linux-kernel - [PATCH AUTOSEL for 4.15 011/189] RDMA/core: Clarify rdma_ah_find

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Message-ID: <20180409001637.162453-11-alexander.levin@microsoft.com>
Date:   Mon, 9 Apr 2018 00:16:52 +0000
From:   Sasha Levin <Alexander.Levin@...rosoft.com>
To:     "stable@...r.kernel.org" <stable@...r.kernel.org>,
        "linux-kernel@...r.kernel.org" <linux-kernel@...r.kernel.org>
CC:     Parav Pandit <parav@...lanox.com>,
        Leon Romanovsky <leon@...nel.org>,
        Jason Gunthorpe <jgg@...lanox.com>,
        Sasha Levin <Alexander.Levin@...rosoft.com>
Subject: [PATCH AUTOSEL for 4.15 011/189] RDMA/core: Clarify rdma_ah_find_type

From: Parav Pandit <parav@...lanox.com>

[ Upstream commit a6532e7139660c103dda181aa5b2c734aa26ed6c ]

iWARP does not use rdma_ah_attr_type, and for this reason we do not have a
RDMA_AH_ATTR_TYPE_IWARP. rdma_ah_find_type should not even be called on iwarp
ports and for clarity it shouldn't have a special test for iWarp.

This changes the result from RDMA_AH_ATTR_TYPE_ROCE to RDMA_AH_ATTR_TYPE_IB
when wrongly called on an iWarp port.

Fixes: 44c58487d51a ("IB/core: Define 'ib' and 'roce' rdma_ah_attr types")
Signed-off-by: Parav Pandit <parav@...lanox.com>
Signed-off-by: Leon Romanovsky <leon@...nel.org>
Signed-off-by: Jason Gunthorpe <jgg@...lanox.com>
Signed-off-by: Sasha Levin <alexander.levin@...rosoft.com>
---
 include/rdma/ib_verbs.h | 3 +--
 1 file changed, 1 insertion(+), 2 deletions(-)

diff --git a/include/rdma/ib_verbs.h b/include/rdma/ib_verbs.h
index 0d6a110dae7c..20ebf9061962 100644
--- a/include/rdma/ib_verbs.h
+++ b/include/rdma/ib_verbs.h
@@ -3793,8 +3793,7 @@ static inline void rdma_ah_set_grh(struct rdma_ah_attr *attr,
 static inline enum rdma_ah_attr_type rdma_ah_find_type(struct ib_device *dev,
 						       u32 port_num)
 {
-	if ((rdma_protocol_roce(dev, port_num)) ||
-	    (rdma_protocol_iwarp(dev, port_num)))
+	if (rdma_protocol_roce(dev, port_num))
 		return RDMA_AH_ATTR_TYPE_ROCE;
 	else if ((rdma_protocol_ib(dev, port_num)) &&
 		 (rdma_cap_opa_ah(dev, port_num)))
-- 
2.15.1