diff options
Diffstat (limited to 'kernel/irq/manage.c')
| -rw-r--r-- | kernel/irq/manage.c | 16 |
1 files changed, 16 insertions, 0 deletions
diff --git a/kernel/irq/manage.c b/kernel/irq/manage.c index 1cfdb08ddf20..81c49a4d679e 100644 --- a/kernel/irq/manage.c +++ b/kernel/irq/manage.c @@ -24,6 +24,7 @@ cpumask_t __cacheline_aligned pending_irq_cpumask[NR_IRQS]; /** * synchronize_irq - wait for pending IRQ handlers (on other CPUs) + * @irq: interrupt number to wait for * * This function waits for any pending IRQ handlers for this interrupt * to complete before returning. If you use this function while @@ -35,6 +36,9 @@ void synchronize_irq(unsigned int irq) { struct irq_desc *desc = irq_desc + irq; + if (irq >= NR_IRQS) + return; + while (desc->status & IRQ_INPROGRESS) cpu_relax(); } @@ -59,6 +63,9 @@ void disable_irq_nosync(unsigned int irq) irq_desc_t *desc = irq_desc + irq; unsigned long flags; + if (irq >= NR_IRQS) + return; + spin_lock_irqsave(&desc->lock, flags); if (!desc->depth++) { desc->status |= IRQ_DISABLED; @@ -85,6 +92,9 @@ void disable_irq(unsigned int irq) { irq_desc_t *desc = irq_desc + irq; + if (irq >= NR_IRQS) + return; + disable_irq_nosync(irq); if (desc->action) synchronize_irq(irq); @@ -107,6 +117,9 @@ void enable_irq(unsigned int irq) irq_desc_t *desc = irq_desc + irq; unsigned long flags; + if (irq >= NR_IRQS) + return; + spin_lock_irqsave(&desc->lock, flags); switch (desc->depth) { case 0: @@ -162,6 +175,9 @@ int setup_irq(unsigned int irq, struct irqaction * new) unsigned long flags; int shared = 0; + if (irq >= NR_IRQS) + return -EINVAL; + if (desc->handler == &no_irq_type) return -ENOSYS; /* |