smsc95xx: avoid memory leak in smsc95xx_bind

BugLink: https://bugs.launchpad.net/bugs/1888690

[ Upstream commit 3ed58f96 ]

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_bind.

Fixes: bbd9f9ee ("smsc95xx: add wol support for more frame types")
Signed-off-by: Andre Edich <andre.edich@microchip.com>
Signed-off-by: Parthiban Veerasooran <Parthiban.Veerasooran@microchip.com>
Signed-off-by: David S. Miller <davem@davemloft.net>
Signed-off-by: Sasha Levin <sashal@kernel.org>
Signed-off-by: Kamal Mostafa <kamal@canonical.com>
Signed-off-by: Khalid Elmously <khalid.elmously@canonical.com>

drivers/net/usb/smsc95xx.c

@@ -1142,7 +1142,8 @@ 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;
 
 	if ((val == ID_REV_CHIP_ID_9500A_) || (val == ID_REV_CHIP_ID_9530_) ||