From nobody Mon Apr 6 15:42:22 2026 Received: from mailgw.kylinos.cn (mailgw.kylinos.cn [124.126.103.232]) (using TLSv1.2 with cipher ECDHE-RSA-AES256-GCM-SHA384 (256/256 bits)) (No client certificate requested) by smtp.subspace.kernel.org (Postfix) with ESMTPS id 84A8B3B8D55; Thu, 19 Mar 2026 09:17:29 +0000 (UTC) Authentication-Results: smtp.subspace.kernel.org; arc=none smtp.client-ip=124.126.103.232 ARC-Seal: i=1; a=rsa-sha256; d=subspace.kernel.org; s=arc-20240116; t=1773911851; cv=none; b=llbX80gx0eUdR3ku2cIa4t7vw8CSZgBZpAmC9a145rCHVHUUPLgQpJZDLSV9/nmRa7HnexRfCQb3sW+MR2AWYj+69nEf+MsGmmt9hn2b9JKqMRHi2+MemWGT2C/QlG7y+nuR/oeYGMUJPXFlXqxNMZSBwuW/b5AoEaZew5SYEec= ARC-Message-Signature: i=1; a=rsa-sha256; d=subspace.kernel.org; s=arc-20240116; t=1773911851; c=relaxed/simple; bh=1yT3lSlM6pAAQCAVRHAZbp80PA6zTvdaA26h/rSurHk=; h=From:To:Cc:Subject:Date:Message-Id:In-Reply-To:References: MIME-Version; b=PU/WxYi7tkyWQO91yCvW9JYzuUnSPXWLty/Loo7m//R55Eu1ianvGlC7kT3FbykD9O9tQlcJoBxuT2k5iKvJ/CgoR3vJ0FTMbDFwEQsgNaAV8UZHaCShg2zmv5qQVvOGp0oxVTq23mS5XFutbO1ZuTNEThb8gV9mMZTZ8p5WMmY= ARC-Authentication-Results: i=1; smtp.subspace.kernel.org; dmarc=none (p=none dis=none) header.from=kylinos.cn; spf=pass smtp.mailfrom=kylinos.cn; arc=none smtp.client-ip=124.126.103.232 Authentication-Results: smtp.subspace.kernel.org; dmarc=none (p=none dis=none) header.from=kylinos.cn Authentication-Results: smtp.subspace.kernel.org; spf=pass smtp.mailfrom=kylinos.cn X-UUID: 7049782a237411f1a21c59e7364eecb8-20260319 X-CTIC-Tags: HR_CC_COUNT, HR_CC_DOMAIN_COUNT, HR_CC_NAME, HR_CC_NO_NAME, HR_CTE_8B HR_CTT_MISS, HR_DATE_H, HR_DATE_WKD, HR_DATE_ZONE, HR_FROM_NAME HR_SJ_DIGIT_LEN, HR_SJ_LANG, HR_SJ_LEN, HR_SJ_LETTER, HR_SJ_NOR_SYM HR_SJ_PHRASE, HR_SJ_PHRASE_LEN, HR_SJ_WS, HR_TO_COUNT, HR_TO_DOMAIN_COUNT HR_TO_NO_NAME, IP_UNTRUSTED, SRC_UNTRUSTED, IP_UNFAMILIAR, SRC_UNFAMILIAR DN_TRUSTED, SRC_TRUSTED, SA_TRUSTED, SA_EXISTED, SN_TRUSTED SN_EXISTED, SPF_NOPASS, DKIM_NOPASS, DMARC_NOPASS, CIE_GOOD_SPF CIE_UNKNOWN, GTI_FG_BS, GTI_RG_INFO, GTI_C_BU, AMN_GOOD ABX_MISS_RDNS X-CID-P-RULE: Release_Ham X-CID-O-INFO: VERSION:1.3.11,REQID:cb0db077-dad8-4715-ab0f-67fee49567be,IP:10, URL:0,TC:0,Content:0,EDM:-20,RT:0,SF:-5,FILE:0,BULK:0,RULE:Release_Ham,ACT ION:release,TS:-15 X-CID-INFO: VERSION:1.3.11,REQID:cb0db077-dad8-4715-ab0f-67fee49567be,IP:10,UR L:0,TC:0,Content:0,EDM:-20,RT:0,SF:-5,FILE:0,BULK:0,RULE:EDM_GE969F26,ACTI ON:release,TS:-15 X-CID-META: VersionHash:89c9d04,CLOUDID:9aeb2e59c72a43aef4d1b20a2dc4b566,BulkI D:2603091955003MUJSQHW,BulkQuantity:1,Recheck:0,SF:17|19|38|66|78|81|82|10 2|127|850|898,TC:nil,Content:0|15|50,EDM:1,IP:-2,URL:0,File:nil,RT:nil,Bul k:41,QS:nil,BEC:nil,COL:0,OSI:0,OSA:0,AV:0,LES:1,SPR:NO,DKR:0,DKP:0,BRR:0, BRE:0,ARC:0 X-CID-BVR: 2,SSN|SDN X-CID-BAS: 2,SSN|SDN,0,_ X-CID-FACTOR: TF_CID_SPAM_FSD,TF_CID_SPAM_SNR,TF_CID_SPAM_AEC,TF_CID_SPAM_FAS X-CID-RHF: D41D8CD98F00B204E9800998ECF8427E X-UUID: 7049782a237411f1a21c59e7364eecb8-20260319 X-User: tianyaxiong@kylinos.cn Received: from localhost.localdomain [(175.2.81.164)] by mailgw.kylinos.cn (envelope-from ) (Generic MTA) with ESMTP id 205671121; Thu, 19 Mar 2026 17:17:23 +0800 From: Yaxiong Tian To: myungjoo.ham@samsung.com, kyungmin.park@samsung.com, cw00.choi@samsung.com, nm@ti.com Cc: linux-pm@vger.kernel.org, linux-kernel@vger.kernel.org, Yaxiong Tian Subject: [PATCH RESEND 4/4] PM / devfreq: Optimize error return value of governor_show() Date: Thu, 19 Mar 2026 17:17:19 +0800 Message-Id: <20260319091719.1007244-1-tianyaxiong@kylinos.cn> X-Mailer: git-send-email 2.25.1 In-Reply-To: <20260319091409.998397-1-tianyaxiong@kylinos.cn> References: <20260319091409.998397-1-tianyaxiong@kylinos.cn> Precedence: bulk X-Mailing-List: linux-kernel@vger.kernel.org List-Id: List-Subscribe: List-Unsubscribe: MIME-Version: 1.0 Content-Transfer-Encoding: quoted-printable Content-Type: text/plain; charset="utf-8" When df->governor is NULL, governor_show() returns -EINVAL, which confuses users. To fix this issue, return -ENOENT to indicate that no governor is currently set for the device. Signed-off-by: Yaxiong Tian --- drivers/devfreq/devfreq.c | 2 +- 1 file changed, 1 insertion(+), 1 deletion(-) diff --git a/drivers/devfreq/devfreq.c b/drivers/devfreq/devfreq.c index 4a312f3c2421..7cc60711fafd 100644 --- a/drivers/devfreq/devfreq.c +++ b/drivers/devfreq/devfreq.c @@ -1412,7 +1412,7 @@ static ssize_t governor_show(struct device *dev, struct devfreq *df =3D to_devfreq(dev); =20 if (!df->governor) - return -EINVAL; + return -ENOENT; =20 return sprintf(buf, "%s\n", df->governor->name); } --=20 2.25.1