netdev - [PATCH net-next 2/8] smsc95xx: avoid memory leak in smsc95xx

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Message-ID: <8ecd274f439e642d1510780a4a5722fc72be64b4.camel@microchip.com>
Date:   Mon, 29 Jun 2020 20:15:29 +0000
From:   <Andre.Edich@...rochip.com>
To:     <netdev@...r.kernel.org>, <UNGLinuxDriver@...rochip.com>,
        <steve.glendinning@...well.net>
CC:     <Parthiban.Veerasooran@...rochip.com>
Subject: [PATCH net-next 2/8] smsc95xx: avoid memory leak in smsc95xx_bind

In a case where the ID_REV register read is failed, the memory for a
private data structure has to be freed before returning error from the
function smsc95xx_unbind.

Signed-off-by: Andre Edich <andre.edich@...rochip.com>
Signed-off-by: Parthiban Veerasooran <
Parthiban.Veerasooran@...rochip.com>
---
 drivers/net/usb/smsc95xx.c | 3 ++-
 1 file changed, 2 insertions(+), 1 deletion(-)

diff --git a/drivers/net/usb/smsc95xx.c b/drivers/net/usb/smsc95xx.c
index eb404bb74e18..bb4ccbda031a 100644
--- a/drivers/net/usb/smsc95xx.c
+++ b/drivers/net/usb/smsc95xx.c
@@ -1293,7 +1293,8 @@ static int smsc95xx_bind(struct usbnet *dev,
struct usb_interface *intf)
 	/* detect device revision as different features may be
available */
 	ret = smsc95xx_read_reg(dev, ID_REV, &val);
 	if (ret < 0)
-		return ret;
+		goto free_pdata;
+
 	val >>= 16;
 	pdata->chip_id = val;
 	pdata->mdix_ctrl = get_mdix_status(dev->net);