Messages in this thread Patch in this message | | | Date | Sun, 12 Aug 2007 15:46:35 -0000 | From | Thomas Gleixner <> | Subject | [patch 2/3] genirq: suppress resend of level interrupts |
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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 <tglx@linutronix.de>
--- 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 || --
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