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linux/fs/dlm/lowcomms.c
David Windsor b355516f45 dlm: check if workqueues are NULL before flushing/destroying 
If the DLM lowcomms stack is shut down before any DLM
traffic can be generated, flush_workqueue() and
destroy_workqueue() can be called on empty send and/or recv
workqueues.

Insert guard conditionals to only call flush_workqueue()
and destroy_workqueue() on workqueues that are not NULL.

Signed-off-by: David Windsor <dwindsor@redhat.com>
Signed-off-by: David Teigland <teigland@redhat.com>
2019-07-11 11:01:58 -05:00

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