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

[Yong Zhang <yong.zhang0@gmail.com>]

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@gmail.com>
Cc: Ingo Molnar <mingo@elte.hu>
Cc: Thomas Gleixner <tglx@linutronix.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