From bde3b0fd8055bf2c00fd20a4e3d65e920c15b443 Mon Sep 17 00:00:00 2001
From: Tonghao Zhang <xiangxia.m.yue@gmail.com>
Date: Fri, 26 Nov 2021 00:30:49 +0800
Subject: [PATCH] net: ethtool: set a default driver name

The netdev (e.g. ifb, bareudp), which not support ethtool ops
(e.g. .get_drvinfo), we can use the rtnl kind as a default name.

ifb netdev may be created by others prefix, not ifbX.

Cc: Arnd Bergmann <arnd@arndb.de>
Cc: Hao Chen <chenhao288@hisilicon.com>
Cc: Heiner Kallweit <hkallweit1@gmail.com>
Cc: "Gustavo A. R. Silva" <gustavoars@kernel.org>
Cc: Danielle Ratson <danieller@nvidia.com>
Cc: Andrew Lunn <andrew@lunn.ch>
Signed-off-by: Tonghao Zhang <xiangxia.m.yue@gmail.com>
Reviewed-by: Leon Romanovsky <leonro@nvidia.com>
Link: https://lore.kernel.org/r/20211125163049.84970-1-xiangxia.m.yue@gmail.com
Signed-off-by: Jakub Kicinski <kuba@kernel.org>
---
 net/ethtool/ioctl.c | 3 +++
 1 file changed, 3 insertions(+)

diff --git a/net/ethtool/ioctl.c b/net/ethtool/ioctl.c
index 06d3866c69b4..fa8aa5ec19ba 100644
--- a/net/ethtool/ioctl.c
+++ b/net/ethtool/ioctl.c
@@ -734,6 +734,9 @@ ethtool_get_drvinfo(struct net_device *dev, struct ethtool_devlink_compat *rsp)
 			sizeof(rsp->info.bus_info));
 		strlcpy(rsp->info.driver, dev->dev.parent->driver->name,
 			sizeof(rsp->info.driver));
+	} else if (dev->rtnl_link_ops) {
+		strlcpy(rsp->info.driver, dev->rtnl_link_ops->kind,
+			sizeof(rsp->info.driver));
 	} else {
 		return -EOPNOTSUPP;
 	}
-- 
2.11.0