From mboxrd@z Thu Jan 1 00:00:00 1970 From: Xiao Wang Subject: [PATCH v2] net/ifc: do not notify before HW ready Date: Fri, 14 Sep 2018 09:25:17 +0800 Message-ID: <20180914012517.44977-1-xiao.w.wang@intel.com> References: <20180910110531.138449-1-xiao.w.wang@intel.com> Cc: tiwei.bie@intel.com, dev@dpdk.org, Xiao Wang To: xiaolong.ye@intel.com Return-path: Received: from mga03.intel.com (mga03.intel.com [134.134.136.65]) by dpdk.org (Postfix) with ESMTP id BB26D5F65 for ; Fri, 14 Sep 2018 03:32:07 +0200 (CEST) In-Reply-To: <20180910110531.138449-1-xiao.w.wang@intel.com> List-Id: DPDK patches and discussions List-Unsubscribe: , List-Archive: List-Post: List-Help: List-Subscribe: , Errors-To: dev-bounces@dpdk.org Sender: "dev" If the device is not clearly reset by the previous driver and holds some invalid ring addr, and the relay thread kicks it before HW is properly re-configured, a bad DMA request may happen. Besides, the notify_addr which is used by the relay thread is set in the vdpa_ifcvf_start function, if a kick relay happens before vdpa_ifcvf_start finishes, a null addr is accessed. Fixes: a3f8150eac6d ("net/ifcvf: add ifcvf vDPA driver") Signed-off-by: Xiao Wang --- v2: * Add description for the fix in the commit log. --- drivers/net/ifc/ifcvf_vdpa.c | 8 ++++---- 1 file changed, 4 insertions(+), 4 deletions(-) diff --git a/drivers/net/ifc/ifcvf_vdpa.c b/drivers/net/ifc/ifcvf_vdpa.c index 3c5430dc0..7d3085d8d 100644 --- a/drivers/net/ifc/ifcvf_vdpa.c +++ b/drivers/net/ifc/ifcvf_vdpa.c @@ -503,11 +503,11 @@ update_datapath(struct ifcvf_internal *internal) if (ret) goto err; - ret = setup_notify_relay(internal); + ret = vdpa_ifcvf_start(internal); if (ret) goto err; - ret = vdpa_ifcvf_start(internal); + ret = setup_notify_relay(internal); if (ret) goto err; @@ -515,12 +515,12 @@ update_datapath(struct ifcvf_internal *internal) } else if (rte_atomic32_read(&internal->running) && (!rte_atomic32_read(&internal->started) || !rte_atomic32_read(&internal->dev_attached))) { - vdpa_ifcvf_stop(internal); - ret = unset_notify_relay(internal); if (ret) goto err; + vdpa_ifcvf_stop(internal); + ret = vdpa_disable_vfio_intr(internal); if (ret) goto err; -- 2.15.1