linux-kernel - [PATCH -mm 1/2] 3c59x: Fix uninitialized variable bug

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Message-ID: <alpine.LFD.0.999.0709040340250.8504@enigma.security.iitk.ac.in>
Date:	Tue, 4 Sep 2007 03:45:55 +0530 (IST)
From:	Satyam Sharma <satyam@...radead.org>
To:	Steffen Klassert <klassert@...hematik.tu-chemnitz.de>
cc:	Linux Kernel Mailing List <linux-kernel@...r.kernel.org>,
	Linux Netdev Mailing List <netdev@...r.kernel.org>,
	Jeff Garzik <jeff@...zik.org>
Subject: [PATCH -mm 1/2] 3c59x: Fix uninitialized variable bug


drivers/net/3c59x.c: In function 'vortex_up':
drivers/net/3c59x.c:1495: warning: 'err' may be used uninitialized in this function

is a genuine bug. The function returns an uninitialized value of 'err'
back to the caller, which expects it to be 0 for success cases. Let's
fix this by explicitly initializing 'err' to zero.

Signed-off-by: Satyam Sharma <satyam@...radead.org>

---

 drivers/net/3c59x.c |    3 ++-
 1 file changed, 2 insertions(+), 1 deletion(-)

--- linux-2.6.23-rc4-mm1/drivers/net/3c59x.c~fix	2007-09-04 03:29:40.000000000 +0530
+++ linux-2.6.23-rc4-mm1/drivers/net/3c59x.c	2007-09-04 03:30:08.000000000 +0530
@@ -1492,7 +1492,8 @@ vortex_up(struct net_device *dev)
 	struct vortex_private *vp = netdev_priv(dev);
 	void __iomem *ioaddr = vp->ioaddr;
 	unsigned int config;
-	int i, mii_reg1, mii_reg5, err;
+	int i, mii_reg1, mii_reg5;
+	int err = 0;
 
 	if (VORTEX_PCI(vp)) {
 		pci_set_power_state(VORTEX_PCI(vp), PCI_D0);	/* Go active */
-
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