| commit | 8d16ce540c94c9d366eb36fc91b7154d92d6397b | [log] [tgz] |
|---|---|---|
| author | Stefan Bader <stefan.bader@canonical.com> | Sun Nov 29 18:44:49 2015 -0800 |
| committer | Jens Axboe <axboe@fb.com> | Wed Dec 30 20:23:14 2015 -0700 |
| tree | 0fae348076b0dcd745a2ee2cadaba965bd0587e4 | |
| parent | d7076f21629f8f329bca4a44dc408d94670f49e2 [diff] |
bcache: prevent crash on changing writeback_running Added a safeguard in the shutdown case. At least while not being attached it is also possible to trigger a kernel bug by writing into writeback_running. This change adds the same check before trying to wake up the thread for that case. Signed-off-by: Stefan Bader <stefan.bader@canonical.com> Cc: Kent Overstreet <kent.overstreet@gmail.com> Cc: stable@vger.kernel.org Signed-off-by: Jens Axboe <axboe@fb.com>