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=-3.0 required=3.0 tests=HEADER_FROM_DIFFERENT_DOMAINS, MAILING_LIST_MULTI,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 9AC13C4646D for ; Sat, 4 Aug 2018 09:11:02 +0000 (UTC) Received: from vger.kernel.org (vger.kernel.org [209.132.180.67]) by mail.kernel.org (Postfix) with ESMTP id 528B82177A for ; Sat, 4 Aug 2018 09:11:02 +0000 (UTC) DMARC-Filter: OpenDMARC Filter v1.3.2 mail.kernel.org 528B82177A Authentication-Results: mail.kernel.org; dmarc=none (p=none dis=none) header.from=linuxfoundation.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 S2389073AbeHDLK7 (ORCPT ); Sat, 4 Aug 2018 07:10:59 -0400 Received: from mail.linuxfoundation.org ([140.211.169.12]:50128 "EHLO mail.linuxfoundation.org" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S1732670AbeHDLK6 (ORCPT ); Sat, 4 Aug 2018 07:10:58 -0400 Received: from localhost (D57E6652.static.ziggozakelijk.nl [213.126.102.82]) by mail.linuxfoundation.org (Postfix) with ESMTPSA id 3C52EBBF; Sat, 4 Aug 2018 09:10:58 +0000 (UTC) From: Greg Kroah-Hartman To: linux-kernel@vger.kernel.org Cc: Greg Kroah-Hartman , stable@vger.kernel.org, Pavel Machek , Suman Anna , Laurent Pinchart , Sakari Ailus , Mauro Carvalho Chehab , Sasha Levin Subject: [PATCH 4.4 091/124] media: omap3isp: fix unbalanced dma_iommu_mapping Date: Sat, 4 Aug 2018 11:01:20 +0200 Message-Id: <20180804082705.892124473@linuxfoundation.org> X-Mailer: git-send-email 2.18.0 In-Reply-To: <20180804082702.434482435@linuxfoundation.org> References: <20180804082702.434482435@linuxfoundation.org> User-Agent: quilt/0.65 X-stable: review MIME-Version: 1.0 Content-Type: text/plain; charset=UTF-8 Sender: linux-kernel-owner@vger.kernel.org Precedence: bulk List-ID: X-Mailing-List: linux-kernel@vger.kernel.org 4.4-stable review patch. If anyone has any objections, please let me know. ------------------ From: Suman Anna [ Upstream commit b7e1e6859fbf60519fd82d7120cee106a6019512 ] The OMAP3 ISP driver manages its MMU mappings through the IOMMU-aware ARM DMA backend. The current code creates a dma_iommu_mapping and attaches this to the ISP device, but never detaches the mapping in either the probe failure paths or the driver remove path resulting in an unbalanced mapping refcount and a memory leak. Fix this properly. Reported-by: Pavel Machek Signed-off-by: Suman Anna Tested-by: Pavel Machek Reviewed-by: Laurent Pinchart Signed-off-by: Sakari Ailus Signed-off-by: Mauro Carvalho Chehab Signed-off-by: Sasha Levin Signed-off-by: Greg Kroah-Hartman --- drivers/media/platform/omap3isp/isp.c | 7 ++++--- 1 file changed, 4 insertions(+), 3 deletions(-) --- a/drivers/media/platform/omap3isp/isp.c +++ b/drivers/media/platform/omap3isp/isp.c @@ -2077,6 +2077,7 @@ error_csiphy: static void isp_detach_iommu(struct isp_device *isp) { + arm_iommu_detach_device(isp->dev); arm_iommu_release_mapping(isp->mapping); isp->mapping = NULL; iommu_group_remove_device(isp->dev); @@ -2110,8 +2111,7 @@ static int isp_attach_iommu(struct isp_d mapping = arm_iommu_create_mapping(&platform_bus_type, SZ_1G, SZ_2G); if (IS_ERR(mapping)) { dev_err(isp->dev, "failed to create ARM IOMMU mapping\n"); - ret = PTR_ERR(mapping); - goto error; + return PTR_ERR(mapping); } isp->mapping = mapping; @@ -2126,7 +2126,8 @@ static int isp_attach_iommu(struct isp_d return 0; error: - isp_detach_iommu(isp); + arm_iommu_release_mapping(isp->mapping); + isp->mapping = NULL; return ret; }