diff options
| -rw-r--r-- | include/linux/irq.h | 1 | ||||
| -rw-r--r-- | kernel/irq/manage.c | 4 |
2 files changed, 4 insertions, 1 deletions
diff --git a/include/linux/irq.h b/include/linux/irq.h index b2fcf330cf2e04..1df49ec7f8204b 100644 --- a/include/linux/irq.h +++ b/include/linux/irq.h @@ -41,6 +41,7 @@ #endif #define IRQ_NOPROBE 512 /* IRQ is not valid for probing */ +#define IRQ_NOREQUEST 1024 /* IRQ cannot be requested */ /** * struct hw_interrupt_type - hardware interrupt type descriptor * diff --git a/kernel/irq/manage.c b/kernel/irq/manage.c index 90a944a7fadcff..cae900a849c438 100644 --- a/kernel/irq/manage.c +++ b/kernel/irq/manage.c @@ -141,7 +141,7 @@ int can_request_irq(unsigned int irq, unsigned long irqflags) { struct irqaction *action; - if (irq >= NR_IRQS) + if (irq >= NR_IRQS || irq_desc[irq].status & IRQ_NOREQUEST) return 0; action = irq_desc[irq].action; @@ -356,6 +356,8 @@ int request_irq(unsigned int irq, return -EINVAL; if (irq >= NR_IRQS) return -EINVAL; + if (irq_desc[irq].status & IRQ_NOREQUEST) + return -EINVAL; if (!handler) return -EINVAL; |