net: atheros: atl2: don't return zero on failure path in atl2_probe()

If dma mask checks fail in atl2_probe(), it breaks off initialization,
deallocates all resources, but returns zero.

The patch adds proper error code return value and
make error code setup unified.

Found by Linux Driver Verification project (linuxtesting.org).

Signed-off-by: Alexey Khoroshilov <khoroshilov@ispras.ru>
Signed-off-by: David S. Miller <davem@davemloft.net>

diff --git a/drivers/net/ethernet/atheros/atlx/atl2.c b/drivers/net/ethernet/atheros/atlx/atl2.c
index 63f2deec2a52994684fa7a58763f68502265542e..77a1c03255defa77f2c662650d41a1ffc68eb7bb 100644 (file)
--- a/drivers/net/ethernet/atheros/atlx/atl2.c
+++ b/drivers/net/ethernet/atheros/atlx/atl2.c
@@ -1353,6 +1353,7 @@ static int atl2_probe(struct pci_dev *pdev, const struct pci_device_id *ent)
        if (pci_set_dma_mask(pdev, DMA_BIT_MASK(32)) &&
                pci_set_consistent_dma_mask(pdev, DMA_BIT_MASK(32))) {
                printk(KERN_ERR "atl2: No usable DMA configuration, aborting\n");
+               err = -EIO;
                goto err_dma;
        }
 
@@ -1366,10 +1367,11 @@ static int atl2_probe(struct pci_dev *pdev, const struct pci_device_id *ent)
         * pcibios_set_master to do the needed arch specific settings */
        pci_set_master(pdev);
 
-       err = -ENOMEM;
        netdev = alloc_etherdev(sizeof(struct atl2_adapter));
-       if (!netdev)
+       if (!netdev) {
+               err = -ENOMEM;
                goto err_alloc_etherdev;
+       }
 
        SET_NETDEV_DEV(netdev, &pdev->dev);
 
@@ -1408,8 +1410,6 @@ static int atl2_probe(struct pci_dev *pdev, const struct pci_device_id *ent)
        if (err)
                goto err_sw_init;
 
-       err = -EIO;
-
        netdev->hw_features = NETIF_F_HW_VLAN_CTAG_RX;
        netdev->features |= (NETIF_F_HW_VLAN_CTAG_TX | NETIF_F_HW_VLAN_CTAG_RX);