[PATCH] fix: PCI: dra7xx: dra7xx_pcie_probe: fix missing device_link_del on phy error paths

[WenTao Liang <vulab@iscas.ac.cn>]

In dra7xx_pcie_probe(), when devm_phy_get() fails for a later phy device
  (i > 0), the function directly returns PTR_ERR(phy[i]) without calling
  device_link_del() on previously added device links. Similarly, when
  dra7xx_pcie_enable_phy() fails, all phy_count device links are leaked as
  the function returns directly without cleanup.

Change the error paths to jump to the existing err_link label which
  properly iterates through link[0..i) and calls device_link_del() for
  each.

Cc: stable@vger.kernel.org
Signed-off-by: WenTao Liang <vulab@iscas.ac.cn>
---
 drivers/pci/controller/dwc/pci-dra7xx.c | 12 ++++++++----
 1 file changed, 8 insertions(+), 4 deletions(-)

diff --git a/drivers/pci/controller/dwc/pci-dra7xx.c b/drivers/pci/controller/dwc/pci-dra7xx.c
index cd904659c321..153ee6f7dbfc 100644
--- a/drivers/pci/controller/dwc/pci-dra7xx.c
+++ b/drivers/pci/controller/dwc/pci-dra7xx.c
@@ -743,8 +743,10 @@ static int dra7xx_pcie_probe(struct platform_device *pdev)
 	for (i = 0; i < phy_count; i++) {
 		snprintf(name, sizeof(name), "pcie-phy%d", i);
 		phy[i] = devm_phy_get(dev, name);
-		if (IS_ERR(phy[i]))
-			return PTR_ERR(phy[i]);
+		if (IS_ERR(phy[i])) {
+			ret = PTR_ERR(phy[i]);
+			goto err_link;
+		}
 
 		link[i] = device_link_add(dev, &phy[i]->dev, DL_FLAG_STATELESS);
 		if (!link[i]) {
@@ -767,7 +769,8 @@ static int dra7xx_pcie_probe(struct platform_device *pdev)
 	ret = dra7xx_pcie_enable_phy(dra7xx);
 	if (ret) {
 		dev_err(dev, "failed to enable phy\n");
-		return ret;
+		dra7xx_pcie_disable_phy(dra7xx);
+		goto err_link;
 	}
 
 	platform_set_drvdata(pdev, dra7xx);
@@ -910,7 +913,8 @@ static int dra7xx_pcie_resume_noirq(struct device *dev)
 	ret = dra7xx_pcie_enable_phy(dra7xx);
 	if (ret) {
 		dev_err(dev, "failed to enable phy\n");
-		return ret;
+		dra7xx_pcie_disable_phy(dra7xx);
+		goto err_link;
 	}
 
 	return 0;
-- 
2.39.5 (Apple Git-154)