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 X-Spam-Level: X-Spam-Status: No, score=-9.7 required=3.0 tests=DKIMWL_WL_HIGH,DKIM_SIGNED, DKIM_VALID,DKIM_VALID_AU,INCLUDES_PATCH,MAILING_LIST_MULTI,SIGNED_OFF_BY, SPF_PASS,URIBL_BLOCKED,USER_AGENT_GIT autolearn=ham autolearn_force=no version=3.4.0 Received: from mail.kernel.org (mail.kernel.org [198.145.29.99]) by smtp.lore.kernel.org (Postfix) with ESMTP id A0BE1C43610 for ; Wed, 14 Nov 2018 22:41:55 +0000 (UTC) Received: from vger.kernel.org (vger.kernel.org [209.132.180.67]) by mail.kernel.org (Postfix) with ESMTP id 681962145D for ; Wed, 14 Nov 2018 22:41:55 +0000 (UTC) Authentication-Results: mail.kernel.org; dkim=pass (1024-bit key) header.d=kernel.org header.i=@kernel.org header.b="rYLhixoL" DMARC-Filter: OpenDMARC Filter v1.3.2 mail.kernel.org 681962145D Authentication-Results: mail.kernel.org; dmarc=fail (p=none dis=none) header.from=kernel.org Authentication-Results: mail.kernel.org; spf=none smtp.mailfrom=linux-kernel-owner@vger.kernel.org Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S2388141AbeKOIrD (ORCPT ); Thu, 15 Nov 2018 03:47:03 -0500 Received: from mail.kernel.org ([198.145.29.99]:34416 "EHLO mail.kernel.org" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S1728859AbeKOI1X (ORCPT ); Thu, 15 Nov 2018 03:27:23 -0500 Received: from sasha-vm.mshome.net (unknown [64.114.255.114]) (using TLSv1.2 with cipher ECDHE-RSA-AES128-GCM-SHA256 (128/128 bits)) (No client certificate requested) by mail.kernel.org (Postfix) with ESMTPSA id B139722520; Wed, 14 Nov 2018 22:22:19 +0000 (UTC) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/simple; d=kernel.org; s=default; t=1542234139; bh=5lI+K5NSyp7s4MwR6HKE1/hXONzq412IaY/HDK6pCYI=; h=From:To:Cc:Subject:Date:In-Reply-To:References:From; b=rYLhixoLdxYSt7IngROGVS4+Rf6WPdCNUSGCepuzAjfDPJllcrQKeOa7xktE7eBNY pvuJxTdNYyFpXH+XEsxfaSsk3garcm6CytAQorZs2z+WA7tUQAtAc3bTSdUbnwo+OU BgUnXBBqUGLK1A7B1UpJx9i8i0EUhEA8MJzOCZlM= From: Sasha Levin To: stable@vger.kernel.org, linux-kernel@vger.kernel.org Cc: Robin Murphy , Rob Herring , Sasha Levin Subject: [PATCH AUTOSEL 4.19 48/73] of/device: Really only set bus DMA mask when appropriate Date: Wed, 14 Nov 2018 17:21:42 -0500 Message-Id: <20181114222207.98701-48-sashal@kernel.org> X-Mailer: git-send-email 2.17.1 In-Reply-To: <20181114222207.98701-1-sashal@kernel.org> References: <20181114222207.98701-1-sashal@kernel.org> Sender: linux-kernel-owner@vger.kernel.org Precedence: bulk List-ID: X-Mailing-List: linux-kernel@vger.kernel.org From: Robin Murphy [ Upstream commit 6778be4e520959659b27a441c06a84c9cb009085 ] of_dma_configure() was *supposed* to be following the same logic as acpi_dma_configure() and only setting bus_dma_mask if some range was specified by the firmware. However, it seems that subtlety got lost in the process of fitting it into the differently-shaped control flow, and as a result the force_dma==true case ends up always setting the bus mask to the 32-bit default, which is not what anyone wants. Make sure we only touch it if the DT actually said so. Fixes: 6c2fb2ea7636 ("of/device: Set bus DMA mask as appropriate") Reported-by: Aaro Koskinen Reported-by: Jean-Philippe Brucker Tested-by: Aaro Koskinen Tested-by: John Stultz Tested-by: Geert Uytterhoeven Tested-by: Robert Richter Signed-off-by: Robin Murphy Signed-off-by: Rob Herring Signed-off-by: Sasha Levin --- drivers/of/device.c | 4 +++- 1 file changed, 3 insertions(+), 1 deletion(-) diff --git a/drivers/of/device.c b/drivers/of/device.c index 5957cd4fa262..40b9051a7fce 100644 --- a/drivers/of/device.c +++ b/drivers/of/device.c @@ -149,9 +149,11 @@ int of_dma_configure(struct device *dev, struct device_node *np, bool force_dma) * set by the driver. */ mask = DMA_BIT_MASK(ilog2(dma_addr + size - 1) + 1); - dev->bus_dma_mask = mask; dev->coherent_dma_mask &= mask; *dev->dma_mask &= mask; + /* ...but only set bus mask if we found valid dma-ranges earlier */ + if (!ret) + dev->bus_dma_mask = mask; coherent = of_dma_is_coherent(np); dev_dbg(dev, "device is%sdma coherent\n", -- 2.17.1