vxge: use pci_dma_mapping_error to test return value

pci_dma_mapping_error should be used to test return value of
pci_map_single or pci_map_page.
Signed-off-by: NDenis Kirjanov <kirjanov@gmail.com>
Signed-off-by: NDavid S. Miller <davem@davemloft.net>

drivers/net/vxge/vxge-main.c

@@ -310,7 +310,7 @@ static int vxge_rx_map(void *dtrh, struct vxge_ring *ring)
 	dma_addr = pci_map_single(ring->pdev, rx_priv->skb_data,
 				rx_priv->data_size, PCI_DMA_FROMDEVICE);
 
-	if (dma_addr == 0) {
+	if (unlikely(pci_dma_mapping_error(ring->pdev, dma_addr))) {
 		ring->stats.pci_map_fail++;
 		return -EIO;
 	}