Patch "drm/i915: Never fully mask the the EI up rps interrupt on SNB/IVB" has been added to the 4.7-stable tree

This is a note to let you know that I've just added the patch titled

drm/i915: Never fully mask the the EI up rps interrupt on SNB/IVB

to the 4.7-stable tree which can be found at:
http://www.kernel.org/git/?p=linux/kernel/git/stable/stable-queue.git;a=summary

The filename of the patch is:
drm-i915-never-fully-mask-the-the-ei-up-rps-interrupt-on-snb-ivb.patch
and it can be found in the queue-4.7 subdirectory.

If you, or anyone else, feels it should not be added to the stable tree, please let <[email protected]> know about it.

From: =?UTF-8?q?Ville=20Syrj=C3=A4l=C3=A4?= <[email protected]>
Date: Mon, 23 May 2016 17:42:48 +0300
Subject: drm/i915: Never fully mask the the EI up rps interrupt on SNB/IVB
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From: Ville Syrjälä <[email protected]>

commit a7b4667a00025ac28300737c868bd4818b6d8c4d upstream.

SNB (and IVB too I suppose) starts to misbehave if the GPU gets stuck in an infinite batch buffer loop. The GPU apparently hogs something critical and CPUs start to lose interrupts and whatnot. We can keep the system limping along by unmasking some interrupts in GEN6_PMINTRMSK. The EI up interrupt has been previously chosen for that task, so let's never mask it.

v2: s/gen6_rps_pm_mask/gen6_sanitize_rps_pm_mask/ (Chris)

Bugzilla: https://bugs.freedesktop.org/show_bug.cgi?id=93122

---
 drivers/gpu/drm/i915/intel_pm.c |    3 ++-
 1 file changed, 2 insertions(+), 1 deletion(-)

@@ -4563,7 +4563,8 @@ void gen6_rps_idle(struct drm_i915_priva
 		else
 			gen6_set_rps(dev_priv->dev, dev_priv->rps.idle_freq);
 		dev_priv->rps.last_adj = 0;
-		I915_WRITE(GEN6_PMINTRMSK, 0xffffffff);
+		I915_WRITE(GEN6_PMINTRMSK,
+			   gen6_sanitize_rps_pm_mask(dev_priv, ~0));
 	}
 	mutex_unlock(&dev_priv->rps.hw_lock);
 

Patches currently in stable-queue which might be from [email protected] are

queue-4.7/drm-edid-add-6-bpc-quirk-for-display-aeo-model-0.patch queue-4.7/drm-i915-never-fully-mask-the-the-ei-up-rps-interrupt-on-snb-ivb.patch queue-4.7/drm-aux-transfer-can-return-0-deal-with-it.patch queue-4.7/drm-i915-update-cdclk_freq-register-on-bdw-after-changing-cdclk-frequency.patch queue-4.7/drm-i915-dp-revert-drm-i915-dp-fall-back-to-18-bpp-when-sink-capability-is-unknown.patch