From: Leon Romanovsky <leonro@mellanox.com>
Date: Wed, 12 Feb 2020 09:26:27 +0200
Subject: RDMA/ucma: Mask QPN to be 24 bits according to IBTA
Patch-mainline: v5.7-rc1
Git-commit: ca750d4a9c426854e221ca404fbefeab9800134e
References: jsc#SLE-15176
IBTA declares QPN as 24bits, mask input to ensure that kernel
doesn't get higher bits and ensure by adding WANR_ONCE() that
other CM users do the same.
Link: https://lore.kernel.org/r/20200212072635.682689-2-leon@kernel.org
Signed-off-by: Leon Romanovsky <leonro@mellanox.com>
Signed-off-by: Jason Gunthorpe <jgg@mellanox.com>
Acked-by: Thomas Bogendoerfer <tbogendoerfer@suse.de>
---
drivers/infiniband/core/cm.c | 3 +++
drivers/infiniband/core/ucma.c | 2 +-
2 files changed, 4 insertions(+), 1 deletion(-)
--- a/drivers/infiniband/core/cm.c
+++ b/drivers/infiniband/core/cm.c
@@ -2189,6 +2189,9 @@ int ib_send_cm_rep(struct ib_cm_id *cm_i
cm_id_priv->initiator_depth = param->initiator_depth;
cm_id_priv->responder_resources = param->responder_resources;
cm_id_priv->rq_psn = cpu_to_be32(IBA_GET(CM_REP_STARTING_PSN, rep_msg));
+ WARN_ONCE(param->qp_num & 0xFF000000,
+ "IBTA declares QPN to be 24 bits, but it is 0x%X\n",
+ param->qp_num);
cm_id_priv->local_qpn = cpu_to_be32(param->qp_num & 0xFFFFFF);
out: spin_unlock_irqrestore(&cm_id_priv->lock, flags);
--- a/drivers/infiniband/core/ucma.c
+++ b/drivers/infiniband/core/ucma.c
@@ -1045,7 +1045,7 @@ static void ucma_copy_conn_param(struct
dst->retry_count = src->retry_count;
dst->rnr_retry_count = src->rnr_retry_count;
dst->srq = src->srq;
- dst->qp_num = src->qp_num;
+ dst->qp_num = src->qp_num & 0xFFFFFF;
dst->qkey = (id->route.addr.src_addr.ss_family == AF_IB) ? src->qkey : 0;
}