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=-4.0 required=3.0 tests=HEADER_FROM_DIFFERENT_DOMAINS, MAILING_LIST_MULTI,SPF_HELO_NONE,SPF_PASS,UNPARSEABLE_RELAY,USER_AGENT_GIT autolearn=no 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 E2E90C5ACAE for ; Wed, 11 Sep 2019 09:41:44 +0000 (UTC) Received: from vger.kernel.org (vger.kernel.org [209.132.180.67]) by mail.kernel.org (Postfix) with ESMTP id B4D472067B for ; Wed, 11 Sep 2019 09:41:44 +0000 (UTC) Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S1727224AbfIKJlo (ORCPT ); Wed, 11 Sep 2019 05:41:44 -0400 Received: from mailgw01.mediatek.com ([210.61.82.183]:48084 "EHLO mailgw01.mediatek.com" rhost-flags-OK-FAIL-OK-FAIL) by vger.kernel.org with ESMTP id S1727079AbfIKJlo (ORCPT ); Wed, 11 Sep 2019 05:41:44 -0400 X-UUID: f75b2f38a59f4dbc856ea574a29322bc-20190911 X-UUID: f75b2f38a59f4dbc856ea574a29322bc-20190911 Received: from mtkcas07.mediatek.inc [(172.21.101.84)] by mailgw01.mediatek.com (envelope-from ) (Cellopoint E-mail Firewall v4.1.10 Build 0809 with TLS) with ESMTP id 962385950; Wed, 11 Sep 2019 17:41:39 +0800 Received: from mtkcas09.mediatek.inc (172.21.101.178) by mtkmbs01n2.mediatek.inc (172.21.101.79) with Microsoft SMTP Server (TLS) id 15.0.1395.4; Wed, 11 Sep 2019 17:41:31 +0800 Received: from mtkswgap22.mediatek.inc (172.21.77.33) by mtkcas09.mediatek.inc (172.21.101.73) with Microsoft SMTP Server id 15.0.1395.4 via Frontend Transport; Wed, 11 Sep 2019 17:41:31 +0800 From: Stanley Chu To: , , , , , , , CC: , , , , , , , , , , , , Stanley Chu Subject: [PATCH v1] scsi: allow auto suspend override by low-level driver Date: Wed, 11 Sep 2019 17:41:27 +0800 Message-ID: <1568194890-24439-1-git-send-email-stanley.chu@mediatek.com> X-Mailer: git-send-email 1.7.9.5 MIME-Version: 1.0 Content-Type: text/plain X-TM-SNTS-SMTP: 553B7F30E90D0E6BCB4321C34F4944BCF487C5F0D2B7AA40AFB71F9F507E92932000:8 X-MTK: N Sender: linux-scsi-owner@vger.kernel.org Precedence: bulk List-ID: X-Mailing-List: linux-scsi@vger.kernel.org Until now the scsi mid-layer forbids runtime suspend till userspace enables it. This is mainly to quarantine some disks with broken runtime power management or have high latencies executing suspend resume callbacks. If the userspace doesn't enable the runtime suspend the underlying hardware will be always on even when it is not doing any useful work and thus wasting power. Some low-level drivers for the controllers can efficiently use runtime power management to reduce power consumption and improve battery life. This patchset allows runtime suspend parameters override within the LLD itself instead of waiting for userspace to control the power management, and make UFS as the first user of this capability. Stanley Chu (3): scsi: core: allow auto suspend override by low-level driver scsi: ufs: override auto suspend tunables for ufs scsi: ufs-mediatek: enable auto suspend capability drivers/scsi/scsi_sysfs.c | 3 ++- drivers/scsi/sd.c | 3 +++ drivers/scsi/ufs/ufs-mediatek.c | 7 +++++++ drivers/scsi/ufs/ufshcd.c | 8 ++++++++ drivers/scsi/ufs/ufshcd.h | 10 ++++++++++ include/scsi/scsi_device.h | 2 +- 6 files changed, 31 insertions(+), 2 deletions(-) -- 2.18.0