[PATCH] FIX: Cleanup after raid45->raid0 takeover

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Problem:
After raid4->raid0 takeover operation, another takeover operation
(e.g raid0->raid10) results "kernel oops".
Root cause:
Variables 'degraded' and 'plug' in mddev structure are not cleared
after raid45->raid0 takeover.

This patch reset these variables.

Signed-off-by: Krzysztof Wojcik <krzysztof.wojcik@xxxxxxxxx>
---
 drivers/md/raid0.c |    2 ++
 1 files changed, 2 insertions(+), 0 deletions(-)

diff --git a/drivers/md/raid0.c b/drivers/md/raid0.c
index c0ac457..5d47113 100644
--- a/drivers/md/raid0.c
+++ b/drivers/md/raid0.c
@@ -603,6 +603,8 @@ static void *raid0_takeover_raid45(mddev_t *mddev)
 	mddev->new_chunk_sectors = mddev->chunk_sectors;
 	mddev->raid_disks--;
 	mddev->delta_disks = -1;
+	mddev->degraded = 0;
+	mddev->plug = NULL;
 	/* make sure it will be not marked as dirty */
 	mddev->recovery_cp = MaxSector;
 

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