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| author | Honggang LI <honggangli@163.com> | 2025-12-29 10:56:17 +0800 |
|---|---|---|
| committer | Leon Romanovsky <leon@kernel.org> | 2025-12-30 05:47:32 -0500 |
| commit | 43bd09d5b750f700499ae8ec45fd41a4c48673e6 (patch) | |
| tree | d9192975b3825949663f3eee00a122cd36fdc067 | |
| parent | 3c68cf68233e556e0102f45b69f7448908dc1f44 (diff) | |
| download | linux-next-43bd09d5b750f700499ae8ec45fd41a4c48673e6.tar.gz linux-next-43bd09d5b750f700499ae8ec45fd41a4c48673e6.zip | |
RDMA/rtrs: Fix clt_path::max_pages_per_mr calculation
If device max_mr_size bits in the range [mr_page_shift+31:mr_page_shift]
are zero, the `min3` function will set clt_path::max_pages_per_mr to
zero.
`alloc_path_reqs` will pass zero, which is invalid, as the third parameter
to `ib_alloc_mr`.
Fixes: 6a98d71daea1 ("RDMA/rtrs: client: main functionality")
Signed-off-by: Honggang LI <honggangli@163.com>
Link: https://patch.msgid.link/20251229025617.13241-1-honggangli@163.com
Signed-off-by: Leon Romanovsky <leon@kernel.org>
| -rw-r--r-- | drivers/infiniband/ulp/rtrs/rtrs-clt.c | 1 |
1 files changed, 1 insertions, 0 deletions
diff --git a/drivers/infiniband/ulp/rtrs/rtrs-clt.c b/drivers/infiniband/ulp/rtrs/rtrs-clt.c index 71387811b281..2b397a544cb9 100644 --- a/drivers/infiniband/ulp/rtrs/rtrs-clt.c +++ b/drivers/infiniband/ulp/rtrs/rtrs-clt.c @@ -1464,6 +1464,7 @@ static void query_fast_reg_mode(struct rtrs_clt_path *clt_path) mr_page_shift = max(12, ffs(ib_dev->attrs.page_size_cap) - 1); max_pages_per_mr = ib_dev->attrs.max_mr_size; do_div(max_pages_per_mr, (1ull << mr_page_shift)); + max_pages_per_mr = min_not_zero((u32)max_pages_per_mr, U32_MAX); clt_path->max_pages_per_mr = min3(clt_path->max_pages_per_mr, (u32)max_pages_per_mr, ib_dev->attrs.max_fast_reg_page_list_len); |