linux-kernel - [PATCH 1/3] genirq: omit validate of desc->chip->shutdown

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Date:	Wed,  4 Nov 2009 21:20:39 +0800
From:	Yong Zhang <yong.zhang0@...il.com>
To:	linux-kernel@...r.kernel.org
Cc:	Ingo Molnar <mingo@...e.hu>, Thomas Gleixner <tglx@...utronix.de>
Subject: [PATCH 1/3] genirq: omit validate of desc->chip->shutdown

Because irq_chip_set_defaults() will do the init things, chip->shutdown
can't be NULL then the validate of it is redundant.

Signed-off-by: Yong Zhang <yong.zhang0@...il.com>
Cc: Ingo Molnar <mingo@...e.hu>
Cc: Thomas Gleixner <tglx@...utronix.de>
---
 kernel/irq/manage.c |    5 +----
 1 files changed, 1 insertions(+), 4 deletions(-)

diff --git a/kernel/irq/manage.c b/kernel/irq/manage.c
index bde4c66..0b5e5ed 100644
--- a/kernel/irq/manage.c
+++ b/kernel/irq/manage.c
@@ -878,10 +878,7 @@ static struct irqaction *__free_irq(unsigned int irq, void *dev_id)
 	/* If this was the last handler, shut down the IRQ line: */
 	if (!desc->action) {
 		desc->status |= IRQ_DISABLED;
-		if (desc->chip->shutdown)
-			desc->chip->shutdown(irq);
-		else
-			desc->chip->disable(irq);
+		desc->chip->shutdown(irq);
 	}
 
 	spin_unlock_irqrestore(&desc->lock, flags);
-- 
1.6.3.3

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