diff mbox series

[4.4,4.9,2/2] slip: not call free_netdev before rtnl_unlock in slip_open

Message ID 20200602175525.GB53769@decadent.org.uk
State New
Headers show
Series None | expand

Commit Message

Ben Hutchings June 2, 2020, 5:55 p.m. UTC 
From: yangerkun <yangerkun@huawei.com>

commit f596c87005f7b1baeb7d62d9a9e25d68c3dfae10 upstream.

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>
[bwh: Backported to <4.11: free_netdev() is called through sl_free_netdev()]
Signed-off-by: Ben Hutchings <ben@decadent.org.uk>
---
 drivers/net/slip/slip.c | 3 +++
 1 file changed, 3 insertions(+)
diff mbox series

Patch

diff --git a/drivers/net/slip/slip.c b/drivers/net/slip/slip.c
index cc841126147e..f870396e05e1 100644
--- a/drivers/net/slip/slip.c
+++ b/drivers/net/slip/slip.c
@@ -867,7 +867,10 @@  static int slip_open(struct tty_struct *tty)
 	sl->tty = NULL;
 	tty->disc_data = NULL;
 	clear_bit(SLF_INUSE, &sl->flags);
+	/* do not call free_netdev before rtnl_unlock */
+	rtnl_unlock();
 	sl_free_netdev(sl->dev);
+	return err;
 
 err_exit:
 	rtnl_unlock();