diff mbox series

[v2,6/8] scsi: ufs: core: Check if scaling up is required when disable clkscale

Message ID 20250122100214.489749-7-quic_ziqichen@quicinc.com
State New
Headers show
Series [v2,1/8] scsi: ufs: core: Pass target_freq to clk_scale_notify() vops | expand

Commit Message

Ziqi Chen Jan. 22, 2025, 10:02 a.m. UTC 
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.

Co-developed-by: Can Guo <quic_cang@quicinc.com>
Signed-off-by: Can Guo <quic_cang@quicinc.com>
Signed-off-by: Ziqi Chen <quic_ziqichen@quicinc.com>
---
 drivers/ufs/core/ufshcd.c | 4 ++++
 1 file changed, 4 insertions(+)
diff mbox series

Patch

diff --git a/drivers/ufs/core/ufshcd.c b/drivers/ufs/core/ufshcd.c
index e0fc198328a5..741ddf3a0cb5 100644
--- a/drivers/ufs/core/ufshcd.c
+++ b/drivers/ufs/core/ufshcd.c
@@ -1772,6 +1772,10 @@  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",