From patchwork Sun May 8 17:57:01 2022 Content-Type: text/plain; charset="utf-8" MIME-Version: 1.0 Content-Transfer-Encoding: 8bit X-Patchwork-Submitter: Jonathan Cameron X-Patchwork-Id: 12842576 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 7BF09C433EF for ; Sun, 8 May 2022 19:12:47 +0000 (UTC) Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S229762AbiEHTQf (ORCPT ); Sun, 8 May 2022 15:16:35 -0400 Received: from lindbergh.monkeyblade.net ([23.128.96.19]:40980 "EHLO lindbergh.monkeyblade.net" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S241273AbiEHSDL (ORCPT ); Sun, 8 May 2022 14:03:11 -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 4C470558C for ; Sun, 8 May 2022 10:59:21 -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 0DE43B80E75 for ; Sun, 8 May 2022 17:59:20 +0000 (UTC) Received: by smtp.kernel.org (Postfix) with ESMTPSA id 21359C385B0; Sun, 8 May 2022 17:59:10 +0000 (UTC) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/simple; d=kernel.org; s=k20201202; t=1652032758; bh=x/WE7UAUU2zfnPjJH5irvBf3GICl0zcPzuuUTNNUyZQ=; h=From:To:Cc:Subject:Date:In-Reply-To:References:From; b=qyeAeNeq4hnhB226t9DvGKlypq+GSOTcIgImxHQruRV6eLnp4dml1Y16xsU4Y5N9x 5ldiGzdJ5BweJq60I3grip7YpTtctx6/R7HRTSJgwJ1569hXo7uEcE5KnicZQL3uw6 lmv+dbRHcCFMxF7+cLr1v9cxcmNEQA31DFuGo4bKfmWX+pzpgyzGRwyc/i0X0na4/6 s+3au7rbqmXVf+4w/VA20ZNdqrD34rx/4JAmyXAgMpxlXZk6FqdKJ0myp0juv/9A2n ywYnQ/ezs+x3DDZ2bE7FLGw/jbT4Av3w003n+4+oJe7g0k8T3xr3hosHuQTOUmbYKb 6+LCGpQHea6Rg== From: Jonathan Cameron To: linux-iio@vger.kernel.org Cc: Alexandru Lazar , Akinobu Mita , Alexandru Tachici , Antoniu Miclaus , Charles-Antoine Couret , Cosmin Tanislav , David Lechner , Ivan Mikhaylov , Jacopo Mondi , Jean-Baptiste Maneyrol , Lars-Peter Clausen , Marcelo Schmitt , =?utf-8?q?M=C3=A5rten_Lindahl?= , Matt Ranostay , Matt Ranostay , Michael Hennerich , Michael Welling , Mugilraj Dhavachelvan , Navin Sankar Velliangiri , =?utf-8?q?Nuno_S=C3=A1?= , Paul Cercueil , Phil Reid , Puranjay Mohan , Ricardo Ribalda , Robert Jones , Rui Miguel Silva , Sean Nyekjaer , Tomas Melin , Tomislav Denis , =?utf-8?q?Uwe_Kleine-K=C3=B6nig?= , Jonathan Cameron Subject: [PATCH v2 81/92] iio: potentiometer: ad5272: Fix alignment for DMA safety Date: Sun, 8 May 2022 18:57:01 +0100 Message-Id: <20220508175712.647246-82-jic23@kernel.org> X-Mailer: git-send-email 2.36.0 In-Reply-To: <20220508175712.647246-1-jic23@kernel.org> References: <20220508175712.647246-1-jic23@kernel.org> MIME-Version: 1.0 Precedence: bulk List-ID: X-Mailing-List: linux-iio@vger.kernel.org From: Jonathan Cameron ____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: 79e8a32d2aa9 ("iio: ad5272: Add support for Analog Devices digital potentiometers") Signed-off-by: Jonathan Cameron Reviewed-by: Phil Reid Acked-by: Nuno Sá --- drivers/iio/potentiometer/ad5272.c | 2 +- 1 file changed, 1 insertion(+), 1 deletion(-) diff --git a/drivers/iio/potentiometer/ad5272.c b/drivers/iio/potentiometer/ad5272.c index d8cbd170262f..ed5fc0b50fe9 100644 --- a/drivers/iio/potentiometer/ad5272.c +++ b/drivers/iio/potentiometer/ad5272.c @@ -50,7 +50,7 @@ struct ad5272_data { struct i2c_client *client; struct mutex lock; const struct ad5272_cfg *cfg; - u8 buf[2] ____cacheline_aligned; + u8 buf[2] __aligned(IIO_DMA_MINALIGN); }; static const struct iio_chan_spec ad5272_channel = {