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=-3.8 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 F039DC49ED7 for ; Mon, 16 Sep 2019 15:57:00 +0000 (UTC) Received: from vger.kernel.org (vger.kernel.org [209.132.180.67]) by mail.kernel.org (Postfix) with ESMTP id D0BA3214DE for ; Mon, 16 Sep 2019 15:57:00 +0000 (UTC) Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S1731320AbfIPP5A (ORCPT ); Mon, 16 Sep 2019 11:57:00 -0400 Received: from mailgw01.mediatek.com ([210.61.82.183]:10129 "EHLO mailgw01.mediatek.com" rhost-flags-OK-FAIL-OK-FAIL) by vger.kernel.org with ESMTP id S1730026AbfIPP5A (ORCPT ); Mon, 16 Sep 2019 11:57:00 -0400 X-UUID: fe07b6b160f148a5beca88715ba8ec04-20190916 X-UUID: fe07b6b160f148a5beca88715ba8ec04-20190916 Received: from mtkcas06.mediatek.inc [(172.21.101.30)] by mailgw01.mediatek.com (envelope-from ) (Cellopoint E-mail Firewall v4.1.10 Build 0809 with TLS) with ESMTP id 1024302266; Mon, 16 Sep 2019 23:56:53 +0800 Received: from mtkcas08.mediatek.inc (172.21.101.126) by mtkmbs07n2.mediatek.inc (172.21.101.141) with Microsoft SMTP Server (TLS) id 15.0.1395.4; Mon, 16 Sep 2019 23:56:52 +0800 Received: from mtkswgap22.mediatek.inc (172.21.77.33) by mtkcas08.mediatek.inc (172.21.101.73) with Microsoft SMTP Server id 15.0.1395.4 via Frontend Transport; Mon, 16 Sep 2019 23:56:51 +0800 From: Stanley Chu To: , , , , , , , CC: , , , , , , , , , , , , , Stanley Chu Subject: [PATCH v4 0/3] scsi: core: allow auto suspend override by low-level driver Date: Mon, 16 Sep 2019 23:56:48 +0800 Message-ID: <1568649411-5127-1-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-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. v3 => v4: - Change scsi_device->rpm_autosuspend_on to scsi_device->rpm_autosuspend (Bart) - Make the comment of scsi_device->rpm_autosuspend more elaborate (Bart) v2 => v3: - Create a member indicating autosuspend delay for the same SCSI host in SCSI host template (Bart) - Use separate variables to control different things, (Bart) (a) Whether or not runtime suspend is enabled at device creation time (b) The power management autosuspend delay v1 => v2: - Allow "zero" sdev->rpm_autosuspend_delay (Avri) - Fix format of some lines (Avri) 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 | 4 ++++ drivers/scsi/ufs/ufs-mediatek.c | 3 +++ drivers/scsi/ufs/ufshcd.c | 9 +++++++++ drivers/scsi/ufs/ufshcd.h | 10 ++++++++++ include/scsi/scsi_device.h | 3 ++- include/scsi/scsi_host.h | 3 +++ 7 files changed, 33 insertions(+), 2 deletions(-) -- 2.18.0