[PATCH net 2/3] net: fealnx: disable the PCI device on remove and probe failure

[Жамбакиев Радий Рикардинович]

From: Radiy Zhambakiev <r.zhambakiev@xxxxxxxxxxxxxxxxx>

pci_enable_device() is called in probe, but the device is never
disabled on probe failure or remove. Device remains enabled and
bus mastering stays active.

Add pci_disable_device() to the probe error unwind and to
fealnx_remove_one(), after all other resources have been released.

Found by Linux Verification Center (linuxtesting.org)

Fixes: 1da177e4c3f4 ("Linux-2.6.12-rc2")
Cc: stable@xxxxxxxxxxxxxxx
Signed-off-by: Radiy Zhambakiev <r.zhambakiev@xxxxxxxxxxxxxxxxx>
---
 drivers/net/ethernet/fealnx.c | 17 +++++++++++------
 1 file changed, 11 insertions(+), 6 deletions(-)

diff --git a/drivers/net/ethernet/fealnx.c b/drivers/net/ethernet/fealnx.c
index d7cd1644a375..46a40d00b59a 100644
--- a/drivers/net/ethernet/fealnx.c
+++ b/drivers/net/ethernet/fealnx.c
@@ -494,20 +494,22 @@ static int fealnx_init_one(struct pci_dev *pdev,
 
 	option = card_idx < MAX_UNITS ? options[card_idx] : 0;
 
-	i = pci_enable_device(pdev);
-	if (i) return i;
+	err = pci_enable_device(pdev);
+	if (err)
+		return err;
 	pci_set_master(pdev);
 
 	len = pci_resource_len(pdev, bar);
 	if (len < MIN_REGION_SIZE) {
 		dev_err(&pdev->dev,
 			   "region size %ld too small, aborting\n", len);
-		return -ENODEV;
+		err = -ENODEV;
+		goto err_out_disable;
 	}
 
-	i = pci_request_regions(pdev, boardname);
-	if (i)
-		return i;
+	err = pci_request_regions(pdev, boardname);
+	if (err)
+		goto err_out_disable;
 
 	irq = pdev->irq;
 
@@ -671,6 +673,8 @@ static int fealnx_init_one(struct pci_dev *pdev,
 	pci_iounmap(pdev, ioaddr);
 err_out_res:
 	pci_release_regions(pdev);
+err_out_disable:
+	pci_disable_device(pdev);
 	return err;
 }
 
@@ -694,6 +698,7 @@ static void fealnx_remove_one(struct pci_dev *pdev)
 			  np->rx_ring_dma);
 	pci_iounmap(pdev, np->mem);
 	pci_release_regions(pdev);
+	pci_disable_device(pdev);
 	free_netdev(dev);
 }
 
-- 
2.53.0