From patchwork Tue Aug 1 13:34:58 2023 Content-Type: text/plain; charset="utf-8" MIME-Version: 1.0 Content-Transfer-Encoding: 7bit X-Patchwork-Submitter: =?utf-8?b?UGV0ZXIgV2FuZyAo546L5L+h5Y+LKQ==?= X-Patchwork-Id: 13336722 Return-Path: X-Spam-Checker-Version: SpamAssassin 3.4.0 (2014-02-07) on aws-us-west-2-korg-lkml-1.web.codeaurora.org Received: from vger.kernel.org (vger.kernel.org [23.128.96.18]) by smtp.lore.kernel.org (Postfix) with ESMTP id 3D10CC001DF for ; Tue, 1 Aug 2023 13:35:28 +0000 (UTC) Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S231888AbjHANf1 (ORCPT ); Tue, 1 Aug 2023 09:35:27 -0400 Received: from lindbergh.monkeyblade.net ([23.128.96.19]:43748 "EHLO lindbergh.monkeyblade.net" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S233875AbjHANfW (ORCPT ); Tue, 1 Aug 2023 09:35:22 -0400 Received: from mailgw01.mediatek.com (unknown [60.244.123.138]) by lindbergh.monkeyblade.net (Postfix) with ESMTPS id 168712682; Tue, 1 Aug 2023 06:35:08 -0700 (PDT) X-UUID: 375e882e307011ee9cb5633481061a41-20230801 DKIM-Signature: v=1; a=rsa-sha256; q=dns/txt; c=relaxed/relaxed; d=mediatek.com; s=dk; h=Content-Type:MIME-Version:Message-ID:Date:Subject:CC:To:From; bh=HdazcTEFCseLReVrm5lXfmcb+hE9liItZpU9OIkKkLY=; b=Ufz8fynCRqheSWmI7zCoK65wlYVOgb7Efl/xf2f/0klqMveUkFfNfzCAh2C0lFAl0PvLkOLpD4fmNX3muiSitgvv9i59uKdVEERS1ce8sgr7M7QAv4i8nZVn3yc3P9ENYXXQbLaTuqUT9f2Ux9KG92iqNsVYkfiaJ9a/Q/2itkM=; X-CID-P-RULE: Release_Ham X-CID-O-INFO: VERSION:1.1.30,REQID:4864c661-14ff-4b7d-bdf0-ef71661f82e5,IP:0,U RL:0,TC:0,Content:-5,EDM:0,RT:0,SF:0,FILE:0,BULK:0,RULE:Release_Ham,ACTION :release,TS:-5 X-CID-META: VersionHash:1fcc6f8,CLOUDID:b63791d2-cd77-4e67-bbfd-aa4eaace762f,B ulkID:nil,BulkQuantity:0,Recheck:0,SF:102,TC:nil,Content:0,EDM:-3,IP:nil,U RL:11|1,File:nil,Bulk:nil,QS:nil,BEC:nil,COL:0,OSI:0,OSA:0,AV:0,LES:1,SPR: NO,DKR:0,DKP:0,BRR:0,BRE:0 X-CID-BVR: 0 X-CID-BAS: 0,_,0,_ X-CID-FACTOR: TF_CID_SPAM_SNR,TF_CID_SPAM_ULN X-UUID: 375e882e307011ee9cb5633481061a41-20230801 Received: from mtkmbs10n2.mediatek.inc [(172.21.101.183)] by mailgw01.mediatek.com (envelope-from ) (Generic MTA with TLSv1.2 ECDHE-RSA-AES256-GCM-SHA384 256/256) with ESMTP id 1669052372; Tue, 01 Aug 2023 21:35:01 +0800 Received: from mtkmbs11n2.mediatek.inc (172.21.101.187) by mtkmbs10n2.mediatek.inc (172.21.101.183) with Microsoft SMTP Server (version=TLS1_2, cipher=TLS_ECDHE_RSA_WITH_AES_256_GCM_SHA384) id 15.2.1118.26; Tue, 1 Aug 2023 21:35:00 +0800 Received: from mtksdccf07.mediatek.inc (172.21.84.99) by mtkmbs11n2.mediatek.inc (172.21.101.73) with Microsoft SMTP Server id 15.2.1118.26 via Frontend Transport; Tue, 1 Aug 2023 21:35:00 +0800 From: To: , , , , , CC: , , , , , , , , , , , , , , Subject: [PATCH v1] ufs: core: only suspend clock scaling if scale down Date: Tue, 1 Aug 2023 21:34:58 +0800 Message-ID: <20230801133458.6837-1-peter.wang@mediatek.com> X-Mailer: git-send-email 2.18.0 MIME-Version: 1.0 X-MTK: N Precedence: bulk List-ID: X-Mailing-List: linux-scsi@vger.kernel.org From: Peter Wang If clock scale up and suspend clock scaling, ufs will keep high performance/power mode but no read/write requests on going. It is logic wrong and have power concern. Fixes: 401f1e4490ee ("scsi: ufs: don't suspend clock scaling during clock gating") Cc: Signed-off-by: Peter Wang Reviewed-by: Bart Van Assche --- drivers/ufs/core/ufshcd.c | 2 +- 1 file changed, 1 insertion(+), 1 deletion(-) diff --git a/drivers/ufs/core/ufshcd.c b/drivers/ufs/core/ufshcd.c index 129446775796..e3672e55efae 100644 --- a/drivers/ufs/core/ufshcd.c +++ b/drivers/ufs/core/ufshcd.c @@ -1458,7 +1458,7 @@ static int ufshcd_devfreq_target(struct device *dev, ktime_to_us(ktime_sub(ktime_get(), start)), ret); out: - if (sched_clk_scaling_suspend_work) + if (sched_clk_scaling_suspend_work && !scale_up) queue_work(hba->clk_scaling.workq, &hba->clk_scaling.suspend_work);