[PATCH] genirq: Add the IRQS_ONESHOT support for edge interrupt

From: Chuansheng Liu
Date: Mon Sep 17 2012 - 23:56:51 EST


In handle_edge_irq(), currently do not care about the flag IRQS_ONESHOT,
but there are many edge interrupt handler with irq thread need it indeed,
so implement here.

Signed-off-by: liu chuansheng <chuansheng.liu@xxxxxxxxx>
---
kernel/irq/chip.c | 8 +++++++-
1 files changed, 7 insertions(+), 1 deletions(-)

diff --git a/kernel/irq/chip.c b/kernel/irq/chip.c
index eebd6d5..8e4e49a 100644
--- a/kernel/irq/chip.c
+++ b/kernel/irq/chip.c
@@ -497,7 +497,13 @@ handle_edge_irq(unsigned int irq, struct irq_desc *desc)
kstat_incr_irqs_this_cpu(irq, desc);

/* Start handling the irq */
- desc->irq_data.chip->irq_ack(&desc->irq_data);
+ if (desc->istate & IRQS_ONESHOT) {
+ mask_ack_irq(desc);
+ handle_irq_event(desc);
+ cond_unmask_irq();
+ goto out_unlock;
+ } else
+ desc->irq_data.chip->irq_ack(&desc->irq_data);

do {
if (unlikely(!desc->action)) {
--
1.7.0.4



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