netdev - [PATCH] net/core/dev: print rtnl kind as driver name for virtual devices

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Date:   Fri, 20 Sep 2019 15:15:55 +0300
From:   Konstantin Khlebnikov <khlebnikov@...dex-team.ru>
To:     netdev@...r.kernel.org, "David S. Miller" <davem@...emloft.net>
Subject: [PATCH] net/core/dev: print rtnl kind as driver name for virtual
 devices

Device kind gives more information than only arbitrary device name.

Signed-off-by: Konstantin Khlebnikov <khlebnikov@...dex-team.ru>
---
 net/core/dev.c |   15 ++++++---------
 1 file changed, 6 insertions(+), 9 deletions(-)

diff --git a/net/core/dev.c b/net/core/dev.c
index 71b18e80389f..c84561634afd 100644
--- a/net/core/dev.c
+++ b/net/core/dev.c
@@ -9651,17 +9651,14 @@ static int __net_init netdev_init(struct net *net)
  */
 const char *netdev_drivername(const struct net_device *dev)
 {
-	const struct device_driver *driver;
 	const struct device *parent;
 	const char *empty = "";
 
 	parent = dev->dev.parent;
-	if (!parent)
-		return empty;
-
-	driver = parent->driver;
-	if (driver && driver->name)
-		return driver->name;
+	if (parent)
+		return dev_driver_string(parent);
+	if (dev->rtnl_link_ops)
+		return dev->rtnl_link_ops->kind;
 	return empty;
 }
 
@@ -9677,8 +9674,8 @@ static void __netdev_printk(const char *level, const struct net_device *dev,
 				netdev_name(dev), netdev_reg_state(dev),
 				vaf);
 	} else if (dev) {
-		printk("%s%s%s: %pV",
-		       level, netdev_name(dev), netdev_reg_state(dev), vaf);
+		printk("%s%s %s%s: %pV", level, netdev_drivername(dev),
+		       netdev_name(dev), netdev_reg_state(dev), vaf);
 	} else {
 		printk("%s(NULL net_device): %pV", level, vaf);
 	}