linux-kernel - [PATCH 4.16 131/279] IB/rxe: add RXE_START_MASK for rxe_opcode IB_OPCODE_RC_SEND_ONLY

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Date:   Mon, 18 Jun 2018 10:11:56 +0200
From:   Greg Kroah-Hartman <gregkh@...uxfoundation.org>
To:     linux-kernel@...r.kernel.org
Cc:     Greg Kroah-Hartman <gregkh@...uxfoundation.org>,
        stable@...r.kernel.org, Jianchao Wang <jianchao.w.wang@...cle.com>,
        Zhu Yanjun <yanjun.zhu@...cle.com>,
        Doug Ledford <dledford@...hat.com>,
        Sasha Levin <alexander.levin@...rosoft.com>
Subject: [PATCH 4.16 131/279] IB/rxe: add RXE_START_MASK for rxe_opcode IB_OPCODE_RC_SEND_ONLY_INV

4.16-stable review patch.  If anyone has any objections, please let me know.

------------------

From: Jianchao Wang <jianchao.w.wang@...cle.com>

[ Upstream commit 2da36d44a9d54a2c6e1f8da1f7ccc26b0bc6cfec ]

w/o RXE_START_MASK, the last_psn of IB_OPCODE_RC_SEND_ONLY_INV
will not be updated in update_wqe_psn, and the corresponding
wqe will not be acked in rxe_completer due to its last_psn is
zero. Finally, the other wqe will also not be able to be acked,
because the wqe of IB_OPCODE_RC_SEND_ONLY_INV with last_psn 0
is still there. This causes large amount of io timeout when
nvmeof is over rxe.

Add RXE_START_MASK for IB_OPCODE_RC_SEND_ONLY_INV to fix this.

Signed-off-by: Jianchao Wang <jianchao.w.wang@...cle.com>
Reviewed-by: Zhu Yanjun <yanjun.zhu@...cle.com>
Signed-off-by: Doug Ledford <dledford@...hat.com>
Signed-off-by: Sasha Levin <alexander.levin@...rosoft.com>
Signed-off-by: Greg Kroah-Hartman <gregkh@...uxfoundation.org>
---
 drivers/infiniband/sw/rxe/rxe_opcode.c |    2 +-
 1 file changed, 1 insertion(+), 1 deletion(-)

--- a/drivers/infiniband/sw/rxe/rxe_opcode.c
+++ b/drivers/infiniband/sw/rxe/rxe_opcode.c
@@ -390,7 +390,7 @@ struct rxe_opcode_info rxe_opcode[RXE_NU
 		.name	= "IB_OPCODE_RC_SEND_ONLY_INV",
 		.mask	= RXE_IETH_MASK | RXE_PAYLOAD_MASK | RXE_REQ_MASK
 				| RXE_COMP_MASK | RXE_RWR_MASK | RXE_SEND_MASK
-				| RXE_END_MASK,
+				| RXE_END_MASK  | RXE_START_MASK,
 		.length = RXE_BTH_BYTES + RXE_IETH_BYTES,
 		.offset = {
 			[RXE_BTH]	= 0,