From mboxrd@z Thu Jan 1 00:00:00 1970 Return-Path: Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S1752622AbbIOMnk (ORCPT ); Tue, 15 Sep 2015 08:43:40 -0400 Received: from smtp.codeaurora.org ([198.145.29.96]:48959 "EHLO smtp.codeaurora.org" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S1752535AbbIOMnh (ORCPT ); Tue, 15 Sep 2015 08:43:37 -0400 From: Stephane Viau To: dri-devel@lists.freedesktop.org Cc: linux-arm-msm@vger.kernel.org, linux-kernel@vger.kernel.org, robdclark@gmail.com, Stephane Viau Subject: [PATCH 03/10] drm/msm: Fix IOMMU clean up path in case msm_iommu_new() fails Date: Tue, 15 Sep 2015 08:41:46 -0400 Message-Id: <1442320913-3248-4-git-send-email-sviau@codeaurora.org> X-Mailer: git-send-email 1.8.2.1 In-Reply-To: <1442320913-3248-1-git-send-email-sviau@codeaurora.org> References: <1442320913-3248-1-git-send-email-sviau@codeaurora.org> Sender: linux-kernel-owner@vger.kernel.org List-ID: X-Mailing-List: linux-kernel@vger.kernel.org msm_iommu_new() can fail and this change makes sure that we detect the failure and free the allocated domain before going any further. Signed-off-by: Stephane Viau --- drivers/gpu/drm/msm/mdp/mdp5/mdp5_kms.c | 1 + drivers/gpu/drm/msm/msm_gpu.c | 8 ++++++++ 2 files changed, 9 insertions(+) diff --git a/drivers/gpu/drm/msm/mdp/mdp5/mdp5_kms.c b/drivers/gpu/drm/msm/mdp/mdp5/mdp5_kms.c index 14ac20a..e11028c6 100644 --- a/drivers/gpu/drm/msm/mdp/mdp5/mdp5_kms.c +++ b/drivers/gpu/drm/msm/mdp/mdp5/mdp5_kms.c @@ -590,6 +590,7 @@ struct msm_kms *mdp5_kms_init(struct drm_device *dev) if (IS_ERR(mmu)) { ret = PTR_ERR(mmu); dev_err(dev->dev, "failed to init iommu: %d\n", ret); + iommu_domain_free(config->platform.iommu); goto fail; } diff --git a/drivers/gpu/drm/msm/msm_gpu.c b/drivers/gpu/drm/msm/msm_gpu.c index 5d31b5a..aed9f37 100644 --- a/drivers/gpu/drm/msm/msm_gpu.c +++ b/drivers/gpu/drm/msm/msm_gpu.c @@ -651,6 +651,14 @@ int msm_gpu_init(struct drm_device *drm, struct platform_device *pdev, if (iommu) { dev_info(drm->dev, "%s: using IOMMU\n", name); gpu->mmu = msm_iommu_new(&pdev->dev, iommu); + if (IS_ERR(gpu->mmu)) { + ret = PTR_ERR(gpu->mmu); + dev_err(drm->dev, "failed to init iommu: %d\n", ret); + gpu->mmu = NULL; + iommu_domain_free(iommu); + goto fail; + } + } else { dev_info(drm->dev, "%s: no IOMMU, fallback to VRAM carveout!\n", name); } -- Qualcomm Innovation Center, Inc. The Qualcomm Innovation Center, Inc. is a member of the Code Aurora Forum, a Linux Foundation Collaborative Project