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: Aisheng Dong X-Patchwork-Id: 5251221 Return-Path: X-Original-To: patchwork-linux-arm@patchwork.kernel.org Delivered-To: patchwork-parsemail@patchwork1.web.kernel.org Received: from mail.kernel.org (mail.kernel.org [198.145.19.201]) by patchwork1.web.kernel.org (Postfix) with ESMTP id 372009F39B for ; Fri, 7 Nov 2014 09:54:12 +0000 (UTC) Received: from mail.kernel.org (localhost [127.0.0.1]) by mail.kernel.org (Postfix) with ESMTP id 702702012E for ; Fri, 7 Nov 2014 09:54:11 +0000 (UTC) Received: from bombadil.infradead.org (bombadil.infradead.org [198.137.202.9]) (using TLSv1.2 with cipher DHE-RSA-AES256-GCM-SHA384 (256/256 bits)) (No client certificate requested) by mail.kernel.org (Postfix) with ESMTPS id A092320107 for ; Fri, 7 Nov 2014 09:54:10 +0000 (UTC) Received: from localhost ([127.0.0.1] helo=bombadil.infradead.org) by bombadil.infradead.org with esmtp (Exim 4.80.1 #2 (Red Hat Linux)) id 1XmgD9-0008TJ-4o; Fri, 07 Nov 2014 09:52:07 +0000 Received: from mail-bl2on0142.outbound.protection.outlook.com ([65.55.169.142] helo=na01-bl2-obe.outbound.protection.outlook.com) by bombadil.infradead.org with esmtps (Exim 4.80.1 #2 (Red Hat Linux)) id 1XmgD6-0008Nx-Nr for linux-arm-kernel@lists.infradead.org; Fri, 07 Nov 2014 09:52:05 +0000 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: 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 X-CRM114-Version: 20100106-BlameMichelson ( TRE 0.8.0 (BSD) ) MR-646709E3 X-CRM114-CacheID: sfid-20141107_015204_842418_B534BBD2 X-CRM114-Status: UNSURE ( 5.03 ) X-CRM114-Notice: Please train this message. X-Spam-Score: -0.0 (/) Cc: netdev@vger.kernel.org, varkabhadram@gmail.com, mkl@pengutronix.de, linux-arm-kernel@lists.infradead.org, socketcan@hartkopp.net, b29396@freescale.com, wg@grandegger.com X-BeenThere: linux-arm-kernel@lists.infradead.org X-Mailman-Version: 2.1.18-1 Precedence: list List-Id: List-Unsubscribe: , List-Archive: List-Post: List-Help: List-Subscribe: , Sender: "linux-arm-kernel" Errors-To: linux-arm-kernel-bounces+patchwork-linux-arm=patchwork.kernel.org@lists.infradead.org X-Spam-Status: No, score=-2.5 required=5.0 tests=BAYES_00, RCVD_IN_DNSWL_NONE, RP_MATCHES_RCVD, UNPARSEABLE_RELAY autolearn=unavailable version=3.3.1 X-Spam-Checker-Version: SpamAssassin 3.3.1 (2010-03-16) on mail.kernel.org X-Virus-Scanned: ClamAV using ClamSMTP 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);