From patchwork Mon Jul 12 06:07:29 2021 Content-Type: text/plain; charset="utf-8" MIME-Version: 1.0 Content-Transfer-Encoding: 7bit X-Patchwork-Submitter: Greg KH X-Patchwork-Id: 474589 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 2D5A5C07E9B for ; Mon, 12 Jul 2021 06:17:27 +0000 (UTC) Received: from vger.kernel.org (vger.kernel.org [23.128.96.18]) by mail.kernel.org (Postfix) with ESMTP id 18B0B610CB for ; Mon, 12 Jul 2021 06:17:27 +0000 (UTC) Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S233967AbhGLGUN (ORCPT ); Mon, 12 Jul 2021 02:20:13 -0400 Received: from mail.kernel.org ([198.145.29.99]:36666 "EHLO mail.kernel.org" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S233899AbhGLGTq (ORCPT ); Mon, 12 Jul 2021 02:19:46 -0400 Received: by mail.kernel.org (Postfix) with ESMTPSA id B6057610E5; Mon, 12 Jul 2021 06:16:57 +0000 (UTC) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/simple; d=linuxfoundation.org; s=korg; t=1626070618; bh=ckir8RldbnMAvlDvA4IMDq+PDg7k94QnMDElRdgMxng=; h=From:To:Cc:Subject:Date:In-Reply-To:References:From; b=vDdRnx4ddAdcb8+IUkZjtitC51/cHzL3t0CMMITfQtvDfapT6e7Q0SBqiG6QtOsLx x3koeEA6qJe4jXxOcJHVp2b8F5d5NzTs8Ql44y0FqrLuN3qOo2TmHIkdZzmeBFJSlb aVuxcSPtkpVszB/r87zwNL/EGANd4FCWUOcCSLDc= 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 5.4 065/348] media: mdk-mdp: fix pm_runtime_get_sync() usage count Date: Mon, 12 Jul 2021 08:07:29 +0200 Message-Id: <20210712060710.676579394@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 d07bb9702cf5f5ccf3fb661e6cab54bbc33cd23f ] 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, fix the return contition of mtk_mdp_m2m_start_streaming(), as it doesn't make any sense to return 0 if the PM runtime failed to resume. Reviewed-by: Jonathan Cameron Signed-off-by: Mauro Carvalho Chehab Signed-off-by: Sasha Levin --- drivers/media/platform/mtk-mdp/mtk_mdp_m2m.c | 6 +++--- 1 file changed, 3 insertions(+), 3 deletions(-) diff --git a/drivers/media/platform/mtk-mdp/mtk_mdp_m2m.c b/drivers/media/platform/mtk-mdp/mtk_mdp_m2m.c index 7c9e2d69e21a..34bc2949e1d6 100644 --- a/drivers/media/platform/mtk-mdp/mtk_mdp_m2m.c +++ b/drivers/media/platform/mtk-mdp/mtk_mdp_m2m.c @@ -402,12 +402,12 @@ static int mtk_mdp_m2m_start_streaming(struct vb2_queue *q, unsigned int count) struct mtk_mdp_ctx *ctx = q->drv_priv; int ret; - ret = pm_runtime_get_sync(&ctx->mdp_dev->pdev->dev); + ret = pm_runtime_resume_and_get(&ctx->mdp_dev->pdev->dev); if (ret < 0) - mtk_mdp_dbg(1, "[%d] pm_runtime_get_sync failed:%d", + mtk_mdp_dbg(1, "[%d] pm_runtime_resume_and_get failed:%d", ctx->id, ret); - return 0; + return ret; } static void *mtk_mdp_m2m_buf_remove(struct mtk_mdp_ctx *ctx,