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Subject[PATCH 5.4 37/60] slip: not call free_netdev before rtnl_unlock in slip_open
Date
From: yangerkun <yangerkun@huawei.com>

[ Upstream commit f596c87005f7b1baeb7d62d9a9e25d68c3dfae10 ]

As the description before netdev_run_todo, we cannot call free_netdev
before rtnl_unlock, fix it by reorder the code.

Signed-off-by: yangerkun <yangerkun@huawei.com>
Reviewed-by: Oliver Hartkopp <socketcan@hartkopp.net>
Signed-off-by: David S. Miller <davem@davemloft.net>
Signed-off-by: Sasha Levin <sashal@kernel.org>
---
drivers/net/slip/slip.c | 3 +++
1 file changed, 3 insertions(+)

diff --git a/drivers/net/slip/slip.c b/drivers/net/slip/slip.c
index 61d7e0d1d77db..8e56a41dd7585 100644
--- a/drivers/net/slip/slip.c
+++ b/drivers/net/slip/slip.c
@@ -863,7 +863,10 @@ static int slip_open(struct tty_struct *tty)
tty->disc_data = NULL;
clear_bit(SLF_INUSE, &sl->flags);
sl_free_netdev(sl->dev);
+ /* do not call free_netdev before rtnl_unlock */
+ rtnl_unlock();
free_netdev(sl->dev);
+ return err;

err_exit:
rtnl_unlock();
--
2.20.1


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