netxen: fix memory leak in drivers/net/netxen_nic_init.c

For kernel bugzilla #12537:
http://bugzilla.kernel.org/show_bug.cgi?id=12537

Free memory.
Signed-off-by: NDaniel Marjamäki <danielm77@spray.se>
Signed-off-by: NDavid S. Miller <davem@davemloft.net>

drivers/net/netxen/netxen_nic_init.c

@@ -947,8 +947,10 @@ int netxen_pinit_from_rom(struct netxen_adapter *adapter, int verbose)
 	}
 	for (i = 0; i < n; i++) {
 		if (netxen_rom_fast_read(adapter, 8*i + 4*offset, &val) != 0 ||
-		netxen_rom_fast_read(adapter, 8*i + 4*offset + 4, &addr) != 0)
+		netxen_rom_fast_read(adapter, 8*i + 4*offset + 4, &addr) != 0) {
+			kfree(buf);
 			return -EIO;
+		}
 
 		buf[i].addr = addr;
 		buf[i].data = val;