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[PATCH] dm: free minor after unlink gendisk

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Minor number should be freed after del_gendisk().  Otherwise, there could
be a window where 2 registered gendisk has same minor number.

Signed-off-by: Jun'ichi Nomura <j-nomura@ce.jp.nec.com>
Acked-by: Alasdair G Kergon <agk@redhat.com>
Cc: <stable@kernel.org>
Signed-off-by: Andrew Morton <akpm@osdl.org>
Signed-off-by: Linus Torvalds <torvalds@osdl.org>
This commit is contained in:
Jun'ichi Nomura 2006-02-24 13:04:25 -08:00 committed by Linus Torvalds
parent d9dde59ba0
commit 63d94e482d
1 changed files with 3 additions and 1 deletions
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4
drivers/md/dm.c
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@ -849,14 +849,16 @@ static struct mapped_device *alloc_dev(unsigned int minor, int persistent)
static void free_dev(struct mapped_device *md)
{
unsigned int minor = md->disk->first_minor;
if (md->suspended_bdev) {
thaw_bdev(md->suspended_bdev, NULL);
bdput(md->suspended_bdev);
}
free_minor(md->disk->first_minor);
mempool_destroy(md->tio_pool);
mempool_destroy(md->io_pool);
del_gendisk(md->disk);
free_minor(minor);
put_disk(md->disk);
blk_put_queue(md->queue);
kfree(md);