From: Peter Wang <peter.wang@mediatek.com>
Date: Sat, 16 Oct 2021 08:58:02 +0800
Subject: [PATCH] scsi: ufs: ufs-mediatek: Fix wrong location for ref-clk delay
Git-commit: 25d542a8537455a3335448a3fa53cf3704883389
Patch-mainline: v5.16-rc1
References: jsc#PED-818

Fix the location of delay for ref-clk gating and ungating in
ufs_mtk_setup_ref_clk().

Link: https://lore.kernel.org/r/20211016005802.7729-4-stanley.chu@mediatek.com
Reviewed-by: Stanley Chu <stanley.chu@mediatek.com>
Signed-off-by: Peter Wang <peter.wang@mediatek.com>
Signed-off-by: Stanley Chu <stanley.chu@mediatek.com>
Signed-off-by: Martin K. Petersen <martin.petersen@oracle.com>
Acked-by: Hannes Reinecke <hare@suse.com>
---
 drivers/scsi/ufs/ufs-mediatek.c | 8 ++++----
 1 file changed, 4 insertions(+), 4 deletions(-)

diff --git a/drivers/scsi/ufs/ufs-mediatek.c b/drivers/scsi/ufs/ufs-mediatek.c
index bc193ba46b31..d0a8e1319ab3 100644
--- a/drivers/scsi/ufs/ufs-mediatek.c
+++ b/drivers/scsi/ufs/ufs-mediatek.c
@@ -247,9 +247,9 @@ static int ufs_mtk_setup_ref_clk(struct ufs_hba *hba, bool on)
 
 	if (on) {
 		ufs_mtk_ref_clk_notify(on, res);
-		ufshcd_delay_us(host->ref_clk_ungating_wait_us, 10);
 		ufshcd_writel(hba, REFCLK_REQUEST, REG_UFS_REFCLK_CTRL);
 	} else {
+		ufshcd_delay_us(host->ref_clk_gating_wait_us, 10);
 		ufshcd_writel(hba, REFCLK_RELEASE, REG_UFS_REFCLK_CTRL);
 	}
 
@@ -274,10 +274,10 @@ static int ufs_mtk_setup_ref_clk(struct ufs_hba *hba, bool on)
 
 out:
 	host->ref_clk_enabled = on;
-	if (!on) {
-		ufshcd_delay_us(host->ref_clk_gating_wait_us, 10);
+	if (on)
+		ufshcd_delay_us(host->ref_clk_ungating_wait_us, 10);
+	else
 		ufs_mtk_ref_clk_notify(on, res);
-	}
 
 	return 0;
 }
-- 
2.35.3