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nvme: fix FDP fdpcidx bounds check

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The fdpcidx bounds check sets n = NUMFDPC + 1 but used > instead of >=,
incorrectly accepting fdp_idx when it equals n (i.e. NUMFDPC + 1).

Fixes: 30b5f20bb2 ("nvme: register fdp parameters with the block layer")
Reviewed-by: Nitesh Shetty <nj.shetty@samsung.com>
Reviewed-by: Christoph Hellwig <hch@lst.de>
Signed-off-by: liuxixin <gliuxen@gmail.com>
Signed-off-by: Keith Busch <kbusch@kernel.org>
This commit is contained in:
liuxixin 2026-05-28 18:00:01 +08:00 committed by Keith Busch
parent 8757fd9500
commit 0967074f68
1 changed files with 1 additions and 1 deletions
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2
drivers/nvme/host/core.c
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@ -2261,7 +2261,7 @@ static int nvme_query_fdp_granularity(struct nvme_ctrl *ctrl,
}
n = le16_to_cpu(h->numfdpc) + 1;
if (fdp_idx > n) {
if (fdp_idx >= n) {
dev_warn(ctrl->device, "FDP index:%d out of range:%d\n",
fdp_idx, n);
/* Proceed without registering FDP streams */