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Groups > linux.kernel > #1264475
| From | Greg Kroah-Hartman <gregkh@linuxfoundation.org> |
|---|---|
| Newsgroups | linux.kernel |
| Subject | [PATCH 4.2 036/110] bus: arm-ccn: Fix irq affinity setting on CPU migration |
| Date | 2015-11-06 21:40 +0100 |
| Message-ID | <qrVXJ-V4-41@gated-at.bofh.it> (permalink) |
| References | <qrURY-d0-7@gated-at.bofh.it> |
| Organization | linux.* mail to news gateway |
4.2-stable review patch. If anyone has any objections, please let me know. ------------------ From: Pawel Moll <pawel.moll@arm.com> 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@arm.com> Signed-off-by: Arnd Bergmann <arnd@arndb.de> Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org> --- 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; } -- To unsubscribe from this list: send the line "unsubscribe linux-kernel" in the body of a message to majordomo@vger.kernel.org More majordomo info at http://vger.kernel.org/majordomo-info.html Please read the FAQ at http://www.tux.org/lkml/
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[PATCH 4.2 036/110] bus: arm-ccn: Fix irq affinity setting on CPU migration Greg Kroah-Hartman <gregkh@linuxfoundation.org> - 2015-11-06 21:40 +0100
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