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RDMA/bnxt_re: Fix max_qp_wrs reported

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[ Upstream commit 40be32303ec829ea12f9883e499bfd3fe9e52baf ]

While creating qps, driver adds one extra entry to the sq size
passed by the ULPs in order to avoid queue full condition.
When ULPs creates QPs with max_qp_wr reported, driver creates
QP with 1 more than the max_wqes supported by HW. Create QP fails
in this case. To avoid this error, reduce 1 entry in max_qp_wqes
and report it to the stack.

Fixes: 1ac5a40479 ("RDMA/bnxt_re: Add bnxt_re RoCE driver")
Reviewed-by: Kalesh AP <kalesh-anakkur.purayil@broadcom.com>
Signed-off-by: Selvin Xavier <selvin.xavier@broadcom.com>
Link: https://patch.msgid.link/20241217102649.1377704-2-kalesh-anakkur.purayil@broadcom.com
Signed-off-by: Leon Romanovsky <leon@kernel.org>
Signed-off-by: Sasha Levin <sashal@kernel.org>
This commit is contained in:
Selvin Xavier
2024-12-17 15:56:45 +05:30
committed by Greg Kroah-Hartman
parent c68c136652
commit 1dcaac7a61
1 changed files with 1 additions and 1 deletions
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2
drivers/infiniband/hw/bnxt_re/qplib_sp.c
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@@ -124,7 +124,7 @@ int bnxt_qplib_get_dev_attr(struct bnxt_qplib_rcfw *rcfw,
attr->max_qp_init_rd_atom =
sb->max_qp_init_rd_atom > BNXT_QPLIB_MAX_OUT_RD_ATOM ?
BNXT_QPLIB_MAX_OUT_RD_ATOM : sb->max_qp_init_rd_atom;
attr->max_qp_wqes = le16_to_cpu(sb->max_qp_wr);
attr->max_qp_wqes = le16_to_cpu(sb->max_qp_wr) - 1;
/*
* 128 WQEs needs to be reserved for the HW (8916). Prevent
* reporting the max number