From patchwork Sun May 8 17:57:09 2022 Content-Type: text/plain; charset="utf-8" MIME-Version: 1.0 Content-Transfer-Encoding: 8bit X-Patchwork-Submitter: Jonathan Cameron X-Patchwork-Id: 12842579 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 6D7A6C433EF for ; Sun, 8 May 2022 19:12:53 +0000 (UTC) Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S229759AbiEHTQj (ORCPT ); Sun, 8 May 2022 15:16:39 -0400 Received: from lindbergh.monkeyblade.net ([23.128.96.19]:41266 "EHLO lindbergh.monkeyblade.net" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S1344379AbiEHSEK (ORCPT ); Sun, 8 May 2022 14:04:10 -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 F0A3E558C for ; Sun, 8 May 2022 11:00:19 -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 8B54B61262 for ; Sun, 8 May 2022 18:00:19 +0000 (UTC) Received: by smtp.kernel.org (Postfix) with ESMTPSA id 57AA8C385A4; Sun, 8 May 2022 18:00:12 +0000 (UTC) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/simple; d=kernel.org; s=k20201202; t=1652032819; bh=3AXDyWRPE1qksmDlPW4/LWb3unKf8qa9y+leRrT6I88=; h=From:To:Cc:Subject:Date:In-Reply-To:References:From; b=osYteEqsV1hr7PlXFDfCIfc3Sqvm/b80OSbf8rgMcMmdFrKPiw/w1VD5XoiVnj35i MUujKsq2wA9WmsxaSGAvhZ6uXPlf0kn85ft+c1Mvu2Ui6uj2wA6Gy3lV6oNvmar3Ro Af58mCKON8W0x1mspyHfneoCPJudqxfDemc2SaOiilvsHOsBeg0IA8QgwlTmAOFqvo 9L65l1n08ufMQcEIlNAEA0S43vnoRvnHVG1cxObWb1vHNMp1TH7cb9XwSxHG4rQ1bD Y+DDSMMnOJXNaaFkSc8yfGfNHMKh7NIJupdrBBkOJJl32RJcfNLtjDKyCi8Jnh3URH UAUPT81g2Bd4w== 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 89/92] iio: resolver: ad2s90: Fix alignment for DMA safety Date: Sun, 8 May 2022 18:57:09 +0100 Message-Id: <20220508175712.647246-90-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 tag is probably not where the issue was first introduced, but is likely to be far beyond the point where anyone considers backporting this fix. Fixes: 58f08b0af857 ("staging:iio:resolver:ad2s90 general cleanup") Signed-off-by: Jonathan Cameron Acked-by: Nuno Sá --- drivers/iio/resolver/ad2s90.c | 2 +- 1 file changed, 1 insertion(+), 1 deletion(-) diff --git a/drivers/iio/resolver/ad2s90.c b/drivers/iio/resolver/ad2s90.c index d6a91f137e13..be6836e55376 100644 --- a/drivers/iio/resolver/ad2s90.c +++ b/drivers/iio/resolver/ad2s90.c @@ -24,7 +24,7 @@ struct ad2s90_state { struct mutex lock; /* lock to protect rx buffer */ struct spi_device *sdev; - u8 rx[2] ____cacheline_aligned; + u8 rx[2] __aligned(IIO_DMA_MINALIGN); }; static int ad2s90_read_raw(struct iio_dev *indio_dev,