From patchwork Tue Sep 1 15:10:03 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: 264817 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 86E68C433E7 for ; Tue, 1 Sep 2020 15:16:59 +0000 (UTC) Received: from vger.kernel.org (vger.kernel.org [23.128.96.18]) by mail.kernel.org (Postfix) with ESMTP id 5D8FC20767 for ; Tue, 1 Sep 2020 15:16:59 +0000 (UTC) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/simple; d=kernel.org; s=default; t=1598973419; bh=uJ5hr/BkApOEtAIV5QvXoZdJrm3MvhcHt22zyFLzypM=; h=From:To:Cc:Subject:Date:In-Reply-To:References:List-ID:From; b=QuWXzZLEfB/VJL/mD9oizM7vCVL6iPyt/zE1jgyBjB9ExhX14OdbD2uR/t9nZDbe1 PpbxZXaKc6ZHHxkVoHeyvp8FmfJBEA3In3Y+mAZv5vJOkDvroVJn3AShGvahBybY/f 8hJKyOylrWF+OQIewdYx3x0cs3gN17ldX4CHSs2Y= Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S1729352AbgIAPQ4 (ORCPT ); Tue, 1 Sep 2020 11:16:56 -0400 Received: from mail.kernel.org ([198.145.29.99]:33920 "EHLO mail.kernel.org" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S1728963AbgIAPQx (ORCPT ); Tue, 1 Sep 2020 11:16:53 -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 1E7A0206FA; Tue, 1 Sep 2020 15:16:51 +0000 (UTC) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/simple; d=kernel.org; s=default; t=1598973412; bh=uJ5hr/BkApOEtAIV5QvXoZdJrm3MvhcHt22zyFLzypM=; h=From:To:Cc:Subject:Date:In-Reply-To:References:From; b=ckFVjyVLuwknXvDQTQxYyKYReXiP2wBozmLEIaBmVJHGGZsZg+bIEZVQZV60RuINj kjC/QUmRzkmW8DqzgVxEeh9k8YthOxfQEDrHtV5wYFRB7CA637V8gnghFRtCKARQWT TF6WSoKJA05Cv6XOffOYrK/xl4kRUD16BDmZYKuk= From: Greg Kroah-Hartman To: linux-kernel@vger.kernel.org Cc: Greg Kroah-Hartman , stable@vger.kernel.org, Aditya Pakki , Ben Skeggs , Sasha Levin Subject: [PATCH 4.9 27/78] drm/nouveau: Fix reference count leak in nouveau_connector_detect Date: Tue, 1 Sep 2020 17:10:03 +0200 Message-Id: <20200901150926.102452767@linuxfoundation.org> X-Mailer: git-send-email 2.28.0 In-Reply-To: <20200901150924.680106554@linuxfoundation.org> References: <20200901150924.680106554@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: Aditya Pakki [ Upstream commit 990a1162986e8eff7ca18cc5a0e03b4304392ae2 ] nouveau_connector_detect() calls pm_runtime_get_sync and in turn increments the reference count. In case of failure, decrement the ref count before returning the error. Signed-off-by: Aditya Pakki Signed-off-by: Ben Skeggs Signed-off-by: Sasha Levin --- drivers/gpu/drm/nouveau/nouveau_connector.c | 4 +++- 1 file changed, 3 insertions(+), 1 deletion(-) diff --git a/drivers/gpu/drm/nouveau/nouveau_connector.c b/drivers/gpu/drm/nouveau/nouveau_connector.c index 5bfae1f972c74..0061deca290a4 100644 --- a/drivers/gpu/drm/nouveau/nouveau_connector.c +++ b/drivers/gpu/drm/nouveau/nouveau_connector.c @@ -281,8 +281,10 @@ nouveau_connector_detect(struct drm_connector *connector, bool force) pm_runtime_get_noresume(dev->dev); } else { ret = pm_runtime_get_sync(dev->dev); - if (ret < 0 && ret != -EACCES) + if (ret < 0 && ret != -EACCES) { + pm_runtime_put_autosuspend(dev->dev); return conn_status; + } } nv_encoder = nouveau_connector_ddc_detect(connector);