From patchwork Sun May 8 17:57:10 2022 Content-Type: text/plain; charset="utf-8" MIME-Version: 1.0 Content-Transfer-Encoding: 8bit X-Patchwork-Submitter: Jonathan Cameron X-Patchwork-Id: 12842591 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 B9CE8C433FE for ; Sun, 8 May 2022 19:13:26 +0000 (UTC) Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S231171AbiEHTRN (ORCPT ); Sun, 8 May 2022 15:17:13 -0400 Received: from lindbergh.monkeyblade.net ([23.128.96.19]:41354 "EHLO lindbergh.monkeyblade.net" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S240172AbiEHSEU (ORCPT ); Sun, 8 May 2022 14:04:20 -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 040F6558C for ; Sun, 8 May 2022 11:00:29 -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 B9B37B80E5B for ; Sun, 8 May 2022 18:00:27 +0000 (UTC) Received: by smtp.kernel.org (Postfix) with ESMTPSA id 6A916C385B0; Sun, 8 May 2022 18:00:19 +0000 (UTC) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/simple; d=kernel.org; s=k20201202; t=1652032826; bh=LN8zEZvhTlvWiHKaWmD9tw8c9oiVxwzQXUiHqdA4mr4=; h=From:To:Cc:Subject:Date:In-Reply-To:References:From; b=GQYaBstBRTZaD0eVFiJNWqXZ1kW9ThbgYRmN5Jp/y+fZGLtbVTCD3mg1PpqhPnvTL S/NuxNs5Fpt8cr5DNqYxRoIA7+0qeJXTKcjrco0+ZzELURcnLa0W6WXKCmzobb6ft3 6SFGSXKIwIRyLyRX8TSzLB1Qmiz9QVex0NuWYL8xtfmfNyPJQ1krN1P3d/efZGu8xM 65xPArK9ugkEdevHu6PRVZks2Q6+inqhnO6EiPIUkniliBNo7m4yVZ0kMFroOZsKLy sC8zKjUsY7FmVU5WCWHXUelgvirMFSDelyhbz3fw7hGavg5yFif7/L5j1+yi7Q6a35 09Vem45fKTzOQ== 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 90/92] iio: temp: ltc2983: Fix alignment for DMA safety Date: Sun, 8 May 2022 18:57:10 +0100 Message-Id: <20220508175712.647246-91-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: f110f3188e56 ("iio: temperature: Add support for LTC2983") Signed-off-by: Jonathan Cameron Acked-by: Nuno Sá --- drivers/iio/temperature/ltc2983.c | 4 ++-- 1 file changed, 2 insertions(+), 2 deletions(-) diff --git a/drivers/iio/temperature/ltc2983.c b/drivers/iio/temperature/ltc2983.c index 301c3f13fb26..1b8252d86889 100644 --- a/drivers/iio/temperature/ltc2983.c +++ b/drivers/iio/temperature/ltc2983.c @@ -200,11 +200,11 @@ struct ltc2983_data { u8 num_channels; u8 iio_channels; /* - * DMA (thus cache coherency maintenance) requires the + * DMA (thus cache coherency maintenance) may require the * transfer buffers to live in their own cache lines. * Holds the converted temperature */ - __be32 temp ____cacheline_aligned; + __be32 temp __aligned(IIO_DMA_MINALIGN); }; struct ltc2983_sensor {