[PATCH AUTOSEL 5.7 272/274] net_failover: fixed rollback in net_failover_open()

[Sasha Levin]

From: Vasily Averin <v...@virtuozzo.com>

[ Upstream commit e8224bfe77293494626f6eec1884fee7b87d0ced ]

found by smatch:
drivers/net/net_failover.c:65 net_failover_open() error:
 we previously assumed 'primary_dev' could be null (see line 43)

Fixes: cfc80d9a1163 ("net: Introduce net_failover driver")
Signed-off-by: Vasily Averin <v...@virtuozzo.com>
Signed-off-by: David S. Miller <da...@davemloft.net>
Signed-off-by: Sasha Levin <sas...@kernel.org>
---
 drivers/net/net_failover.c | 3 ++-
 1 file changed, 2 insertions(+), 1 deletion(-)

diff --git a/drivers/net/net_failover.c b/drivers/net/net_failover.c
index b16a1221d19b..fb182bec8f06 100644
--- a/drivers/net/net_failover.c
+++ b/drivers/net/net_failover.c
@@ -61,7 +61,8 @@ static int net_failover_open(struct net_device *dev)
        return 0;
 
 err_standby_open:
-       dev_close(primary_dev);
+       if (primary_dev)
+               dev_close(primary_dev);
 err_primary_open:
        netif_tx_disable(dev);
        return err;
-- 
2.25.1