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md: reinitialise more mddev fields in do_md_stop. 

I keep finding problems where an mddev gets reused and some fields has a value
from a previous usage that confuses the new usage.  So clear all fields that
could possible need clearing when calling do_md_stop.

Also initialise the 'level' of a new array to LEVEL_NONE (which isn't 0).

Signed-off-by: Neil Brown <neilb@suse.de>
Signed-off-by: Andrew Morton <akpm@linux-foundation.org>
Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
This commit is contained in:
NeilBrown 2008-04-30 00:52:29 -07:00 committed by Linus Torvalds
parent 8377bc8080
commit d897dbf914
1 changed files with 25 additions and 0 deletions
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25
drivers/md/md.c
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@ -276,6 +276,7 @@ static mddev_t * mddev_find(dev_t unit)
init_waitqueue_head(&new->sb_wait);
new->reshape_position = MaxSector;
new->resync_max = MaxSector;
new->level = LEVEL_NONE;
new->queue = blk_alloc_queue(GFP_KERNEL);
if (!new->queue) {
@ -3714,6 +3715,30 @@ static int do_md_stop(mddev_t * mddev, int mode)
mddev->reshape_position = MaxSector;
mddev->external = 0;
mddev->persistent = 0;
mddev->level = LEVEL_NONE;
mddev->clevel[0] = 0;
mddev->flags = 0;
mddev->ro = 0;
mddev->metadata_type[0] = 0;
mddev->chunk_size = 0;
mddev->ctime = mddev->utime = 0;
mddev->layout = 0;
mddev->max_disks = 0;
mddev->events = 0;
mddev->delta_disks = 0;
mddev->new_level = LEVEL_NONE;
mddev->new_layout = 0;
mddev->new_chunk = 0;
mddev->curr_resync = 0;
mddev->resync_mismatches = 0;
mddev->suspend_lo = mddev->suspend_hi = 0;
mddev->sync_speed_min = mddev->sync_speed_max = 0;
mddev->recovery = 0;
mddev->in_sync = 0;
mddev->changed = 0;
mddev->degraded = 0;
mddev->barriers_work = 0;
mddev->safemode = 0;
} else if (mddev->pers)
printk(KERN_INFO "md: %s switched to read-only mode.\n",