netdev - [patch 06/13] Fix a potential NULL pointer dereference in uli526x_interrupt() in drivers/net/tulip/uli526x.c

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Message-Id: <200710022111.l92LBcIs022492@imap1.linux-foundation.org>
Date:	Tue, 02 Oct 2007 14:11:38 -0700
From:	akpm@...ux-foundation.org
To:	jeff@...zik.org
Cc:	netdev@...r.kernel.org, akpm@...ux-foundation.org,
	micah.gruber@...il.com, grundler@...isc-linux.org, kyle@...artin.ca
Subject: [patch 06/13] Fix a potential NULL pointer dereference in uli526x_interrupt() in drivers/net/tulip/uli526x.c

From: Micah Gruber <micah.gruber@...il.com>

This patch fixes an apparent potential null dereference bug where we
dereference dev before a null check.  This patch simply remvoes the
can't-happen test for a null pointer.

Signed-off-by: Micah Gruber <micah.gruber@...il.com>
Cc: Grant Grundler <grundler@...isc-linux.org>
Acked-by: Jeff Garzik <jeff@...zik.org>
Acked-by: Kyle McMartin <kyle@...artin.ca>
Signed-off-by: Andrew Morton <akpm@...ux-foundation.org>
---

 drivers/net/tulip/uli526x.c |    5 -----
 1 file changed, 5 deletions(-)

diff -puN drivers/net/tulip/uli526x.c~fix-a-potential-null-pointer-dereference-in-uli526x_interrupt drivers/net/tulip/uli526x.c
--- a/drivers/net/tulip/uli526x.c~fix-a-potential-null-pointer-dereference-in-uli526x_interrupt
+++ a/drivers/net/tulip/uli526x.c
@@ -664,11 +664,6 @@ static irqreturn_t uli526x_interrupt(int
 	unsigned long ioaddr = dev->base_addr;
 	unsigned long flags;
 
-	if (!dev) {
-		ULI526X_DBUG(1, "uli526x_interrupt() without DEVICE arg", 0);
-		return IRQ_NONE;
-	}
-
 	spin_lock_irqsave(&db->lock, flags);
 	outl(0, ioaddr + DCR7);
 
_
-
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