From nobody Mon Sep 29 20:16:02 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 3FDF9C25B0D for ; Tue, 16 Aug 2022 04:38:59 +0000 (UTC) Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S231591AbiHPEi6 (ORCPT ); Tue, 16 Aug 2022 00:38:58 -0400 Received: from lindbergh.monkeyblade.net ([23.128.96.19]:42020 "EHLO lindbergh.monkeyblade.net" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S231192AbiHPEiU (ORCPT ); Tue, 16 Aug 2022 00:38:20 -0400 Received: from dfw.source.kernel.org (dfw.source.kernel.org [IPv6:2604:1380:4641:c500::1]) by lindbergh.monkeyblade.net (Postfix) with ESMTPS id 02BC9CACA1; Mon, 15 Aug 2022 13:27:58 -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 7E9AC611AA; Mon, 15 Aug 2022 20:27:57 +0000 (UTC) Received: by smtp.kernel.org (Postfix) with ESMTPSA id 67C67C433C1; Mon, 15 Aug 2022 20:27:56 +0000 (UTC) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/simple; d=linuxfoundation.org; s=korg; t=1660595276; bh=XVTACl5lEivz5w/igqkLXPqt+lJ92BfMNTk1diWpk6Q=; h=From:To:Cc:Subject:Date:In-Reply-To:References:From; b=TukIbbGZmieuGfP3NMFljxyH5mM4N3pLGOq8rzlPUEoUfk0gqq8NIaDZGA8jEAtLQ 9vGF0vyAxTiT9GjGO/6tgPneAjyGbXYy/vn3k3hVnV4iSHxNuhz1jq265fybJImo1c dtLKnJsstn5OOt+IlUBx+Yu2YhsPM9p/zw2c+3OU= 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 0713/1157] iio: potentiometer: mcp4131: Fix alignment for DMA safety Date: Mon, 15 Aug 2022 20:01:09 +0200 Message-Id: <20220815180508.050661480@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 4842e5de6f39ebf2c0f6da9e6a0cb751c7108507 ] ____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: 22d199a53910 ("iio: potentiometer: add driver for Microchip MCP413X/= 414X/415X/416X/423X/424X/425X/426X") Signed-off-by: Jonathan Cameron Acked-by: Nuno S=C3=A1 Link: https://lore.kernel.org/r/20220508175712.647246-85-jic23@kernel.org Signed-off-by: Sasha Levin --- drivers/iio/potentiometer/mcp4131.c | 2 +- 1 file changed, 1 insertion(+), 1 deletion(-) diff --git a/drivers/iio/potentiometer/mcp4131.c b/drivers/iio/potentiomete= r/mcp4131.c index 7c8c18ab8764..7890c0993ec4 100644 --- a/drivers/iio/potentiometer/mcp4131.c +++ b/drivers/iio/potentiometer/mcp4131.c @@ -129,7 +129,7 @@ struct mcp4131_data { struct spi_device *spi; const struct mcp4131_cfg *cfg; struct mutex lock; - u8 buf[2] ____cacheline_aligned; + u8 buf[2] __aligned(IIO_DMA_MINALIGN); }; =20 #define MCP4131_CHANNEL(ch) { \ --=20 2.35.1