From 4a9ceb7dbadf9e1435644b1f49720ee87431ce26 Mon Sep 17 00:00:00 2001 From: Mike Marciniszyn Date: Thu, 13 Jun 2019 08:30:52 -0400 Subject: 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 Reviewed-by: Michael J. Ruhl Signed-off-by: Mike Marciniszyn Signed-off-by: Dennis Dalessandro Signed-off-by: Doug Ledford --- include/rdma/rdmavt_qp.h | 36 ------------------------------------ 1 file changed, 36 deletions(-) (limited to 'include') 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. -- cgit v1.2.1