linux-kernel - [PATCH] IB/ehca: Reject recv WRs if QP is in RESET state

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Date:	Mon, 9 Jun 2008 13:24:20 +0200
From:	Joachim Fenkes <fenkes@...ibm.com>
To:	Dotan Barak <dotanba@...il.com>,
	LinuxPPC-Dev <linuxppc-dev@...abs.org>,
	LKML <linux-kernel@...r.kernel.org>,
	OF-General <general@...ts.openfabrics.org>,
	Roland Dreier <rolandd@...co.com>,
	OF-EWG <ewg@...ts.openfabrics.org>
Cc:	Stefan Roscher <stefan.roscher@...ibm.com>,
	Christoph Raisch <raisch@...ibm.com>,
	"Hoang-Nam Nguyen" <hnguyen@...ibm.com>
Subject: [PATCH] IB/ehca: Reject recv WRs if QP is in RESET state

Signed-off-by: Joachim Fenkes <fenkes@...ibm.com>
---
On Friday 06 June 2008 22:20, Dotan Barak wrote:

> I checked the code in the ehca driver and noticed that
> post RR to a QP is being accepted in any state (including the RESET state).

You're right, this is only consistent -- thanks for pointing it out!

Regards,
  Joachim

 drivers/infiniband/hw/ehca/ehca_reqs.c |   12 ++++++++++--
 1 files changed, 10 insertions(+), 2 deletions(-)

diff --git a/drivers/infiniband/hw/ehca/ehca_reqs.c b/drivers/infiniband/hw/ehca/ehca_reqs.c
index f093b00..ad197f4 100644
--- a/drivers/infiniband/hw/ehca/ehca_reqs.c
+++ b/drivers/infiniband/hw/ehca/ehca_reqs.c
@@ -544,8 +544,16 @@ int ehca_post_recv(struct ib_qp *qp,
 		   struct ib_recv_wr *recv_wr,
 		   struct ib_recv_wr **bad_recv_wr)
 {
-	return internal_post_recv(container_of(qp, struct ehca_qp, ib_qp),
-				  qp->device, recv_wr, bad_recv_wr);
+	struct ehca_qp *my_qp = container_of(qp, struct ehca_qp, ib_qp);
+
+	/* Reject WR if QP is in RESET state */
+	if (unlikely(my_qp->state == IB_QPS_RESET)) {
+		ehca_err(qp->device, "Invalid QP state  qp_state=%d qpn=%x",
+			 my_qp->state, qp->qp_num);
+		return -EINVAL;
+	}
+
+	return internal_post_recv(my_qp, qp->device, recv_wr, bad_recv_wr);
 }
 
 int ehca_post_srq_recv(struct ib_srq *srq,
-- 
1.5.5

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