From nobody Mon Sep 29 20:17:20 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 265BBC00140 for ; Tue, 16 Aug 2022 00:15:02 +0000 (UTC) Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S1352139AbiHPAPA (ORCPT ); Mon, 15 Aug 2022 20:15:00 -0400 Received: from lindbergh.monkeyblade.net ([23.128.96.19]:46398 "EHLO lindbergh.monkeyblade.net" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S1357285AbiHPAEE (ORCPT ); Mon, 15 Aug 2022 20:04:04 -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 AC764CC317; Mon, 15 Aug 2022 13:28:07 -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 CBF7A61187; Mon, 15 Aug 2022 20:28:06 +0000 (UTC) Received: by smtp.kernel.org (Postfix) with ESMTPSA id C22DEC433C1; Mon, 15 Aug 2022 20:28:05 +0000 (UTC) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/simple; d=linuxfoundation.org; s=korg; t=1660595286; bh=dNFBnbzURibeCT2P3eZZy7892rCSoDAp9zS8hNV0w5c=; h=From:To:Cc:Subject:Date:In-Reply-To:References:From; b=xN9q9MOdDgP2vnkSUq0McM1cRqqdPB0cWay9+HU2XdmyPVNXaaT5kXbPm6uWx2RAg q3darCVFskUdfp+TrOgiPjKZMM4j/bEYFCtt/ZJX93WcoMDXZRibJXnNftHS0lndmg oQkxbqxv8QeDku1Vw9SkGT0ZO03MJbYXXngkKQrs= From: Greg Kroah-Hartman To: linux-kernel@vger.kernel.org Cc: Greg Kroah-Hartman , stable@vger.kernel.org, Jonathan Cameron , =?UTF-8?q?Nuno=20S=C3=A1?= , Michael Welling , Sasha Levin Subject: [PATCH 5.19 0689/1157] iio: dac: mcp4922: Fix alignment for DMA safety Date: Mon, 15 Aug 2022 20:00:45 +0200 Message-Id: <20220815180507.181610102@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 e66bf04797f1f95a2402414c00e64d00f63d31ec ] ____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: 1b791fadf3a1 ("iio: dac: mcp4902/mcp4912/mcp4922 dac driver") Signed-off-by: Jonathan Cameron Acked-by: Nuno S=C3=A1 Acked-by: Michael Welling Link: https://lore.kernel.org/r/20220508175712.647246-61-jic23@kernel.org Signed-off-by: Sasha Levin --- drivers/iio/dac/mcp4922.c | 2 +- 1 file changed, 1 insertion(+), 1 deletion(-) diff --git a/drivers/iio/dac/mcp4922.c b/drivers/iio/dac/mcp4922.c index cb9e60e71b91..6c0e31032c57 100644 --- a/drivers/iio/dac/mcp4922.c +++ b/drivers/iio/dac/mcp4922.c @@ -29,7 +29,7 @@ struct mcp4922_state { unsigned int value[MCP4922_NUM_CHANNELS]; unsigned int vref_mv; struct regulator *vref_reg; - u8 mosi[2] ____cacheline_aligned; + u8 mosi[2] __aligned(IIO_DMA_MINALIGN); }; =20 #define MCP4922_CHAN(chan, bits) { \ --=20 2.35.1