From: Yang Yingliang <[email protected]>
When cpu is disabled, all irqs will be migratged to another cpu.
In some cases, a new affinity is different, it needed to be coppied
to irq's affinity. But if the type of irq is LPI, it's affinity will
not be coppied because of irq_set_affinity's return value.
So copy the affinity, when the return value is IRQ_SET_MASK_OK_DONE.
Cc: Jiang Liu <[email protected]>
Cc: Thomas Gleixner <[email protected]>
Cc: Marc Zyngier <[email protected]>
Cc: Mark Rutland <[email protected]>
Cc: Will Deacon <[email protected]>
---
arch/arm64/kernel/irq.c | 9 ++++++---
1 file changed, 6 insertions(+), 3 deletions(-)
diff --git a/arch/arm64/kernel/irq.c b/arch/arm64/kernel/irq.c
index 463fa2e..2acc8ec 100644
--- a/arch/arm64/kernel/irq.c
+++ b/arch/arm64/kernel/irq.c
@@ -78,10 +78,13 @@ static bool migrate_one_irq(struct irq_desc *desc)
}
c = irq_data_get_irq_chip(d);
- if (!c->irq_set_affinity)
+ if (!c->irq_set_affinity) {
pr_debug("IRQ%u: unable to set affinity\n", d->irq);
- else if (c->irq_set_affinity(d, affinity, false) == IRQ_SET_MASK_OK &&
ret)
- cpumask_copy(irq_data_get_affinity_mask(d), affinity);
+ } else if (c->irq_set_affinity(d, affinity, false) == IRQ_SET_MASK_OK
&& ret) {
+ int r = c->irq_set_affinity(d, affinity, false);
+ if ((r == IRQ_SET_MASK_OK || r == IRQ_SET_MASK_OK_DONE) && ret)
+ cpumask_copy(irq_data_get_affinity_mask(d), affinity);
+ }
return ret;
}
--
2.5.0
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