From: Krzysztof Wojcik <krzysztof.wojcik@intel.com>
Date: Sun, 13 Feb 2011 23:01:41 +0000 (+1100)
Subject: md: Fix raid1->raid0 takeover
X-Git-Tag: firefly_0821_release~7613^2~2367^2~5
X-Git-Url: http://demsky.eecs.uci.edu/git/?a=commitdiff_plain;h=f7bee80945155ad0326916486dabc38428c6cdef;p=firefly-linux-kernel-4.4.55.git

md: Fix raid1->raid0 takeover

Takeover raid1->raid0 not succeded. Kernel message is shown:
"md/raid0:md126: too few disks (1 of 2) - aborting!"

Problem was that we weren't updating ->raid_disks for that
takeover, unlike all the others.

Signed-off-by: Krzysztof Wojcik <krzysztof.wojcik@intel.com>
Signed-off-by: NeilBrown <neilb@suse.de>
---

diff --git a/drivers/md/raid0.c b/drivers/md/raid0.c
index 637a96855edb..75671dfee551 100644
--- a/drivers/md/raid0.c
+++ b/drivers/md/raid0.c
@@ -670,6 +670,7 @@ static void *raid0_takeover_raid1(mddev_t *mddev)
 	mddev->new_layout = 0;
 	mddev->new_chunk_sectors = 128; /* by default set chunk size to 64k */
 	mddev->delta_disks = 1 - mddev->raid_disks;
+	mddev->raid_disks = 1;
 	/* make sure it will be not marked as dirty */
 	mddev->recovery_cp = MaxSector;