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| author | Ziqi Chen <quic_ziqichen@quicinc.com> | 2025-02-13 11:00:06 +0300 |
|---|---|---|
| committer | Martin K. Petersen <martin.petersen@oracle.com> | 2025-02-21 05:53:49 +0300 |
| commit | eff26ad4c34fc78303c14be749e10ca61c4d211f (patch) | |
| tree | 5e40b4ab2172346452d7b419ce86596f4e6d1927 | |
| parent | 129b44c27c8a51cb74b2f68fde57f2a2e7f5696b (diff) | |
| download | linux-eff26ad4c34fc78303c14be749e10ca61c4d211f.tar.xz | |
scsi: ufs: core: Check if scaling up is required when disable clkscale
When disabling clkscale via the clkscale_enable sysfs entry, UFS driver
shall perform scaling up once regardless. Check if scaling up is required
or not first to avoid repetitive work.
Signed-off-by: Ziqi Chen <quic_ziqichen@quicinc.com>
Co-developed-by: Can Guo <quic_cang@quicinc.com>
Signed-off-by: Can Guo <quic_cang@quicinc.com>
Link: https://lore.kernel.org/r/20250213080008.2984807-7-quic_ziqichen@quicinc.com
Reviewed-by: Bart Van Assche <bvanassche@acm.org>
Tested-by: Neil Armstrong <neil.armstrong@linaro.org>
Reviewed-by: Bean Huo <beanhuo@micron.com>
Reviewed-by: Peter Wang <peter.wang@mediatek.com>
Signed-off-by: Martin K. Petersen <martin.petersen@oracle.com>
| -rw-r--r-- | drivers/ufs/core/ufshcd.c | 4 |
1 files changed, 4 insertions, 0 deletions
diff --git a/drivers/ufs/core/ufshcd.c b/drivers/ufs/core/ufshcd.c index 637901d09054..e59ce8e5509e 100644 --- a/drivers/ufs/core/ufshcd.c +++ b/drivers/ufs/core/ufshcd.c @@ -1767,6 +1767,10 @@ static ssize_t ufshcd_clkscale_enable_store(struct device *dev, freq = clki->max_freq; ufshcd_suspend_clkscaling(hba); + + if (!ufshcd_is_devfreq_scaling_required(hba, freq, true)) + goto out_rel; + err = ufshcd_devfreq_scale(hba, freq, true); if (err) dev_err(hba->dev, "%s: failed to scale clocks up %d\n", |