4.14-stable review patch. If anyone has any objections, please let me know.
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[ Upstream commit ca95f802ef5139722acc8d30aeaab6fe5bbe939e ]
Currently, When a reserved operation is completed, its entry in the send queue will not be unreserved, which leads to the miscalculation of qp->s_avail and thus the triggering of a WARN_ON call trace. This patch fixes the problem by unreserving the reserved operation when it is completed.
Fixes: 856cc4c237ad ("IB/hfi1: Add the capability for reserved operations") Reviewed-by: Mike Marciniszyn mike.marciniszyn@intel.com Signed-off-by: Kaike Wan kaike.wan@intel.com Signed-off-by: Dennis Dalessandro dennis.dalessandro@intel.com Signed-off-by: Jason Gunthorpe jgg@mellanox.com Signed-off-by: Sasha Levin sashal@kernel.org --- drivers/infiniband/hw/hfi1/rc.c | 2 ++ 1 file changed, 2 insertions(+)
diff --git a/drivers/infiniband/hw/hfi1/rc.c b/drivers/infiniband/hw/hfi1/rc.c index 818bac1a4056..d3b8cb92fd6d 100644 --- a/drivers/infiniband/hw/hfi1/rc.c +++ b/drivers/infiniband/hw/hfi1/rc.c @@ -1162,6 +1162,7 @@ void hfi1_rc_send_complete(struct rvt_qp *qp, struct hfi1_opa_header *opah) if (cmp_psn(wqe->lpsn, qp->s_sending_psn) >= 0 && cmp_psn(qp->s_sending_psn, qp->s_sending_hpsn) <= 0) break; + rvt_qp_wqe_unreserve(qp, wqe); s_last = qp->s_last; trace_hfi1_qp_send_completion(qp, wqe, s_last); if (++s_last >= qp->s_size) @@ -1214,6 +1215,7 @@ static struct rvt_swqe *do_rc_completion(struct rvt_qp *qp, u32 s_last;
rvt_put_swqe(wqe); + rvt_qp_wqe_unreserve(qp, wqe); s_last = qp->s_last; trace_hfi1_qp_send_completion(qp, wqe, s_last); if (++s_last >= qp->s_size)