netdev - [PATCH net-next 2/2] net: Use rtnl_lock_killable() in register

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Message-ID: <152105504831.24797.8372021805674601073.stgit@localhost.localdomain>
Date:   Wed, 14 Mar 2018 22:17:28 +0300
From:   Kirill Tkhai <ktkhai@...tuozzo.com>
To:     davem@...emloft.net, ktkhai@...tuozzo.com, vyasevic@...hat.com,
        edumazet@...gle.com, nicolas.dichtel@...nd.com,
        netdev@...r.kernel.org
Subject: [PATCH net-next 2/2] net: Use rtnl_lock_killable() in
 register_netdev()

This patch adds rtnl_lock_killable() to one of hot path
using rtnl_lock().

Signed-off-by: Kirill Tkhai <ktkhai@...tuozzo.com>
---
 net/core/dev.c |    3 ++-
 1 file changed, 2 insertions(+), 1 deletion(-)

diff --git a/net/core/dev.c b/net/core/dev.c
index 12a9aad0b057..d8887cc38e7b 100644
--- a/net/core/dev.c
+++ b/net/core/dev.c
@@ -8018,7 +8018,8 @@ int register_netdev(struct net_device *dev)
 {
 	int err;
 
-	rtnl_lock();
+	if (rtnl_lock_killable())
+		return -EINTR;
 	err = register_netdevice(dev);
 	rtnl_unlock();
 	return err;