netdev - [PATCH v3 net-next 1/2] net: use dev->name in netdev

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Message-Id: <1405619171-18172-2-git-send-email-vfalico@gmail.com>
Date:	Thu, 17 Jul 2014 19:46:09 +0200
From:	Veaceslav Falico <vfalico@...il.com>
To:	netdev@...r.kernel.org
Cc:	Veaceslav Falico <vfalico@...il.com>,
	"David S. Miller" <davem@...emloft.net>,
	Tom Gundersen <teg@...m.no>
Subject: [PATCH v3 net-next 1/2] net: use dev->name in netdev_pr* when it's available

netdev_name() returns dev->name only when the net_device is in
NETREG_REGISTERED state.

However, dev->name is always populated on creation, so we can easily use
it.

There are two cases when there's no real name - when it's an empty string
or when the name is in form of "eth%d", then netdev_name() returns "unnamed
net_device".

CC: "David S. Miller" <davem@...emloft.net>
CC: Tom Gundersen <teg@...m.no>
Signed-off-by: Veaceslav Falico <vfalico@...il.com>
---

Notes:
    v1->v2:
    Also account for an empty string, as Tom Gundersen suggested.

 include/linux/netdevice.h | 4 ++--
 1 file changed, 2 insertions(+), 2 deletions(-)

diff --git a/include/linux/netdevice.h b/include/linux/netdevice.h
index 15ed750..70256aa 100644
--- a/include/linux/netdevice.h
+++ b/include/linux/netdevice.h
@@ -3383,8 +3383,8 @@ extern struct pernet_operations __net_initdata loopback_net_ops;
 
 static inline const char *netdev_name(const struct net_device *dev)
 {
-	if (dev->reg_state != NETREG_REGISTERED)
-		return "(unregistered net_device)";
+	if (!dev->name[0] || strchr(dev->name, '%'))
+		return "(unnamed net_device)";
 	return dev->name;
 }
 
-- 
1.8.4

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