netdev - [RFC] slip: not call free_netdev before rtnl_unlock in slip

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Message-ID: <20200213093248.129757-1-yangerkun@huawei.com>
Date:   Thu, 13 Feb 2020 17:32:48 +0800
From:   yangerkun <yangerkun@...wei.com>
To:     <davem@...emloft.net>
CC:     <netdev@...r.kernel.org>, <maowenan@...wei.com>,
        <yangerkun@...wei.com>
Subject: [RFC] slip: not call free_netdev before rtnl_unlock in slip_open

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@...wei.com>
---
 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 6f4d7ba8b109..babb01888b78 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();
-- 
2.23.0.rc2.8.gff66981f45