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=-13.1 required=3.0 tests=BAYES_00,DKIMWL_WL_HIGH, DKIM_SIGNED,DKIM_VALID,DKIM_VALID_AU,INCLUDES_PATCH,MAILING_LIST_MULTI, SIGNED_OFF_BY,SPF_HELO_NONE,SPF_PASS,USER_AGENT_GIT autolearn=unavailable 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 3A8F2C433DF for ; Fri, 21 Aug 2020 16:43:07 +0000 (UTC) Received: from vger.kernel.org (vger.kernel.org [23.128.96.18]) by mail.kernel.org (Postfix) with ESMTP id 048D920738 for ; Fri, 21 Aug 2020 16:43:07 +0000 (UTC) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/simple; d=kernel.org; s=default; t=1598028187; bh=+kyZgUC/JHtbawVqpoq6Xdj7xlg/o4HBmeOnAb9JsJc=; h=From:To:Cc:Subject:Date:In-Reply-To:References:List-ID:From; b=MA4DmQ1pKviv1OWo2CYKF0hQMLseiWiMhCQ+wL+A9Z+/eSU+vMu3X6vxTvOaE1T7P oVTpZWFU+sc2Y23wLTSXzuG7eOTe6Q15QTOnmVtiOK8tTMziNKsG8A4Fom1qt/Kfy8 mOI+1RW/KQPV6CHlWpq+DgP91zAt0lVb+aA3bVes= Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S1728549AbgHUQmx (ORCPT ); Fri, 21 Aug 2020 12:42:53 -0400 Received: from mail.kernel.org ([198.145.29.99]:50258 "EHLO mail.kernel.org" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S1728398AbgHUQUn (ORCPT ); Fri, 21 Aug 2020 12:20:43 -0400 Received: from sasha-vm.mshome.net (c-73-47-72-35.hsd1.nh.comcast.net [73.47.72.35]) (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 1130422D01; Fri, 21 Aug 2020 16:19:51 +0000 (UTC) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/simple; d=kernel.org; s=default; t=1598026792; bh=+kyZgUC/JHtbawVqpoq6Xdj7xlg/o4HBmeOnAb9JsJc=; h=From:To:Cc:Subject:Date:In-Reply-To:References:From; b=KIAkXNu09hgVVCft0ppbb3/faQoX19/1TMIg82KXh7T+V980Koio3Q6L4dykIsaly gB0zXRNQ/Mo/mMj047gGpOAlH7yVTgeNrNRl/bZ7qMU0kXOn5TtN6DQqwcLncr24Ae vUFIceVA2T7SdbP8miz0QLxBCenXParEpxfYBzUc= From: Sasha Levin To: linux-kernel@vger.kernel.org, stable@vger.kernel.org Cc: Navid Emamdoost , Alex Deucher , Sasha Levin , amd-gfx@lists.freedesktop.org, dri-devel@lists.freedesktop.org Subject: [PATCH AUTOSEL 4.9 11/26] drm/amdgpu: fix ref count leak in amdgpu_display_crtc_set_config Date: Fri, 21 Aug 2020 12:19:22 -0400 Message-Id: <20200821161938.349246-11-sashal@kernel.org> X-Mailer: git-send-email 2.25.1 In-Reply-To: <20200821161938.349246-1-sashal@kernel.org> References: <20200821161938.349246-1-sashal@kernel.org> MIME-Version: 1.0 X-stable: review X-Patchwork-Hint: Ignore Content-Transfer-Encoding: 8bit Sender: linux-kernel-owner@vger.kernel.org Precedence: bulk List-ID: X-Mailing-List: linux-kernel@vger.kernel.org From: Navid Emamdoost [ Upstream commit e008fa6fb41544b63973a529b704ef342f47cc65 ] in amdgpu_display_crtc_set_config, the call to pm_runtime_get_sync increments the counter even in case of failure, leading to incorrect ref count. In case of failure, decrement the ref count before returning. Signed-off-by: Navid Emamdoost Signed-off-by: Alex Deucher Signed-off-by: Sasha Levin --- drivers/gpu/drm/amd/amdgpu/amdgpu_display.c | 5 +++-- 1 file changed, 3 insertions(+), 2 deletions(-) diff --git a/drivers/gpu/drm/amd/amdgpu/amdgpu_display.c b/drivers/gpu/drm/amd/amdgpu/amdgpu_display.c index 15a2d8f3725d5..fdf7a18058881 100644 --- a/drivers/gpu/drm/amd/amdgpu/amdgpu_display.c +++ b/drivers/gpu/drm/amd/amdgpu/amdgpu_display.c @@ -268,7 +268,7 @@ int amdgpu_crtc_set_config(struct drm_mode_set *set) ret = pm_runtime_get_sync(dev->dev); if (ret < 0) - return ret; + goto out; ret = drm_crtc_helper_set_config(set); @@ -283,7 +283,7 @@ int amdgpu_crtc_set_config(struct drm_mode_set *set) take the current one */ if (active && !adev->have_disp_power_ref) { adev->have_disp_power_ref = true; - return ret; + goto out; } /* if we have no active crtcs, then drop the power ref we got before */ @@ -292,6 +292,7 @@ int amdgpu_crtc_set_config(struct drm_mode_set *set) adev->have_disp_power_ref = false; } +out: /* drop the power reference we got coming in here */ pm_runtime_put_autosuspend(dev->dev); return ret; -- 2.25.1