From mboxrd@z Thu Jan 1 00:00:00 1970 Return-Path: From: Greg Kroah-Hartman To: linux-kernel@vger.kernel.org Cc: Greg Kroah-Hartman , stable@vger.kernel.org, Mike Snitzer , Joe Thornber Subject: [PATCH 3.14 054/228] dm cache: fix writethrough mode quiescing in cache_map Date: Wed, 4 Jun 2014 16:21:23 -0700 Message-Id: <20140604232349.804157341@linuxfoundation.org> In-Reply-To: <20140604232347.966798903@linuxfoundation.org> References: <20140604232347.966798903@linuxfoundation.org> MIME-Version: 1.0 Content-Type: text/plain; charset=UTF-8 Sender: linux-kernel-owner@vger.kernel.org List-ID: 3.14-stable review patch. If anyone has any objections, please let me know. ------------------ From: Mike Snitzer commit 131cd131a9ff63d4b84f3fe15073a2984ac30066 upstream. 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 Acked-by: Joe Thornber Signed-off-by: Greg Kroah-Hartman --- drivers/md/dm-cache-target.c | 1 + 1 file changed, 1 insertion(+) --- a/drivers/md/dm-cache-target.c +++ b/drivers/md/dm-cache-target.c @@ -2506,6 +2506,7 @@ static int cache_map(struct dm_target *t } 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))