[PATCH net] net: tulip: dmfe: Disable PCI device on removal

dmfe_init_one() enables the PCI device and balances that reference on
probe failures, but dmfe_remove_one() leaves the device enabled.
Disable it after unregistering the network device and releasing the
driver's mappings, DMA buffers and PCI regions.

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@vger.kernel.org
Assisted-by: LLM
Co-developed-by: Ijae Kim <redacted>
Signed-off-by: Ijae Kim <redacted>
Signed-off-by: Myeonghun Pak <redacted>
---
 drivers/net/ethernet/dec/tulip/dmfe.c | 1 +
 1 file changed, 1 insertion(+)

diff --git a/drivers/net/ethernet/dec/tulip/dmfe.c b/drivers/net/ethernet/dec/tulip/dmfe.c
index dabc091..dcf6848 100644
--- a/drivers/net/ethernet/dec/tulip/dmfe.c
+++ b/drivers/net/ethernet/dec/tulip/dmfe.c

@@ -528,6 +528,7 @@ static void dmfe_remove_one(struct pci_dev *pdev)
 				  TX_BUF_ALLOC * TX_DESC_CNT + 4,
 				  db->buf_pool_ptr, db->buf_pool_dma_ptr);
 		pci_release_regions(pdev);
+		pci_disable_device(pdev);
 		free_netdev(dev);	/* free board information */
 	}