From: Byungchul Park <[email protected]> This patch ensures that the cpu being offlined is not present in the affinity mask.
Signed-off-by: Byungchul Park <[email protected]> --- arch/arm64/kernel/irq.c | 9 +++++++++ 1 file changed, 9 insertions(+) diff --git a/arch/arm64/kernel/irq.c b/arch/arm64/kernel/irq.c index 473e5db..0c7b79e 100644 --- a/arch/arm64/kernel/irq.c +++ b/arch/arm64/kernel/irq.c @@ -87,6 +87,7 @@ static bool migrate_one_irq(struct irq_desc *desc) { struct irq_data *d = irq_desc_get_irq_data(desc); const struct cpumask *affinity = d->affinity; + struct cpumask tmp_affinity; struct irq_chip *c; bool ret = false; @@ -100,6 +101,14 @@ static bool migrate_one_irq(struct irq_desc *desc) if (cpumask_any_and(affinity, cpu_online_mask) >= nr_cpu_ids) { affinity = cpu_online_mask; ret = true; + } else { + /* + * when using forced irq_set_affinity we must ensure that the cpu + * being offlined is not present in the affinity mask, it may be + * selected as the target CPU otherwise + */ + cpumask_and(&tmp_affinity, affinity, cpu_online_mask); + affinity = &tmp_affinity; } c = irq_data_get_irq_chip(d); -- 1.7.9.5 -- To unsubscribe from this list: send the line "unsubscribe linux-kernel" in the body of a message to [email protected] More majordomo info at http://vger.kernel.org/majordomo-info.html Please read the FAQ at http://www.tux.org/lkml/
