2bc7e 100644 (file)
--- a/drivers/gpu/drm/i915/i915_irq.c
+++ b/drivers/gpu/drm/i915/i915_irq.c
@@ -1829,7 +1829,7 @@ static irqreturn_t cherryview_irq_handler(int irq, void *arg)
        /* IRQs are synced during runtime_suspend, we don't require a wakeref */
        disable_rpm_wakeref_asserts(dev_priv);
 
-       do {
+       for (;;) {
                master_ctl = I915_READ(GEN8_MASTER_IRQ) & ~GEN8_MASTER_IRQ_CONTROL;
                iir = I915_READ(VLV_IIR);
 
@@ -1857,7 +1857,7 @@ static irqreturn_t cherryview_irq_handler(int irq, void *arg)
 
                I915_WRITE(GEN8_MASTER_IRQ, DE_MASTER_IRQ_CONTROL);
                POSTING_READ(GEN8_MASTER_IRQ);
-       } while (0);
+       }
 
        enable_rpm_wakeref_asserts(dev_priv);