From 9d6033e350694a67885605674244d43c9559dc36 Mon Sep 17 00:00:00 2001 From: Guoqing Jiang Date: Fri, 30 Dec 2022 09:09:26 +0800 Subject: [PATCH] block/rnbd-clt: fix wrong max ID in ida_alloc_max 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 Reported-by: Dan Carpenter Signed-off-by: Guoqing Jiang Acked-by: Jack Wang Link: https://lore.kernel.org/r/20221230010926.32243-1-guoqing.jiang@linux.dev Signed-off-by: Jens Axboe --- drivers/block/rnbd/rnbd-clt.c | 2 +- 1 file changed, 1 insertion(+), 1 deletion(-) diff --git a/drivers/block/rnbd/rnbd-clt.c b/drivers/block/rnbd/rnbd-clt.c index 78334da74d8b..5eb8c7855970 100644 --- a/drivers/block/rnbd/rnbd-clt.c +++ b/drivers/block/rnbd/rnbd-clt.c @@ -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",