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 --- kernel/irq/resend.c | 7 ++++++- 1 file changed, 6 insertions(+), 1 deletion(-) Index: linux-2.6/kernel/irq/resend.c =================================================================== --- linux-2.6.orig/kernel/irq/resend.c 2007-08-12 17:18:04.000000000 +0200 +++ linux-2.6/kernel/irq/resend.c 2007-08-12 17:18:04.000000000 +0200 @@ -62,7 +62,12 @@ void check_irq_resend(struct irq_desc *d */ 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 || -- - To unsubscribe from this list: send the line "unsubscribe linux-kernel" in the body of a message to majordomo@vger.kernel.org More majordomo info at http://vger.kernel.org/majordomo-info.html Please read the FAQ at http://www.tux.org/lkml/