From patchwork Mon Dec 13 16:10:58 2021 Content-Type: text/plain; charset="utf-8" MIME-Version: 1.0 Content-Transfer-Encoding: 7bit X-Patchwork-Submitter: Vincent Mailhol X-Patchwork-Id: 12674203 X-Patchwork-Delegate: kuba@kernel.org Return-Path: X-Spam-Checker-Version: SpamAssassin 3.4.0 (2014-02-07) on aws-us-west-2-korg-lkml-1.web.codeaurora.org Received: from vger.kernel.org (vger.kernel.org [23.128.96.18]) by smtp.lore.kernel.org (Postfix) with ESMTP id 87805C433EF for ; Mon, 13 Dec 2021 16:11:18 +0000 (UTC) Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S240495AbhLMQLR (ORCPT ); Mon, 13 Dec 2021 11:11:17 -0500 Received: from smtp04.smtpout.orange.fr ([80.12.242.126]:53572 "EHLO smtp.smtpout.orange.fr" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S240490AbhLMQLQ (ORCPT ); Mon, 13 Dec 2021 11:11:16 -0500 Received: from localhost.localdomain ([106.133.22.31]) by smtp.orange.fr with ESMTPA id wnuom1qs4k3HQwnuxmkP2j; Mon, 13 Dec 2021 17:11:15 +0100 X-ME-Helo: localhost.localdomain X-ME-Auth: MDU0YmViZGZmMDIzYiBlMiM2NTczNTRjNWZkZTMwOGRiOGQ4ODf3NWI1ZTMyMzdiODlhOQ== X-ME-Date: Mon, 13 Dec 2021 17:11:15 +0100 X-ME-IP: 106.133.22.31 From: Vincent Mailhol To: Marc Kleine-Budde , linux-can@vger.kernel.org Cc: netdev@vger.kernel.org, linux-kernel@vger.kernel.org, Vincent Mailhol , Lukas Magel Subject: [RESEND PATCH v1] can: etas_es58x: es58x_init_netdev: populate net_device::dev_port Date: Tue, 14 Dec 2021 01:10:58 +0900 Message-Id: <20211213161058.56599-1-mailhol.vincent@wanadoo.fr> X-Mailer: git-send-email 2.32.0 In-Reply-To: <20211029111829.crrwdjizlflzzhq2@pengutronix.de> References: <20211029111829.crrwdjizlflzzhq2@pengutronix.de> MIME-Version: 1.0 Precedence: bulk List-ID: X-Mailing-List: netdev@vger.kernel.org X-Patchwork-Delegate: kuba@kernel.org The field dev_port of struct net_device indicates the port number of a network device [1]. This patch populates this field. This field can be helpful to distinguish between the two network interfaces of a dual channel device (i.e. ES581.4 or ES582.1). Indeed, at the moment, all the network interfaces of a same device share the same static udev attributes c.f. output of: | udevadm info --attribute-walk /sys/class/net/canX The dev_port attribute can then be used to write some udev rules to, for example, assign a permanent name to each network interface based on the serial/dev_port pair (which is convenient when you have a test bench with several CAN devices connected simultaneously and wish to keep consistent interface names upon reboot). [1] https://www.kernel.org/doc/Documentation/ABI/testing/sysfs-class-net Suggested-by: Lukas Magel Signed-off-by: Vincent Mailhol --- Hi Marc, At one point, this patch was applied to linux-can-next/testing but was then removed. I guess it just went off your radar. Resending it :) Yours sincerely, Vincent Mailhol --- drivers/net/can/usb/etas_es58x/es58x_core.c | 1 + 1 file changed, 1 insertion(+) diff --git a/drivers/net/can/usb/etas_es58x/es58x_core.c b/drivers/net/can/usb/etas_es58x/es58x_core.c index 96a13c770e4a..403de7e9d084 100644 --- a/drivers/net/can/usb/etas_es58x/es58x_core.c +++ b/drivers/net/can/usb/etas_es58x/es58x_core.c @@ -2096,6 +2096,7 @@ static int es58x_init_netdev(struct es58x_device *es58x_dev, int channel_idx) netdev->netdev_ops = &es58x_netdev_ops; netdev->flags |= IFF_ECHO; /* We support local echo */ + netdev->dev_port = channel_idx; ret = register_candev(netdev); if (ret)