netdev - [patch] usbnet/smsc75xx: silence uninitialized variable warning

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Date:	Wed, 4 May 2016 09:21:02 +0300
From:	Dan Carpenter <dan.carpenter@...cle.com>
To:	Steve Glendinning <steve.glendinning@...well.net>
Cc:	netdev@...r.kernel.org, linux-usb@...r.kernel.org
Subject: [patch] usbnet/smsc75xx: silence uninitialized variable warning

If the fn() calls fail then "buf" is uninitialized.  Just return early
in that situation.

Signed-off-by: Dan Carpenter <dan.carpenter@...cle.com>

diff --git a/drivers/net/usb/smsc75xx.c b/drivers/net/usb/smsc75xx.c
index c369db9..9af9799 100644
--- a/drivers/net/usb/smsc75xx.c
+++ b/drivers/net/usb/smsc75xx.c
@@ -99,9 +99,11 @@ static int __must_check __smsc75xx_read_reg(struct usbnet *dev, u32 index,
 	ret = fn(dev, USB_VENDOR_REQUEST_READ_REGISTER, USB_DIR_IN
 		 | USB_TYPE_VENDOR | USB_RECIP_DEVICE,
 		 0, index, &buf, 4);
-	if (unlikely(ret < 0))
+	if (unlikely(ret < 0)) {
 		netdev_warn(dev->net, "Failed to read reg index 0x%08x: %d\n",
 			    index, ret);
+		return ret;
+	}
 
 	le32_to_cpus(&buf);
 	*data = buf;