From mboxrd@z Thu Jan 1 00:00:00 1970 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 mail.kernel.org (mail.kernel.org [198.145.29.99]) by smtp.lore.kernel.org (Postfix) with ESMTP id 65D60C433F5 for ; Tue, 5 Oct 2021 15:53:32 +0000 (UTC) Received: from vger.kernel.org (vger.kernel.org [23.128.96.18]) by mail.kernel.org (Postfix) with ESMTP id 4885C6126A for ; Tue, 5 Oct 2021 15:53:32 +0000 (UTC) Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S236286AbhJEPzV (ORCPT ); Tue, 5 Oct 2021 11:55:21 -0400 Received: from mail.kernel.org ([198.145.29.99]:46820 "EHLO mail.kernel.org" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S236136AbhJEPzT (ORCPT ); Tue, 5 Oct 2021 11:55:19 -0400 Received: by mail.kernel.org (Postfix) with ESMTPSA id 46A7C6126A; Tue, 5 Oct 2021 15:53:28 +0000 (UTC) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/simple; d=kernel.org; s=k20201202; t=1633449208; bh=amDvMd98EybXh57eQgtw/X/sMUKqf8Xr+lZfSbERFwE=; h=From:To:Cc:Subject:Date:In-Reply-To:References:From; b=ZKtbaKyENUXXOSz8XosNkrBB6WTDSYpcPZoh2EZx2fZqOfvjvsxwlMc9psAOKLlmQ zZreEyi05TCVAGupymofj/uwgmX2Q7kwcAGsWBHlWHUfD1KgIWbevs8APGhgFUDa5j 3me0mBs2ue9F7oYxpQOoldoErW9VfRYIBIPU3q//KzSL6H3lmAgpXkWmy+KmZoCv7+ u91ZQSlfZD8MOnDZAfTBR8ES8iEm6tW2CYWiZT5rRQGLb3mpg4H+Rswolw6HGXJFRi Ti1amzriLNvSmcZ/qFZsHO2Mw24rx1eqyjr9xoMrhK4SGXm1f1rGXoGKBT6aU1Khjs aPh8EN/jea+pg== From: Jakub Kicinski To: davem@davemloft.net Cc: netdev@vger.kernel.org, gregkh@linuxfoundation.org, rafael@kernel.org, andrew@lunn.ch, hkallweit1@gmail.com, linux@armlinux.org.uk, robh+dt@kernel.org, frowand.list@gmail.com, heikki.krogerus@linux.intel.com, devicetree@vger.kernel.org, Jakub Kicinski Subject: [PATCH net-next 1/4] of: net: add a helper for loading netdev->dev_addr Date: Tue, 5 Oct 2021 08:53:18 -0700 Message-Id: <20211005155321.2966828-2-kuba@kernel.org> X-Mailer: git-send-email 2.31.1 In-Reply-To: <20211005155321.2966828-1-kuba@kernel.org> References: <20211005155321.2966828-1-kuba@kernel.org> MIME-Version: 1.0 Content-Transfer-Encoding: 8bit Precedence: bulk List-ID: X-Mailing-List: netdev@vger.kernel.org Commit 406f42fa0d3c ("net-next: When a bond have a massive amount of VLANs...") introduced a rbtree for faster Ethernet address look up. To maintain netdev->dev_addr in this tree we need to make all the writes to it got through appropriate helpers. There are roughly 40 places where netdev->dev_addr is passed as the destination to a of_get_mac_address() call. Add a helper which takes a dev pointer instead, so it can call an appropriate helper. Note that of_get_mac_address() already assumes the address is 6 bytes long (ETH_ALEN) so use eth_hw_addr_set(). Signed-off-by: Jakub Kicinski --- drivers/of/of_net.c | 25 +++++++++++++++++++++++++ include/linux/of_net.h | 6 ++++++ 2 files changed, 31 insertions(+) diff --git a/drivers/of/of_net.c b/drivers/of/of_net.c index dbac3a172a11..f1a9bf7578e7 100644 --- a/drivers/of/of_net.c +++ b/drivers/of/of_net.c @@ -143,3 +143,28 @@ int of_get_mac_address(struct device_node *np, u8 *addr) return of_get_mac_addr_nvmem(np, addr); } EXPORT_SYMBOL(of_get_mac_address); + +/** + * of_get_ethdev_address() + * @np: Caller's Device Node + * @dev: Pointer to netdevice which address will be updated + * + * Search the device tree for the best MAC address to use. + * If found set @dev->dev_addr to that address. + * + * See documentation of of_get_mac_address() for more information on how + * the best address is determined. + * + * Return: 0 on success and errno in case of error. + */ +int of_get_ethdev_address(struct device_node *np, struct net_device *dev) +{ + u8 addr[ETH_ALEN]; + int ret; + + ret = of_get_mac_address(np, addr); + if (!ret) + eth_hw_addr_set(dev, addr); + return ret; +} +EXPORT_SYMBOL(of_get_ethdev_address); diff --git a/include/linux/of_net.h b/include/linux/of_net.h index daef3b0d9270..314b9accd98c 100644 --- a/include/linux/of_net.h +++ b/include/linux/of_net.h @@ -14,6 +14,7 @@ struct net_device; extern int of_get_phy_mode(struct device_node *np, phy_interface_t *interface); extern int of_get_mac_address(struct device_node *np, u8 *mac); +int of_get_ethdev_address(struct device_node *np, struct net_device *dev); extern struct net_device *of_find_net_device_by_node(struct device_node *np); #else static inline int of_get_phy_mode(struct device_node *np, @@ -27,6 +28,11 @@ static inline int of_get_mac_address(struct device_node *np, u8 *mac) return -ENODEV; } +static inline int of_get_ethdev_address(struct device_node *np, struct net_device *dev) +{ + return -ENODEV; +} + static inline struct net_device *of_find_net_device_by_node(struct device_node *np) { return NULL; -- 2.31.1