netdev - [net-next v3] net: ethtool: set a default driver name

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Date:   Fri, 26 Nov 2021 00:30:49 +0800
From:   xiangxia.m.yue@...il.com
To:     netdev@...r.kernel.org
Cc:     Tonghao Zhang <xiangxia.m.yue@...il.com>,
        "David S. Miller" <davem@...emloft.net>,
        Jakub Kicinski <kuba@...nel.org>,
        Leon Romanovsky <leon@...nel.org>,
        Arnd Bergmann <arnd@...db.de>,
        Hao Chen <chenhao288@...ilicon.com>,
        Heiner Kallweit <hkallweit1@...il.com>,
        "Gustavo A. R. Silva" <gustavoars@...nel.org>,
        Danielle Ratson <danieller@...dia.com>,
        Andrew Lunn <andrew@...n.ch>,
        Leon Romanovsky <leonro@...dia.com>
Subject: [net-next v3] net: ethtool: set a default driver name

From: Tonghao Zhang <xiangxia.m.yue@...il.com>

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: "David S. Miller" <davem@...emloft.net>
Cc: Jakub Kicinski <kuba@...nel.org>
Cc: Leon Romanovsky <leon@...nel.org>
Cc: Arnd Bergmann <arnd@...db.de>
Cc: Hao Chen <chenhao288@...ilicon.com>
Cc: Heiner Kallweit <hkallweit1@...il.com>
Cc: "Gustavo A. R. Silva" <gustavoars@...nel.org>
Cc: Danielle Ratson <danieller@...dia.com>
Cc: Andrew Lunn <andrew@...n.ch>
Signed-off-by: Tonghao Zhang <xiangxia.m.yue@...il.com>
Reviewed-by: Leon Romanovsky <leonro@...dia.com>
---
v2: remove unnecessary white line
v1: https://lore.kernel.org/all/20211124181858.6c4668db@kicinski-fedora-pc1c0hjn.dhcp.thefacebook.com/ 
---
 net/ethtool/ioctl.c | 3 +++
 1 file changed, 3 insertions(+)

diff --git a/net/ethtool/ioctl.c b/net/ethtool/ioctl.c
index af2d4e022076..3d7bff407580 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;
 	}
-- 
2.27.0