From patchwork Sun Mar 6 11:55:54 2016 Content-Type: text/plain; charset="utf-8" MIME-Version: 1.0 Content-Transfer-Encoding: 7bit X-Patchwork-Submitter: Yaniv Gardi X-Patchwork-Id: 8512781 Return-Path: X-Original-To: patchwork-linux-arm-msm@patchwork.kernel.org Delivered-To: patchwork-parsemail@patchwork1.web.kernel.org Received: from mail.kernel.org (mail.kernel.org [198.145.29.136]) by patchwork1.web.kernel.org (Postfix) with ESMTP id 6313D9FC5C for ; Sun, 6 Mar 2016 11:57:14 +0000 (UTC) Received: from mail.kernel.org (localhost [127.0.0.1]) by mail.kernel.org (Postfix) with ESMTP id 881E920172 for ; Sun, 6 Mar 2016 11:57:13 +0000 (UTC) Received: from vger.kernel.org (vger.kernel.org [209.132.180.67]) by mail.kernel.org (Postfix) with ESMTP id A7DDA2012D for ; Sun, 6 Mar 2016 11:57:12 +0000 (UTC) Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S1751676AbcCFL5C (ORCPT ); Sun, 6 Mar 2016 06:57:02 -0500 Received: from smtp.codeaurora.org ([198.145.29.96]:33631 "EHLO smtp.codeaurora.org" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S1751621AbcCFL4x (ORCPT ); Sun, 6 Mar 2016 06:56:53 -0500 Received: from smtp.codeaurora.org (localhost [127.0.0.1]) by smtp.codeaurora.org (Postfix) with ESMTP id 7B30860DF3; Sun, 6 Mar 2016 11:56:52 +0000 (UTC) Received: by smtp.codeaurora.org (Postfix, from userid 1000) id 6D5DE60DF2; Sun, 6 Mar 2016 11:56:52 +0000 (UTC) X-Spam-Checker-Version: SpamAssassin 3.3.1 (2010-03-16) on mail.kernel.org X-Spam-Level: X-Spam-Status: No, score=-6.9 required=5.0 tests=BAYES_00, RCVD_IN_DNSWL_HI, RP_MATCHES_RCVD, UNPARSEABLE_RELAY autolearn=ham version=3.3.1 Received: from lx-ygardi.mea.qualcomm.com (unknown [185.23.60.4]) (using TLSv1.1 with cipher ECDHE-RSA-AES256-SHA (256/256 bits)) (No client certificate requested) (Authenticated sender: ygardi@smtp.codeaurora.org) by smtp.codeaurora.org (Postfix) with ESMTPSA id 6DF5460898; Sun, 6 Mar 2016 11:56:48 +0000 (UTC) From: Yaniv Gardi To: James.Bottomley@HansenPartnership.com Cc: linux-kernel@vger.kernel.org, linux-scsi@vger.kernel.org, linux-arm-msm@vger.kernel.org, santoshsy@gmail.com, linux-scsi-owner@vger.kernel.org, ygardi@codeaurora.org, Subhash Jadavani , Vinayak Holikatti , "James E.J. Bottomley" , "Martin K. Petersen" Subject: [PATCH v6 13/17] scsi: ufs: fix leakage during link off state Date: Sun, 6 Mar 2016 13:55:54 +0200 Message-Id: <1457265358-31635-14-git-send-email-ygardi@codeaurora.org> X-Mailer: git-send-email 1.8.5.2 In-Reply-To: <1457265358-31635-1-git-send-email-ygardi@codeaurora.org> References: <1457265358-31635-1-git-send-email-ygardi@codeaurora.org> X-Virus-Scanned: ClamAV using ClamSMTP Sender: linux-arm-msm-owner@vger.kernel.org Precedence: bulk List-ID: X-Mailing-List: linux-arm-msm@vger.kernel.org X-Virus-Scanned: ClamAV using ClamSMTP Currently when we try to put the link in off/disabled state during suspend, it seems link is not being kept in low power mode. This patch fixes the issue by putting the link in hibern8 first (so device also puts the link in low power mode) and then stop the host controller. Signed-off-by: Subhash Jadavani Signed-off-by: Yaniv Gardi --- drivers/scsi/ufs/ufshcd.c | 10 ++++++++++ 1 file changed, 10 insertions(+) diff --git a/drivers/scsi/ufs/ufshcd.c b/drivers/scsi/ufs/ufshcd.c index c9c4d68..f108a0b 100644 --- a/drivers/scsi/ufs/ufshcd.c +++ b/drivers/scsi/ufs/ufshcd.c @@ -5619,6 +5619,16 @@ static int ufshcd_link_state_transition(struct ufs_hba *hba, (!check_for_bkops || (check_for_bkops && !hba->auto_bkops_enabled))) { /* + * Let's make sure that link is in low power mode, we are doing + * this currently by putting the link in Hibern8. Otherway to + * put the link in low power mode is to send the DME end point + * to device and then send the DME reset command to local + * unipro. But putting the link in hibern8 is much faster. + */ + ret = ufshcd_uic_hibern8_enter(hba); + if (ret) + goto out; + /* * Change controller state to "reset state" which * should also put the link in off/reset state */