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Commit 2464286a authored by Thomas Gleixner's avatar Thomas Gleixner Committed by Linus Torvalds
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genirq: suppress resend of level interrupts 



Level type interrupts are resent by the interrupt hardware when they are
still active at irq_enable().

Suppress the resend mechanism for interrupts marked as level.

Signed-off-by: default avatarThomas Gleixner <tglx@linutronix.de>
Signed-off-by: default avatarLinus Torvalds <torvalds@linux-foundation.org>
parent 49663421

kernel/irq/resend.c

+6 −1
Original line number Diff line number Diff line
@@ -62,7 +62,12 @@ void check_irq_resend(struct irq_desc *desc, unsigned int irq) 
	 */

	desc->chip->enable(irq);



	if ((status & (IRQ_PENDING | IRQ_REPLAY)) == IRQ_PENDING) {

	/*

	 * We do not resend level type interrupts. Level type

	 * interrupts are resent by hardware when they are still

	 * active.

	 */

	if ((status & (IRQ_LEVEL | IRQ_PENDING | IRQ_REPLAY)) == IRQ_PENDING) {

		desc->status = (status & ~IRQ_PENDING) | IRQ_REPLAY;



		if (!desc->chip || !desc->chip->retrigger ||