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RDMA/cxgb4: Make sure flush CQ entries are collected on connection close

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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>
This commit is contained in:
Kumar Sanghvi 2011-10-13 13:51:30 +05:30 committed by Roland Dreier
parent 9efe10a1e1
commit 01e7da6ba5
1 changed files with 5 additions and 1 deletions
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6
drivers/infiniband/hw/cxgb4/qp.c
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@ -966,8 +966,12 @@ static void flush_qp(struct c4iw_qp *qhp)
if (qhp->ibqp.uobject) { if (qhp->ibqp.uobject) {
t4_set_wq_in_error(&qhp->wq); t4_set_wq_in_error(&qhp->wq);
t4_set_cq_in_error(&rchp->cq); 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); t4_set_cq_in_error(&schp->cq);
(*schp->ibcq.comp_handler)(&schp->ibcq,
schp->ibcq.cq_context);
}
return; return;
} }
__flush_qp(qhp, rchp, schp); __flush_qp(qhp, rchp, schp);