scsi: ufs: ufs-mediatek: Fix wrong location for ref-clk delay

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>

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;
 }