[PATCH 1/2 v3] phy: ti: pipe3: Fix clock resource leak on probe errors

[Hongling Zeng]

When devm_phy_create() or devm_of_phy_provider_register() fails,
the refclk that was enabled earlier is not disabled, causing a
resource leak.

Fix this by adding an error handling path to disable the clock
when these functions fail.

Fixes: 234738ea3390 ("phy: ti-pipe3: move clk initialization to a separate function")
Signed-off-by: Hongling Zeng <zenghongling@xxxxxxxxxx>

---
 Change in v2:
  -Add pm_runtime_disable() in error path (reported by Sashiko AI).
---
 change in v3:
  -Fix unbalanced clock disable by checking clk_prepare_enable()return value and
setting sata_refclk_enabledonly on success.
  -Fix error path teardown order to match ti_pipe3_remove()(disable clock before
disabling runtime PM).
---
 drivers/phy/ti/phy-ti-pipe3.c | 26 ++++++++++++++++++++++----
 1 file changed, 22 insertions(+), 4 deletions(-)

diff --git a/drivers/phy/ti/phy-ti-pipe3.c b/drivers/phy/ti/phy-ti-pipe3.c
index b5543b5c674c..58fbc3b27813 100644
--- a/drivers/phy/ti/phy-ti-pipe3.c
+++ b/drivers/phy/ti/phy-ti-pipe3.c
@@ -831,21 +831,39 @@ static int ti_pipe3_probe(struct platform_device *pdev)
 	 */
 	if (phy->mode == PIPE3_MODE_SATA) {
 		if (!IS_ERR(phy->refclk)) {
-			clk_prepare_enable(phy->refclk);
+			ret = clk_prepare_enable(phy->refclk);
+			if (ret) {
+				dev_err(dev, "Failed to enable refclk %d\n", ret);
+				goto err_pm_disable;
+			}
 			phy->sata_refclk_enabled = true;
 		}
 	}
 
 	generic_phy = devm_phy_create(dev, NULL, &ops);
-	if (IS_ERR(generic_phy))
-		return PTR_ERR(generic_phy);
+	if (IS_ERR(generic_phy)) {
+		ret = PTR_ERR(generic_phy);
+		goto err_clk_disable;
+	}
 
 	phy_set_drvdata(generic_phy, phy);
 
 	ti_pipe3_power_off(generic_phy);
 
 	phy_provider = devm_of_phy_provider_register(dev, of_phy_simple_xlate);
-	return PTR_ERR_OR_ZERO(phy_provider);
+	if (IS_ERR(phy_provider)) {
+		ret = PTR_ERR(phy_provider);
+		goto err_clk_disable;
+	}
+
+	return 0;
+
+err_clk_disable:
+	if (phy->sata_refclk_enabled && !IS_ERR(phy->refclk))
+		clk_disable_unprepare(phy->refclk);
+err_pm_disable:
+	pm_runtime_disable(dev);
+	return ret;
 }
 
 static void ti_pipe3_remove(struct platform_device *pdev)
-- 
2.25.1