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authorThomas Gleixner <tglx@linutronix.de>2017-06-20 01:37:28 +0200
committerThomas Gleixner <tglx@linutronix.de>2017-06-22 18:21:17 +0200
commit91f26cb4cd3c22bd656ab46c49329aacaaab5504 (patch)
tree636371299799ff5d8c5a2a324081e9f60e9ae31a /kernel/irq/cpuhotplug.c
parente8a7035039306c90bcc99129ffc18e0be052bbb9 (diff)
downloadlinux-stericsson-91f26cb4cd3c22bd656ab46c49329aacaaab5504.tar.gz
genirq/cpuhotplug: Do not migrated shutdown irqs
Interrupts, which are shut down are tried to be migrated as well. That's pointless because the interrupt cannot fire and the next startup will move it to the proper place anyway. Signed-off-by: Thomas Gleixner <tglx@linutronix.de> Cc: Jens Axboe <axboe@kernel.dk> Cc: Marc Zyngier <marc.zyngier@arm.com> Cc: Michael Ellerman <mpe@ellerman.id.au> Cc: Keith Busch <keith.busch@intel.com> Cc: Peter Zijlstra <peterz@infradead.org> Cc: Christoph Hellwig <hch@lst.de> Link: http://lkml.kernel.org/r/20170619235445.447550992@linutronix.de
Diffstat (limited to 'kernel/irq/cpuhotplug.c')
-rw-r--r--kernel/irq/cpuhotplug.c11
1 files changed, 8 insertions, 3 deletions
diff --git a/kernel/irq/cpuhotplug.c b/kernel/irq/cpuhotplug.c
index 41fe1e04d5d9..09b20e127aee 100644
--- a/kernel/irq/cpuhotplug.c
+++ b/kernel/irq/cpuhotplug.c
@@ -33,10 +33,15 @@ static bool migrate_one_irq(struct irq_desc *desc)
}
/*
- * If this is a per-CPU interrupt, or the affinity does not
- * include this CPU, then we have nothing to do.
+ * No move required, if:
+ * - Interrupt is per cpu
+ * - Interrupt is not started
+ * - Affinity mask does not include this CPU.
+ *
+ * Note: Do not check desc->action as this might be a chained
+ * interrupt.
*/
- if (irqd_is_per_cpu(d) ||
+ if (irqd_is_per_cpu(d) || !irqd_is_started(d) ||
!cpumask_test_cpu(smp_processor_id(), affinity))
return false;