[Intel-gfx] [PATCH 1/2] drm/i915: Only WARN about a stuck hotplug irq ONCE

[Chris Wilson]

It seems that hardware that is broken enough to emit a hotplug IRQ even
though the pin is surposedly disable, will do so indefinitely.

References: https://bugzilla.redhat.com/show_bug.cgi?id=1051170
Link: https://bugzilla.redhat.com/show_bug.cgi?id=1051369
Signed-off-by: Chris Wilson <chris at chris-wilson.co.uk>
---
 drivers/gpu/drm/i915/i915_irq.c | 6 +++---
 1 file changed, 3 insertions(+), 3 deletions(-)

diff --git a/drivers/gpu/drm/i915/i915_irq.c b/drivers/gpu/drm/i915/i915_irq.c
index ec67bb8aff0a..3be8bcd4d797 100644
--- a/drivers/gpu/drm/i915/i915_irq.c
+++ b/drivers/gpu/drm/i915/i915_irq.c
@@ -1247,9 +1247,9 @@ static inline void intel_hpd_irq_handler(struct drm_device *dev,
 	spin_lock(&dev_priv->irq_lock);
 	for (i = 1; i < HPD_NUM_PINS; i++) {
 
-		WARN(((hpd[i] & hotplug_trigger) &&
-		      dev_priv->hpd_stats[i].hpd_mark != HPD_ENABLED),
-		     "Received HPD interrupt although disabled\n");
+		WARN_ONCE(hpd[i] & hotplug_trigger &&
+			  dev_priv->hpd_stats[i].hpd_mark != HPD_ENABLED,
+			  "Received HPD interrupt although disabled\n");
 
 		if (!(hpd[i] & hotplug_trigger) ||
 		    dev_priv->hpd_stats[i].hpd_mark != HPD_ENABLED)
-- 
1.8.5.2