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authorKumar Sanghvi <kumaras@chelsio.com>2011-10-13 12:21:30 +0400
committerRoland Dreier <roland@purestorage.com>2011-10-15 01:23:04 +0400
commit01e7da6ba53ca4d6189a1eae45607c0331c871f2 (patch)
tree01cf49e2294c455d0ee2536d47e9d2e5550057ec /drivers/infiniband
parent9efe10a1e1a1ab1dba0af0f520e0697f6e81ebf1 (diff)
downloadlinux-01e7da6ba53ca4d6189a1eae45607c0331c871f2.tar.xz
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)
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);