From patchwork Sun May 8 17:57:04 2022 Content-Type: text/plain; charset="utf-8" MIME-Version: 1.0 Content-Transfer-Encoding: 8bit X-Patchwork-Submitter: Jonathan Cameron X-Patchwork-Id: 12842582 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 3FFCCC433EF for ; Sun, 8 May 2022 19:13:01 +0000 (UTC) Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S230126AbiEHTQp (ORCPT ); Sun, 8 May 2022 15:16:45 -0400 Received: from lindbergh.monkeyblade.net ([23.128.96.19]:41086 "EHLO lindbergh.monkeyblade.net" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S237028AbiEHSDd (ORCPT ); Sun, 8 May 2022 14:03:33 -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 6214B558C for ; Sun, 8 May 2022 10:59:43 -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 0181E6128D for ; Sun, 8 May 2022 17:59:43 +0000 (UTC) Received: by smtp.kernel.org (Postfix) with ESMTPSA id DA358C385B0; Sun, 8 May 2022 17:59:34 +0000 (UTC) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/simple; d=kernel.org; s=k20201202; t=1652032782; bh=EPZdb9P/ZbA988KjM2CXLmRGl1St3OfZ1tl76m7+lpQ=; h=From:To:Cc:Subject:Date:In-Reply-To:References:From; b=X/L3ox/DHOT5uRlU4x6pv80CeZPtKdkTL/W+KrlgkKEknC9e0L8B+xFWSvYMyYvy6 tgVAoUINURiLeHEemLYyLbadd9yNm4W0x1sMD4AlsDuKONykcNiYn5TbGYm+LlOSAJ 2cD03WQfZgXdfX3OC9UHFxV49QBlUa/iOc6xc3Dd7APF9ZKwcyz9hGMjeTZBgFmiPc UC/SnE4OrsIsWbyDlc/90fC5LFjPWMTskA06q++r9O+CziBEgGYvsSe3DXqe8z4bfT K6yzK6e718lTfFnvjmQYXHLrv9kmdF+qY3NXoEFYBKOoyQ/7yEgwzcEpeiAC7iRWEz SfyTkoOwA3ByQ== 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 84/92] iio: potentiometer: mcp4131: Fix alignment for DMA safety Date: Sun, 8 May 2022 18:57:04 +0100 Message-Id: <20220508175712.647246-85-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: 22d199a53910 ("iio: potentiometer: add driver for Microchip MCP413X/414X/415X/416X/423X/424X/425X/426X") Signed-off-by: Jonathan Cameron Acked-by: Nuno Sá --- drivers/iio/potentiometer/mcp4131.c | 2 +- 1 file changed, 1 insertion(+), 1 deletion(-) diff --git a/drivers/iio/potentiometer/mcp4131.c b/drivers/iio/potentiometer/mcp4131.c index 7c8c18ab8764..7890c0993ec4 100644 --- a/drivers/iio/potentiometer/mcp4131.c +++ b/drivers/iio/potentiometer/mcp4131.c @@ -129,7 +129,7 @@ struct mcp4131_data { struct spi_device *spi; const struct mcp4131_cfg *cfg; struct mutex lock; - u8 buf[2] ____cacheline_aligned; + u8 buf[2] __aligned(IIO_DMA_MINALIGN); }; #define MCP4131_CHANNEL(ch) { \