Commit 131cd131 authored May 01, 2014 by Mike Snitzer

dm cache: fix writethrough mode quiescing in cache_map



Commit 2ee57d58 ("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+

parent fbcde3d8

drivers/md/dm-cache-target.c

+1 −0

Original line number	Diff line number	Diff line
		@@ -2488,6 +2488,7 @@ static int cache_map(struct dm_target ti, struct bio bio)

		} else {
		inc_hit_counter(cache, bio);
		pb->all_io_entry = dm_deferred_entry_inc(cache->all_io_ds);

		if (bio_data_dir(bio) == WRITE && writethrough_mode(&cache->features) &&
		!is_dirty(cache, lookup_result.cblock))