From: Pan Bian <bianpan2016@163.com>
Date: Sat, 3 Dec 2016 11:24:48 +0000 (+0800)
Subject: net: usb: set error code when usb_alloc_urb fails
X-Git-Url: http://git.lede-project.org./?a=commitdiff_plain;h=51920830d9d0eb617af18dc60443fcd4fb50a533;p=openwrt%2Fstaging%2Fblogic.git

net: usb: set error code when usb_alloc_urb fails

In function lan78xx_probe(), variable ret takes the errno code on
failures. However, when the call to usb_alloc_urb() fails, its value
will keeps 0. 0 indicates success in the context, which is inconsistent
with the execution result. This patch fixes the bug, assigning
"-ENOMEM" to ret when usb_alloc_urb() returns a NULL pointer.

Bugzilla: https://bugzilla.kernel.org/show_bug.cgi?id=188771

Signed-off-by: Pan Bian <bianpan2016@163.com>
Acked-by: Woojung Huh <woojung.huh@microchip.com>
Signed-off-by: David S. Miller <davem@davemloft.net>
---

diff --git a/drivers/net/usb/lan78xx.c b/drivers/net/usb/lan78xx.c
index db558b8b32fe..f33460cec79f 100644
--- a/drivers/net/usb/lan78xx.c
+++ b/drivers/net/usb/lan78xx.c
@@ -3395,6 +3395,7 @@ static int lan78xx_probe(struct usb_interface *intf,
 	if (buf) {
 		dev->urb_intr = usb_alloc_urb(0, GFP_KERNEL);
 		if (!dev->urb_intr) {
+			ret = -ENOMEM;
 			kfree(buf);
 			goto out3;
 		} else {