From patchwork Fri Nov 7 08:45:12 2014 Content-Type: text/plain; charset="utf-8" MIME-Version: 1.0 Content-Transfer-Encoding: 7bit X-Patchwork-Submitter: Dong Aisheng X-Patchwork-Id: 408016 X-Patchwork-Delegate: davem@davemloft.net Return-Path: X-Original-To: patchwork-incoming@ozlabs.org Delivered-To: patchwork-incoming@ozlabs.org Received: from vger.kernel.org (vger.kernel.org [209.132.180.67]) by ozlabs.org (Postfix) with ESMTP id 8EDC51400B7 for ; Fri, 7 Nov 2014 20:51:52 +1100 (AEDT) Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S1751259AbaKGJvr (ORCPT ); Fri, 7 Nov 2014 04:51:47 -0500 Received: from mail-bl2on0146.outbound.protection.outlook.com ([65.55.169.146]:40908 "EHLO na01-bl2-obe.outbound.protection.outlook.com" rhost-flags-OK-OK-OK-FAIL) by vger.kernel.org with ESMTP id S1751209AbaKGJvo (ORCPT ); Fri, 7 Nov 2014 04:51:44 -0500 Received: from DM2PR03CA0007.namprd03.prod.outlook.com (10.141.96.17) by BLUPR03MB325.namprd03.prod.outlook.com (10.141.48.14) with Microsoft SMTP Server (TLS) id 15.1.11.9; Fri, 7 Nov 2014 09:51:41 +0000 Received: from BN1AFFO11FD012.protection.gbl (2a01:111:f400:7c10::121) by DM2PR03CA0007.outlook.office365.com (2a01:111:e400:2428::17) with Microsoft SMTP Server (TLS) id 15.1.16.15 via Frontend Transport; Fri, 7 Nov 2014 09:51:41 +0000 Received: from tx30smr01.am.freescale.net (192.88.168.50) by BN1AFFO11FD012.mail.protection.outlook.com (10.58.52.72) with Microsoft SMTP Server (TLS) id 15.1.6.13 via Frontend Transport; Fri, 7 Nov 2014 09:51:40 +0000 Received: from shlinux2.ap.freescale.net (shlinux2.ap.freescale.net [10.192.224.44]) by tx30smr01.am.freescale.net (8.14.3/8.14.0) with ESMTP id sA79pY4p011332; Fri, 7 Nov 2014 02:51:36 -0700 From: Dong Aisheng To: CC: , , , , , , Subject: [PATCH V4 1/3] can: add can_is_canfd_skb() API Date: Fri, 7 Nov 2014 16:45:12 +0800 Message-ID: <1415349914-9145-1-git-send-email-b29396@freescale.com> X-Mailer: git-send-email 1.9.1 X-EOPAttributedMessage: 0 X-Forefront-Antispam-Report: CIP:192.88.168.50; CTRY:US; IPV:NLI; EFV:NLI; SFV:NSPM; SFS:(10019020)(6009001)(189002)(199003)(19580395003)(47776003)(20776003)(19580405001)(44976005)(21056001)(93916002)(89996001)(46102003)(88136002)(97736003)(92566001)(77156002)(84676001)(120916001)(92726001)(36756003)(33646002)(87936001)(99396003)(87286001)(68736004)(64706001)(105606002)(110136001)(95666004)(50466002)(104166001)(50226001)(106466001)(229853001)(48376002)(31966008)(104016003)(102836001)(62966003)(50986999)(4396001)(2351001)(107046002)(6806004)(42262002); DIR:OUT; SFP:1102; SCL:1; SRVR:BLUPR03MB325; H:tx30smr01.am.freescale.net; FPR:; MLV:sfv; PTR:InfoDomainNonexistent; MX:1; A:1; LANG:en; MIME-Version: 1.0 X-Microsoft-Antispam: UriScan:; X-Microsoft-Antispam: BCL:0;PCL:0;RULEID:;SRVR:BLUPR03MB325; X-Exchange-Antispam-Report-Test: UriScan:; X-Forefront-PRVS: 03883BD916 Received-SPF: Fail (protection.outlook.com: domain of freescale.com does not designate 192.88.168.50 as permitted sender) receiver=protection.outlook.com; client-ip=192.88.168.50; helo=tx30smr01.am.freescale.net; Authentication-Results: spf=fail (sender IP is 192.88.168.50) smtp.mailfrom=Aisheng.Dong@freescale.com; X-OriginatorOrg: freescale.com Sender: netdev-owner@vger.kernel.org Precedence: bulk List-ID: X-Mailing-List: netdev@vger.kernel.org The CAN device drivers can use it to check if the frame to send is on CAN FD mode or normal CAN mode. Acked-by: Oliver Hartkopp Signed-off-by: Dong Aisheng --- ChangesLog: * v3->v4: add comments and change prototype a bit * v1->v2: change to skb->len == CANFD_MTU; --- include/linux/can/dev.h | 6 ++++++ 1 file changed, 6 insertions(+) diff --git a/include/linux/can/dev.h b/include/linux/can/dev.h index 6992afc..b37ea95 100644 --- a/include/linux/can/dev.h +++ b/include/linux/can/dev.h @@ -99,6 +99,12 @@ inval_skb: return 1; } +static inline bool can_is_canfd_skb(const struct sk_buff *skb) +{ + /* the CAN specific type of skb is identified by its data length */ + return skb->len == CANFD_MTU; +} + /* get data length from can_dlc with sanitized can_dlc */ u8 can_dlc2len(u8 can_dlc);