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| author | Mike Marciniszyn <mike.marciniszyn@intel.com> | 2019-06-13 08:30:52 -0400 |
|---|---|---|
| committer | Doug Ledford <dledford@redhat.com> | 2019-06-20 22:35:09 -0400 |
| commit | 4a9ceb7dbadf9e1435644b1f49720ee87431ce26 (patch) | |
| tree | 8a77c25eb30c30d7c27d6781cd3584c35ea1b3a8 /include/rdma | |
| parent | f56044d686c82bd31713fc0398d68e322813dc62 (diff) | |
| download | linux-stable-4a9ceb7dbadf9e1435644b1f49720ee87431ce26.tar.gz linux-stable-4a9ceb7dbadf9e1435644b1f49720ee87431ce26.tar.bz2 linux-stable-4a9ceb7dbadf9e1435644b1f49720ee87431ce26.zip | |
IB/{rdmavt, qib, hfi1}: Convert to new completion API
Convert all completions to use the new completion routine that
fixes a race between post send and completion where fields from
a SWQE can be read after SWQE has been freed.
This patch also addresses issues reported in
https://marc.info/?l=linux-kernel&m=155656897409107&w=2.
The reserved operation path has no need for any barrier.
The barrier for the other path is addressed by the
smp_load_acquire() barrier.
Cc: Andrea Parri <andrea.parri@amarulasolutions.com>
Reviewed-by: Michael J. Ruhl <michael.j.ruhl@intel.com>
Signed-off-by: Mike Marciniszyn <mike.marciniszyn@intel.com>
Signed-off-by: Dennis Dalessandro <dennis.dalessandro@intel.com>
Signed-off-by: Doug Ledford <dledford@redhat.com>
Diffstat (limited to 'include/rdma')
| -rw-r--r-- | include/rdma/rdmavt_qp.h | 36 |
1 files changed, 0 insertions, 36 deletions
diff --git a/include/rdma/rdmavt_qp.h b/include/rdma/rdmavt_qp.h index 6014f1766907..84d0f36afc2f 100644 --- a/include/rdma/rdmavt_qp.h +++ b/include/rdma/rdmavt_qp.h @@ -565,42 +565,6 @@ static inline void rvt_qp_wqe_unreserve( extern const enum ib_wc_opcode ib_rvt_wc_opcode[]; -/** - * rvt_qp_swqe_complete() - insert send completion - * @qp - the qp - * @wqe - the send wqe - * @status - completion status - * - * Insert a send completion into the completion - * queue if the qp indicates it should be done. - * - * See IBTA 10.7.3.1 for info on completion - * control. - */ -static inline void rvt_qp_swqe_complete( - struct rvt_qp *qp, - struct rvt_swqe *wqe, - enum ib_wc_opcode opcode, - enum ib_wc_status status) -{ - if (unlikely(wqe->wr.send_flags & RVT_SEND_RESERVE_USED)) - return; - if (!(qp->s_flags & RVT_S_SIGNAL_REQ_WR) || - (wqe->wr.send_flags & IB_SEND_SIGNALED) || - status != IB_WC_SUCCESS) { - struct ib_wc wc; - - memset(&wc, 0, sizeof(wc)); - wc.wr_id = wqe->wr.wr_id; - wc.status = status; - wc.opcode = opcode; - wc.qp = &qp->ibqp; - wc.byte_len = wqe->length; - rvt_cq_enter(ibcq_to_rvtcq(qp->ibqp.send_cq), &wc, - status != IB_WC_SUCCESS); - } -} - /* * Compare the lower 24 bits of the msn values. * Returns an integer <, ==, or > than zero. |