From patchwork Thu Aug 25 21:44:10 2022 Content-Type: text/plain; charset="utf-8" MIME-Version: 1.0 Content-Transfer-Encoding: 7bit X-Patchwork-Submitter: Michael Walle X-Patchwork-Id: 12955260 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 1265EECAAA3 for ; Thu, 25 Aug 2022 21:45:53 +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=U9b0QW1t0F0Ct65sbPKBE12x3RyTsp/2o02lJShAibI=; b=gsazZQTg8HESOx vnnnfXSy0bZ3l5LE/i5HJDLkcFyZOxHX4NNPBSvbohawAyZPQVsVBi6qubFF1dOLv9kYDHxw36xq9 VqYYyMm6q9Hkw99oZ1ZW8cHrIARzJDb7+c8pstSajNT1uhziCVR9xLmnqSNpRJvBhAcFSdX66HZTU G6gFW1NUboN6TI+DVmNPjT7CbYzyz9ouQeXE+A7eMwbGEMWVRbhYtnCtfMj7Q4Feejs7OZ+TiPV3c dNE/OeJdPnuDvXULDSuN8ZBHbULBHLLI3fRIRJgv0q9thCNvTabDnJU4F/rfDYwUGT50WNrW1fIwz qVz6/yweFWCOU5v5BGtQ==; Received: from localhost ([::1] helo=bombadil.infradead.org) by bombadil.infradead.org with esmtp (Exim 4.94.2 #2 (Red Hat Linux)) id 1oRKeb-003XVJ-Is; Thu, 25 Aug 2022 21:44:46 +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 1oRKeW-003XRG-De; Thu, 25 Aug 2022 21:44:41 +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 161817F2E; Thu, 25 Aug 2022 23:44:36 +0200 (CEST) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=walle.cc; s=mail2022082101; t=1661463876; 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=5zX8TjV8dOnJxKMl5NAJkTUty3DOJ6KEgZ/kYBbKIV8=; b=XB4NXM872kGcTLCruhp6Nxw8vdVKpW5vwcqPrnH+OYu9aer1qGfz9rzEpjs1Crf2KUV/Qm FOCV8bfXuLjziajVsbUgw0I2d1nBm5dDWGTNmrUf9jOlHfwjUrXUETkUiZ6ZsPutscxK/P oYXnPf3S3zwyW2XCRVXGEvWwa+L3lY1R6Z7AOUe/YeICN0Z/5KfCORfonTzK878knZ1cYb TbPl0A0Ax0+uiMmaCn/mTIPCTV7Y12/JB0NntKeuzVXIkwMWalRaTwarHT2fYO3XIujh9M iujJat5JCbPNiNnCUXu65BFQztrE8u7JoaHIrOKLPIImJjtkQ9ng5wEGF6uyyQ== From: Michael Walle To: Miquel Raynal , Richard Weinberger , Vignesh Raghavendra , Rob Herring , Krzysztof Kozlowski , Srinivas Kandagatla , Shawn Guo , Li Yang , =?utf-8?b?UmFmYcWCIE1pxYJlY2tp?= , "David S . Miller" , Eric Dumazet , Jakub Kicinski , Paolo Abeni , Frank Rowand Cc: linux-mtd@lists.infradead.org, devicetree@vger.kernel.org, linux-kernel@vger.kernel.org, linux-arm-kernel@lists.infradead.org, netdev@vger.kernel.org, Ahmad Fatoum , Michael Walle Subject: [PATCH v1 01/14] net: add helper eth_addr_add() Date: Thu, 25 Aug 2022 23:44:10 +0200 Message-Id: <20220825214423.903672-2-michael@walle.cc> X-Mailer: git-send-email 2.30.2 In-Reply-To: <20220825214423.903672-1-michael@walle.cc> References: <20220825214423.903672-1-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-20220825_144440_653041_CF1E0ADC X-CRM114-Status: UNSURE ( 9.54 ) X-CRM114-Notice: Please train this message. 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 --- include/linux/etherdevice.h | 14 ++++++++++++++ 1 file changed, 14 insertions(+) diff --git a/include/linux/etherdevice.h b/include/linux/etherdevice.h index 92b10e67d5f8..d1be5ca4d5cb 100644 --- a/include/linux/etherdevice.h +++ b/include/linux/etherdevice.h @@ -485,6 +485,20 @@ 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