From patchwork Mon Mar 15 16:34:39 2021 Content-Type: text/plain; charset="utf-8" MIME-Version: 1.0 Content-Transfer-Encoding: 7bit X-Patchwork-Submitter: Stefano Garzarella X-Patchwork-Id: 402380 Return-Path: X-Spam-Checker-Version: SpamAssassin 3.4.0 (2014-02-07) on aws-us-west-2-korg-lkml-1.web.codeaurora.org X-Spam-Level: X-Spam-Status: No, score=-16.0 required=3.0 tests=BAYES_00,DKIMWL_WL_HIGH, DKIM_SIGNED,DKIM_VALID,DKIM_VALID_AU,HEADER_FROM_DIFFERENT_DOMAINS, INCLUDES_CR_TRAILER, INCLUDES_PATCH, MAILING_LIST_MULTI, SPF_HELO_NONE, SPF_PASS autolearn=unavailable autolearn_force=no version=3.4.0 Received: from mail.kernel.org (mail.kernel.org [198.145.29.99]) by smtp.lore.kernel.org (Postfix) with ESMTP id 385E0C433E0 for ; Mon, 15 Mar 2021 16:36:19 +0000 (UTC) Received: from vger.kernel.org (vger.kernel.org [23.128.96.18]) by mail.kernel.org (Postfix) with ESMTP id F3D8164F2A for ; Mon, 15 Mar 2021 16:36:18 +0000 (UTC) Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S232946AbhCOQft (ORCPT ); Mon, 15 Mar 2021 12:35:49 -0400 Received: from us-smtp-delivery-124.mimecast.com ([216.205.24.124]:43699 "EHLO us-smtp-delivery-124.mimecast.com" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S232371AbhCOQfR (ORCPT ); Mon, 15 Mar 2021 12:35:17 -0400 DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=redhat.com; s=mimecast20190719; t=1615826116; h=from:from:reply-to:subject:subject:date:date:message-id:message-id: to:to:cc:cc:mime-version:mime-version: content-transfer-encoding:content-transfer-encoding: in-reply-to:in-reply-to:references:references; bh=iWEeA/FAS/KigzjoSRKMocKAAwvw80uXLY8wO5EAzzw=; b=QPLWHUIZ+DbMzwD9xI2tMgYKg0cVoPd6WhQSC3XYJWESNsHt6iRzkGCghIRK254Hodldw0 mAngwBTcqhC1l+f3yR+1EpadKxSj81OoMACbTf1+3Sn1URYjfPVlMcr72manG7I1SSNdpb 1j/+Tok8qY4d0Tv1Erq+YuJRD39ZkU8= Received: from mimecast-mx01.redhat.com (mimecast-mx01.redhat.com [209.132.183.4]) (Using TLS) by relay.mimecast.com with ESMTP id us-mta-19-MK1OfIRxP2On-Rg_H_soRQ-1; Mon, 15 Mar 2021 12:35:09 -0400 X-MC-Unique: MK1OfIRxP2On-Rg_H_soRQ-1 Received: from smtp.corp.redhat.com (int-mx08.intmail.prod.int.phx2.redhat.com [10.5.11.23]) (using TLSv1.2 with cipher AECDH-AES256-SHA (256/256 bits)) (No client certificate requested) by mimecast-mx01.redhat.com (Postfix) with ESMTPS id 0E9FD80006E; Mon, 15 Mar 2021 16:35:08 +0000 (UTC) Received: from steredhat.redhat.com (ovpn-114-1.ams2.redhat.com [10.36.114.1]) by smtp.corp.redhat.com (Postfix) with ESMTP id A3CE819D7C; Mon, 15 Mar 2021 16:35:05 +0000 (UTC) From: Stefano Garzarella To: virtualization@lists.linux-foundation.org Cc: netdev@vger.kernel.org, Xie Yongji , Laurent Vivier , Stefan Hajnoczi , linux-kernel@vger.kernel.org, Max Gurtovoy , Jason Wang , Parav Pandit , "Michael S. Tsirkin" , kvm@vger.kernel.org Subject: [PATCH v4 03/14] vringh: reset kiov 'consumed' field in __vringh_iov() Date: Mon, 15 Mar 2021 17:34:39 +0100 Message-Id: <20210315163450.254396-4-sgarzare@redhat.com> In-Reply-To: <20210315163450.254396-1-sgarzare@redhat.com> References: <20210315163450.254396-1-sgarzare@redhat.com> MIME-Version: 1.0 X-Scanned-By: MIMEDefang 2.84 on 10.5.11.23 Precedence: bulk List-ID: X-Mailing-List: netdev@vger.kernel.org __vringh_iov() overwrites the contents of riov and wiov, in fact it resets the 'i' and 'used' fields, but also the 'consumed' field should be reset to avoid an inconsistent state. Acked-by: Jason Wang Signed-off-by: Stefano Garzarella --- drivers/vhost/vringh.c | 4 ++-- 1 file changed, 2 insertions(+), 2 deletions(-) diff --git a/drivers/vhost/vringh.c b/drivers/vhost/vringh.c index f68122705719..bee63d68201a 100644 --- a/drivers/vhost/vringh.c +++ b/drivers/vhost/vringh.c @@ -290,9 +290,9 @@ __vringh_iov(struct vringh *vrh, u16 i, return -EINVAL; if (riov) - riov->i = riov->used = 0; + riov->i = riov->used = riov->consumed = 0; if (wiov) - wiov->i = wiov->used = 0; + wiov->i = wiov->used = wiov->consumed = 0; for (;;) { void *addr;