diff options
Diffstat (limited to 'kernel/irq/cpuhotplug.c')
| -rw-r--r-- | kernel/irq/cpuhotplug.c | 14 |
1 files changed, 13 insertions, 1 deletions
diff --git a/kernel/irq/cpuhotplug.c b/kernel/irq/cpuhotplug.c index 011f8c4c63da..dac3724e4c1e 100644 --- a/kernel/irq/cpuhotplug.c +++ b/kernel/irq/cpuhotplug.c @@ -11,6 +11,7 @@ #include <linux/interrupt.h> #include <linux/ratelimit.h> #include <linux/irq.h> +#include <linux/cpumask.h> #include "internals.h" @@ -20,6 +21,7 @@ static bool migrate_one_irq(struct irq_desc *desc) const struct cpumask *affinity = d->common->affinity; struct irq_chip *c; bool ret = false; + struct cpumask available_cpus; /* * If this is a per-CPU interrupt, or the affinity does not @@ -29,8 +31,15 @@ static bool migrate_one_irq(struct irq_desc *desc) !cpumask_test_cpu(smp_processor_id(), affinity)) return false; + cpumask_copy(&available_cpus, affinity); + cpumask_andnot(&available_cpus, &available_cpus, cpu_isolated_mask); + affinity = &available_cpus; + if (cpumask_any_and(affinity, cpu_online_mask) >= nr_cpu_ids) { - affinity = cpu_online_mask; + cpumask_andnot(&available_cpus, cpu_online_mask, + cpu_isolated_mask); + if (cpumask_empty(affinity)) + affinity = cpu_online_mask; ret = true; } @@ -69,6 +78,9 @@ void irq_migrate_all_off_this_cpu(void) bool affinity_broken; desc = irq_to_desc(irq); + if (!desc) + continue; + raw_spin_lock(&desc->lock); affinity_broken = migrate_one_irq(desc); raw_spin_unlock(&desc->lock); |