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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>

authored by

Honggang LI and committed by
Leon Romanovsky 43bd09d5 3c68cf68

+1
+1
drivers/infiniband/ulp/rtrs/rtrs-clt.c
··· 1464 1464 mr_page_shift = max(12, ffs(ib_dev->attrs.page_size_cap) - 1); 1465 1465 max_pages_per_mr = ib_dev->attrs.max_mr_size; 1466 1466 do_div(max_pages_per_mr, (1ull << mr_page_shift)); 1467 + max_pages_per_mr = min_not_zero((u32)max_pages_per_mr, U32_MAX); 1467 1468 clt_path->max_pages_per_mr = 1468 1469 min3(clt_path->max_pages_per_mr, (u32)max_pages_per_mr, 1469 1470 ib_dev->attrs.max_fast_reg_page_list_len);