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 <stable@xxxxxxxxxxxxxxx> know about it. >From a0bcbe969f564d1ec08658170dda72a1b7e9053a Mon Sep 17 00:00:00 2001 From: Pawel Moll <pawel.moll@xxxxxxx> Date: Thu, 15 Oct 2015 14:32:46 +0100 Subject: bus: arm-ccn: Fix irq affinity setting on CPU migration From: Pawel Moll <pawel.moll@xxxxxxx> 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. Signed-off-by: Pawel Moll <pawel.moll@xxxxxxx> Signed-off-by: Arnd Bergmann <arnd@xxxxxxxx> Signed-off-by: Greg Kroah-Hartman <gregkh@xxxxxxxxxxxxxxxxxxx> --- drivers/bus/arm-ccn.c | 3 ++- 1 file changed, 2 insertions(+), 1 deletion(-) --- a/drivers/bus/arm-ccn.c +++ b/drivers/bus/arm-ccn.c @@ -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 pawel.moll@xxxxxxx are queue-4.2/bus-arm-ccn-fix-irq-affinity-setting-on-cpu-migration.patch -- To unsubscribe from this list: send the line "unsubscribe stable" in the body of a message to majordomo@xxxxxxxxxxxxxxx More majordomo info at http://vger.kernel.org/majordomo-info.html