bcache: prevent crash on changing writeback_running

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commit 8d16ce540c upstream.

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>
Signed-off-by: Jens Axboe <axboe@fb.com>
Signed-off-by: Luis Henriques <luis.henriques@canonical.com>

...

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Stefan Bader 2015-11-29 18:44:49 -08:00 • committed by Luis Henriques

parent 6468bfb9bc

commit 79eeb71cb8

1 changed files with 2 additions and 1 deletions

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drivers/md/bcache/writeback.h

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