From f2e7d8476c1c936dd5f73821a6d1dd336e50a727 Mon Sep 17 00:00:00 2001 From: Andy Gospodarek Date: Thu, 3 Apr 2008 15:20:32 -0400 Subject: [PATCH] genirq: suppress resend of level interrupts RHBZ 292051 commit 2464286ace55b3abddfb9cc30ab95e2dac1de9a6 Author: Thomas Gleixner Date: Sun Aug 12 15:46:35 2007 +0000 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: Thomas Gleixner Signed-off-by: Linus Torvalds --- kernel/irq/resend.c | 7 ++++++- 1 files changed, 6 insertions(+), 1 deletions(-) diff --git a/kernel/irq/resend.c b/kernel/irq/resend.c index 35f10f7..498d2d4 100644 --- a/kernel/irq/resend.c +++ b/kernel/irq/resend.c @@ -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 || -- 1.5.2.1