From: Jonathan E Brassow <jbrassow@redhat.com>
Date: Wed, 7 Mar 2012 19:09:48 +0000 (+0000)
Subject: dm raid: fix flush support
X-Git-Url: http://git.osdn.net/view?a=commitdiff_plain;h=0ca93de9b789e0eb05e103f0c04de72df13da73a;p=sagit-ice-cold%2Fkernel_xiaomi_msm8998.git

dm raid: fix flush support

Fix dm-raid flush support.

Both md and dm have support for flush, but the dm-raid target
forgot to set the flag to indicate that flushes should be
passed on.  (Important for data integrity e.g. with writeback cache
enabled.)

Signed-off-by: Jonathan Brassow <jbrassow@redhat.com>
Acked-by: Mike Snitzer <snitzer@redhat.com>
Cc: stable@kernel.org
Signed-off-by: Alasdair G Kergon <agk@redhat.com>
---

diff --git a/drivers/md/dm-raid.c b/drivers/md/dm-raid.c
index f53bb389c18f..787022c18187 100644
--- a/drivers/md/dm-raid.c
+++ b/drivers/md/dm-raid.c
@@ -975,6 +975,7 @@ static int raid_ctr(struct dm_target *ti, unsigned argc, char **argv)
 
 	INIT_WORK(&rs->md.event_work, do_table_event);
 	ti->private = rs;
+	ti->num_flush_requests = 1;
 
 	mutex_lock(&rs->md.reconfig_mutex);
 	ret = md_run(&rs->md);