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=-20.4 required=3.0 tests=BAYES_00,DKIMWL_WL_HIGH, DKIM_SIGNED,DKIM_VALID,DKIM_VALID_AU,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 89AE4C07E9B for ; Tue, 6 Jul 2021 12:20:15 +0000 (UTC) Received: from vger.kernel.org (vger.kernel.org [23.128.96.18]) by mail.kernel.org (Postfix) with ESMTP id 752D461447 for ; Tue, 6 Jul 2021 12:20:15 +0000 (UTC) Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S1343772AbhGFMVI (ORCPT ); Tue, 6 Jul 2021 08:21:08 -0400 Received: from mail.kernel.org ([198.145.29.99]:47548 "EHLO mail.kernel.org" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S237105AbhGFLfy (ORCPT ); Tue, 6 Jul 2021 07:35:54 -0400 Received: by mail.kernel.org (Postfix) with ESMTPSA id 683E861EAB; Tue, 6 Jul 2021 11:25:30 +0000 (UTC) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/simple; d=kernel.org; s=k20201202; t=1625570731; bh=ZP1acyJ8uDVnQc1RK57kx3rIAh4r8Qwak6pgb9sNWd8=; h=From:To:Cc:Subject:Date:In-Reply-To:References:From; b=sGCS3iPRGJkzusBlNYKfTodlBukjUSUmmh9ZNiI/iWflpIvmJAafgJPEgQu+CWChf NlvT6YiaLr2V9gCtb4m6gW6eqagGaZDY+S1cBH/QF9wbII3P6voFPlX+AwihgXaBdG PVRXJCozXcBHCSLEnjERVkyZYZsBcW3KCwoAchi6kuxR/dfXrpwO2gvfkqg6qCHhVh 3iYG5rOjYo3sgvh3DjC0BPM4iUEyE5/eDGgQhDqZIx8nAQ0G9SoMbistJNrtKA8toA E/BUFNUyb9hwym9hxElBF2isbqw7G6VuzL0jmyko0bbT8vivLe9JuEJerDT4OttMGU C4l0189hVdDjA== From: Sasha Levin To: linux-kernel@vger.kernel.org, stable@vger.kernel.org Cc: Zou Wei , Hulk Robot , Robert Foss , Sasha Levin , dri-devel@lists.freedesktop.org Subject: [PATCH AUTOSEL 5.4 22/74] drm/bridge: cdns: Fix PM reference leak in cdns_dsi_transfer() Date: Tue, 6 Jul 2021 07:24:10 -0400 Message-Id: <20210706112502.2064236-22-sashal@kernel.org> X-Mailer: git-send-email 2.30.2 In-Reply-To: <20210706112502.2064236-1-sashal@kernel.org> References: <20210706112502.2064236-1-sashal@kernel.org> MIME-Version: 1.0 X-stable: review X-Patchwork-Hint: Ignore Content-Transfer-Encoding: 8bit Precedence: bulk List-ID: X-Mailing-List: linux-kernel@vger.kernel.org From: Zou Wei [ Upstream commit 33f90f27e1c5ccd648d3e78a1c28be9ee8791cf1 ] pm_runtime_get_sync will increment pm usage counter even it failed. Forgetting to putting operation will result in reference leak here. Fix it by replacing it with pm_runtime_resume_and_get to keep usage counter balanced. Reported-by: Hulk Robot Signed-off-by: Zou Wei Reviewed-by: Robert Foss Signed-off-by: Robert Foss Link: https://patchwork.freedesktop.org/patch/msgid/1621840862-106024-1-git-send-email-zou_wei@huawei.com Signed-off-by: Sasha Levin --- drivers/gpu/drm/bridge/cdns-dsi.c | 2 +- 1 file changed, 1 insertion(+), 1 deletion(-) diff --git a/drivers/gpu/drm/bridge/cdns-dsi.c b/drivers/gpu/drm/bridge/cdns-dsi.c index 6166dca6be81..0cb9dd6986ec 100644 --- a/drivers/gpu/drm/bridge/cdns-dsi.c +++ b/drivers/gpu/drm/bridge/cdns-dsi.c @@ -1026,7 +1026,7 @@ static ssize_t cdns_dsi_transfer(struct mipi_dsi_host *host, struct mipi_dsi_packet packet; int ret, i, tx_len, rx_len; - ret = pm_runtime_get_sync(host->dev); + ret = pm_runtime_resume_and_get(host->dev); if (ret < 0) return ret; -- 2.30.2