[PATCH net] net: starfire: Disable PCI device on probe failures

[Myeonghun Pak]

starfire_init_one() enables the PCI device but leaves it enabled on
subsequent probe failures. Route all failures after successful enablement
through pci_disable_device(), preserving the existing error codes and
resource unwind order.

This issue is already present in the initial Git import; its pre-Git
introduction is unknown.

This issue was identified during our ongoing static-analysis research
while reviewing kernel code.

Fixes: 1da177e4c3f4 ("Linux-2.6.12-rc2")
Cc: stable@xxxxxxxxxxxxxxx
Assisted-by: LLM
Co-developed-by: Ijae Kim <ae878000@xxxxxxxxx>
Signed-off-by: Ijae Kim <ae878000@xxxxxxxxx>
Signed-off-by: Myeonghun Pak <mhun512@xxxxxxxxx>
---
 drivers/net/ethernet/adaptec/starfire.c | 13 +++++++++----
 1 file changed, 9 insertions(+), 4 deletions(-)

diff --git a/drivers/net/ethernet/adaptec/starfire.c b/drivers/net/ethernet/adaptec/starfire.c
index f1109d9..f7bd765 100644
--- a/drivers/net/ethernet/adaptec/starfire.c
+++ b/drivers/net/ethernet/adaptec/starfire.c
@@ -638,6 +638,7 @@ static int starfire_init_one(struct pci_dev *pdev,
 	void __iomem *base;
 	int drv_flags, io_size;
 	int boguscnt;
+	int err = -ENODEV;
 
 	if (pci_enable_device (pdev))
 		return -EIO;
@@ -646,12 +647,14 @@ static int starfire_init_one(struct pci_dev *pdev,
 	io_size = pci_resource_len(pdev, 0);
 	if (!ioaddr || ((pci_resource_flags(pdev, 0) & IORESOURCE_MEM) == 0)) {
 		dev_err(d, "no PCI MEM resources, aborting\n");
-		return -ENODEV;
+		goto err_out_disable;
 	}
 
 	dev = alloc_etherdev(sizeof(*np));
-	if (!dev)
-		return -ENOMEM;
+	if (!dev) {
+		err = -ENOMEM;
+		goto err_out_disable;
+	}
 
 	SET_NETDEV_DEV(dev, &pdev->dev);
 
@@ -818,7 +821,9 @@ err_out_free_res:
 	pci_release_regions (pdev);
 err_out_free_netdev:
 	free_netdev(dev);
-	return -ENODEV;
+err_out_disable:
+	pci_disable_device(pdev);
+	return err;
 }