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=-14.2 required=3.0 tests=BAYES_00,DKIM_SIGNED, DKIM_VALID,DKIM_VALID_AU,FREEMAIL_FORGED_FROMDOMAIN,FREEMAIL_FROM, HEADER_FROM_DIFFERENT_DOMAINS,INCLUDES_CR_TRAILER,INCLUDES_PATCH, MAILING_LIST_MULTI,SPF_HELO_NONE,SPF_PASS,URIBL_BLOCKED,USER_AGENT_SANE_1 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 9B7A4C433E9 for ; Fri, 15 Jan 2021 16:26:58 +0000 (UTC) Received: from vger.kernel.org (vger.kernel.org [23.128.96.18]) by mail.kernel.org (Postfix) with ESMTP id 71531238EE for ; Fri, 15 Jan 2021 16:26:58 +0000 (UTC) Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S1726019AbhAOQ0y (ORCPT ); Fri, 15 Jan 2021 11:26:54 -0500 Received: from lindbergh.monkeyblade.net ([23.128.96.19]:33164 "EHLO lindbergh.monkeyblade.net" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S1725910AbhAOQ0y (ORCPT ); Fri, 15 Jan 2021 11:26:54 -0500 Received: from mail-wr1-x42b.google.com (mail-wr1-x42b.google.com [IPv6:2a00:1450:4864:20::42b]) by lindbergh.monkeyblade.net (Postfix) with ESMTPS id D128AC0613C1; Fri, 15 Jan 2021 08:26:13 -0800 (PST) Received: by mail-wr1-x42b.google.com with SMTP id d26so9853420wrb.12; Fri, 15 Jan 2021 08:26:13 -0800 (PST) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=gmail.com; s=20161025; h=date:from:to:cc:subject:message-id:references:mime-version :content-disposition:in-reply-to:user-agent; bh=nWLmc3yR2tv/EqCP45DZyypeULeeDqAZ/zy0X3SdJ5s=; b=QJB/43JqyTc1Gi68NiR+A3I1qp5KyVQrvM5MJJ/0u86ADDxhG/NCpLGJmGDzakounI Xc3fNEifdzB4tW1iLbNNB+lDEqTGiB3zKVmDOdR/k/L0SxymPeckR2twJicjdJ1Bir+2 WItkF9dN3RRo9cgne1PedOxpOJNrOahbVg4kKKut9GJwpQU+UsIQBCnmcMd/sRzdEJ1Y xhcW+Vn5zsgasBELDibw9FLPFHM7qSddwBPsL6bMnJC+HS0/mhWCLkeA2Ua5wiemxKdQ +Fv5D7GKK2pCHHgtTyl4D/MLWqWbnjMpoKHviF86d6H3YVaoVnYMGFN0JwPP9SOOxF/V 7c0Q== X-Google-DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=1e100.net; s=20161025; h=x-gm-message-state:date:from:to:cc:subject:message-id:references :mime-version:content-disposition:in-reply-to:user-agent; bh=nWLmc3yR2tv/EqCP45DZyypeULeeDqAZ/zy0X3SdJ5s=; b=OUm70Yueaaqw+GQkOVq6MqeN6ejBeXW05andau4yLxWVP3IfErsCTQhpcHmRWfR4r8 Ihw2N3tNrlmaRW8irj9JIncYbrjb+1gil7SUlhIK4dvJRWTVTZvOGvcDKsWwR90oIjyj Rdk3Hptm+LFazGKw6RRaPJmXnqJWyH3fe4e/t3Ldbe7t9cFZcfQXDFM0LQEOVXfH9BWA jGV1+ZSECxLZWtjfh+rs9nTJQAj6jsLCOV189hpw1NOWOuyHuK50rcaeLUDzgfvFm5ob UxnlrmKewyiLOj5me7RdBygpaOXq2UQYA1VxPfhg3viuDk/ZxXKTU/n67omiLoEDz2jP DZaQ== X-Gm-Message-State: AOAM5307cTG8agZv1TzGcblrU60/im3k8VVXeCa39XUgVgKGYcBlaJMJ /lk/EFdv/HloV2UVBDTZrz4Tq7+lO+8= X-Google-Smtp-Source: ABdhPJxh8Z+P44Wu1c7fkR9xWwjvx8qEckdtWrwy9Mu4uUNFcydekCsOgd9NCGDZ2vrbTt++pa2J+w== X-Received: by 2002:adf:f6c9:: with SMTP id y9mr14160847wrp.121.1610727972657; Fri, 15 Jan 2021 08:26:12 -0800 (PST) Received: from localhost ([62.96.65.119]) by smtp.gmail.com with ESMTPSA id v20sm12822294wml.34.2021.01.15.08.26.10 (version=TLS1_3 cipher=TLS_AES_256_GCM_SHA384 bits=256/256); Fri, 15 Jan 2021 08:26:11 -0800 (PST) Date: Fri, 15 Jan 2021 17:26:10 +0100 From: Thierry Reding To: Qinglang Miao Cc: David Airlie , Daniel Vetter , Jonathan Hunter , dri-devel@lists.freedesktop.org, linux-tegra@vger.kernel.org, linux-kernel@vger.kernel.org Subject: Re: [PATCH] drm/tegra: fix reference leak when pm_runtime_get_sync fails Message-ID: References: <20201201125631.142590-1-miaoqinglang@huawei.com> MIME-Version: 1.0 Content-Type: multipart/signed; micalg=pgp-sha256; protocol="application/pgp-signature"; boundary="mXEwpiDczBzJuSir" Content-Disposition: inline In-Reply-To: <20201201125631.142590-1-miaoqinglang@huawei.com> User-Agent: Mutt/2.0.4 (26f41dd1) (2020-12-30) Precedence: bulk List-ID: X-Mailing-List: linux-tegra@vger.kernel.org --mXEwpiDczBzJuSir Content-Type: text/plain; charset=us-ascii Content-Disposition: inline Content-Transfer-Encoding: quoted-printable On Tue, Dec 01, 2020 at 08:56:31PM +0800, Qinglang Miao wrote: > The PM reference count is not expected to be incremented on > return in these tegra functions. >=20 > However, pm_runtime_get_sync will increment the PM reference > count even failed. Forgetting to putting operation will result > in a reference leak here. >=20 > Replace it with pm_runtime_resume_and_get to keep usage > counter balanced. >=20 > Fixes: fd67e9c6ed5a ("drm/tegra: Do not implement runtime PM") > Reported-by: Hulk Robot > Signed-off-by: Qinglang Miao > --- > drivers/gpu/drm/tegra/dc.c | 2 +- > drivers/gpu/drm/tegra/dsi.c | 2 +- > drivers/gpu/drm/tegra/hdmi.c | 2 +- > drivers/gpu/drm/tegra/hub.c | 2 +- > drivers/gpu/drm/tegra/sor.c | 2 +- > drivers/gpu/drm/tegra/vic.c | 2 +- > 6 files changed, 6 insertions(+), 6 deletions(-) Applied, thanks. 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