Commit 6550c775 authored by Thomas Gleixner's avatar Thomas Gleixner Committed by Linus Torvalds
Browse files

[PATCH] genirq: add IRQ_NOREQUEST support 



Enable platforms to disable request_irq() for certain interrupts.

Signed-off-by: default avatarThomas Gleixner <tglx@linutronix.de>
Signed-off-by: default avatarIngo Molnar <mingo@elte.hu>
Signed-off-by: default avatarAndrew Morton <akpm@osdl.org>
Signed-off-by: default avatarLinus Torvalds <torvalds@osdl.org>
parent 3418d724

include/linux/irq.h

+1 −0
Original line number Diff line number Diff line
@@ -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

 *

kernel/irq/manage.c

+3 −1
Original line number Diff line number Diff line
@@ -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;

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