[PATCH 5.15 074/177] phy: amlogic: fix error path in phy_g12a_usb3_pcie_probe()

Greg Kroah-Hartman
2022-05-04T17:17:25Z

From: Heiner Kallweit <hkallweit1@gmail.com>

[ Upstream commit 2c8045d48dee703ad8eab2be7d6547765a89c069 ]

If clk_prepare_enable() fails we call clk_disable_unprepare()
in the error path what results in a warning that the clock
is disabled and unprepared already.
And if we fail later in phy_g12a_usb3_pcie_probe() then we
bail out w/o calling clk_disable_unprepare().
This patch fixes both errors.

Fixes: 36077e16c050 ("phy: amlogic: Add Amlogic G12A USB3 + PCIE Combo PHY Driver")
Signed-off-by: Heiner Kallweit <hkallweit1@gmail.com>
Link: https://lore.kernel.org/r/8e416f95-1084-ee28-860e-7884f7fa2e32@gmail.com
Signed-off-by: Vinod Koul <vkoul@kernel.org>
Signed-off-by: Sasha Levin <sashal@kernel.org>
---
.../phy/amlogic/phy-meson-g12a-usb3-pcie.c | 20 +++++++++++--------
1 file changed, 12 insertions(+), 8 deletions(-)

diff --git a/drivers/phy/amlogic/phy-meson-g12a-usb3-pcie.c b/drivers/phy/amlogic/phy-meson-g12a-usb3-pcie.c
index 5b471ab80fe2..54d65a6f0fcc 100644
--- a/drivers/phy/amlogic/phy-meson-g12a-usb3-pcie.c
+++ b/drivers/phy/amlogic/phy-meson-g12a-usb3-pcie.c
@@ -414,19 +414,19 @@ static int phy_g12a_usb3_pcie_probe(struct platform_device *pdev)

ret = clk_prepare_enable(priv->clk_ref);
if (ret)
- goto err_disable_clk_ref;
+ return ret;

priv->reset = devm_reset_control_array_get_exclusive(dev);
- if (IS_ERR(priv->reset))
- return PTR_ERR(priv->reset);
+ if (IS_ERR(priv->reset)) {
+ ret = PTR_ERR(priv->reset);
+ goto err_disable_clk_ref;
+ }

priv->phy = devm_phy_create(dev, np, &phy_g12a_usb3_pcie_ops);
if (IS_ERR(priv->phy)) {
ret = PTR_ERR(priv->phy);
- if (ret != -EPROBE_DEFER)
- dev_err(dev, "failed to create PHY\n");
-
- return ret;
+ dev_err_probe(dev, ret, "failed to create PHY\n");
+ goto err_disable_clk_ref;
}

phy_set_drvdata(priv->phy, priv);
@@ -434,8 +434,12 @@ static int phy_g12a_usb3_pcie_probe(struct platform_device *pdev)

phy_provider = devm_of_phy_provider_register(dev,
phy_g12a_usb3_pcie_xlate);
+ if (IS_ERR(phy_provider)) {
+ ret = PTR_ERR(phy_provider);
+ goto err_disable_clk_ref;
+ }

- return PTR_ERR_OR_ZERO(phy_provider);
+ return 0;

err_disable_clk_ref:
clk_disable_unprepare(priv->clk_ref);
--
2.35.1