From nobody Mon Sep 29 20:18:44 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 60A22C3F6B0 for ; Tue, 16 Aug 2022 04:36:22 +0000 (UTC) Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S231165AbiHPEgU (ORCPT ); Tue, 16 Aug 2022 00:36:20 -0400 Received: from lindbergh.monkeyblade.net ([23.128.96.19]:57496 "EHLO lindbergh.monkeyblade.net" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S231130AbiHPEfX (ORCPT ); Tue, 16 Aug 2022 00:35:23 -0400 Received: from ams.source.kernel.org (ams.source.kernel.org [IPv6:2604:1380:4601:e00::1]) by lindbergh.monkeyblade.net (Postfix) with ESMTPS id 213B5CAC84; Mon, 15 Aug 2022 13:27:47 -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 600BFB8119B; Mon, 15 Aug 2022 20:27:45 +0000 (UTC) Received: by smtp.kernel.org (Postfix) with ESMTPSA id 982AFC433D6; Mon, 15 Aug 2022 20:27:43 +0000 (UTC) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/simple; d=linuxfoundation.org; s=korg; t=1660595264; bh=5CiSJRDycVN1/+uf8e3hF3S3PgT4ShsvHAWoBCYNW5k=; h=From:To:Cc:Subject:Date:In-Reply-To:References:From; b=eMvxGByHs7g89EihLZgYfgFmxGpYM+BcrLxvwYNrkCJ7LLw15rxAMCwFb3DkRwmLj 8sSyUgpPCjqCSBYhg0x7x1lmMsN/VxAHpsiqRJAA6YmnakGKQMjCIXnzKlIbPCBneX nNANRyC0LrKjJHcVo2YYzU3WPZ93Bbvh6/hsAU1g= From: Greg Kroah-Hartman To: linux-kernel@vger.kernel.org Cc: Greg Kroah-Hartman , stable@vger.kernel.org, Jonathan Cameron , Mugilraj Dhavachelvan , =?UTF-8?q?Nuno=20S=C3=A1?= , Sasha Levin Subject: [PATCH 5.19 0709/1157] iio: potentiometer: ad5110: Fix alignment for DMA safety Date: Mon, 15 Aug 2022 20:01:05 +0200 Message-Id: <20220815180507.920005842@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 b5841c38cb2f7e54b0787b3e0326a6b21b89ea3e ] ____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: d03a74bfacce ("iio: potentiometer: Add driver support for AD5110") Signed-off-by: Jonathan Cameron Cc: Mugilraj Dhavachelvan Acked-by: Nuno S=C3=A1 Link: https://lore.kernel.org/r/20220508175712.647246-81-jic23@kernel.org Signed-off-by: Sasha Levin --- drivers/iio/potentiometer/ad5110.c | 4 ++-- 1 file changed, 2 insertions(+), 2 deletions(-) diff --git a/drivers/iio/potentiometer/ad5110.c b/drivers/iio/potentiometer= /ad5110.c index d4eeedae56e5..8fbcce482989 100644 --- a/drivers/iio/potentiometer/ad5110.c +++ b/drivers/iio/potentiometer/ad5110.c @@ -63,10 +63,10 @@ struct ad5110_data { struct mutex lock; const struct ad5110_cfg *cfg; /* - * DMA (thus cache coherency maintenance) requires the + * DMA (thus cache coherency maintenance) may require the * transfer buffers to live in their own cache lines. */ - u8 buf[2] ____cacheline_aligned; + u8 buf[2] __aligned(IIO_DMA_MINALIGN); }; =20 static const struct iio_chan_spec ad5110_channels[] =3D { --=20 2.35.1