From 5a43a066b11ac2fe84cf67307f20b83bea390f83 Mon Sep 17 00:00:00 2001
From: Benjamin Herrenschmidt <benh@kernel.crashing.org>
Date: Mon, 3 Jul 2006 19:54:59 +1000
Subject: [PATCH] [PATCH] genirq: Allow fasteoi handler to retrigger disabled
interrupts
Make the fasteoi handler mark disabled interrupts as pending if they
happen anyway. This allow implementation of a delayed disable scheme
with the fasteoi handler.
Signed-off-by: Benjamin Herrenschmidt <benh@kernel.crashing.org>
Acked-by: Thomas Gleixner <tglx@linutronix.de>
Acked-by: Ingo Molnar <mingo@elte.hu>
Signed-off-by: Paul Mackerras <paulus@samba.org>
---
kernel/irq/chip.c | 5 ++++-
1 file changed, 4 insertions(+), 1 deletion(-)
diff --git a/kernel/irq/chip.c b/kernel/irq/chip.c
index 54105bdfe20d..9336f2e89e40 100644
--- a/kernel/irq/chip.c
+++ b/kernel/irq/chip.c
@@ -261,10 +261,13 @@ handle_level_irq(unsigned int irq, struct irq_desc *desc, struct pt_regs *regs)
* keep it masked and get out of here
*/
action = desc->action;
- if (unlikely(!action || (desc->status & IRQ_DISABLED)))
+ if (unlikely(!action || (desc->status & IRQ_DISABLED))) {
+ desc->status |= IRQ_PENDING;
goto out;
+ }
desc->status |= IRQ_INPROGRESS;
+ desc->status &= ~IRQ_PENDING;
spin_unlock(&desc->lock);
action_ret = handle_IRQ_event(irq, regs, action);
--
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