From patchwork Fri Jun 19 14:30:31 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: 223770 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=-6.8 required=3.0 tests=DKIMWL_WL_HIGH, DKIM_SIGNED, DKIM_VALID, HEADER_FROM_DIFFERENT_DOMAINS, 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 6FEB1C433E3 for ; Fri, 19 Jun 2020 16:28:14 +0000 (UTC) Received: from vger.kernel.org (vger.kernel.org [23.128.96.18]) by mail.kernel.org (Postfix) with ESMTP id 452A3217A0 for ; Fri, 19 Jun 2020 16:28:14 +0000 (UTC) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/simple; d=kernel.org; s=default; t=1592584094; bh=5dr3/E5uEsN9OBtHtX5x2lJSF9gcAv4pYuxes95uq4A=; h=From:To:Cc:Subject:Date:In-Reply-To:References:List-ID:From; b=xVxK6uvGxt2Y+7yHKAeKdhn4HKGaNO71wFNQteVwq2BHO6jLNrJbNqbyFtcrkyz1X cxayWPr4/mDFCmxNq6IkoIUMlXeXN7Z879Y91Q8vyVRzjqthiB5OaxOAuAUlEGwRoL 6hyQDhZLHImLB/61YslWGJeREhx69cwVMUhK1d3Q= Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S2389921AbgFSOzE (ORCPT ); Fri, 19 Jun 2020 10:55:04 -0400 Received: from mail.kernel.org ([198.145.29.99]:49796 "EHLO mail.kernel.org" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S2389920AbgFSOzC (ORCPT ); Fri, 19 Jun 2020 10:55:02 -0400 Received: from localhost (83-86-89-107.cable.dynamic.v4.ziggo.nl [83.86.89.107]) (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 A0F1421556; Fri, 19 Jun 2020 14:55:01 +0000 (UTC) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/simple; d=kernel.org; s=default; t=1592578502; bh=5dr3/E5uEsN9OBtHtX5x2lJSF9gcAv4pYuxes95uq4A=; h=From:To:Cc:Subject:Date:In-Reply-To:References:From; b=biYEthR+hklg1dM8BdMcMcntZCQAoC5xDOlCvEzjYxE6HigIiEc1f+fz0zRqP26ig quTFWf4IdYUbev5gIKe9Zm8jBEQ72RoqfzFCfX8wRyGCFxFvPCYGaBdoAP+fmlBOls viOT08jgRSJqwLFIg7WC9yfeNLu/DVR9v4xbhuQ8= From: Greg Kroah-Hartman To: linux-kernel@vger.kernel.org Cc: Greg Kroah-Hartman , stable@vger.kernel.org, "Rafael J. Wysocki" , Ulf Hansson Subject: [PATCH 4.19 046/267] PM: runtime: clk: Fix clk_pm_runtime_get() error path Date: Fri, 19 Jun 2020 16:30:31 +0200 Message-Id: <20200619141651.105716983@linuxfoundation.org> X-Mailer: git-send-email 2.27.0 In-Reply-To: <20200619141648.840376470@linuxfoundation.org> References: <20200619141648.840376470@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: Rafael J. Wysocki commit 64c7d7ea22d86cacb65d0c097cc447bc0e6d8abd upstream. clk_pm_runtime_get() assumes that the PM-runtime usage counter will be dropped by pm_runtime_get_sync() on errors, which is not the case, so PM-runtime references to devices acquired by the former are leaked on errors returned by the latter. Fix this by modifying clk_pm_runtime_get() to drop the reference if pm_runtime_get_sync() returns an error. Fixes: 9a34b45397e5 clk: Add support for runtime PM Cc: 4.15+ # 4.15+ Signed-off-by: Rafael J. Wysocki Reviewed-by: Ulf Hansson Signed-off-by: Greg Kroah-Hartman --- drivers/clk/clk.c | 6 +++++- 1 file changed, 5 insertions(+), 1 deletion(-) --- a/drivers/clk/clk.c +++ b/drivers/clk/clk.c @@ -101,7 +101,11 @@ static int clk_pm_runtime_get(struct clk return 0; ret = pm_runtime_get_sync(core->dev); - return ret < 0 ? ret : 0; + if (ret < 0) { + pm_runtime_put_noidle(core->dev); + return ret; + } + return 0; } static void clk_pm_runtime_put(struct clk_core *core)