nvmet: cancel fatal error and flush async work before free controller

Make sure they are not running and we can free the controller
safely.

Signed-off-by: Roy Shterman <roys@lightbitslabs.com>
Signed-off-by: Sagi Grimberg <sagi@grimberg.me>
Reviewed-by: Christoph Hellwig <hch@lst.de>
This commit is contained in:
Sagi Grimberg 2017-01-01 13:41:56 +02:00
commit 06406d81a2