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")
Suggested-by: Samudrala, Sridhar <sridhar.samudrala@xxxxxxxxx>
Signed-off-by: YueHaibing <yuehaibing@xxxxxxxxxx>
---
drivers/net/net_failover.c | 3 +++
1 file changed, 3 insertions(+)
diff --git a/drivers/net/net_failover.c b/drivers/net/net_failover.c
index 7ae1856..af1ece8 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,
nfo_info = netdev_priv(failover_dev);
primary_dev = rtnl_dereference(nfo_info->primary_dev);
standby_dev = rtnl_dereference(nfo_info->standby_dev);
+
+ if (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);
