From: YueHaibing Date: Tue, 4 Sep 2018 02:56:26 +0000 (+0000) Subject: failover: Add missing check to validate 'slave_dev' in net_failover_slave_unregister X-Git-Url: http://git.maquefel.me/?a=commitdiff_plain;h=9e7e6cabf371cc008cb2244a04c012b516753693;p=linux.git failover: Add missing check to validate 'slave_dev' in net_failover_slave_unregister Fixes gcc '-Wunused-but-set-variable' warning: drivers/net/net_failover.c: In function 'net_failover_slave_unregister': drivers/net/net_failover.c:598:35: warning: variable 'primary_dev' set but not used [-Wunused-but-set-variable] There should check the validity of 'slave_dev'. Fixes: cfc80d9a1163 ("net: Introduce net_failover driver") Signed-off-by: YueHaibing Acked-by: Sridhar Samudrala Signed-off-by: David S. Miller --- diff --git a/drivers/net/net_failover.c b/drivers/net/net_failover.c index 192ae1cd17f02..8524fe4fddea2 100644 --- a/drivers/net/net_failover.c +++ b/drivers/net/net_failover.c @@ -602,6 +602,9 @@ static int net_failover_slave_unregister(struct net_device *slave_dev, primary_dev = rtnl_dereference(nfo_info->primary_dev); standby_dev = rtnl_dereference(nfo_info->standby_dev); + if (WARN_ON_ONCE(slave_dev != primary_dev && slave_dev != standby_dev)) + return -ENODEV; + vlan_vids_del_by_dev(slave_dev, failover_dev); dev_uc_unsync(slave_dev, failover_dev); dev_mc_unsync(slave_dev, failover_dev);