From patchwork Tue Sep 1 15:10:06 2020 Content-Type: text/plain; charset="utf-8" MIME-Version: 1.0 Content-Transfer-Encoding: 7bit X-Patchwork-Submitter: Greg KH X-Patchwork-Id: 310572 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 678C7C433E7 for ; Tue, 1 Sep 2020 15:13:09 +0000 (UTC) Received: from vger.kernel.org (vger.kernel.org [23.128.96.18]) by mail.kernel.org (Postfix) with ESMTP id 45BD421527 for ; Tue, 1 Sep 2020 15:13:09 +0000 (UTC) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/simple; d=kernel.org; s=default; t=1598973189; bh=zby1bdyNKvlbw/2B9KxrATkPOOQOOknxZ7Nnr25BQoc=; h=From:To:Cc:Subject:Date:In-Reply-To:References:List-ID:From; b=Kl6zXGWToj+dVrC6dOyEP9CgzfxutxJu9qPnhqdR4pbM/klngui8GAU3BnkddCBdM AHceZnjwaHmIv9e3kgKqD95r1BjzZvNcIqIiRhx5h1fYa83Dq11e6pKiefE8aFcsbi LcVMrgVVJJZj8SP3jq96/tGyJKnh6ehMegQGAQts= Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S1728331AbgIAPNG (ORCPT ); Tue, 1 Sep 2020 11:13:06 -0400 Received: from mail.kernel.org ([198.145.29.99]:55872 "EHLO mail.kernel.org" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S1728851AbgIAPNF (ORCPT ); Tue, 1 Sep 2020 11:13:05 -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 583A1206FA; Tue, 1 Sep 2020 15:13:04 +0000 (UTC) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/simple; d=kernel.org; s=default; t=1598973184; bh=zby1bdyNKvlbw/2B9KxrATkPOOQOOknxZ7Nnr25BQoc=; h=From:To:Cc:Subject:Date:In-Reply-To:References:From; b=vWDvmPMwi+Pkp5ijDWb9VxsWAlffsgh2I4UVvcZnmteq/uhwiNqHNaaULE/roIlpJ QsIKl1kd1vXGfPHKTXwiR8WKSVA8ukpvvIg0RmO4iQ1XaLuMnnWsB1ehg8Fz0AT5nQ f0bdlfhHoDqNxoaz1EHw+ntZ5O2I9VS23DD1bQk8= 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 4.4 23/62] drm/nouveau: Fix reference count leak in nouveau_connector_detect Date: Tue, 1 Sep 2020 17:10:06 +0200 Message-Id: <20200901150921.904221454@linuxfoundation.org> X-Mailer: git-send-email 2.28.0 In-Reply-To: <20200901150920.697676718@linuxfoundation.org> References: <20200901150920.697676718@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 1855b475cc0b2..42be04813b682 100644 --- a/drivers/gpu/drm/nouveau/nouveau_connector.c +++ b/drivers/gpu/drm/nouveau/nouveau_connector.c @@ -263,8 +263,10 @@ 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);