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>
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@ -2463,6 +2463,9 @@ slot_store(mdk_rdev_t *rdev, const char *buf, size_t len)
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if (rdev->raid_disk != -1)
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return -EBUSY;
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if (test_bit(MD_RECOVERY_RUNNING, &rdev->mddev->recovery))
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return -EBUSY;
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if (rdev->mddev->pers->hot_add_disk == NULL)
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return -EINVAL;
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