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 <tglx@linutronix.de>
Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
diff --git a/kernel/irq/resend.c b/kernel/irq/resend.c
index 5bfeaed..a804679 100644
--- a/kernel/irq/resend.c
+++ b/kernel/irq/resend.c
@@ -62,7 +62,12 @@
*/
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 ||
