From: NeilBrown <neilb@suse.de>
Date: Wed, 2 Feb 2011 00:57:13 +0000 (+1100)
Subject: md: Don't allow slot_store while resync/recovery is happening.
X-Git-Url: https://git.karo-electronics.de/?a=commitdiff_plain;h=c6751b2bde477f56ceef67aa1d298ce44e8e2e23;p=linux-beck.git

md: Don't allow slot_store while resync/recovery is happening.

Activating a spare in an array while resync/recovery is already
happening can lead the that spare being marked in-sync when it isn't
really.
So don't allow the 'slot' to be set (this activating the device)
while resync/recovery is happening.

Signed-off-by: NeilBrown <neilb@suse.de>
---

diff --git a/drivers/md/md.c b/drivers/md/md.c
index f2d5628d51cb..1138d1053e9a 100644
--- a/drivers/md/md.c
+++ b/drivers/md/md.c
@@ -2463,6 +2463,9 @@ slot_store(mdk_rdev_t *rdev, const char *buf, size_t len)
 		if (rdev->raid_disk != -1)
 			return -EBUSY;
 
+		if (test_bit(MD_RECOVERY_RUNNING, &rdev->mddev->recovery))
+			return -EBUSY;
+
 		if (rdev->mddev->pers->hot_add_disk == NULL)
 			return -EINVAL;