2.6.22-stable review patch. If anyone has any objections, please let us
know.
------------------
From: Thomas Gleixner <[email protected]>
patch 2464286ace55b3abddfb9cc30ab95e2dac1de9a6 in mainline.
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 <[email protected]>
Signed-off-by: Linus Torvalds <[email protected]>
Cc: Chuck Ebbert <[email protected]>
Signed-off-by: Greg Kroah-Hartman <[email protected]>
---
kernel/irq/resend.c | 7 ++++++-
1 file changed, 6 insertions(+), 1 deletion(-)
--- a/kernel/irq/resend.c
+++ b/kernel/irq/resend.c
@@ -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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