From patchwork Tue Jan 7 20:52:16 2020 Content-Type: text/plain; charset="utf-8" MIME-Version: 1.0 Content-Transfer-Encoding: 7bit X-Patchwork-Submitter: Greg KH X-Patchwork-Id: 234247 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=-9.8 required=3.0 tests=DKIMWL_WL_HIGH, DKIM_SIGNED, DKIM_VALID, HEADER_FROM_DIFFERENT_DOMAINS, INCLUDES_PATCH, MAILING_LIST_MULTI, SIGNED_OFF_BY, SPF_HELO_NONE, SPF_PASS, 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 371D0C33C9E for ; Tue, 7 Jan 2020 21:27:31 +0000 (UTC) Received: from vger.kernel.org (vger.kernel.org [209.132.180.67]) by mail.kernel.org (Postfix) with ESMTP id 0B10C24672 for ; Tue, 7 Jan 2020 21:27:31 +0000 (UTC) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/simple; d=kernel.org; s=default; t=1578432451; bh=Au5h0Tbs2NnhpnJuhUryAGEuji9LYS1kPhAyQd/+xDE=; h=From:To:Cc:Subject:Date:In-Reply-To:References:List-ID:From; b=Pzu+6FM/nkcKRDbeUm4n8R44O9DlP106Bj/utwIVEuTN7FP+4LD1H0N4l144oW6TS PwUOqzWs4cX0jaU+TeMpXH8hTfVF3LiNuTVxA5BW/3sxLJKJrSL/4QZLjcY4SLMIor Dca22OYN7OX7mHmaFY0zn45gmmr1jPjUA9Gurqhw= Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S1727668AbgAGU5n (ORCPT ); Tue, 7 Jan 2020 15:57:43 -0500 Received: from mail.kernel.org ([198.145.29.99]:55380 "EHLO mail.kernel.org" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S1727156AbgAGU5m (ORCPT ); Tue, 7 Jan 2020 15:57:42 -0500 Received: from localhost (83-86-89-107.cable.dynamic.v4.ziggo.nl [83.86.89.107]) (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 B9A0A208C4; Tue, 7 Jan 2020 20:57:41 +0000 (UTC) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/simple; d=kernel.org; s=default; t=1578430662; bh=Au5h0Tbs2NnhpnJuhUryAGEuji9LYS1kPhAyQd/+xDE=; h=From:To:Cc:Subject:Date:In-Reply-To:References:From; b=rHdigWnOyvgKUemLzCPfZFY9AKCteaIk+UDgcEN4PR/E8M8eI4BcIhX+5iyQshL6B tIp/6LKVSoZ5nz417yxuj1aqgmiC7+E6jGnZJJHa21yI8r7lkDgTrMctPLi+lOlNBI IR0lUnt24J1ZalvqEg+shPrdIX+aWLAMetd1C22I= From: Greg Kroah-Hartman To: linux-kernel@vger.kernel.org Cc: Greg Kroah-Hartman , stable@vger.kernel.org, Leonard Crestez , Matthias Kaehlcke , Chanwoo Choi , Sasha Levin Subject: [PATCH 5.4 016/191] PM / devfreq: Fix devfreq_notifier_call returning errno Date: Tue, 7 Jan 2020 21:52:16 +0100 Message-Id: <20200107205333.875490264@linuxfoundation.org> X-Mailer: git-send-email 2.24.1 In-Reply-To: <20200107205332.984228665@linuxfoundation.org> References: <20200107205332.984228665@linuxfoundation.org> User-Agent: quilt/0.66 MIME-Version: 1.0 Sender: stable-owner@vger.kernel.org Precedence: bulk List-ID: X-Mailing-List: stable@vger.kernel.org From: Leonard Crestez [ Upstream commit e876e710ede23f670494331e062d643928e4142a ] Notifier callbacks shouldn't return negative errno but one of the NOTIFY_OK/DONE/BAD values. The OPP core will ignore return values from notifiers but returning a value that matches NOTIFY_STOP_MASK will stop the notification chain. Fix by always returning NOTIFY_OK. Signed-off-by: Leonard Crestez Reviewed-by: Matthias Kaehlcke Reviewed-by: Chanwoo Choi Signed-off-by: Chanwoo Choi Signed-off-by: Sasha Levin --- drivers/devfreq/devfreq.c | 24 +++++++++++++----------- 1 file changed, 13 insertions(+), 11 deletions(-) diff --git a/drivers/devfreq/devfreq.c b/drivers/devfreq/devfreq.c index 3a1484e7a3ae..e5c2afdc7b7f 100644 --- a/drivers/devfreq/devfreq.c +++ b/drivers/devfreq/devfreq.c @@ -551,26 +551,28 @@ static int devfreq_notifier_call(struct notifier_block *nb, unsigned long type, void *devp) { struct devfreq *devfreq = container_of(nb, struct devfreq, nb); - int ret; + int err = -EINVAL; mutex_lock(&devfreq->lock); devfreq->scaling_min_freq = find_available_min_freq(devfreq); - if (!devfreq->scaling_min_freq) { - mutex_unlock(&devfreq->lock); - return -EINVAL; - } + if (!devfreq->scaling_min_freq) + goto out; devfreq->scaling_max_freq = find_available_max_freq(devfreq); - if (!devfreq->scaling_max_freq) { - mutex_unlock(&devfreq->lock); - return -EINVAL; - } + if (!devfreq->scaling_max_freq) + goto out; + + err = update_devfreq(devfreq); - ret = update_devfreq(devfreq); +out: mutex_unlock(&devfreq->lock); + if (err) + dev_err(devfreq->dev.parent, + "failed to update frequency from OPP notifier (%d)\n", + err); - return ret; + return NOTIFY_OK; } /**