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authorKumar Sanghvi <kumaras@chelsio.com>2011-10-13 04:21:30 -0400
committerRoland Dreier <roland@purestorage.com>2011-10-14 17:23:04 -0400
commit01e7da6ba53ca4d6189a1eae45607c0331c871f2 (patch)
tree01cf49e2294c455d0ee2536d47e9d2e5550057ec /drivers/infiniband
parent9efe10a1e1a1ab1dba0af0f520e0697f6e81ebf1 (diff)
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: Kumar Sanghvi <kumaras@chelsio.com> Acked-by: Steve Wise <swise@opengridcomputing.com> Signed-off-by: Roland Dreier <roland@purestorage.com>
Diffstat (limited to 'drivers/infiniband')
-rw-r--r--drivers/infiniband/hw/cxgb4/qp.c6
1 files changed, 5 insertions, 1 deletions
diff --git a/drivers/infiniband/hw/cxgb4/qp.c b/drivers/infiniband/hw/cxgb4/qp.c
index a41578e48c7b..892fa7c6d310 100644
--- a/drivers/infiniband/hw/cxgb4/qp.c
+++ b/drivers/infiniband/hw/cxgb4/qp.c
@@ -966,8 +966,12 @@ static void flush_qp(struct c4iw_qp *qhp)
966 if (qhp->ibqp.uobject) { 966 if (qhp->ibqp.uobject) {
967 t4_set_wq_in_error(&qhp->wq); 967 t4_set_wq_in_error(&qhp->wq);
968 t4_set_cq_in_error(&rchp->cq); 968 t4_set_cq_in_error(&rchp->cq);
969 if (schp != rchp) 969 (*rchp->ibcq.comp_handler)(&rchp->ibcq, rchp->ibcq.cq_context);
970 if (schp != rchp) {
970 t4_set_cq_in_error(&schp->cq); 971 t4_set_cq_in_error(&schp->cq);
972 (*schp->ibcq.comp_handler)(&schp->ibcq,
973 schp->ibcq.cq_context);
974 }
971 return; 975 return;
972 } 976 }
973 __flush_qp(qhp, rchp, schp); 977 __flush_qp(qhp, rchp, schp);