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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: cfc80d9a11 ("net: Introduce net_failover driver")

Signed-off-by: YueHaibing <yuehaibing@huawei.com>
Acked-by: Sridhar Samudrala <sridhar.samudrala@intel.com>
Signed-off-by: David S. Miller <davem@davemloft.net>
This commit is contained in:
YueHaibing 2018-09-04 02:56:26 +00:00 committed by David S. Miller
parent 428f944bd5
commit 9e7e6cabf3
1 changed files with 3 additions and 0 deletions
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3
drivers/net/net_failover.c
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@ -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);