From: Can Guo <cang@codeaurora.org>
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 <alim.akhtar@samsung.com>,
Avri Altman <avri.altman@wdc.com>,
"James E.J. Bottomley" <jejb@linux.ibm.com>,
"Martin K. Petersen" <martin.petersen@oracle.com>,
Stanley Chu <stanley.chu@mediatek.com>,
Bean Huo <beanhuo@micron.com>,
Bart Van Assche <bvanassche@acm.org>,
linux-kernel@vger.kernel.org (open list)
Subject: [PATCH v4 3/3] scsi: ufs: Revert "Make sure clk scaling happens only when HBA is runtime ACTIVE"
Date: Sun, 13 Dec 2020 08:31:44 -0800 [thread overview]
Message-ID: <1607877104-8916-4-git-send-email-cang@codeaurora.org> (raw)
In-Reply-To: <1607877104-8916-1-git-send-email-cang@codeaurora.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.
Signed-off-by: Can Guo <cang@codeaurora.org>
---
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 80f82cb..052479a 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"),
--
Qualcomm Innovation Center, Inc. is a member of Code Aurora Forum, a Linux Foundation Collaborative Project.
next prev parent reply other threads:[~2020-12-13 16:33 UTC|newest]
Thread overview: 10+ messages / expand[flat|nested] mbox.gz Atom feed top
2020-12-13 16:31 [PATCH v4 0/3] Three changes related with UFS clock scaling Can Guo
2020-12-13 16:31 ` [PATCH v4 1/3] scsi: ufs: Protect some contexts from unexpected " Can Guo
2020-12-15 5:43 ` Stanley Chu
2020-12-18 6:26 ` Can Guo
2020-12-16 13:31 ` Bean Huo
2020-12-13 16:31 ` [PATCH v4 2/3] scsi: ufs: Clean up ufshcd_exit_clk_scaling/gating() Can Guo
2020-12-15 5:55 ` Stanley Chu
2020-12-16 14:18 ` Bean Huo
2020-12-13 16:31 ` Can Guo [this message]
2020-12-15 6:15 ` [PATCH v4 3/3] scsi: ufs: Revert "Make sure clk scaling happens only when HBA is runtime ACTIVE" Stanley Chu
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