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Commit 6550c775 authored Jun 29, 2006 by Thomas Gleixner Committed by Linus Torvalds Jun 29, 2006

[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>

parent 3418d724

include/linux/irq.h

+1 −0

Original line number	Original line	Diff line number	Diff line
	@@ -41,6 +41,7 @@
	#endif		#endif

	#define IRQ_NOPROBE 512 /* IRQ is not valid for probing */		#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		* struct hw_interrupt_type - hardware interrupt type descriptor
	*		*

kernel/irq/manage.c

+3 −1

Original line number	Original line	Diff line number	Diff line
	@@ -141,7 +141,7 @@ int can_request_irq(unsigned int irq, unsigned long irqflags)
	{		{
	struct irqaction *action;		struct irqaction *action;

	if (irq >= NR_IRQS)		if (irq >= NR_IRQS \|\| irq_desc[irq].status & IRQ_NOREQUEST)
	return 0;		return 0;

	action = irq_desc[irq].action;		action = irq_desc[irq].action;
	@@ -356,6 +356,8 @@ int request_irq(unsigned int irq,
	return -EINVAL;		return -EINVAL;
	if (irq >= NR_IRQS)		if (irq >= NR_IRQS)
	return -EINVAL;		return -EINVAL;
			if (irq_desc[irq].status & IRQ_NOREQUEST)
			return -EINVAL;
	if (!handler)		if (!handler)
	return -EINVAL;		return -EINVAL;