linux-kernel - [PATCH 3.2 08/24] caif: remove wrong dev_net

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Date:	Tue, 03 Mar 2015 22:11:28 +0000
From:	Ben Hutchings <ben@...adent.org.uk>
To:	linux-kernel@...r.kernel.org, stable@...r.kernel.org
CC:	akpm@...ux-foundation.org,
	"Dmitry Tarnyagin" <dmitry.tarnyagin@...kless.no>,
	"Nicolas Dichtel" <nicolas.dichtel@...nd.com>,
	"David S. Miller" <davem@...emloft.net>,
	"Sjur Brændeland" <sjur.brandeland@...ricsson.com>
Subject: [PATCH 3.2 08/24] caif: remove wrong dev_net_set() call

3.2.68-rc1 review patch.  If anyone has any objections, please let me know.

------------------

From: Nicolas Dichtel <nicolas.dichtel@...nd.com>

commit 8997c27ec41127bf57421cc0205413d525421ddc upstream.

src_net points to the netns where the netlink message has been received. This
netns may be different from the netns where the interface is created (because
the user may add IFLA_NET_NS_[PID|FD]). In this case, src_net is the link netns.

It seems wrong to override the netns in the newlink() handler because if it
was not already src_net, it means that the user explicitly asks to create the
netdevice in another netns.

CC: Sjur Brændeland <sjur.brandeland@...ricsson.com>
CC: Dmitry Tarnyagin <dmitry.tarnyagin@...kless.no>
Fixes: 8391c4aab1aa ("caif: Bugfixes in CAIF netdevice for close and flow control")
Fixes: c41254006377 ("caif-hsi: Add rtnl support")
Signed-off-by: Nicolas Dichtel <nicolas.dichtel@...nd.com>
Signed-off-by: David S. Miller <davem@...emloft.net>
[bwh: Backported to 3.2: drop the change to caif_hsi change]
Signed-off-by: Ben Hutchings <ben@...adent.org.uk>
---
--- a/net/caif/chnl_net.c
+++ b/net/caif/chnl_net.c
@@ -464,7 +464,6 @@ static int ipcaif_newlink(struct net *sr
 	ASSERT_RTNL();
 	caifdev = netdev_priv(dev);
 	caif_netlink_parms(data, &caifdev->conn_req);
-	dev_net_set(caifdev->netdev, src_net);
 
 	ret = register_netdevice(dev);
 	if (ret)

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