Patch "bus: arm-ccn: Fix irq affinity setting on CPU migration" has been added to the 4.2-stable tree

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

bus: arm-ccn: Fix irq affinity setting on CPU migration

to the 4.2-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:
bus-arm-ccn-fix-irq-affinity-setting-on-cpu-migration.patch
and it can be found in the queue-4.2 subdirectory.

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

From: Pawel Moll <[email protected]>
Date: Thu, 15 Oct 2015 14:32:46 +0100
Subject: bus: arm-ccn: Fix irq affinity setting on CPU migration

From: Pawel Moll <[email protected]>

commit a0bcbe969f564d1ec08658170dda72a1b7e9053a upstream.

When PMU context is migrating between CPUs, interrupt affinity is set as well. Only this should not happen when the CCN interrupt is not being used at all (the driver is using a hrtimer tick instead).

Fixed now.

---
 drivers/bus/arm-ccn.c |    3 ++-
 1 file changed, 2 insertions(+), 1 deletion(-)

@@ -1188,7 +1188,8 @@ static int arm_ccn_pmu_cpu_notifier(stru
 			break;
 		perf_pmu_migrate_context(&dt->pmu, cpu, target);
 		cpumask_set_cpu(target, &dt->cpu);
-		WARN_ON(irq_set_affinity(ccn->irq, &dt->cpu) != 0);
+		if (ccn->irq)
+			WARN_ON(irq_set_affinity(ccn->irq, &dt->cpu) != 0);
 	default:
 		break;
 	}

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

queue-4.2/bus-arm-ccn-fix-irq-affinity-setting-on-cpu-migration.patch