INFO: task hung in process_measurement

[syzbot]

syzbot has bisected this bug to:

commit 8fe5616b20e5742bb5fee0e77dffe2fc76ac92a0
Author: Jyri Sarha <jsarha at ti.com>
Date:   Tue Jun 14 08:43:30 2016 +0000

     drm/tilcdc: Restore old dpms state in pm_resume()

bisection log:  https://syzkaller.appspot.com/x/bisect.txt?x=10daff1b200000
start commit:   291d0e5d Merge tag 'for-linus-20180929' of git://git.kerne..
git tree:       upstream
final crash:    https://syzkaller.appspot.com/x/report.txt?x=12daff1b200000
console output: https://syzkaller.appspot.com/x/log.txt?x=14daff1b200000
kernel config:  https://syzkaller.appspot.com/x/.config?x=a8212f992609a887
dashboard link: https://syzkaller.appspot.com/bug?extid=cdc562bc26a2b2b0a94f
syz repro:      https://syzkaller.appspot.com/x/repro.syz?x=140e285e400000
C reproducer:   https://syzkaller.appspot.com/x/repro.c?x=1237fe81400000

Reported-by: syzbot+cdc562bc26a2b2b0a94f at syzkaller.appspotmail.com
Fixes: 8fe5616b20e5 ("drm/tilcdc: Restore old dpms state in pm_resume()")

For information about bisection process see: https://goo.gl/tpsmEJ#bisection