From: Krzysztof Wojcik <krzysztof.wojcik@intel.com>
Date: Wed, 20 Apr 2011 05:39:53 +0000 (+1000)
Subject: md: Cleanup after raid45->raid0 takeover
X-Git-Tag: v2.6.39-rc5~37^2~1
X-Git-Url: http://review.tizen.org/git/?a=commitdiff_plain;h=fee68723cf6ae00082f70f3eff17fceab2a4f7d7;p=platform%2Fkernel%2Flinux-exynos.git

md: Cleanup after raid45->raid0 takeover

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

This patch reset this variable.

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

diff --git a/drivers/md/md.c b/drivers/md/md.c
index 6e853c6..7d6f7f1 100644
--- a/drivers/md/md.c
+++ b/drivers/md/md.c
@@ -3170,6 +3170,7 @@ level_store(mddev_t *mddev, const char *buf, size_t len)
 	mddev->layout = mddev->new_layout;
 	mddev->chunk_sectors = mddev->new_chunk_sectors;
 	mddev->delta_disks = 0;
+	mddev->degraded = 0;
 	if (mddev->pers->sync_request == NULL) {
 		/* this is now an array without redundancy, so
 		 * it must always be in_sync