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md: prevent duplicates in bind_rdev_to_array 

Found when trying to reassemble an active externally managed array.  Without
this check we hit the more noisy "sysfs duplicate" warning in the later call
to kobject_add.

Signed-off-by: Dan Williams <dan.j.williams@intel.com>
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>
hifive-unleashed-5.1
Dan Williams 2008-04-30 00:52:32 -07:00 committed by Linus Torvalds
parent 242b363e22
commit 11e2ede022
1 changed files with 5 additions and 0 deletions
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5
drivers/md/md.c
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@ -1370,6 +1370,11 @@ static int bind_rdev_to_array(mdk_rdev_t * rdev, mddev_t * mddev)
MD_BUG();
return -EINVAL;
}
/* prevent duplicates */
if (find_rdev(mddev, rdev->bdev->bd_dev))
return -EEXIST;
/* make sure rdev->size exceeds mddev->size */
if (rdev->size && (mddev->size == 0 || rdev->size < mddev->size)) {
if (mddev->pers) {