linux-kernel - [PATCH 1/4 next] net: lan78xx: Bail out if lan78xx_get

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Message-Id: <1535994759-8938-2-git-send-email-stefan.wahren@i2se.com>
Date:   Mon,  3 Sep 2018 19:12:36 +0200
From:   Stefan Wahren <stefan.wahren@...e.com>
To:     Woojung Huh <woojung.huh@...rochip.com>
Cc:     Microchip Linux Driver Support <UNGLinuxDriver@...rochip.com>,
        "David S. Miller" <davem@...emloft.net>, netdev@...r.kernel.org,
        linux-usb@...r.kernel.org, linux-kernel@...r.kernel.org,
        Stefan Wahren <stefan.wahren@...e.com>
Subject: [PATCH 1/4 next] net: lan78xx: Bail out if lan78xx_get_endpoints fails

We need to bail out if lan78xx_get_endpoints() fails, otherwise the
result is overwritten.

Fixes: 55d7de9de6c3 ("Microchip's LAN7800 family USB 2/3 to 10/100/1000 Ethernet")
Signed-off-by: Stefan Wahren <stefan.wahren@...e.com>
---
 drivers/net/usb/lan78xx.c | 5 +++++
 1 file changed, 5 insertions(+)

diff --git a/drivers/net/usb/lan78xx.c b/drivers/net/usb/lan78xx.c
index a9991c5..3f70b94 100644
--- a/drivers/net/usb/lan78xx.c
+++ b/drivers/net/usb/lan78xx.c
@@ -2952,6 +2952,11 @@ static int lan78xx_bind(struct lan78xx_net *dev, struct usb_interface *intf)
 	int i;
 
 	ret = lan78xx_get_endpoints(dev, intf);
+	if (ret) {
+		netdev_warn(dev->net, "lan78xx_get_endpoints failed: %d\n",
+			    ret);
+		return ret;
+	}
 
 	dev->data[0] = (unsigned long)kzalloc(sizeof(*pdata), GFP_KERNEL);
 
-- 
2.7.4