From patchwork Sat Apr 24 06:44:14 2021 Content-Type: text/plain; charset="utf-8" MIME-Version: 1.0 Content-Transfer-Encoding: 7bit X-Patchwork-Submitter: Mauro Carvalho Chehab X-Patchwork-Id: 427013 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=-16.8 required=3.0 tests=BAYES_00,DKIM_INVALID, DKIM_SIGNED,INCLUDES_CR_TRAILER,INCLUDES_PATCH,MAILING_LIST_MULTI, SPF_HELO_NONE,SPF_NONE,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 2DE59C43603 for ; Sat, 24 Apr 2021 06:45:54 +0000 (UTC) Received: from vger.kernel.org (vger.kernel.org [23.128.96.18]) by mail.kernel.org (Postfix) with ESMTP id 10A2461481 for ; Sat, 24 Apr 2021 06:45:54 +0000 (UTC) Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S235125AbhDXGq3 (ORCPT ); Sat, 24 Apr 2021 02:46:29 -0400 Received: from mail.kernel.org ([198.145.29.99]:35724 "EHLO mail.kernel.org" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S230471AbhDXGqL (ORCPT ); Sat, 24 Apr 2021 02:46:11 -0400 Received: by mail.kernel.org (Postfix) with ESMTPSA id 00F5561490; Sat, 24 Apr 2021 06:45:32 +0000 (UTC) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/simple; d=kernel.org; s=k20201202; t=1619246733; bh=vlWzPcglj3c5YNM8fjCOIG3b1giv6Ug3RyqxVuPOXCU=; h=From:To:Cc:Subject:Date:In-Reply-To:References:From; b=o3EHnDj8lhhvnbL6MRbpHKQ/z5hcFwYB1uy5+C27DD6o3NjrCIAnM8ePevlYORY1E vDCdRSv/aGJRGra5RwV34014Euwi8obXklrpKcV/B0nbgOrDzQJDukjCPF2dKYXtJx aRb17bfiiUsJsB3ed19jypufTmKuczryK+6CX/Z5eAGEblROp19TX6LRptFxkMdhxw SXgUcfLSF6tHZWkCs0N/w9Y40O6Bd1CjS+nfLgWiI+S6eJ7+oXwzkBBpXUPXzebuxA yF/oLgT53PzqbltJZ5DQX8XNegGPKaC7G+ohOZmkSSpePo0goIgxJUgHV1Io+vzjb2 oDJCxo5PtSS2w== Received: by mail.kernel.org with local (Exim 4.94) (envelope-from ) id 1laC2k-004Jdu-Vn; Sat, 24 Apr 2021 08:45:30 +0200 From: Mauro Carvalho Chehab Cc: linuxarm@huawei.com, mauro.chehab@huawei.com, Mauro Carvalho Chehab , Kieran Bingham , Mauro Carvalho Chehab , linux-kernel@vger.kernel.org, linux-media@vger.kernel.org, linux-renesas-soc@vger.kernel.org Subject: [PATCH 04/78] media: rcar_fdp1: fix pm_runtime_get_sync() usage count Date: Sat, 24 Apr 2021 08:44:14 +0200 Message-Id: X-Mailer: git-send-email 2.30.2 In-Reply-To: References: MIME-Version: 1.0 Sender: Mauro Carvalho Chehab To: unlisted-recipients:; (no To-header on input) Precedence: bulk List-ID: X-Mailing-List: linux-media@vger.kernel.org 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 and avoid memory leaks. Also, right now, the driver is ignoring any troubles when trying to do PM resume. So, add the proper error handling for the code. Signed-off-by: Mauro Carvalho Chehab --- drivers/media/platform/rcar_fdp1.c | 12 ++++++++++-- 1 file changed, 10 insertions(+), 2 deletions(-) diff --git a/drivers/media/platform/rcar_fdp1.c b/drivers/media/platform/rcar_fdp1.c index 01c1fbb97bf6..c32d237af618 100644 --- a/drivers/media/platform/rcar_fdp1.c +++ b/drivers/media/platform/rcar_fdp1.c @@ -2140,7 +2140,13 @@ static int fdp1_open(struct file *file) } /* Perform any power management required */ - pm_runtime_get_sync(fdp1->dev); + ret = pm_runtime_resume_and_get(fdp1->dev); + if (ret < 0) { + v4l2_m2m_ctx_release(ctx->fh.m2m_ctx); + v4l2_ctrl_handler_free(&ctx->hdl); + kfree(ctx); + goto done; + } v4l2_fh_add(&ctx->fh); @@ -2351,7 +2357,9 @@ static int fdp1_probe(struct platform_device *pdev) /* Power up the cells to read HW */ pm_runtime_enable(&pdev->dev); - pm_runtime_get_sync(fdp1->dev); + ret = pm_runtime_resume_and_get(fdp1->dev); + if (ret < 0) + return ret; hw_version = fdp1_read(fdp1, FD1_IP_INTDATA); switch (hw_version) {