From patchwork Sun Dec 20 05:42:47 2020 Content-Type: text/plain; charset="utf-8" MIME-Version: 1.0 Content-Transfer-Encoding: 7bit X-Patchwork-Submitter: Can Guo X-Patchwork-Id: 11983807 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=-16.8 required=3.0 tests=BAYES_00, HEADER_FROM_DIFFERENT_DOMAINS,INCLUDES_CR_TRAILER,INCLUDES_PATCH, MAILING_LIST_MULTI,SPF_HELO_NONE,SPF_PASS,USER_AGENT_GIT autolearn=unavailable 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 82C62C2BBCD for ; Sun, 20 Dec 2020 05:44:04 +0000 (UTC) Received: from vger.kernel.org (vger.kernel.org [23.128.96.18]) by mail.kernel.org (Postfix) with ESMTP id 538A923A82 for ; Sun, 20 Dec 2020 05:44:04 +0000 (UTC) Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S1726809AbgLTFnq (ORCPT ); Sun, 20 Dec 2020 00:43:46 -0500 Received: from labrats.qualcomm.com ([199.106.110.90]:23395 "EHLO labrats.qualcomm.com" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S1726099AbgLTFnq (ORCPT ); Sun, 20 Dec 2020 00:43:46 -0500 IronPort-SDR: RCN3T0Uid7HhfOQilNLdImPJtMoutoSW4oODCDaA5dqXhd0Tz4MrYGo7jkjVNMakN7bfiij6xk LbxmgqkqKOivwQUCiHtyIIN/QmInTYGuM9SuwLTww42V5WaGPOVW2/jtEkJ6ukbXnXOYC1KEDP EYbfDMIsu/WHPWmnpK8nEbyMIX4vyCzZdpVYKMSb2LxV2rxiTCo3RZERiR/7NtlkbxYLH3DK4v 6B8jmu23ViY2FrcS+Kf6O4MjJT6HW7scwx+0Tl/yyEivgMFROS4Ij9Gsl8TqbmWZdmFxWNHEVy jDo= X-IronPort-AV: E=Sophos;i="5.78,434,1599548400"; d="scan'208";a="47599281" Received: from unknown (HELO ironmsg04-sd.qualcomm.com) ([10.53.140.144]) by labrats.qualcomm.com with ESMTP; 19 Dec 2020 21:43:06 -0800 X-QCInternal: smtphost Received: from stor-presley.qualcomm.com ([192.168.140.85]) by ironmsg04-sd.qualcomm.com with ESMTP; 19 Dec 2020 21:43:05 -0800 Received: by stor-presley.qualcomm.com (Postfix, from userid 359480) id 1FB79212A8; Sat, 19 Dec 2020 21:43:05 -0800 (PST) From: Can Guo To: asutoshd@codeaurora.org, nguyenb@codeaurora.org, hongwus@codeaurora.org, rnayak@codeaurora.org, linux-scsi@vger.kernel.org, kernel-team@android.com, saravanak@google.com, salyzyn@google.com, cang@codeaurora.org Cc: Alim Akhtar , Avri Altman , "James E.J. Bottomley" , "Martin K. Petersen" , Matthias Brugger , Stanley Chu , Bean Huo , Bart Van Assche , linux-kernel@vger.kernel.org (open list), linux-arm-kernel@lists.infradead.org (moderated list:ARM/Mediatek SoC support), linux-mediatek@lists.infradead.org (moderated list:ARM/Mediatek SoC support) Subject: [PATCH v6 3/3] scsi: ufs: Revert "Make sure clk scaling happens only when HBA is runtime ACTIVE" Date: Sat, 19 Dec 2020 21:42:47 -0800 Message-Id: <1608442968-38560-4-git-send-email-cang@codeaurora.org> X-Mailer: git-send-email 2.7.4 In-Reply-To: <1608442968-38560-1-git-send-email-cang@codeaurora.org> References: <1608442968-38560-1-git-send-email-cang@codeaurora.org> Precedence: bulk List-ID: X-Mailing-List: linux-scsi@vger.kernel.org Commit 73cc291c27024 ("Make sure clk scaling happens only when HBA is runtime ACTIVE") is no longer needed since commit f7a42540928a8 ("scsi: ufs: Protect some contexts from unexpected clock scaling") is a more mature fix to protect UFS LLD stability from clock scaling invoked through sysfs nodes by users. Reviewed-by: Stanley Chu Signed-off-by: Can Guo --- drivers/scsi/ufs/ufshcd.c | 7 ------- 1 file changed, 7 deletions(-) diff --git a/drivers/scsi/ufs/ufshcd.c b/drivers/scsi/ufs/ufshcd.c index 2dee21e..7229a1b 100644 --- a/drivers/scsi/ufs/ufshcd.c +++ b/drivers/scsi/ufs/ufshcd.c @@ -1300,15 +1300,8 @@ static int ufshcd_devfreq_target(struct device *dev, } spin_unlock_irqrestore(hba->host->host_lock, irq_flags); - pm_runtime_get_noresume(hba->dev); - if (!pm_runtime_active(hba->dev)) { - pm_runtime_put_noidle(hba->dev); - ret = -EAGAIN; - goto out; - } start = ktime_get(); ret = ufshcd_devfreq_scale(hba, scale_up); - pm_runtime_put(hba->dev); trace_ufshcd_profile_clk_scaling(dev_name(hba->dev), (scale_up ? "up" : "down"),