linux-kernel - [PATCH AUTOSEL 5.18 50/54] scsi: ufs: core: Fix missing clk change notification on host reset

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Message-Id: <20220720011031.1023305-50-sashal@kernel.org>
Date:   Tue, 19 Jul 2022 21:10:27 -0400
From:   Sasha Levin <sashal@...nel.org>
To:     linux-kernel@...r.kernel.org, stable@...r.kernel.org
Cc:     Po-Wen Kao <powen.kao@...iatek.com>,
        Bart Van Assche <bvanassche@....org>,
        Stanley Chu <stanley.chu@...iatek.com>,
        "Martin K . Petersen" <martin.petersen@...cle.com>,
        Sasha Levin <sashal@...nel.org>, jejb@...ux.ibm.com,
        matthias.bgg@...il.com, beanhuo@...ron.com, avri.altman@....com,
        daejun7.park@...sung.com, adrian.hunter@...el.com,
        linux-scsi@...r.kernel.org, linux-arm-kernel@...ts.infradead.org,
        linux-mediatek@...ts.infradead.org
Subject: [PATCH AUTOSEL 5.18 50/54] scsi: ufs: core: Fix missing clk change notification on host reset

From: Po-Wen Kao <powen.kao@...iatek.com>

[ Upstream commit 52a518019ca187227b786f8b8ee20869a97f3af4 ]

In ufshcd_host_reset_and_restore(), ufshcd_set_clk_freq() is called to
scale clock rate. However, this did not call vops->clk_scale_notify() to
inform platform driver of clock change.

Call ufshcd_scale_clks() instead so that clock change can be properly
handled.

Link: https://lore.kernel.org/r/20220711144224.17916-2-powen.kao@mediatek.com
Reviewed-by: Bart Van Assche <bvanassche@....org>
Reviewed-by: Stanley Chu <stanley.chu@...iatek.com>
Signed-off-by: Po-Wen Kao <powen.kao@...iatek.com>
Signed-off-by: Martin K. Petersen <martin.petersen@...cle.com>
Signed-off-by: Sasha Levin <sashal@...nel.org>
---
 drivers/scsi/ufs/ufshcd.c | 2 +-
 1 file changed, 1 insertion(+), 1 deletion(-)

diff --git a/drivers/scsi/ufs/ufshcd.c b/drivers/scsi/ufs/ufshcd.c
index 4c9eb4be449c..be7b03a90cb3 100644
--- a/drivers/scsi/ufs/ufshcd.c
+++ b/drivers/scsi/ufs/ufshcd.c
@@ -7235,7 +7235,7 @@ 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_set_clk_freq(hba, true);
+	ufshcd_scale_clks(hba, true);
 
 	err = ufshcd_hba_enable(hba);
 
-- 
2.35.1