Received: by 2002:a05:6a10:8c0a:0:0:0:0 with SMTP id go10csp2538599pxb; Tue, 9 Mar 2021 05:15:05 -0800 (PST) X-Google-Smtp-Source: ABdhPJyYULWHCVHziFqKE1ocsKdqZMmc6njia/K9j+m6SSpBIUYXzx8SfvL88HIeHtosc40pv6wA X-Received: by 2002:a05:6402:35c8:: with SMTP id z8mr4021024edc.341.1615295705654; Tue, 09 Mar 2021 05:15:05 -0800 (PST) ARC-Seal: i=1; a=rsa-sha256; t=1615295705; cv=none; d=google.com; s=arc-20160816; b=Z4KVnurIvx6qixBfvNbMOLzdZR1UJY3Cuob4hKFufSiU36YH/Vr3T9aE+lB6i7P+AZ T02GAvQC6/HRHhsmFZlIz1fHet1YNuU9yxWHszF+DT/nDUho3ja7g4+uTHqNKmk78T6n 5P7XMiaa0xSbyvPPawFah0CIZwgQedrhGoI1rHM2IeGBAYAN+qID4DEPd2CHLKm5sfil fnM08KT+4GEao+F+r/VMVaXYvq7MbPJMY2T+NIYcxzSp/cY19+zWE0J0lLkDu9/REODK cRNEm9b6QWrRVPbs8LOeTJ8YBsEQnv9Vw0H42JUNX9C4LTtUCL7xuoFOjyWIjp7KBnaN jmDQ== ARC-Message-Signature: i=1; a=rsa-sha256; c=relaxed/relaxed; d=google.com; s=arc-20160816; h=list-id:precedence:references:in-reply-to:message-id:date:subject :cc:to:from; bh=ZQD80LITN9vCNtt3usT0ONfG80mes8EkExRJReeddr8=; b=m5bsx/uZAQ05zlqTAa4evmtdIscm3NN3jflj0JFJ4xPat+0DbzvzSlIf8K771aR+Nl pEDfKJuiECmlqJ8U+dHCbu1H8BdXRqQ71Iri+h9etxP9zwE7xHuGl+6SeNviUtmjIta8 LRQML15wWBlbTN4OHxU8lwvgdWX3Am8mztHuJhXQBZDMrpFGOBSoBS9R+5lCJvF8KUzd /K6Hf1Dn7qE8jiIHj/Wn0ST7eq9w3+1ZzPDhhKPFWRWRtH72684Kgxrthj3n8WzusDB4 E85lCOeCbfNRfMXvamzWuOdVCi6NyMbI4NyhxlT+9UlFO7XbIhwfbQQ02t3dmbwxhqC1 3E6w== ARC-Authentication-Results: i=1; mx.google.com; spf=pass (google.com: domain of linux-kernel-owner@vger.kernel.org designates 23.128.96.18 as permitted sender) smtp.mailfrom=linux-kernel-owner@vger.kernel.org; dmarc=fail (p=NONE sp=NONE dis=NONE) header.from=nxp.com Return-Path: Received: from vger.kernel.org (vger.kernel.org. [23.128.96.18]) by mx.google.com with ESMTP id 3si4495034ejz.371.2021.03.09.05.14.40; Tue, 09 Mar 2021 05:15:05 -0800 (PST) Received-SPF: pass (google.com: domain of linux-kernel-owner@vger.kernel.org designates 23.128.96.18 as permitted sender) client-ip=23.128.96.18; Authentication-Results: mx.google.com; spf=pass (google.com: domain of linux-kernel-owner@vger.kernel.org designates 23.128.96.18 as permitted sender) smtp.mailfrom=linux-kernel-owner@vger.kernel.org; dmarc=fail (p=NONE sp=NONE dis=NONE) header.from=nxp.com Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S231423AbhCINNI (ORCPT + 99 others); Tue, 9 Mar 2021 08:13:08 -0500 Received: from inva021.nxp.com ([92.121.34.21]:57892 "EHLO inva021.nxp.com" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S230328AbhCINMf (ORCPT ); Tue, 9 Mar 2021 08:12:35 -0500 Received: from inva021.nxp.com (localhost [127.0.0.1]) by inva021.eu-rdc02.nxp.com (Postfix) with ESMTP id 13BAD200FC9; Tue, 9 Mar 2021 14:12:34 +0100 (CET) Received: from invc005.ap-rdc01.nxp.com (invc005.ap-rdc01.nxp.com [165.114.16.14]) by inva021.eu-rdc02.nxp.com (Postfix) with ESMTP id DE767200FAC; Tue, 9 Mar 2021 14:12:27 +0100 (CET) Received: from localhost.localdomain (shlinux2.ap.freescale.net [10.192.224.44]) by invc005.ap-rdc01.nxp.com (Postfix) with ESMTP id 0CF7740338; Tue, 9 Mar 2021 14:12:16 +0100 (CET) From: Dong Aisheng To: linux-pm@vger.kernel.org, linux-arm-kernel@lists.infradead.org Cc: dongas86@gmail.com, kernel@pengutronix.de, shawnguo@kernel.org, linux-imx@nxp.com, linux-kernel@vger.kernel.org, myungjoo.ham@samsung.com, kyungmin.park@samsung.com, cw00.choi@samsung.com, abel.vesa@nxp.com, Dong Aisheng Subject: [PATCH 08/11] PM / devfreq: check get_dev_status in devfreq_update_stats Date: Tue, 9 Mar 2021 20:58:38 +0800 Message-Id: <1615294733-22761-9-git-send-email-aisheng.dong@nxp.com> X-Mailer: git-send-email 2.7.4 In-Reply-To: <1615294733-22761-1-git-send-email-aisheng.dong@nxp.com> References: <1615294733-22761-1-git-send-email-aisheng.dong@nxp.com> X-Virus-Scanned: ClamAV using ClamSMTP Precedence: bulk List-ID: X-Mailing-List: linux-kernel@vger.kernel.org Check .get_dev_status() in devfreq_update_stats in case it's abused when a device does not provide it. Signed-off-by: Dong Aisheng --- drivers/devfreq/governor.h | 3 +++ 1 file changed, 3 insertions(+) diff --git a/drivers/devfreq/governor.h b/drivers/devfreq/governor.h index 31af6d072a10..67a6dbdd5d23 100644 --- a/drivers/devfreq/governor.h +++ b/drivers/devfreq/governor.h @@ -89,6 +89,9 @@ int devfreq_update_target(struct devfreq *devfreq, unsigned long freq); static inline int devfreq_update_stats(struct devfreq *df) { + if (!df->profile->get_dev_status) + return -EINVAL; + return df->profile->get_dev_status(df->dev.parent, &df->last_status); } #endif /* _GOVERNOR_H */ -- 2.25.1