net: Check CHANGEUPPER notifier return value
authorIdo Schimmel <idosch@mellanox.com>
Thu, 3 Dec 2015 11:12:03 +0000 (12:12 +0100)
committerDavid S. Miller <davem@davemloft.net>
Thu, 3 Dec 2015 16:49:23 +0000 (11:49 -0500)
commitb03804e7c3ad41c265c0ca21ddb306b252b4f99f
treea887cd7567a12b2c87f5d9e01bacc75c461f7231
parent3b195843f59b8aefdc15c689615745bf6758756c
net: Check CHANGEUPPER notifier return value

switchdev drivers reflect the newly requested topology to hardware when
CHANGEUPPER is received, after software links were already formed.
However, the operation can fail and user will not be notified, as the
return value of the notifier is not checked.

Add this check and rollback software links if necessary.

Signed-off-by: Ido Schimmel <idosch@mellanox.com>
Signed-off-by: Jiri Pirko <jiri@mellanox.com>
Signed-off-by: David S. Miller <davem@davemloft.net>
net/core/dev.c