drbd: fix a race stopping the worker thread

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We may implicitly call drbd_send() from inside wait_for_work(),
via maybe_send_barrier().

If the "stop" signal was send just before that, drbd_send() would call
flush_signals(), and we would run an unbounded schedule() afterwards.

Fix: check for thread_state == RUNNING before we schedule()

Signed-off-by: Philipp Reisner <philipp.reisner@linbit.com>
Signed-off-by: Lars Ellenberg <lars.ellenberg@linbit.com>

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Lars Ellenberg 2013-12-27 17:17:25 +01:00 • committed by Philipp Reisner

parent c7a58db4e9

commit a80ca1ae81

1 changed files with 3 additions and 0 deletions

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drivers/block/drbd/drbd_worker.c

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