linux-kernel - [PATCH] irq: remove superfluous NULL pointer check in check_irq

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Message-Id: <200908062146.03638.bzolnier@gmail.com>
Date:	Thu, 6 Aug 2009 21:46:03 +0200
From:	Bartlomiej Zolnierkiewicz <bzolnier@...il.com>
To:	Ingo Molnar <mingo@...e.hu>
Cc:	Dan Carpenter <error27@...il.com>,
	Jonathan Corbet <corbet@....net>, Eugene Teo <eteo@...hat.com>,
	Julia Lawall <julia@...u.dk>, linux-kernel@...r.kernel.org
Subject: [PATCH] irq: remove superfluous NULL pointer check in check_irq_resend()

From: Bartlomiej Zolnierkiewicz <bzolnier@...il.com>
Subject: [PATCH] irq: remove superfluous NULL pointer check in check_irq_resend()

This takes care of the following entry from Dan's list:

kernel/irq/resend.c +73 check_irq_resend(17) warning: variable derefenced before check 'desc->chip'

Reported-by: Dan Carpenter <error27@...il.com>
Cc: Jonathan Corbet <corbet@....net>
Cc: Eugene Teo <eteo@...hat.com>
Cc: Julia Lawall <julia@...u.dk>
Signed-off-by: Bartlomiej Zolnierkiewicz <bzolnier@...il.com>
---
 kernel/irq/resend.c |    3 +--
 1 file changed, 1 insertion(+), 2 deletions(-)

Index: b/kernel/irq/resend.c
===================================================================
--- a/kernel/irq/resend.c
+++ b/kernel/irq/resend.c
@@ -70,8 +70,7 @@ void check_irq_resend(struct irq_desc *d
 	if ((status & (IRQ_LEVEL | IRQ_PENDING | IRQ_REPLAY)) == IRQ_PENDING) {
 		desc->status = (status & ~IRQ_PENDING) | IRQ_REPLAY;
 
-		if (!desc->chip || !desc->chip->retrigger ||
-					!desc->chip->retrigger(irq)) {
+		if (!desc->chip->retrigger || !desc->chip->retrigger(irq)) {
 #ifdef CONFIG_HARDIRQS_SW_RESEND
 			/* Set it pending and activate the softirq: */
 			set_bit(irq, irqs_resend);
--
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