From patchwork Tue Feb 16 09:44:48 2021 Content-Type: text/plain; charset="utf-8" MIME-Version: 1.0 Content-Transfer-Encoding: 7bit X-Patchwork-Submitter: Stefano Garzarella X-Patchwork-Id: 12089717 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=-15.8 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=ham 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 DF7BCC433E6 for ; Tue, 16 Feb 2021 09:47:56 +0000 (UTC) Received: from vger.kernel.org (vger.kernel.org [23.128.96.18]) by mail.kernel.org (Postfix) with ESMTP id B23C764DCF for ; Tue, 16 Feb 2021 09:47:56 +0000 (UTC) Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S230113AbhBPJrh (ORCPT ); Tue, 16 Feb 2021 04:47:37 -0500 Received: from us-smtp-delivery-124.mimecast.com ([216.205.24.124]:38790 "EHLO us-smtp-delivery-124.mimecast.com" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S230060AbhBPJrG (ORCPT ); Tue, 16 Feb 2021 04:47:06 -0500 DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=redhat.com; s=mimecast20190719; t=1613468740; 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=aKEudwAL0ABOP6RtR9S4wa4bhOuDErjR+HWjbOMiYD4=; b=DUb+tMgnBUKYLVZxauhNws1TvQ9V8Mct26pEGhIQ8NxDlGeCsRzQW1gZijKjbKpAf2p4s7 dpmm7nnp1tC9jJbbIRRMEaUtJHaQ4I+iRTLkwdBRR4XhCB+fAXUrL2LJoZx7hARrRkROcw F3T9T/T2iQ3MKXds+4xMJRBI8YfOJLs= 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-249-WHfg1IYJPuup6N6pV86-aQ-1; Tue, 16 Feb 2021 04:45:36 -0500 X-MC-Unique: WHfg1IYJPuup6N6pV86-aQ-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 AA36BAFA80; Tue, 16 Feb 2021 09:45:35 +0000 (UTC) Received: from steredhat.redhat.com (ovpn-113-212.ams2.redhat.com [10.36.113.212]) by smtp.corp.redhat.com (Postfix) with ESMTP id 569F0163F1; Tue, 16 Feb 2021 09:45:31 +0000 (UTC) From: Stefano Garzarella To: virtualization@lists.linux-foundation.org Cc: kvm@vger.kernel.org, linux-kernel@vger.kernel.org, "Michael S. Tsirkin" , Jason Wang Subject: [RFC PATCH 04/10] vdpa: remove param checks in the get/set_config callbacks Date: Tue, 16 Feb 2021 10:44:48 +0100 Message-Id: <20210216094454.82106-5-sgarzare@redhat.com> In-Reply-To: <20210216094454.82106-1-sgarzare@redhat.com> References: <20210216094454.82106-1-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: kvm@vger.kernel.org vdpa_get_config() and vdpa_set_config() now check parameters before calling callbacks, so we can remove these redundant checks. Signed-off-by: Stefano Garzarella --- drivers/vdpa/mlx5/net/mlx5_vnet.c | 3 +-- drivers/vdpa/vdpa_sim/vdpa_sim.c | 6 ------ 2 files changed, 1 insertion(+), 8 deletions(-) diff --git a/drivers/vdpa/mlx5/net/mlx5_vnet.c b/drivers/vdpa/mlx5/net/mlx5_vnet.c index 78043ee567b6..ab63dc9b8432 100644 --- a/drivers/vdpa/mlx5/net/mlx5_vnet.c +++ b/drivers/vdpa/mlx5/net/mlx5_vnet.c @@ -1825,8 +1825,7 @@ static void mlx5_vdpa_get_config(struct vdpa_device *vdev, unsigned int offset, struct mlx5_vdpa_dev *mvdev = to_mvdev(vdev); struct mlx5_vdpa_net *ndev = to_mlx5_vdpa_ndev(mvdev); - if (offset + len <= sizeof(struct virtio_net_config)) - memcpy(buf, (u8 *)&ndev->config + offset, len); + memcpy(buf, (u8 *)&ndev->config + offset, len); } static void mlx5_vdpa_set_config(struct vdpa_device *vdev, unsigned int offset, const void *buf, diff --git a/drivers/vdpa/vdpa_sim/vdpa_sim.c b/drivers/vdpa/vdpa_sim/vdpa_sim.c index 779ae6c144d7..392180c6f2cf 100644 --- a/drivers/vdpa/vdpa_sim/vdpa_sim.c +++ b/drivers/vdpa/vdpa_sim/vdpa_sim.c @@ -451,9 +451,6 @@ static void vdpasim_get_config(struct vdpa_device *vdpa, unsigned int offset, { struct vdpasim *vdpasim = vdpa_to_sim(vdpa); - if (offset + len > vdpasim->dev_attr.config_size) - return; - if (vdpasim->dev_attr.get_config) vdpasim->dev_attr.get_config(vdpasim, vdpasim->config); @@ -465,9 +462,6 @@ static void vdpasim_set_config(struct vdpa_device *vdpa, unsigned int offset, { struct vdpasim *vdpasim = vdpa_to_sim(vdpa); - if (offset + len > vdpasim->dev_attr.config_size) - return; - memcpy(vdpasim->config + offset, buf, len); if (vdpasim->dev_attr.set_config)