From patchwork Tue May 3 08:59:23 2022 Content-Type: text/plain; charset="utf-8" MIME-Version: 1.0 Content-Transfer-Encoding: 7bit X-Patchwork-Submitter: Jonathan Cameron X-Patchwork-Id: 12835379 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 E3D67C433F5 for ; Tue, 3 May 2022 09:04:21 +0000 (UTC) Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S233155AbiECJHw (ORCPT ); Tue, 3 May 2022 05:07:52 -0400 Received: from lindbergh.monkeyblade.net ([23.128.96.19]:45062 "EHLO lindbergh.monkeyblade.net" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S233215AbiECJHt (ORCPT ); Tue, 3 May 2022 05:07:49 -0400 Received: from ams.source.kernel.org (ams.source.kernel.org [145.40.68.75]) by lindbergh.monkeyblade.net (Postfix) with ESMTPS id 106B81BEA4 for ; Tue, 3 May 2022 02:04:18 -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 B9B78B81BE9 for ; Tue, 3 May 2022 09:04:16 +0000 (UTC) Received: by smtp.kernel.org (Postfix) with ESMTPSA id D6D95C385B2; Tue, 3 May 2022 09:04:06 +0000 (UTC) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/simple; d=kernel.org; s=k20201202; t=1651568655; bh=VAhpmlMeH2aApDfe/0axsTpA1LC4LtU6ooNWbXK4evE=; h=From:To:Cc:Subject:Date:In-Reply-To:References:From; b=LmCOOiEMI04eVouaL/RbcjedPW97kPupxhgoebmivqbgoSkAfbq3jW1GlwZzYUUjd ZJcPW+74zF9sKQ0IA7ubrTsEEQlipS7i+QT9aHgOHYgHUHjgIw35AkLbn6bE1kvtDS BxiOx/kL2mjCauXEb5RDKZiVxePxzYmg6Vk8cndbKGHBVRufmO3diqeJ/talla5yXq STtl0Et68yK0OUKIzoktvWbYfLwGjaFGuLifI0nmB3z65NCmpNPxyzy91saWC/ujoD o2ASJtbMuyo0NUmqzARcQJdLWdMFpP9RGiCZPtvhhcu9eFoQXsOr3+ED7njX91f7ED /2XhhdpABa9cA== From: Jonathan Cameron To: linux-iio@vger.kernel.org Cc: Akinobu Mita , Alexandru Lazar , Alexandru Tachici , Antoniu Miclaus , Charles-Antoine Couret , Cosmin Tanislav , Cristian Pop , David Lechner , Ivan Mikhaylov , Jacopo Mondi , Jean-Baptiste Maneyrol , Lars-Peter Clausen , Marcelo Schmitt , =?utf-8?q?M=C3=A5rten_Lindahl?= , 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 80/92] iio: potentiometer: ad5110: Fix alignment for DMA safety Date: Tue, 3 May 2022 09:59:23 +0100 Message-Id: <20220503085935.1533814-81-jic23@kernel.org> X-Mailer: git-send-email 2.36.0 In-Reply-To: <20220503085935.1533814-1-jic23@kernel.org> References: <20220503085935.1533814-1-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_ALIGN definition. Fixes: d03a74bfacce ("iio: potentiometer: Add driver support for AD5110") Signed-off-by: Jonathan Cameron Cc: Mugilraj Dhavachelvan --- drivers/iio/potentiometer/ad5110.c | 6 +++--- 1 file changed, 3 insertions(+), 3 deletions(-) diff --git a/drivers/iio/potentiometer/ad5110.c b/drivers/iio/potentiometer/ad5110.c index d4eeedae56e5..29f9a9037077 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 - * transfer buffers to live in their own cache lines. + * DMA (thus cache coherency maintenance) may require the + * transfer buffers live in their own cache lines. */ - u8 buf[2] ____cacheline_aligned; + u8 buf[2] __aligned(IIO_ALIGN); }; static const struct iio_chan_spec ad5110_channels[] = {