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can: vxcan: improve handling of missing peer name attribute

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Picking up the patch from Serhey Popovych (commit 191cdb3822,
"veth: Be more robust on network device creation when no attributes").

When the peer name attribute is not provided the former implementation tries
to register the given device name twice ... which leads to -EEXIST.
If only one device name is given apply an automatic generated and valid name
for the peer.

Cc: Serhey Popovych <serhe.popovych@gmail.com>
Signed-off-by: Oliver Hartkopp <socketcan@hartkopp.net>
Cc: linux-stable <stable@vger.kernel.org>
Signed-off-by: Marc Kleine-Budde <mkl@pengutronix.de>
This commit is contained in:
Oliver Hartkopp 2017-12-02 18:48:52 +01:00 • committed by Marc Kleine-Budde
parent 820d1d5eba
commit b4c2951a48
1 changed files with 1 additions and 1 deletions
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2
drivers/net/can/vxcan.c
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@ -194,7 +194,7 @@ static int vxcan_newlink(struct net *net, struct net_device *dev,
tbp = peer_tb;
}
if (tbp[IFLA_IFNAME]) {
if (ifmp && tbp[IFLA_IFNAME]) {
nla_strlcpy(ifname, tbp[IFLA_IFNAME], IFNAMSIZ);
name_assign_type = NET_NAME_USER;
} else {