drm/i915: Exit cherryview_irq_handler() after one pass

[karo-tx-linux.git] / drivers / gpu / drm / i915 / i915_irq.c

diff --git a/drivers/gpu/drm/i915/i915_irq.c b/drivers/gpu/drm/i915/i915_irq.c
index d1a46ef5ab3f4b051b42599805266cd5fbd2bc7e..1c212205d0e7fd856e3298a10f6c039210bb570f 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);
 
-       for (;;) {
+       do {
                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);