linux-kernel - [PATCH] genirq: use irq_mask as fallback for irq

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Message-Id: <1366378862-22359-1-git-send-email-andreas.fenkart@streamunlimited.com>
Date:	Fri, 19 Apr 2013 15:41:02 +0200
From:	Andreas Fenkart <andreas.fenkart@...eamunlimited.com>
To:	tglx@...utronix.de
Cc:	zonque@...il.com, linux-kernel@...r.kernel.org,
	Andreas Fenkart <andreas.fenkart@...eamunlimited.com>
Subject: [PATCH] genirq: use irq_mask as fallback for irq_disable.

This is in line with irq_enable that uses the same fallback.
When masked, interrupts are still latched into the status register
so when unmasked there is an interrupt straight away.

Signed-off-by: Andreas Fenkart <andreas.fenkart@...eamunlimited.com>
---
 kernel/irq/chip.c |    7 ++++---
 1 file changed, 4 insertions(+), 3 deletions(-)

diff --git a/kernel/irq/chip.c b/kernel/irq/chip.c
index cbd97ce..21f87b7 100644
--- a/kernel/irq/chip.c
+++ b/kernel/irq/chip.c
@@ -216,10 +216,11 @@ void irq_enable(struct irq_desc *desc)
 void irq_disable(struct irq_desc *desc)
 {
 	irq_state_set_disabled(desc);
-	if (desc->irq_data.chip->irq_disable) {
+	if (desc->irq_data.chip->irq_disable)
 		desc->irq_data.chip->irq_disable(&desc->irq_data);
-		irq_state_set_masked(desc);
-	}
+	else
+		desc->irq_data.chip->irq_mask(&desc->irq_data);
+	irq_state_set_masked(desc);
 }
 
 void irq_percpu_enable(struct irq_desc *desc, unsigned int cpu)
-- 
1.7.10.4

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