linux-kernel - [PATCH 5.19 293/365] scsi: ufs: ufs-exynos: Change ufs phy control sequence

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Message-Id: <20220823080130.466427548@linuxfoundation.org>
Date:   Tue, 23 Aug 2022 10:03:14 +0200
From:   Greg Kroah-Hartman <gregkh@...uxfoundation.org>
To:     linux-kernel@...r.kernel.org
Cc:     Greg Kroah-Hartman <gregkh@...uxfoundation.org>,
        stable@...r.kernel.org,
        Krzysztof Kozlowski <krzysztof.kozlowski@...aro.org>,
        Chanho Park <chanho61.park@...sung.com>,
        "Martin K. Petersen" <martin.petersen@...cle.com>,
        Sasha Levin <sashal@...nel.org>
Subject: [PATCH 5.19 293/365] scsi: ufs: ufs-exynos: Change ufs phy control sequence

From: Chanho Park <chanho61.park@...sung.com>

[ Upstream commit 3d73b200f9893d8f5ba5d105e8b69c8d16744fa2 ]

Since commit 1599069a62c6 ("phy: core: Warn when phy_power_on is called
before phy_init"), the following warning has been reported:

	phy_power_on was called before phy_init

To address this, we need to remove phy_power_on from exynos_ufs_phy_init()
and move it after phy_init. phy_power_off and phy_exit are also necessary
in exynos_ufs_remove().

Link: https://lore.kernel.org/r/20220706020255.151177-4-chanho61.park@samsung.com
Reviewed-by: Krzysztof Kozlowski <krzysztof.kozlowski@...aro.org>
Signed-off-by: Chanho Park <chanho61.park@...sung.com>
Signed-off-by: Martin K. Petersen <martin.petersen@...cle.com>
Signed-off-by: Sasha Levin <sashal@...nel.org>
---
 drivers/ufs/host/ufs-exynos.c | 17 ++++++++++-------
 1 file changed, 10 insertions(+), 7 deletions(-)

diff --git a/drivers/ufs/host/ufs-exynos.c b/drivers/ufs/host/ufs-exynos.c
index a81d8cbd542f..25995667c832 100644
--- a/drivers/ufs/host/ufs-exynos.c
+++ b/drivers/ufs/host/ufs-exynos.c
@@ -910,9 +910,13 @@ static int exynos_ufs_phy_init(struct exynos_ufs *ufs)
 	if (ret) {
 		dev_err(hba->dev, "%s: phy init failed, ret = %d\n",
 			__func__, ret);
-		goto out_exit_phy;
+		return ret;
 	}
 
+	ret = phy_power_on(generic_phy);
+	if (ret)
+		goto out_exit_phy;
+
 	return 0;
 
 out_exit_phy:
@@ -1174,10 +1178,6 @@ static int exynos_ufs_init(struct ufs_hba *hba)
 		goto out;
 	}
 
-	ret = phy_power_on(ufs->phy);
-	if (ret)
-		goto phy_off;
-
 	exynos_ufs_priv_init(hba, ufs);
 
 	if (ufs->drv_data->drv_init) {
@@ -1195,8 +1195,6 @@ static int exynos_ufs_init(struct ufs_hba *hba)
 	exynos_ufs_config_smu(ufs);
 	return 0;
 
-phy_off:
-	phy_power_off(ufs->phy);
 out:
 	hba->priv = NULL;
 	return ret;
@@ -1514,9 +1512,14 @@ static int exynos_ufs_probe(struct platform_device *pdev)
 static int exynos_ufs_remove(struct platform_device *pdev)
 {
 	struct ufs_hba *hba =  platform_get_drvdata(pdev);
+	struct exynos_ufs *ufs = ufshcd_get_variant(hba);
 
 	pm_runtime_get_sync(&(pdev)->dev);
 	ufshcd_remove(hba);
+
+	phy_power_off(ufs->phy);
+	phy_exit(ufs->phy);
+
 	return 0;
 }
 
-- 
2.35.1