From patchwork Tue Sep 1 15:08:49 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: 264554 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=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 603AAC433E6 for ; Tue, 1 Sep 2020 16:39:04 +0000 (UTC) Received: from vger.kernel.org (vger.kernel.org [23.128.96.18]) by mail.kernel.org (Postfix) with ESMTP id 3F19B20767 for ; Tue, 1 Sep 2020 16:39:04 +0000 (UTC) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/simple; d=kernel.org; s=default; t=1598978344; bh=Ztwn8cFBu9gxC3ghYV7VyOXlbElTI34F3EuT/pfVdB0=; h=From:To:Cc:Subject:Date:In-Reply-To:References:List-ID:From; b=F6bVPZWhuUXaE+E9mCLP/4oTg1GEWkvEzevqLWuNAek8ZUYg7fmBNQuo+Qnl55vCm 0Qvr5HjNR7fPGuTUSl4vBgg4fu2oH0ZX2HiDL4vrtYmglaEc5ycK3gfXcZatHNh2BT dIRbG+c8RHaujCKdO/+F3I+chvzWUbIcINgC2HCc= Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S1730396AbgIAP2p (ORCPT ); Tue, 1 Sep 2020 11:28:45 -0400 Received: from mail.kernel.org ([198.145.29.99]:57108 "EHLO mail.kernel.org" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S1730391AbgIAP2l (ORCPT ); Tue, 1 Sep 2020 11:28:41 -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 ED0D82078B; Tue, 1 Sep 2020 15:28:33 +0000 (UTC) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/simple; d=kernel.org; s=default; t=1598974114; bh=Ztwn8cFBu9gxC3ghYV7VyOXlbElTI34F3EuT/pfVdB0=; h=From:To:Cc:Subject:Date:In-Reply-To:References:From; b=l2qNl2YJ9iKMLKggagRFQLnxx7gw1DqECTIijUwS/NTQrpWfynC5An5MyxEIkTgJL JpcPJY/yti74oQxI7UOlV3Jyd4o1E4ZuM3DVXMo9CC7pQikv1gYNPuq8vRb+kje6oP c4IUFc4yO32d6nBx06BHmg/TSOCGswdU+Bh5KU5E= 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 5.4 049/214] drm/nouveau: fix reference count leak in nv50_disp_atomic_commit Date: Tue, 1 Sep 2020 17:08:49 +0200 Message-Id: <20200901150955.330463212@linuxfoundation.org> X-Mailer: git-send-email 2.28.0 In-Reply-To: <20200901150952.963606936@linuxfoundation.org> References: <20200901150952.963606936@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 a2cdf39536b0d21fb06113f5e16692513d7bcb9c ] nv50_disp_atomic_commit() calls 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/dispnv50/disp.c | 4 +++- 1 file changed, 3 insertions(+), 1 deletion(-) diff --git a/drivers/gpu/drm/nouveau/dispnv50/disp.c b/drivers/gpu/drm/nouveau/dispnv50/disp.c index d735ea7e2d886..419a02260bfa7 100644 --- a/drivers/gpu/drm/nouveau/dispnv50/disp.c +++ b/drivers/gpu/drm/nouveau/dispnv50/disp.c @@ -2032,8 +2032,10 @@ nv50_disp_atomic_commit(struct drm_device *dev, int ret, i; ret = pm_runtime_get_sync(dev->dev); - if (ret < 0 && ret != -EACCES) + if (ret < 0 && ret != -EACCES) { + pm_runtime_put_autosuspend(dev->dev); return ret; + } ret = drm_atomic_helper_setup_commit(state, nonblock); if (ret)