From nobody Mon Sep 29 20:16:04 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 91C0AC25B0F for ; Tue, 16 Aug 2022 04:35:30 +0000 (UTC) Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S230262AbiHPEf3 (ORCPT ); Tue, 16 Aug 2022 00:35:29 -0400 Received: from lindbergh.monkeyblade.net ([23.128.96.19]:52200 "EHLO lindbergh.monkeyblade.net" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S230388AbiHPEej (ORCPT ); Tue, 16 Aug 2022 00:34:39 -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 5B486163068; Mon, 15 Aug 2022 13:25:53 -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 EF5BD61072; Mon, 15 Aug 2022 20:25:52 +0000 (UTC) Received: by smtp.kernel.org (Postfix) with ESMTPSA id F07CAC433C1; Mon, 15 Aug 2022 20:25:51 +0000 (UTC) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/simple; d=linuxfoundation.org; s=korg; t=1660595152; bh=ewhIZVcN8mqqJ7vGcGMhBBjh2v+w6tkj80szH9dp8Ak=; h=From:To:Cc:Subject:Date:In-Reply-To:References:From; b=wmmInbt8NjPrERSN0ILcatDJbW78N3WIRrN3x2YzTYtxiKNH/VOQKGhUftSG/eJOf 2oolBaIFxBRmgJxZNoFo9UdSGbuZZgAEJmEEePtPw9XLluo5Q50Ah8DBGJG50ldI5Y qwnBz8sKAxogXC/SFL4A3f7M85YfcRhyp4pdmP+Y= From: Greg Kroah-Hartman To: linux-kernel@vger.kernel.org Cc: Greg Kroah-Hartman , stable@vger.kernel.org, Jonathan Cameron , Lars-Peter Clausen , =?UTF-8?q?Nuno=20S=C3=A1?= , Sasha Levin Subject: [PATCH 5.19 0673/1157] iio: dac: ad5360: Fix alignment for DMA safety Date: Mon, 15 Aug 2022 20:00:29 +0200 Message-Id: <20220815180506.598994229@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 94ec314e1bd686b669c24385ce2dbc967eb74147 ] ____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. Update the comment to include 'may'. Fixes: a3e2940c24d3 ("staging:iio:dac: Add AD5360 driver") Signed-off-by: Jonathan Cameron Cc: Lars-Peter Clausen Acked-by: Nuno S=C3=A1 Link: https://lore.kernel.org/r/20220508175712.647246-45-jic23@kernel.org Signed-off-by: Sasha Levin --- drivers/iio/dac/ad5360.c | 4 ++-- 1 file changed, 2 insertions(+), 2 deletions(-) diff --git a/drivers/iio/dac/ad5360.c b/drivers/iio/dac/ad5360.c index 22b000a40828..e0b7f658d611 100644 --- a/drivers/iio/dac/ad5360.c +++ b/drivers/iio/dac/ad5360.c @@ -79,13 +79,13 @@ struct ad5360_state { struct mutex lock; =20 /* - * DMA (thus cache coherency maintenance) requires the + * DMA (thus cache coherency maintenance) may require the * transfer buffers to live in their own cache lines. */ union { __be32 d32; u8 d8[4]; - } data[2] ____cacheline_aligned; + } data[2] __aligned(IIO_DMA_MINALIGN); }; =20 enum ad5360_type { --=20 2.35.1