From: Thomas Gleixner Date: Sun, 12 Aug 2007 15:46:35 +0000 (+0000) Subject: genirq: suppress resend of level interrupts X-Git-Tag: v2.6.23-rc3~3 X-Git-Url: https://err.no/cgi-bin/gitweb.cgi?a=commitdiff_plain;h=2464286ace55b3abddfb9cc30ab95e2dac1de9a6;p=linux-2.6 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 --- diff --git a/kernel/irq/resend.c b/kernel/irq/resend.c index 5bfeaed7e4..a8046791ba 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 ||