diff options
Diffstat (limited to 'kernel/irq')
| -rw-r--r-- | kernel/irq/ipi.c | 18 |
1 files changed, 14 insertions, 4 deletions
diff --git a/kernel/irq/ipi.c b/kernel/irq/ipi.c index 14777af8e097..bedc995ae214 100644 --- a/kernel/irq/ipi.c +++ b/kernel/irq/ipi.c @@ -106,11 +106,12 @@ free_descs: /** * irq_destroy_ipi() - unreserve an IPI that was previously allocated * @irq: linux irq number to be destroyed + * @dest: cpumask of cpus which should have the IPI removed * * Return the IPIs allocated with irq_reserve_ipi() to the system destroying * all virqs associated with them. */ -void irq_destroy_ipi(unsigned int irq) +void irq_destroy_ipi(unsigned int irq, const struct cpumask *dest) { struct irq_data *data = irq_get_irq_data(irq); struct cpumask *ipimask = data ? irq_data_get_affinity_mask(data) : NULL; @@ -129,10 +130,19 @@ void irq_destroy_ipi(unsigned int irq) return; } - if (irq_domain_is_ipi_per_cpu(domain)) - nr_irqs = cpumask_weight(ipimask); - else + if (WARN_ON(!cpumask_subset(dest, ipimask))) + /* + * Must be destroying a subset of CPUs to which this IPI + * was set up to target + */ + return; + + if (irq_domain_is_ipi_per_cpu(domain)) { + irq = irq + cpumask_first(dest) - data->common->ipi_offset; + nr_irqs = cpumask_weight(dest); + } else { nr_irqs = 1; + } irq_domain_free_irqs(irq, nr_irqs); } |