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| author | Thomas Gleixner <tglx@linutronix.de> | 2006-06-29 02:24:49 -0700 |
|---|---|---|
| committer | Linus Torvalds <torvalds@g5.osdl.org> | 2006-06-29 10:26:24 -0700 |
| commit | 6550c775cb5ee94c132d93d84de3bb23f0abf37b (patch) | |
| tree | 818ae46cfe30265bbecc095262de53e9c8dcb012 | |
| parent | 3418d72404e35eb19e7995cbf3e7a76ba8fefbce (diff) | |
| download | op-kernel-dev-6550c775cb5ee94c132d93d84de3bb23f0abf37b.zip op-kernel-dev-6550c775cb5ee94c132d93d84de3bb23f0abf37b.tar.gz | |
[PATCH] genirq: add IRQ_NOREQUEST support
Enable platforms to disable request_irq() for certain interrupts.
Signed-off-by: Thomas Gleixner <tglx@linutronix.de>
Signed-off-by: Ingo Molnar <mingo@elte.hu>
Signed-off-by: Andrew Morton <akpm@osdl.org>
Signed-off-by: Linus Torvalds <torvalds@osdl.org>
| -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 b2fcf33..1df49ec 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 90a944a..cae900a 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; |
