From mboxrd@z Thu Jan 1 00:00:00 1970 Return-Path: Received: from mga02.intel.com (mga02.intel.com [134.134.136.20]) by dpdk.org (Postfix) with ESMTP id A605F1B4AA; Thu, 11 Oct 2018 16:26:25 +0200 (CEST) X-Amp-Result: SKIPPED(no attachment in message) X-Amp-File-Uploaded: False Received: from fmsmga007.fm.intel.com ([10.253.24.52]) by orsmga101.jf.intel.com with ESMTP/TLS/DHE-RSA-AES256-GCM-SHA384; 11 Oct 2018 07:26:24 -0700 X-ExtLoop1: 1 X-IronPort-AV: E=Sophos;i="5.54,368,1534834800"; d="scan'208";a="77257687" Received: from btwcube1.sh.intel.com ([10.67.104.158]) by fmsmga007.fm.intel.com with ESMTP; 11 Oct 2018 07:24:01 -0700 From: Tiwei Bie To: maxime.coquelin@redhat.com, zhihong.wang@intel.com, dev@dpdk.org Cc: mst@redhat.com, jasowang@redhat.com, stable@dpdk.org Date: Thu, 11 Oct 2018 22:22:34 +0800 Message-Id: <20181011142234.17823-1-tiwei.bie@intel.com> X-Mailer: git-send-email 2.19.1 In-Reply-To: <20181011130655.5485-1-tiwei.bie@intel.com> References: <20181011130655.5485-1-tiwei.bie@intel.com> MIME-Version: 1.0 Content-Transfer-Encoding: 8bit Subject: [dpdk-stable] [PATCH v2] vhost: fix notification for packed ring X-BeenThere: stable@dpdk.org X-Mailman-Version: 2.1.15 Precedence: list List-Id: patches for DPDK stable branches List-Unsubscribe: , List-Archive: List-Post: List-Help: List-Subscribe: , X-List-Received-Date: Thu, 11 Oct 2018 14:26:26 -0000 The notification can't be disabled in packed ring when application tries to disable notification, because the device event flags field is overwritten by an unexpected value. This patch fixes this issue. Fixes: b1cce26af1dc ("vhost: add notification for packed ring") Cc: stable@dpdk.org Signed-off-by: Tiwei Bie Reviewed-by: Michael S. Tsirkin --- v2: return directly after disabling the interrupt (Jason/MST) lib/librte_vhost/vhost.c | 4 +++- 1 file changed, 3 insertions(+), 1 deletion(-) diff --git a/lib/librte_vhost/vhost.c b/lib/librte_vhost/vhost.c index e62f4c594..047ee535c 100644 --- a/lib/librte_vhost/vhost.c +++ b/lib/librte_vhost/vhost.c @@ -667,8 +667,10 @@ vhost_enable_notify_packed(struct virtio_net *dev, { uint16_t flags; - if (!enable) + if (!enable) { vq->device_event->flags = VRING_EVENT_F_DISABLE; + return; + } flags = VRING_EVENT_F_ENABLE; if (dev->features & (1ULL << VIRTIO_RING_F_EVENT_IDX)) { -- 2.19.1