From patchwork Mon Jul 12 06:07:30 2021 Content-Type: text/plain; charset="utf-8" MIME-Version: 1.0 Content-Transfer-Encoding: 7bit X-Patchwork-Submitter: Greg Kroah-Hartman X-Patchwork-Id: 476383 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=-19.4 required=3.0 tests=BAYES_00,DKIMWL_WL_HIGH, DKIM_SIGNED,DKIM_VALID,DKIM_VALID_AU,HEADER_FROM_DIFFERENT_DOMAINS, INCLUDES_CR_TRAILER, INCLUDES_PATCH, MAILING_LIST_MULTI, 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 4621FC07E9B for ; Mon, 12 Jul 2021 06:17:30 +0000 (UTC) Received: from vger.kernel.org (vger.kernel.org [23.128.96.18]) by mail.kernel.org (Postfix) with ESMTP id 2F593610F7 for ; Mon, 12 Jul 2021 06:17:30 +0000 (UTC) Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S234015AbhGLGUQ (ORCPT ); Mon, 12 Jul 2021 02:20:16 -0400 Received: from mail.kernel.org ([198.145.29.99]:38148 "EHLO mail.kernel.org" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S233814AbhGLGTs (ORCPT ); Mon, 12 Jul 2021 02:19:48 -0400 Received: by mail.kernel.org (Postfix) with ESMTPSA id 26E58610CC; Mon, 12 Jul 2021 06:17:00 +0000 (UTC) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/simple; d=linuxfoundation.org; s=korg; t=1626070620; bh=aZU4r3G57Y5xXD1IZkS1KN+47+dzWYcVJPYC0sf3gXQ=; h=From:To:Cc:Subject:Date:In-Reply-To:References:From; b=UWuh62XXQXjpOtUu0aTzv6Eft5SwTji/RDmQumTj/ooneJPg7JoNW02Q+9clJ1fjA u5RYxeTFqcXyClsvD5XckdhG9zss67EvEv90CbzynS/1Tqo5W6c8kC1Eq6ft7otHJo Kbre/Xq/ZcTNmz/RoR8qPb/KY7qDKH+MbvpNBPhE= From: Greg Kroah-Hartman To: linux-kernel@vger.kernel.org Cc: Greg Kroah-Hartman , stable@vger.kernel.org, Jonathan Cameron , Sylwester Nawrocki , Marek Szyprowski , Mauro Carvalho Chehab , Sasha Levin Subject: [PATCH 5.4 066/348] media: s5p: fix pm_runtime_get_sync() usage count Date: Mon, 12 Jul 2021 08:07:30 +0200 Message-Id: <20210712060710.794303908@linuxfoundation.org> X-Mailer: git-send-email 2.32.0 In-Reply-To: <20210712060659.886176320@linuxfoundation.org> References: <20210712060659.886176320@linuxfoundation.org> User-Agent: quilt/0.66 MIME-Version: 1.0 Precedence: bulk List-ID: X-Mailing-List: stable@vger.kernel.org From: Mauro Carvalho Chehab [ Upstream commit fdc34e82c0f968ac4c157bd3d8c299ebc24c9c63 ] The pm_runtime_get_sync() internally increments the dev->power.usage_count without decrementing it, even on errors. Replace it by the new pm_runtime_resume_and_get(), introduced by: commit dd8088d5a896 ("PM: runtime: Add pm_runtime_resume_and_get to deal with usage counter") in order to properly decrement the usage counter, avoiding a potential PM usage counter leak. While here, check if the PM runtime error was caught at s5p_cec_adap_enable(). Reviewed-by: Jonathan Cameron Reviewed-by: Sylwester Nawrocki Acked-by: Marek Szyprowski Signed-off-by: Mauro Carvalho Chehab Signed-off-by: Sasha Levin --- drivers/media/platform/s5p-cec/s5p_cec.c | 5 ++++- 1 file changed, 4 insertions(+), 1 deletion(-) diff --git a/drivers/media/platform/s5p-cec/s5p_cec.c b/drivers/media/platform/s5p-cec/s5p_cec.c index 6ddcc35b0bbd..5e80352f506b 100644 --- a/drivers/media/platform/s5p-cec/s5p_cec.c +++ b/drivers/media/platform/s5p-cec/s5p_cec.c @@ -35,10 +35,13 @@ MODULE_PARM_DESC(debug, "debug level (0-2)"); static int s5p_cec_adap_enable(struct cec_adapter *adap, bool enable) { + int ret; struct s5p_cec_dev *cec = cec_get_drvdata(adap); if (enable) { - pm_runtime_get_sync(cec->dev); + ret = pm_runtime_resume_and_get(cec->dev); + if (ret < 0) + return ret; s5p_cec_reset(cec);