From nobody Fri Oct 24 20:29:25 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 C2BA2C00140 for ; Mon, 15 Aug 2022 21:43:30 +0000 (UTC) Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S1349386AbiHOVn2 (ORCPT ); Mon, 15 Aug 2022 17:43:28 -0400 Received: from lindbergh.monkeyblade.net ([23.128.96.19]:47514 "EHLO lindbergh.monkeyblade.net" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S1349165AbiHOVjd (ORCPT ); Mon, 15 Aug 2022 17:39:33 -0400 Received: from sin.source.kernel.org (sin.source.kernel.org [IPv6:2604:1380:40e1:4800::1]) by lindbergh.monkeyblade.net (Postfix) with ESMTPS id BFBA03ED4F; Mon, 15 Aug 2022 12:28:30 -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 sin.source.kernel.org (Postfix) with ESMTPS id D507DCE12C9; Mon, 15 Aug 2022 19:28:28 +0000 (UTC) Received: by smtp.kernel.org (Postfix) with ESMTPSA id B451CC433C1; Mon, 15 Aug 2022 19:28:26 +0000 (UTC) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/simple; d=linuxfoundation.org; s=korg; t=1660591707; bh=Qb7NOxQ2HvEjpwNTGYPuGuO+GJE36F0ManhVFQhhL4o=; h=From:To:Cc:Subject:Date:In-Reply-To:References:From; b=M0rsA0hUHqp8ERZB+ix7bnS7Oi3LCEJOeqpP7AJuveNadjuwm0tF4L2/nl73rCKcJ j+h+7HN1/JqXsv6nqfruWvuAq2eSQdfIHd5qmDfpveTOqgMouIGXfDA4fBfxtQOPQA 0v208Btvnc6gyYjA5UFi87YKHnkv+4YND/vzwZsM= 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 5.18 0667/1095] iio: potentiometer: mcp41010: Fix alignment for DMA safety Date: Mon, 15 Aug 2022 20:01:06 +0200 Message-Id: <20220815180456.985640411@linuxfoundation.org> X-Mailer: git-send-email 2.37.2 In-Reply-To: <20220815180429.240518113@linuxfoundation.org> References: <20220815180429.240518113@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