ethtool: fix drvinfo strings set in drivers

Use strlcpy where possible to ensure the string is \0 terminated.
Use always sizeof(string) instead of 32, ETHTOOL_BUSINFO_LEN
and custom defines.
Use snprintf instead of sprint.
Remove unnecessary inits of ->fw_version
Remove unnecessary inits of drvinfo struct.

Signed-off-by: Jiri Pirko <jiri@resnulli.us>
Signed-off-by: David S. Miller <davem@davemloft.net>

drivers/s390/net/qeth_core_main.c

@@ -5444,17 +5444,14 @@ void qeth_core_get_drvinfo(struct net_device *dev,
 		struct ethtool_drvinfo *info)
 {
 	struct qeth_card *card = dev->ml_priv;
-	if (card->options.layer2)
-		strcpy(info->driver, "qeth_l2");
-	else
-		strcpy(info->driver, "qeth_l3");
 
-	strcpy(info->version, "1.0");
-	strcpy(info->fw_version, card->info.mcl_level);
-	sprintf(info->bus_info, "%s/%s/%s",
-			CARD_RDEV_ID(card),
-			CARD_WDEV_ID(card),
-			CARD_DDEV_ID(card));
+	strlcpy(info->driver, card->options.layer2 ? "qeth_l2" : "qeth_l3",
+		sizeof(info->driver));
+	strlcpy(info->version, "1.0", sizeof(info->version));
+	strlcpy(info->fw_version, card->info.mcl_level,
+		sizeof(info->fw_version));
+	snprintf(info->bus_info, sizeof(info->bus_info), "%s/%s/%s",
+		 CARD_RDEV_ID(card), CARD_WDEV_ID(card), CARD_DDEV_ID(card));
 }
 EXPORT_SYMBOL_GPL(qeth_core_get_drvinfo);