From patchwork Tue Sep 1 15:08:03 2020 Content-Type: text/plain; charset="utf-8" MIME-Version: 1.0 Content-Transfer-Encoding: 7bit X-Patchwork-Submitter: Greg Kroah-Hartman X-Patchwork-Id: 310480 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=-13.0 required=3.0 tests=BAYES_00,DKIMWL_WL_HIGH, DKIM_SIGNED, DKIM_VALID, HEADER_FROM_DIFFERENT_DOMAINS, INCLUDES_PATCH, MAILING_LIST_MULTI, SIGNED_OFF_BY, SPF_HELO_NONE, 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 4D5CEC433E6 for ; Tue, 1 Sep 2020 15:36:52 +0000 (UTC) Received: from vger.kernel.org (vger.kernel.org [23.128.96.18]) by mail.kernel.org (Postfix) with ESMTP id 0EC8C2158C for ; Tue, 1 Sep 2020 15:36:52 +0000 (UTC) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/simple; d=kernel.org; s=default; t=1598974612; bh=W2rAa3hVKvGfCtUIdsWN4znjxtVhRCXRyUpQdLekit0=; h=From:To:Cc:Subject:Date:In-Reply-To:References:List-ID:From; b=B1HJFJspIUmxIAa4n3Te1EjyaT/DMe/OCRnn9EKaJeBkUB48VxCFDdZDD9EHO+8co v7PK5sbaEm2/IA0AxGPyCj7cBsy3frURkuel90vthogAN6oD/aOTmMVeJNjr1L4OI+ 7QTjGmXGvzdC5Yex3Lxj8sBXUs3P5Tv0eJ/fKHq4= Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S1731300AbgIAPgu (ORCPT ); Tue, 1 Sep 2020 11:36:50 -0400 Received: from mail.kernel.org ([198.145.29.99]:44206 "EHLO mail.kernel.org" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S1731293AbgIAPgt (ORCPT ); Tue, 1 Sep 2020 11:36:49 -0400 Received: from localhost (83-86-74-64.cable.dynamic.v4.ziggo.nl [83.86.74.64]) (using TLSv1.2 with cipher ECDHE-RSA-AES256-GCM-SHA384 (256/256 bits)) (No client certificate requested) by mail.kernel.org (Postfix) with ESMTPSA id 8CA4020866; Tue, 1 Sep 2020 15:36:48 +0000 (UTC) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/simple; d=kernel.org; s=default; t=1598974609; bh=W2rAa3hVKvGfCtUIdsWN4znjxtVhRCXRyUpQdLekit0=; h=From:To:Cc:Subject:Date:In-Reply-To:References:From; b=bHfgfg4QVliNbGxuYg90/xDDAs0i/SxRF9DPz5pzOCV0abqMAIOjuega5PZsfGKYM BZjUJKi2Pkn6moiAaKt04kgCZoJiRDwaLkQbnuLfQaHk0dsVd1vEIbIRVxbWviO6EQ 7/VwpT/IhcwiALPGMCnVyVlpau69ezPbxre1cGCs= From: Greg Kroah-Hartman To: linux-kernel@vger.kernel.org Cc: Greg Kroah-Hartman , stable@vger.kernel.org, Navid Emamdoost , Alex Deucher , Sasha Levin Subject: [PATCH 5.8 027/255] drm/amdgpu: fix ref count leak in amdgpu_display_crtc_set_config Date: Tue, 1 Sep 2020 17:08:03 +0200 Message-Id: <20200901151002.076582814@linuxfoundation.org> X-Mailer: git-send-email 2.28.0 In-Reply-To: <20200901151000.800754757@linuxfoundation.org> References: <20200901151000.800754757@linuxfoundation.org> User-Agent: quilt/0.66 MIME-Version: 1.0 Sender: stable-owner@vger.kernel.org Precedence: bulk List-ID: X-Mailing-List: stable@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 f7143d927b6d8..5e51f0acf744f 100644 --- a/drivers/gpu/drm/amd/amdgpu/amdgpu_display.c +++ b/drivers/gpu/drm/amd/amdgpu/amdgpu_display.c @@ -282,7 +282,7 @@ int amdgpu_display_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, ctx); @@ -297,7 +297,7 @@ int amdgpu_display_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 */ @@ -306,6 +306,7 @@ int amdgpu_display_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;