From patchwork Tue Oct 27 13:54:33 2020 Content-Type: text/plain; charset="utf-8" MIME-Version: 1.0 Content-Transfer-Encoding: 7bit X-Patchwork-Submitter: Greg KH X-Patchwork-Id: 312862 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=-12.8 required=3.0 tests=BAYES_00,DKIMWL_WL_HIGH, DKIM_SIGNED, DKIM_VALID, HEADER_FROM_DIFFERENT_DOMAINS, INCLUDES_PATCH, MAILING_LIST_MULTI, SIGNED_OFF_BY, 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 8F8A0C55178 for ; Tue, 27 Oct 2020 14:43:56 +0000 (UTC) Received: from vger.kernel.org (vger.kernel.org [23.128.96.18]) by mail.kernel.org (Postfix) with ESMTP id 40B0921527 for ; Tue, 27 Oct 2020 14:43:56 +0000 (UTC) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/simple; d=kernel.org; s=default; t=1603809836; bh=0w6BHfgMrYO94w2zhJG9aBTMWbnKGy674ULRy3rSaVY=; h=From:To:Cc:Subject:Date:In-Reply-To:References:List-ID:From; b=r4TtSpocVijD7skzV3ZYPx7+7XsdnGByVEoSkPw+tfSgDxBY/y7f/K5uP8SHviYIn HJ+bii+Pm27fIguZcXeMzguD3eA/Bh8+Y3RikICHe9eoWSA/htmKp/HNNY8nzAA/HS hfbe0z64bYSYFrYQLIrE42sx29YGR1pjVt9mViQY= Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S1762655AbgJ0Ony (ORCPT ); Tue, 27 Oct 2020 10:43:54 -0400 Received: from mail.kernel.org ([198.145.29.99]:43742 "EHLO mail.kernel.org" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S2899694AbgJ0Onx (ORCPT ); Tue, 27 Oct 2020 10:43:53 -0400 Received: from localhost (83-86-74-64.cable.dynamic.v4.ziggo.nl [83.86.74.64]) (using TLSv1.2 with cipher ECDHE-RSA-AES256-GCM-SHA384 (256/256 bits)) (No client certificate requested) by mail.kernel.org (Postfix) with ESMTPSA id DA3A9206E5; Tue, 27 Oct 2020 14:43:52 +0000 (UTC) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/simple; d=kernel.org; s=default; t=1603809833; bh=0w6BHfgMrYO94w2zhJG9aBTMWbnKGy674ULRy3rSaVY=; h=From:To:Cc:Subject:Date:In-Reply-To:References:From; b=uNv5ETPFiXO/sbPNxxkidvNMobPtALymZ19kl86yWKoKcJweUwk0H9ZaVQKGLnaev UKEvb9y3biiqoUl4yBYhOep8Y8B+hadcfsksHiM7baWy66+WsLleElGMhBofSC1NBm 2OF0g/Nu/+o8FT5ybB2gPQ2gNYbtoNSuwyzDr/fo= From: Greg Kroah-Hartman To: linux-kernel@vger.kernel.org Cc: Greg Kroah-Hartman , stable@vger.kernel.org, Qiushi Wu , Hans Verkuil , Mauro Carvalho Chehab , Sasha Levin Subject: [PATCH 5.4 335/408] media: exynos4-is: Fix a reference count leak Date: Tue, 27 Oct 2020 14:54:33 +0100 Message-Id: <20201027135510.579752148@linuxfoundation.org> X-Mailer: git-send-email 2.29.1 In-Reply-To: <20201027135455.027547757@linuxfoundation.org> References: <20201027135455.027547757@linuxfoundation.org> User-Agent: quilt/0.66 MIME-Version: 1.0 Precedence: bulk List-ID: X-Mailing-List: stable@vger.kernel.org From: Qiushi Wu [ Upstream commit 64157b2cb1940449e7df2670e85781c690266588 ] pm_runtime_get_sync() increments the runtime PM usage counter even when it returns an error code, causing incorrect ref count if pm_runtime_put_noidle() is not called in error handling paths. Thus call pm_runtime_put_noidle() if pm_runtime_get_sync() fails. Signed-off-by: Qiushi Wu Signed-off-by: Hans Verkuil Signed-off-by: Mauro Carvalho Chehab Signed-off-by: Sasha Levin --- drivers/media/platform/exynos4-is/mipi-csis.c | 4 +++- 1 file changed, 3 insertions(+), 1 deletion(-) diff --git a/drivers/media/platform/exynos4-is/mipi-csis.c b/drivers/media/platform/exynos4-is/mipi-csis.c index 540151bbf58f2..1aac167abb175 100644 --- a/drivers/media/platform/exynos4-is/mipi-csis.c +++ b/drivers/media/platform/exynos4-is/mipi-csis.c @@ -510,8 +510,10 @@ static int s5pcsis_s_stream(struct v4l2_subdev *sd, int enable) if (enable) { s5pcsis_clear_counters(state); ret = pm_runtime_get_sync(&state->pdev->dev); - if (ret && ret != 1) + if (ret && ret != 1) { + pm_runtime_put_noidle(&state->pdev->dev); return ret; + } } mutex_lock(&state->lock);