Commits
Mike Snitzer committed 131cd131a9f
dm cache: fix writethrough mode quiescing in cache_map Commit 2ee57d58735 ("dm cache: add passthrough mode") inadvertently removed the deferred set reference that was taken in cache_map()'s writethrough mode support. Restore taking this reference. This issue was found with code inspection. Signed-off-by: Mike Snitzer <snitzer@redhat.com> Acked-by: Joe Thornber <ejt@redhat.com> Cc: stable@vger.kernel.org # 3.13+