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MD RAID10: Prep for DM RAID10 device replacement capability

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MD RAID10:  Fix a couple potential kernel panics if RAID10 is used by dm-raid

When device-mapper uses the RAID10 personality through dm-raid.c, there is no
'gendisk' structure in mddev and some sysfs information is also not populated.

This patch avoids touching those non-existent structures.

Signed-off-by: Jonathan Brassow <jbrassow@rehdat.com>
Signed-off-by: NeilBrown <neilb@suse.de>
This commit is contained in:
Jonathan Brassow 2012-10-11 13:38:58 +11:00 • committed by NeilBrown
parent 1ca69c4bc4
commit 2863b9eb44
2 changed files with 9 additions and 3 deletions
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2
drivers/md/raid10.c
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@ -1694,7 +1694,7 @@ static int raid10_spare_active(struct mddev *mddev)
&& !test_bit(Faulty, &tmp->rdev->flags)
&& !test_and_set_bit(In_sync, &tmp->rdev->flags)) {
count++;
sysfs_notify_dirent(tmp->rdev->sysfs_state);
sysfs_notify_dirent_safe(tmp->rdev->sysfs_state);
}
}
spin_lock_irqsave(&conf->device_lock, flags);