From mboxrd@z Thu Jan 1 00:00:00 1970 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 4C192C25B0E for ; Mon, 15 Aug 2022 21:47:47 +0000 (UTC) Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S1350333AbiHOVrp (ORCPT ); Mon, 15 Aug 2022 17:47:45 -0400 Received: from lindbergh.monkeyblade.net ([23.128.96.19]:53436 "EHLO lindbergh.monkeyblade.net" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S1349789AbiHOVmF (ORCPT ); Mon, 15 Aug 2022 17:42:05 -0400 Received: from ams.source.kernel.org (ams.source.kernel.org [145.40.68.75]) by lindbergh.monkeyblade.net (Postfix) with ESMTPS id 6821B6DAFA; Mon, 15 Aug 2022 12:29:34 -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 D191FB8107A; Mon, 15 Aug 2022 19:29:32 +0000 (UTC) Received: by smtp.kernel.org (Postfix) with ESMTPSA id 32829C433D7; Mon, 15 Aug 2022 19:29:31 +0000 (UTC) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/simple; d=linuxfoundation.org; s=korg; t=1660591771; bh=EzOr3ecHRSRRF9rDsjBNuE8SLcI+04DTjOy9tRGAHBc=; h=From:To:Cc:Subject:Date:In-Reply-To:References:From; b=Ex9fHHHJE1SmsPhDjENlC/nLaEpebcONzQbLm1mU9TlK79txKJqsZxjnBlAzu7oOX 4o2ohWded0FNqLZlM82XsLpbAKODtEMDIyDksyPIttc7/YRmmVpMCxBX4GKutbre1g 9GqCnIGMPuxeS6tg046sNfA21n38m4KttR6wKN9s= From: Greg Kroah-Hartman To: linux-kernel@vger.kernel.org Cc: Greg Kroah-Hartman , stable@vger.kernel.org, Jonathan Cameron , Rui Miguel Silva , =?UTF-8?q?Nuno=20S=C3=A1?= , Sasha Levin Subject: [PATCH 5.18 0659/1095] iio: gyro: fxas210002c: Fix alignment for DMA safety Date: Mon, 15 Aug 2022 20:00:58 +0200 Message-Id: <20220815180456.669805424@linuxfoundation.org> X-Mailer: git-send-email 2.37.2 In-Reply-To: <20220815180429.240518113@linuxfoundation.org> References: <20220815180429.240518113@linuxfoundation.org> User-Agent: quilt/0.67 MIME-Version: 1.0 Content-Type: text/plain; charset=UTF-8 Content-Transfer-Encoding: 8bit Precedence: bulk List-ID: X-Mailing-List: linux-kernel@vger.kernel.org From: Jonathan Cameron [ Upstream commit 3aafe923987cb4a15e16f03c6185ed4b6a78ca00 ] ____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. Updated the comment to 'may' require. Fixes: a0701b6263ae ("iio: gyro: add core driver for fxas21002c") Signed-off-by: Jonathan Cameron Reviewed-by: Rui Miguel Silva Acked-by: Nuno Sá Link: https://lore.kernel.org/r/20220508175712.647246-76-jic23@kernel.org Signed-off-by: Sasha Levin --- drivers/iio/gyro/fxas21002c_core.c | 6 +++--- 1 file changed, 3 insertions(+), 3 deletions(-) diff --git a/drivers/iio/gyro/fxas21002c_core.c b/drivers/iio/gyro/fxas21002c_core.c index 410e5e9f2672..7a459a823f6e 100644 --- a/drivers/iio/gyro/fxas21002c_core.c +++ b/drivers/iio/gyro/fxas21002c_core.c @@ -150,10 +150,10 @@ struct fxas21002c_data { struct regulator *vddio; /* - * 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. */ - s16 buffer[8] ____cacheline_aligned; + s16 buffer[8] __aligned(IIO_DMA_MINALIGN); }; enum fxas21002c_channel_index { -- 2.35.1