4.18-stable review patch. If anyone has any objections, please let me know.
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From: YueHaibing yuehaibing@huawei.com
[ Upstream commit 9e7e6cabf371cc008cb2244a04c012b516753693 ]
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 yuehaibing@huawei.com Acked-by: Sridhar Samudrala sridhar.samudrala@intel.com Signed-off-by: David S. Miller davem@davemloft.net Signed-off-by: Sasha Levin sashal@kernel.org Signed-off-by: Greg Kroah-Hartman gregkh@linuxfoundation.org --- drivers/net/net_failover.c | 3 +++ 1 file changed, 3 insertions(+)
--- a/drivers/net/net_failover.c +++ b/drivers/net/net_failover.c @@ -602,6 +602,9 @@ static int net_failover_slave_unregister 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);