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[v2] scsi: ufs: core: Fix clk scaling to be conditional in reset and restore

Message ID 20250616085734.2133581-1-anvithdosapati@google.com
State New
Headers show
Series [v2] scsi: ufs: core: Fix clk scaling to be conditional in reset and restore | expand

Commit Message

Anvith Dosapati June 16, 2025, 8:57 a.m. UTC 
From: anvithdosapati <anvithdosapati@google.com>

In ufshcd_host_reset_and_restore, scale up clocks only when clock
scaling is supported. Without this change cpu latency is voted for 0
(ufshcd_pm_qos_update) during resume unconditionally.

Signed-off-by: anvithdosapati <anvithdosapati@google.com>
Fixes: a3cd5ec55f6c7 ("scsi: ufs: add load based scaling of UFS gear")
Cc: stable@vger.kernel.org
---
v2:
- Update commit message
- Add Fixes and Cc stable

 drivers/ufs/core/ufshcd.c | 3 ++-
 1 file changed, 2 insertions(+), 1 deletion(-)
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Patch

diff --git a/drivers/ufs/core/ufshcd.c b/drivers/ufs/core/ufshcd.c
index 4410e7d93b7d..fac381ea2b3a 100644
--- a/drivers/ufs/core/ufshcd.c
+++ b/drivers/ufs/core/ufshcd.c
@@ -7802,7 +7802,8 @@  static int ufshcd_host_reset_and_restore(struct ufs_hba *hba)
 	hba->silence_err_logs = false;
 
 	/* scale up clocks to max frequency before full reinitialization */
-	ufshcd_scale_clks(hba, ULONG_MAX, true);
+	if (ufshcd_is_clkscaling_supported(hba))
+		ufshcd_scale_clks(hba, ULONG_MAX, true);
 
 	err = ufshcd_hba_enable(hba);