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Commit 94d39e1f authored by Thomas Gleixner's avatar Thomas Gleixner Committed by Linus Torvalds
Browse files

[PATCH] genirq: add IRQ_NOAUTOEN support 



Enable platforms to disable the automatic enabling of freshly set up irqs.

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 6550c775

include/linux/irq.h

+1 −0
Original line number Diff line number Diff line
@@ -42,6 +42,7 @@ 


#define IRQ_NOPROBE	512	/* IRQ is not valid for probing */

#define IRQ_NOREQUEST	1024	/* IRQ cannot be requested */

#define IRQ_NOAUTOEN	2048	/* IRQ will not be enabled on request irq */

/**

 * struct hw_interrupt_type - hardware interrupt type descriptor

 *

kernel/irq/handle.c

+1 −0
Original line number Diff line number Diff line
@@ -32,6 +32,7 @@ struct irq_desc irq_desc[NR_IRQS] __cacheline_aligned = { 
	[0 ... NR_IRQS-1] = {

		.status = IRQ_DISABLED,

		.chip = &no_irq_type,

		.depth = 1,

		.lock = SPIN_LOCK_UNLOCKED,

#ifdef CONFIG_SMP

		.affinity = CPU_MASK_ALL

kernel/irq/manage.c

+11 −7
Original line number Diff line number Diff line
@@ -216,14 +216,18 @@ int setup_irq(unsigned int irq, struct irqaction *new) 
		desc->status |= IRQ_PER_CPU;

#endif

	if (!shared) {

		desc->status &= ~(IRQ_AUTODETECT | IRQ_WAITING |

				  IRQ_INPROGRESS);



		if (!(desc->status & IRQ_NOAUTOEN)) {

			desc->depth = 0;

		desc->status &= ~(IRQ_DISABLED | IRQ_AUTODETECT |

				  IRQ_WAITING | IRQ_INPROGRESS);

			desc->status &= ~IRQ_DISABLED;

			if (desc->chip->startup)

				desc->chip->startup(irq);

			else

				desc->chip->enable(irq);

		}

	}

	spin_unlock_irqrestore(&desc->lock, flags);



	new->irq = irq;