[PATCH AUTOSEL for 4.9 117/156] ppp: Destroy the mutex when cleanup

[alexander . levin]

From: Gao Feng <gfree.w...@vip.163.com>

[ Upstream commit f02b2320b27c16b644691267ee3b5c110846f49e ]

The mutex_destroy only makes sense when enable DEBUG_MUTEX. For the
good readbility, it's better to invoke it in exit func when the init
func invokes mutex_init.

Signed-off-by: Gao Feng <gfree.w...@vip.163.com>
Acked-by: Guillaume Nault <g.na...@alphalink.fr>
Signed-off-by: David S. Miller <da...@davemloft.net>
Signed-off-by: Sasha Levin <alexander.le...@verizon.com>
---
 drivers/net/ppp/ppp_generic.c | 1 +
 1 file changed, 1 insertion(+)

diff --git a/drivers/net/ppp/ppp_generic.c b/drivers/net/ppp/ppp_generic.c
index 440d5f42810f..b883af93929c 100644
--- a/drivers/net/ppp/ppp_generic.c
+++ b/drivers/net/ppp/ppp_generic.c
@@ -958,6 +958,7 @@ static __net_exit void ppp_exit_net(struct net *net)
        unregister_netdevice_many(&list);
        rtnl_unlock();
 
+       mutex_destroy(&pn->all_ppp_mutex);
        idr_destroy(&pn->units_idr);
 }
 
-- 
2.11.0