From mboxrd@z Thu Jan 1 00:00:00 1970 From: Selvin Xavier Subject: [PATCH 4/4] RDMA/bnxt_re: synchronize poll_cq and req_notify_cq verbs Date: Mon, 6 Nov 2017 08:07:32 -0800 Message-ID: <1509984452-18336-5-git-send-email-selvin.xavier@broadcom.com> References: <1509984452-18336-1-git-send-email-selvin.xavier@broadcom.com> Return-path: In-Reply-To: <1509984452-18336-1-git-send-email-selvin.xavier-dY08KVG/lbpWk0Htik3J/w@public.gmane.org> Sender: linux-rdma-owner-u79uwXL29TY76Z2rM5mHXA@public.gmane.org To: dledford-H+wXaHxf7aLQT0dZR+AlfA@public.gmane.org Cc: linux-rdma-u79uwXL29TY76Z2rM5mHXA@public.gmane.org, Selvin Xavier List-Id: linux-rdma@vger.kernel.org Synchronize poll_cq and req_notify_cq verbs using cq_lock, instead of the lower level qplib->hwq.lock. Signed-off-by: Selvin Xavier --- drivers/infiniband/hw/bnxt_re/ib_verbs.c | 15 ++++++++++----- 1 file changed, 10 insertions(+), 5 deletions(-) diff --git a/drivers/infiniband/hw/bnxt_re/ib_verbs.c b/drivers/infiniband/hw/bnxt_re/ib_verbs.c index 96ec797..d5770aa 100644 --- a/drivers/infiniband/hw/bnxt_re/ib_verbs.c +++ b/drivers/infiniband/hw/bnxt_re/ib_verbs.c @@ -2999,8 +2999,10 @@ int bnxt_re_req_notify_cq(struct ib_cq *ib_cq, enum ib_cq_notify_flags ib_cqn_flags) { struct bnxt_re_cq *cq = container_of(ib_cq, struct bnxt_re_cq, ib_cq); - int type = 0; + int type = 0, rc = 0; + unsigned long flags; + spin_lock_irqsave(&cq->cq_lock, flags); /* Trigger on the very next completion */ if (ib_cqn_flags & IB_CQ_NEXT_COMP) type = DBR_DBR_TYPE_CQ_ARMALL; @@ -3010,12 +3012,15 @@ int bnxt_re_req_notify_cq(struct ib_cq *ib_cq, /* Poll to see if there are missed events */ if ((ib_cqn_flags & IB_CQ_REPORT_MISSED_EVENTS) && - !(bnxt_qplib_is_cq_empty(&cq->qplib_cq))) - return 1; - + !(bnxt_qplib_is_cq_empty(&cq->qplib_cq))) { + rc = 1; + goto exit; + } bnxt_qplib_req_notify_cq(&cq->qplib_cq, type); - return 0; +exit: + spin_unlock_irqrestore(&cq->cq_lock, flags); + return rc; } /* Memory Regions */ -- 2.5.5 -- To unsubscribe from this list: send the line "unsubscribe linux-rdma" in the body of a message to majordomo-u79uwXL29TY76Z2rM5mHXA@public.gmane.org More majordomo info at http://vger.kernel.org/majordomo-info.html