From nobody Mon Sep 29 22:49:03 2025 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 91DE8C25B0D for ; Tue, 16 Aug 2022 04:37:29 +0000 (UTC) Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S231342AbiHPEh2 (ORCPT ); Tue, 16 Aug 2022 00:37:28 -0400 Received: from lindbergh.monkeyblade.net ([23.128.96.19]:57430 "EHLO lindbergh.monkeyblade.net" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S229946AbiHPEgq (ORCPT ); Tue, 16 Aug 2022 00:36:46 -0400 Received: from dfw.source.kernel.org (dfw.source.kernel.org [139.178.84.217]) by lindbergh.monkeyblade.net (Postfix) with ESMTPS id 6D2A69F756; Mon, 15 Aug 2022 13:27:26 -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 BC3986114F; Mon, 15 Aug 2022 20:27:25 +0000 (UTC) Received: by smtp.kernel.org (Postfix) with ESMTPSA id A6932C433D6; Mon, 15 Aug 2022 20:27:24 +0000 (UTC) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/simple; d=linuxfoundation.org; s=korg; t=1660595245; bh=/SyJqYk5Ult4XMRcEIsFkiycr9mFPUXToRHbXMAIpdQ=; h=From:To:Cc:Subject:Date:In-Reply-To:References:From; b=RdAvphwyeAXUp+qkIrfS4YfXT249gCIAOg3K6FpapDecAyVliooQtjQFGk76xeRv0 F/pmUL8BhWNv8T/jEH7lLxzlPN5Ba6pkq8Z0jJokrwKxWTuixXpHxreyXIn+1eoHLw qQITEZHHfUBYzsY3rYYzSU5Opgtg7dfc9wgtZ6U8= 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 5.19 0704/1157] iio: gyro: fxas210002c: Fix alignment for DMA safety Date: Mon, 15 Aug 2022 20:01:00 +0200 Message-Id: <20220815180507.743135212@linuxfoundation.org> X-Mailer: git-send-email 2.37.2 In-Reply-To: <20220815180439.416659447@linuxfoundation.org> References: <20220815180439.416659447@linuxfoundation.org> User-Agent: quilt/0.67 MIME-Version: 1.0 Content-Type: text/plain; charset="utf-8" Content-Transfer-Encoding: quoted-printable 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 S=C3=A1 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/fxas2100= 2c_core.c index 0923fd793492..a36d71d9e3ea 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; =20 /* - * 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); }; =20 enum fxas21002c_channel_index { --=20 2.35.1