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Revert "block: nbd: add sanity check for first_minor"

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This reverts commit 4b21d4e820 which is
commit b1a811633f upstream.

The backport of this is reported to be causing some problems, so revert
this for now until they are worked out.

Link: https://lore.kernel.org/r/CACPK8XfUWoOHr-0RwRoYoskia4fbAbZ7DYf5wWBnv6qUnGq18w@mail.gmail.com
Reported-by: Joel Stanley <joel@jms.id.au>
Cc: Christoph Hellwig <hch@lst.de>
Cc: Pavel Skripkin <paskripkin@gmail.com>
Cc: Jens Axboe <axboe@kernel.dk>
Cc: Sasha Levin <sashal@kernel.org>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
This commit is contained in:
Greg Kroah-Hartman
2021-09-16 10:17:11 +02:00
parent d3c3f4e078
commit 0daa75bf75
1 changed files with 0 additions and 10 deletions
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10
drivers/block/nbd.c
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@@ -1759,17 +1759,7 @@ static int nbd_dev_add(int index)
refcount_set(&nbd->refs, 1);
INIT_LIST_HEAD(&nbd->list);
disk->major = NBD_MAJOR;
/* Too big first_minor can cause duplicate creation of
* sysfs files/links, since first_minor will be truncated to
* byte in __device_add_disk().
*/
disk->first_minor = index << part_shift;
if (disk->first_minor > 0xff) {
err = -EINVAL;
goto out_free_idr;
}
disk->fops = &nbd_fops;
disk->private_data = nbd;
sprintf(disk->disk_name, "nbd%d", index);