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Commit 01e7da6b authored by Kumar Sanghvi's avatar Kumar Sanghvi Committed by Roland Dreier
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RDMA/cxgb4: Make sure flush CQ entries are collected on connection close 



At the time when a peer closes the connection, iw_cxgb4 will not send
a cq event if ibqp.uobject exists.  In that case, its possible for a
user application to get blocked in ibv_get_cq_event().

To resolve this, call the cq's comp_handler to unblock any read from
ibv_get_cq_event().  This will trigger userspace to poll the cq and
collect flush status completions for any pending work requests.

Signed-off-by: default avatarKumar Sanghvi <kumaras@chelsio.com>
Acked-by: default avatarSteve Wise <swise@opengridcomputing.com>
Signed-off-by: default avatarRoland Dreier <roland@purestorage.com>
parent 9efe10a1

drivers/infiniband/hw/cxgb4/qp.c

+5 −1
Original line number Diff line number Diff line
@@ -966,8 +966,12 @@ static void flush_qp(struct c4iw_qp *qhp) 
	if (qhp->ibqp.uobject) {

		t4_set_wq_in_error(&qhp->wq);

		t4_set_cq_in_error(&rchp->cq);

		if (schp != rchp)

		(*rchp->ibcq.comp_handler)(&rchp->ibcq, rchp->ibcq.cq_context);

		if (schp != rchp) {

			t4_set_cq_in_error(&schp->cq);

			(*schp->ibcq.comp_handler)(&schp->ibcq,

					schp->ibcq.cq_context);

		}

		return;

	}

	__flush_qp(qhp, rchp, schp);