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block/rnbd-clt: fix wrong max ID in ida_alloc_max

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[ Upstream commit 9d6033e350694a67885605674244d43c9559dc36 ]

We need to pass 'end - 1' to ida_alloc_max after switch from
ida_simple_get to ida_alloc_max.

Otherwise smatch warns.

drivers/block/rnbd/rnbd-clt.c:1460 init_dev() error: Calling ida_alloc_max() with a 'max' argument which is a power of 2. -1 missing?

Fixes: 24afc15dbe21 ("block/rnbd: Remove a useless mutex")
Reported-by: kernel test robot <lkp@intel.com>
Reported-by: Dan Carpenter <error27@gmail.com>
Signed-off-by: Guoqing Jiang <guoqing.jiang@linux.dev>
Acked-by: Jack Wang <jinpu.wang@ionos.com>
Link: https://lore.kernel.org/r/20221230010926.32243-1-guoqing.jiang@linux.dev
Signed-off-by: Jens Axboe <axboe@kernel.dk>
Signed-off-by: Sasha Levin <sashal@kernel.org>
This commit is contained in:
Guoqing Jiang 2022-12-30 09:09:26 +08:00 committed by Greg Kroah-Hartman
parent 1c6c30cdcf
commit 94fa550b95
1 changed files with 1 additions and 1 deletions
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2
drivers/block/rnbd/rnbd-clt.c
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@ -1440,7 +1440,7 @@ static struct rnbd_clt_dev *init_dev(struct rnbd_clt_session *sess,
goto out_alloc;
}
ret = ida_alloc_max(&index_ida, 1 << (MINORBITS - RNBD_PART_BITS),
ret = ida_alloc_max(&index_ida, (1 << (MINORBITS - RNBD_PART_BITS)) - 1,
GFP_KERNEL);
if (ret < 0) {
pr_err("Failed to initialize device '%s' from session %s, allocating idr failed, err: %d\n",