smsc75xx: check return code from smsc75xx_reset

This patch adds a missing check and error message if smsc75xx_reset
fails.

Signed-off-by: Steve Glendinning <steve.glendinning@shawell.net>
Signed-off-by: David S. Miller <davem@davemloft.net>
diff --git a/drivers/net/usb/smsc75xx.c b/drivers/net/usb/smsc75xx.c
index 953c4f4..a36648b 100644
--- a/drivers/net/usb/smsc75xx.c
+++ b/drivers/net/usb/smsc75xx.c
@@ -1163,6 +1163,7 @@
 
 	/* Init all registers */
 	ret = smsc75xx_reset(dev);
+	check_warn_return(ret, "smsc75xx_reset error %d\n", ret);
 
 	dev->net->netdev_ops = &smsc75xx_netdev_ops;
 	dev->net->ethtool_ops = &smsc75xx_ethtool_ops;