Re: WARNING in tty_set_termios

[syzbot]

syzbot has bisected this bug to:

commit 162f812f23bab583f5d514ca0e4df67797ac9cdf
Author: Loic Poulain <loic.poulain@xxxxxxxxx>
Date:   Mon Sep 19 14:29:27 2016 +0000

    Bluetooth: hci_uart: Add Marvell support

bisection log:  https://syzkaller.appspot.com/x/bisect.txt?x=12cd5c2b200000
start commit:   162f812f Bluetooth: hci_uart: Add Marvell support
git tree:       upstream
final crash:    https://syzkaller.appspot.com/x/report.txt?x=11cd5c2b200000
console output: https://syzkaller.appspot.com/x/log.txt?x=16cd5c2b200000
kernel config:  https://syzkaller.appspot.com/x/.config?x=b05cfdb4ee8ab9b2
dashboard link: https://syzkaller.appspot.com/bug?extid=a950165cbb86bdd023a4
syz repro:      https://syzkaller.appspot.com/x/repro.syz?x=121cee07400000
C reproducer:   https://syzkaller.appspot.com/x/repro.c?x=16fdaed8c00000

Reported-by: syzbot+a950165cbb86bdd023a4@xxxxxxxxxxxxxxxxxxxxxxxxx
Fixes: 162f812f ("Bluetooth: hci_uart: Add Marvell support")