From nobody Mon Sep 29 20:18:38 2025 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 01E65C282E7 for ; Tue, 16 Aug 2022 04:35:09 +0000 (UTC) Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S230436AbiHPEfI (ORCPT ); Tue, 16 Aug 2022 00:35:08 -0400 Received: from lindbergh.monkeyblade.net ([23.128.96.19]:57594 "EHLO lindbergh.monkeyblade.net" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S229588AbiHPEeY (ORCPT ); Tue, 16 Aug 2022 00:34:24 -0400 Received: from ams.source.kernel.org (ams.source.kernel.org [145.40.68.75]) by lindbergh.monkeyblade.net (Postfix) with ESMTPS id 68CC7CAC9C; Mon, 15 Aug 2022 13:27:56 -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 ams.source.kernel.org (Postfix) with ESMTPS id 0B134B80EB1; Mon, 15 Aug 2022 20:27:55 +0000 (UTC) Received: by smtp.kernel.org (Postfix) with ESMTPSA id 56744C433C1; Mon, 15 Aug 2022 20:27:53 +0000 (UTC) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/simple; d=linuxfoundation.org; s=korg; t=1660595273; bh=Qb7NOxQ2HvEjpwNTGYPuGuO+GJE36F0ManhVFQhhL4o=; h=From:To:Cc:Subject:Date:In-Reply-To:References:From; b=FERSIb06auR34ggk0dZwr4nfIyy/F7qcqDBvk9TwGMsx5dq515tX3s/4fCDyY2bXM FqMh1KXORyvMtzt0Z4CBC4Q3+Bep4orVos1cl58bba9nK/Ht/X4DhZ4LN/2eBGZ6Zv 2F7l9CTyY9OTXa5HJm+KJPMYNqWwfPZeQYdDS2DY= From: Greg Kroah-Hartman To: linux-kernel@vger.kernel.org Cc: Greg Kroah-Hartman , stable@vger.kernel.org, Jonathan Cameron , =?UTF-8?q?Nuno=20S=C3=A1?= , Sasha Levin Subject: [PATCH 5.19 0712/1157] iio: potentiometer: mcp41010: Fix alignment for DMA safety Date: Mon, 15 Aug 2022 20:01:08 +0200 Message-Id: <20220815180508.017051417@linuxfoundation.org> X-Mailer: git-send-email 2.37.2 In-Reply-To: <20220815180439.416659447@linuxfoundation.org> References: <20220815180439.416659447@linuxfoundation.org> User-Agent: quilt/0.67 MIME-Version: 1.0 Content-Type: text/plain; charset="utf-8" Content-Transfer-Encoding: quoted-printable Precedence: bulk List-ID: X-Mailing-List: linux-kernel@vger.kernel.org From: Jonathan Cameron [ Upstream commit c5f78f4d2168ba21324095b0d46d4353c2eace4d ] ____cacheline_aligned is an insufficient guarantee for non-coherent DMA on platforms with 128 byte cachelines above L1. Switch to the updated IIO_DMA_MINALIGN definition. Fixes: 092cb71a604e ("iio: potentiometer: Add driver for Microchip MCP41xxx= /42xxx") Signed-off-by: Jonathan Cameron Acked-by: Nuno S=C3=A1 Link: https://lore.kernel.org/r/20220508175712.647246-84-jic23@kernel.org Signed-off-by: Sasha Levin --- drivers/iio/potentiometer/mcp41010.c | 2 +- 1 file changed, 1 insertion(+), 1 deletion(-) diff --git a/drivers/iio/potentiometer/mcp41010.c b/drivers/iio/potentiomet= er/mcp41010.c index 30a4594d4e11..2b73c7540209 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_DMA_MINALIGN); }; =20 #define MCP41010_CHANNEL(ch) { \ --=20 2.35.1