From patchwork Tue May 3 08:59:26 2022 Content-Type: text/plain; charset="utf-8" MIME-Version: 1.0 Content-Transfer-Encoding: 7bit X-Patchwork-Submitter: Jonathan Cameron X-Patchwork-Id: 12835382 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 1B2FFC433EF for ; Tue, 3 May 2022 09:04:51 +0000 (UTC) Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S233222AbiECJIU (ORCPT ); Tue, 3 May 2022 05:08:20 -0400 Received: from lindbergh.monkeyblade.net ([23.128.96.19]:45224 "EHLO lindbergh.monkeyblade.net" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S233215AbiECJIS (ORCPT ); Tue, 3 May 2022 05:08:18 -0400 Received: from dfw.source.kernel.org (dfw.source.kernel.org [139.178.84.217]) by lindbergh.monkeyblade.net (Postfix) with ESMTPS id C01881BE93 for ; Tue, 3 May 2022 02:04:44 -0700 (PDT) Received: from smtp.kernel.org (relay.kernel.org [52.25.139.140]) (using TLSv1.2 with cipher ECDHE-RSA-AES256-GCM-SHA384 (256/256 bits)) (No client certificate requested) by dfw.source.kernel.org (Postfix) with ESMTPS id 5B59860DDD for ; Tue, 3 May 2022 09:04:44 +0000 (UTC) Received: by smtp.kernel.org (Postfix) with ESMTPSA id 3CDB8C385B2; Tue, 3 May 2022 09:04:35 +0000 (UTC) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/simple; d=kernel.org; s=k20201202; t=1651568683; bh=LzaPr3OLtbcZBVeLVUs27XEqagu01nF8Iae/GZ+30NM=; h=From:To:Cc:Subject:Date:In-Reply-To:References:From; b=mI1kDWFVQTOCIFU6kWhl5Maud+JuVYi9l5bgfQq/xzM/tIDv9Hq1no0u7Ff7qi1TR 6iKNdE8jIc/Y969kKQCwkrrNP7jEF42WkJKCcudCCN4sRljd/AQ3BLYzJeCzQwYPuU nLKEsJL+UHNtLhA8Qv37Al1Thw1lc9aXFl1xNMQFFZSCikxgVy5WdPEuUyO55kEg6U vknnkipItGceOj3D2KoZyWchK8HCJx8SdGP/1/8tzlaIvC3BEC2ZvivGt2BnqyvP0t hx2HfILMzSMREt1Ev7el5GOvd2pTufCqO85UJQP97xmEdMcLMuBqjXKdhU7X/FI8kT KcJP2A9dNRRsQ== From: Jonathan Cameron To: linux-iio@vger.kernel.org Cc: Akinobu Mita , Alexandru Lazar , Alexandru Tachici , Antoniu Miclaus , Charles-Antoine Couret , Cosmin Tanislav , Cristian Pop , David Lechner , Ivan Mikhaylov , Jacopo Mondi , Jean-Baptiste Maneyrol , Lars-Peter Clausen , Marcelo Schmitt , =?utf-8?q?M=C3=A5rten_Lindahl?= , Matt Ranostay , Michael Hennerich , Michael Welling , Mugilraj Dhavachelvan , Navin Sankar Velliangiri , =?utf-8?q?Nuno_S=C3=A1?= , Paul Cercueil , Phil Reid , Puranjay Mohan , Ricardo Ribalda , Robert Jones , Rui Miguel Silva , Sean Nyekjaer , Tomas Melin , Tomislav Denis , =?utf-8?q?Uwe_Kleine-K=C3=B6nig?= , Jonathan Cameron Subject: [PATCH 83/92] iio: potentiometer: mcp41010: Fix alignment for DMA safety Date: Tue, 3 May 2022 09:59:26 +0100 Message-Id: <20220503085935.1533814-84-jic23@kernel.org> X-Mailer: git-send-email 2.36.0 In-Reply-To: <20220503085935.1533814-1-jic23@kernel.org> References: <20220503085935.1533814-1-jic23@kernel.org> MIME-Version: 1.0 Precedence: bulk List-ID: X-Mailing-List: linux-iio@vger.kernel.org From: Jonathan Cameron ____cacheline_aligned is an insufficient guarantee for non-coherent DMA on platforms with 128 byte cachelines above L1. Switch to the updated IIO_ALIGN definition. Fixes: 092cb71a604e ("iio: potentiometer: Add driver for Microchip MCP41xxx/42xxx") Signed-off-by: Jonathan Cameron --- drivers/iio/potentiometer/mcp41010.c | 2 +- 1 file changed, 1 insertion(+), 1 deletion(-) diff --git a/drivers/iio/potentiometer/mcp41010.c b/drivers/iio/potentiometer/mcp41010.c index 30a4594d4e11..2726a3b4a782 100644 --- a/drivers/iio/potentiometer/mcp41010.c +++ b/drivers/iio/potentiometer/mcp41010.c @@ -60,7 +60,7 @@ struct mcp41010_data { const struct mcp41010_cfg *cfg; struct mutex lock; /* Protect write sequences */ unsigned int value[MCP41010_MAX_WIPERS]; /* Cache wiper values */ - u8 buf[2] ____cacheline_aligned; + u8 buf[2] __aligned(IIO_ALIGN); }; #define MCP41010_CHANNEL(ch) { \