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can: vxcan: improve handling of missing peer name attribute 

commit b4c2951a48 upstream.

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>
Signed-off-by: Marc Kleine-Budde <mkl@pengutronix.de>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
pull/10/head
Oliver Hartkopp 2017-12-02 18:48:52 +01:00 committed by Greg Kroah-Hartman
parent 653c41ac47
commit b043ea189d
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 {