linux-kernel - [PATCH 4.19 28/58] smsc95xx: check return value of smsc95xx

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Date:   Tue, 14 Jul 2020 20:44:01 +0200
From:   Greg Kroah-Hartman <gregkh@...uxfoundation.org>
To:     linux-kernel@...r.kernel.org
Cc:     Greg Kroah-Hartman <gregkh@...uxfoundation.org>,
        stable@...r.kernel.org, Andre Edich <andre.edich@...rochip.com>,
        Parthiban Veerasooran <Parthiban.Veerasooran@...rochip.com>,
        "David S. Miller" <davem@...emloft.net>,
        Sasha Levin <sashal@...nel.org>
Subject: [PATCH 4.19 28/58] smsc95xx: check return value of smsc95xx_reset

From: Andre Edich <andre.edich@...rochip.com>

[ Upstream commit 7c8b1e855f94f88a0c569be6309fc8d5c8844cd1 ]

The return value of the function smsc95xx_reset() must be checked
to avoid returning false success from the function smsc95xx_bind().

Fixes: 2f7ca802bdae2 ("net: Add SMSC LAN9500 USB2.0 10/100 ethernet adapter driver")
Signed-off-by: Andre Edich <andre.edich@...rochip.com>
Signed-off-by: Parthiban Veerasooran <Parthiban.Veerasooran@...rochip.com>
Signed-off-by: David S. Miller <davem@...emloft.net>
Signed-off-by: Sasha Levin <sashal@...nel.org>
---
 drivers/net/usb/smsc95xx.c | 6 ++++++
 1 file changed, 6 insertions(+)

diff --git a/drivers/net/usb/smsc95xx.c b/drivers/net/usb/smsc95xx.c
index c3389bd87c654..145ee4a02a8a5 100644
--- a/drivers/net/usb/smsc95xx.c
+++ b/drivers/net/usb/smsc95xx.c
@@ -1301,6 +1301,8 @@ static int smsc95xx_bind(struct usbnet *dev, struct usb_interface *intf)
 
 	/* Init all registers */
 	ret = smsc95xx_reset(dev);
+	if (ret)
+		goto free_pdata;
 
 	/* detect device revision as different features may be available */
 	ret = smsc95xx_read_reg(dev, ID_REV, &val);
@@ -1331,6 +1333,10 @@ static int smsc95xx_bind(struct usbnet *dev, struct usb_interface *intf)
 	schedule_delayed_work(&pdata->carrier_check, CARRIER_CHECK_DELAY);
 
 	return 0;
+
+free_pdata:
+	kfree(pdata);
+	return ret;
 }
 
 static void smsc95xx_unbind(struct usbnet *dev, struct usb_interface *intf)
-- 
2.25.1