From patchwork Thu Sep 1 22:18:38 2022 Content-Type: text/plain; charset="utf-8" MIME-Version: 1.0 Content-Transfer-Encoding: 7bit X-Patchwork-Submitter: Michael Walle X-Patchwork-Id: 12963384 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 bombadil.infradead.org (bombadil.infradead.org [198.137.202.133]) (using TLSv1.2 with cipher ECDHE-RSA-AES256-GCM-SHA384 (256/256 bits)) (No client certificate requested) by smtp.lore.kernel.org (Postfix) with ESMTPS id EE733ECAAD3 for ; Thu, 1 Sep 2022 22:20:30 +0000 (UTC) DKIM-Signature: v=1; a=rsa-sha256; q=dns/txt; c=relaxed/relaxed; d=lists.infradead.org; s=bombadil.20210309; h=Sender: Content-Transfer-Encoding:Content-Type:List-Subscribe:List-Help:List-Post: List-Archive:List-Unsubscribe:List-Id:MIME-Version:References:In-Reply-To: Message-Id:Date:Subject:Cc:To:From:Reply-To:Content-ID:Content-Description: Resent-Date:Resent-From:Resent-Sender:Resent-To:Resent-Cc:Resent-Message-ID: List-Owner; bh=3pQNujddb7+FnCMPTnj9Q3efVlz62y6HaJkW5Nu4ZZk=; b=N4DYU1c+khlKvD uMwVnjS5pXcj9kEnCaZfILH/lj8E9+WcmN4eDySbUoJHDa46d2L4R3sXyHyCWtslg+/NIp03nK+1t AE6qWgaw+gbyK2Mnq4sEY1FELqmn3/1yGJ3H+LOBiJGtL0XFSYTTjP10s3n6rCFfqtcA9PdiRwRRR k1xwc55mWPcVnqx9ThMsXH6PSmzcydRlCHSiOd3uLdSuZjmxabecQXCB0DwQBFOBBeUC1KXXiFtju 5BT+TDRFMsPsmMq7A2Kfi1Dl7JuVPqo8IxxVQMedGnqw2WfJuNHSoW5uqXyZq5A1PK5FnI1L96KTZ ZIvldigbU217omT92G8g==; Received: from localhost ([::1] helo=bombadil.infradead.org) by bombadil.infradead.org with esmtp (Exim 4.94.2 #2 (Red Hat Linux)) id 1oTsWt-00FEdw-On; Thu, 01 Sep 2022 22:19:19 +0000 Received: from 0001.3ffe.de ([159.69.201.130] helo=mail.3ffe.de) by bombadil.infradead.org with esmtps (Exim 4.94.2 #2 (Red Hat Linux)) id 1oTsWq-00FEXQ-V4; Thu, 01 Sep 2022 22:19:18 +0000 Received: from mwalle01.kontron.local. (unknown [213.135.10.150]) (using TLSv1.3 with cipher TLS_AES_256_GCM_SHA384 (256/256 bits) key-exchange X25519 server-signature RSA-PSS (2048 bits) server-digest SHA256) (No client certificate requested) by mail.3ffe.de (Postfix) with ESMTPSA id DCC132010; Fri, 2 Sep 2022 00:19:07 +0200 (CEST) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=walle.cc; s=mail2022082101; t=1662070748; 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=wdjSL3TiHg3qFpviZsE8DP2S5RzCHH4DKzPfG+JMhKc=; b=MD31gvVbYo7tM0nTjHtSpj+l08HOGGoGiWF6xKQiUjq68ekoSRL++w3Q4T1lJIaMTgX8hF Dn5laG5VT2yoyNqpvBuuHnH9UOkfphV5B+jn0SWPSEQtuzaNQTUyx3LpNFWg6BdLDALDWL A35GGTTMPmhrr+ZwOnXXjVOnOkOGIPwDvNC8lubbocR1C/eu341/xSUSvXzs9SI37y9Icj LdLR/xMA+hRltry8fFAP7sKWHQhGLw1QJFAlpuMEyC9B7I5guVEGlhF+7zdY9BWGl04QW8 QVlnsB1qZcsPx+iuszGFE1ezn0hgNlyShJPek5X4+3wRG6nVgHKYv+2Kp27+cw== From: Michael Walle To: Miquel Raynal , Richard Weinberger , Vignesh Raghavendra , Rob Herring , Krzysztof Kozlowski , Srinivas Kandagatla , Shawn Guo , Li Yang , =?utf-8?b?UmFmYcWCIE1pxYJlY2tp?= , Frank Rowand Cc: linux-mtd@lists.infradead.org, devicetree@vger.kernel.org, linux-kernel@vger.kernel.org, linux-arm-kernel@lists.infradead.org, Ahmad Fatoum , Philipp Zabel , Michael Walle , Andrew Lunn , Jakub Kicinski Subject: [PATCH v2 01/20] net: add helper eth_addr_add() Date: Fri, 2 Sep 2022 00:18:38 +0200 Message-Id: <20220901221857.2600340-2-michael@walle.cc> X-Mailer: git-send-email 2.30.2 In-Reply-To: <20220901221857.2600340-1-michael@walle.cc> References: <20220901221857.2600340-1-michael@walle.cc> MIME-Version: 1.0 X-Spam: Yes X-CRM114-Version: 20100106-BlameMichelson ( TRE 0.8.0 (BSD) ) MR-646709E3 X-CRM114-CacheID: sfid-20220901_151917_191740_24BEA674 X-CRM114-Status: GOOD ( 10.09 ) X-BeenThere: linux-arm-kernel@lists.infradead.org X-Mailman-Version: 2.1.34 Precedence: list List-Id: List-Unsubscribe: , List-Archive: List-Post: List-Help: List-Subscribe: , Sender: "linux-arm-kernel" Errors-To: linux-arm-kernel-bounces+linux-arm-kernel=archiver.kernel.org@lists.infradead.org Add a helper to add an offset to a ethernet address. This comes in handy if you have a base ethernet address for multiple interfaces. Signed-off-by: Michael Walle Reviewed-by: Andrew Lunn Acked-by: Jakub Kicinski --- changes since v1: - none include/linux/etherdevice.h | 14 ++++++++++++++ 1 file changed, 14 insertions(+) diff --git a/include/linux/etherdevice.h b/include/linux/etherdevice.h index a541f0c4f146..f144cadbe99d 100644 --- a/include/linux/etherdevice.h +++ b/include/linux/etherdevice.h @@ -507,6 +507,20 @@ static inline void eth_addr_inc(u8 *addr) u64_to_ether_addr(u, addr); } +/** + * eth_addr_add() - Add (or subtract) and offset to/from the given MAC address. + * + * @offset: Offset to add. + * @addr: Pointer to a six-byte array containing Ethernet address to increment. + */ +static inline void eth_addr_add(u8 *addr, long offset) +{ + u64 u = ether_addr_to_u64(addr); + + u += offset; + u64_to_ether_addr(u, addr); +} + /** * is_etherdev_addr - Tell if given Ethernet address belongs to the device. * @dev: Pointer to a device structure