From mboxrd@z Thu Jan 1 00:00:00 1970 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=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 D476EC07E9B for ; Mon, 12 Jul 2021 08:18:36 +0000 (UTC) Received: from vger.kernel.org (vger.kernel.org [23.128.96.18]) by mail.kernel.org (Postfix) with ESMTP id B77746145A for ; Mon, 12 Jul 2021 08:18:36 +0000 (UTC) Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S1350277AbhGLIVX (ORCPT ); Mon, 12 Jul 2021 04:21:23 -0400 Received: from mail.kernel.org ([198.145.29.99]:51916 "EHLO mail.kernel.org" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S245492AbhGLHhM (ORCPT ); Mon, 12 Jul 2021 03:37:12 -0400 Received: by mail.kernel.org (Postfix) with ESMTPSA id 639456193D; Mon, 12 Jul 2021 07:33:10 +0000 (UTC) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/simple; d=linuxfoundation.org; s=korg; t=1626075190; bh=9I4P98nw/TH7inHBdRHqWHOLI2uqRL4qTkQnABJ42dA=; h=From:To:Cc:Subject:Date:In-Reply-To:References:From; b=J+TmvcSrdyie8NiJ7FZUvOpLRlKjB6GNDJxjp1gQdT3gZ1cWnyz7lJJDPpWkjlDN0 vFSxjDvFNVk6fSGpabE20aLF1EEsayOIuGGDRCFw6xfuplwQdhTBnogBU3CU0JkfX8 1hshEH8PB1jo2T0FQECUugkUGN7cLQOmZ8Jxooeo= From: Greg Kroah-Hartman To: linux-kernel@vger.kernel.org Cc: Greg Kroah-Hartman , stable@vger.kernel.org, Jonathan Cameron , Mauro Carvalho Chehab , Sasha Levin Subject: [PATCH 5.13 135/800] media: sh_vou: fix pm_runtime_get_sync() usage count Date: Mon, 12 Jul 2021 08:02:38 +0200 Message-Id: <20210712060932.034703069@linuxfoundation.org> X-Mailer: git-send-email 2.32.0 In-Reply-To: <20210712060912.995381202@linuxfoundation.org> References: <20210712060912.995381202@linuxfoundation.org> User-Agent: quilt/0.66 MIME-Version: 1.0 Content-Type: text/plain; charset=UTF-8 Content-Transfer-Encoding: 8bit Precedence: bulk List-ID: X-Mailing-List: linux-kernel@vger.kernel.org From: Mauro Carvalho Chehab [ Upstream commit 6e8b1526db164c9d4b9dacfb9bc48e365d7c4860 ] 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 open time. Reviewed-by: Jonathan Cameron Signed-off-by: Mauro Carvalho Chehab Signed-off-by: Sasha Levin --- drivers/media/platform/sh_vou.c | 6 +++++- 1 file changed, 5 insertions(+), 1 deletion(-) diff --git a/drivers/media/platform/sh_vou.c b/drivers/media/platform/sh_vou.c index 4ac48441f22c..ca4310e26c49 100644 --- a/drivers/media/platform/sh_vou.c +++ b/drivers/media/platform/sh_vou.c @@ -1133,7 +1133,11 @@ static int sh_vou_open(struct file *file) if (v4l2_fh_is_singular_file(file) && vou_dev->status == SH_VOU_INITIALISING) { /* First open */ - pm_runtime_get_sync(vou_dev->v4l2_dev.dev); + err = pm_runtime_resume_and_get(vou_dev->v4l2_dev.dev); + if (err < 0) { + v4l2_fh_release(file); + goto done_open; + } err = sh_vou_hw_init(vou_dev); if (err < 0) { pm_runtime_put(vou_dev->v4l2_dev.dev); -- 2.30.2