[PATCH] IB/ipath: ignore receive queue size if SRQ is specified

The receive work queue size should be ignored if the QP is created to use a
shared receive queue according to the IB spec.

Signed-off-by: Ralph Campbell <ralph.campbell@qlogic.com>
Signed-off-by: Bryan O'Sullivan <bryan.osullivan@qlogic.com>
Cc: "Michael S. Tsirkin" <mst@mellanox.co.il>
Cc: Roland Dreier <rolandd@cisco.com>
Signed-off-by: Andrew Morton <akpm@osdl.org>
Signed-off-by: Linus Torvalds <torvalds@osdl.org>

1 files changed, 16 insertions, 11 deletions

diff --git a/drivers/infiniband/hw/ipath/ipath_qp.c b/drivers/infiniband/hw/ipath/ipath_qp.c
index 68f01513214f..a77a0dad0fa0 100644
--- a/drivers/infiniband/hw/ipath/ipath_qp.c
+++ b/drivers/infiniband/hw/ipath/ipath_qp.c
@@ -685,16 +685,22 @@ struct ib_qp *ipath_create_qp(struct ib_pd *ibpd,
                         ret = ERR_PTR(-ENOMEM);
                         goto bail;
                 }
-                qp->r_rq.size = init_attr->cap.max_recv_wr + 1;
-                sz = sizeof(struct ipath_sge) *
-                        init_attr->cap.max_recv_sge +
-                        sizeof(struct ipath_rwqe);
-                qp->r_rq.wq = vmalloc(qp->r_rq.size * sz);
-                if (!qp->r_rq.wq) {
-                        kfree(qp);
-                        vfree(swq);
-                        ret = ERR_PTR(-ENOMEM);
-                        goto bail;
+                if (init_attr->srq) {
+                        qp->r_rq.size = 0;
+                        qp->r_rq.max_sge = 0;
+                        qp->r_rq.wq = NULL;
+                } else {
+                        qp->r_rq.size = init_attr->cap.max_recv_wr + 1;
+                        qp->r_rq.max_sge = init_attr->cap.max_recv_sge;
+                        sz = (sizeof(struct ipath_sge) * qp->r_rq.max_sge) +
+                                sizeof(struct ipath_rwqe);
+                        qp->r_rq.wq = vmalloc(qp->r_rq.size * sz);
+                        if (!qp->r_rq.wq) {
+                                kfree(qp);
+                                vfree(swq);
+                                ret = ERR_PTR(-ENOMEM);
+                                goto bail;
+                        }
                 }
 
                 /*
@@ -713,7 +719,6 @@ struct ib_qp *ipath_create_qp(struct ib_pd *ibpd,
                 qp->s_wq = swq;
                 qp->s_size = init_attr->cap.max_send_wr + 1;
                 qp->s_max_sge = init_attr->cap.max_send_sge;
-                qp->r_rq.max_sge = init_attr->cap.max_recv_sge;
                 qp->s_flags = init_attr->sq_sig_type == IB_SIGNAL_REQ_WR ?
                         1 << IPATH_S_SIGNAL_REQ_WR : 0;
                 dev = to_idev(ibpd->device);