linux-kernel - [PATCH 4.9 57/63] rxe: fix error completion wr_id and qp

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Message-Id: <20190111131054.818823621@linuxfoundation.org>
Date:   Fri, 11 Jan 2019 15:15:00 +0100
From:   Greg Kroah-Hartman <gregkh@...uxfoundation.org>
To:     linux-kernel@...r.kernel.org
Cc:     Greg Kroah-Hartman <gregkh@...uxfoundation.org>,
        stable@...r.kernel.org,
        Walker Benjamin <benjamin.walker@...el.com>,
        Sagi Grimberg <sagi@...mberg.me>,
        Zhu Yanjun <yanjun.zhu@...cle.com>,
        Doug Ledford <dledford@...hat.com>
Subject: [PATCH 4.9 57/63] rxe: fix error completion wr_id and qp_num

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

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

From: Sagi Grimberg <sagi@...mberg.me>

commit e48d8ed9c6193502d849b35767fd18e20bbd7ba2 upstream.

Error completions must still contain a valid wr_id and
qp_num such that the consumer can rely on. Correctly
fill these fields in receive error completions.

Reported-by: Walker Benjamin <benjamin.walker@...el.com>
Cc: stable@...r.kernel.org
Signed-off-by: Sagi Grimberg <sagi@...mberg.me>
Reviewed-by: Zhu Yanjun <yanjun.zhu@...cle.com>
Tested-by: Zhu Yanjun <yanjun.zhu@...cle.com>
Signed-off-by: Doug Ledford <dledford@...hat.com>
Signed-off-by: Greg Kroah-Hartman <gregkh@...uxfoundation.org>

---
 drivers/infiniband/sw/rxe/rxe_resp.c |   13 +++++++++----
 1 file changed, 9 insertions(+), 4 deletions(-)

--- a/drivers/infiniband/sw/rxe/rxe_resp.c
+++ b/drivers/infiniband/sw/rxe/rxe_resp.c
@@ -826,11 +826,16 @@ static enum resp_states do_complete(stru
 
 	memset(&cqe, 0, sizeof(cqe));
 
-	wc->wr_id		= wqe->wr_id;
-	wc->status		= qp->resp.status;
-	wc->qp			= &qp->ibqp;
+	if (qp->rcq->is_user) {
+		uwc->status             = qp->resp.status;
+		uwc->qp_num             = qp->ibqp.qp_num;
+		uwc->wr_id              = wqe->wr_id;
+	} else {
+		wc->status              = qp->resp.status;
+		wc->qp                  = &qp->ibqp;
+		wc->wr_id               = wqe->wr_id;
+	}
 
-	/* fields after status are not required for errors */
 	if (wc->status == IB_WC_SUCCESS) {
 		wc->opcode = (pkt->mask & RXE_IMMDT_MASK &&
 				pkt->mask & RXE_WRITE_MASK) ?