6.12-stable review patch. If anyone has any objections, please let me know.
------------------
From: Selvin Xavier <selvin.xavier@xxxxxxxxxxxx>
[ 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: 1ac5a4047975 ("RDMA/bnxt_re: Add bnxt_re RoCE driver")
Reviewed-by: Kalesh AP <kalesh-anakkur.purayil@xxxxxxxxxxxx>
Signed-off-by: Selvin Xavier <selvin.xavier@xxxxxxxxxxxx>
Link: https://patch.msgid.link/20241217102649.1377704-2-kalesh-anakkur.purayil@xxxxxxxxxxxx
Signed-off-by: Leon Romanovsky <leon@xxxxxxxxxx>
Signed-off-by: Sasha Levin <sashal@xxxxxxxxxx>
---
drivers/infiniband/hw/bnxt_re/qplib_sp.c | 2 +-
1 file changed, 1 insertion(+), 1 deletion(-)
diff --git a/drivers/infiniband/hw/bnxt_re/qplib_sp.c b/drivers/infiniband/hw/bnxt_re/qplib_sp.c
index e29fbbdab9fd..63706d6d121c 100644
--- a/drivers/infiniband/hw/bnxt_re/qplib_sp.c
+++ b/drivers/infiniband/hw/bnxt_re/qplib_sp.c
@@ -129,7 +129,7 @@ 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
--
2.39.5
