dm persistent data: always unlock superblock in dm_bm_flush_and_unlock
Unlock the superblock even if initial dm_bufio_write_dirty_buffers fails. Also, remove redundant flush calls. dm_bm_flush_and_unlock's calls to dm_bufio_write_dirty_buffers already result in dm_bufio_issue_flush being called. This avoids warnings about unflushed dirty buffers from bufio. Signed-off-by:Joe Thornber <ejt@redhat.com> Signed-off-by:
Mike Snitzer <snitzer@redhat.com> Signed-off-by:
Alasdair G Kergon <agk@redhat.com>
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