pcnet driver does not have write_hwaddr function.
However, eth stuff executes write_hwaddr function
because eth_device structure has not been initialized.
Signed-off-by: Nobuhiro Iwamatsu <iwamatsu@nigauri.org>
CC: Ben Warren <biggerbadderben@gmail.com>
                 * Allocate and pre-fill the device structure.
                 */
                dev = (struct eth_device *) malloc (sizeof *dev);
+               if (!dev) {
+                       printf("pcnet: Can not allocate memory\n");
+                       break;
+               }
+               memset(dev, 0, sizeof(*dev));
                dev->priv = (void *) devbusfn;
                sprintf (dev->name, "pcnet#%d", dev_nr);