[PATCH] PCI: aspeed: fix clk and phy leak in aspeed_pcie_port_init error paths

[PATCH] PCI: aspeed: fix clk and phy leak in aspeed_pcie_port_init error paths

[Liu Zhenlong]

aspeed_pcie_port_init() calls clk_prepare_enable() to enable the port
clock, but if phy_init() or phy_set_mode_ext() fails afterwards, the
function returns without calling clk_disable_unprepare(), leaking the
clock reference on every probe failure.  Additionally, when
phy_set_mode_ext() fails, phy_init() has already succeeded, so
phy_exit() is also missing, leaking the phy reference.

Add the matching clk_disable_unprepare() to both error paths, and
phy_exit() to the phy_set_mode_ext() failure path, mirroring the
cleanup pattern in pci-aardvark.

Compile-tested with gcc on arm64 defconfig using COMPILE_TEST; no
hardware available for runtime testing.

Fixes: 9aa0cb68fcc1 ("PCI: aspeed: Add ASPEED PCIe RC driver")
Cc: stable@vger.kernel.org
Assisted-by: Claude:claude-opus-5
Signed-off-by: Liu Zhenlong <dragonliu2018@gmail.com>
---
 drivers/pci/controller/pcie-aspeed.c | 9 +++++++--
 1 file changed, 7 insertions(+), 2 deletions(-)

diff --git a/drivers/pci/controller/pcie-aspeed.c b/drivers/pci/controller/pcie-aspeed.c
index 9aa9e14c6148..1fd663ea3bf8 100644
--- a/drivers/pci/controller/pcie-aspeed.c
+++ b/drivers/pci/controller/pcie-aspeed.c
@@ -761,16 +761,21 @@ static int aspeed_pcie_port_init(struct aspeed_pcie_port *port)
 				     port->slot);
 
 	ret = phy_init(port->phy);
-	if (ret)
+	if (ret) {
+		clk_disable_unprepare(port->clk);
 		return dev_err_probe(dev, ret,
 				     "failed to init phy pcie for slot (%d)\n",
 				     port->slot);
+	}
 
 	ret = phy_set_mode_ext(port->phy, PHY_MODE_PCIE, PHY_MODE_PCIE_RC);
-	if (ret)
+	if (ret) {
+		phy_exit(port->phy);
+		clk_disable_unprepare(port->clk);
 		return dev_err_probe(dev, ret,
 				     "failed to set phy mode for slot (%d)\n",
 				     port->slot);
+	}
 
 	reset_control_deassert(port->perst);
 	msleep(PCIE_RESET_CONFIG_WAIT_MS);
-- 
2.55.0