netxen: do_rom_fast_write error handling

Compiler warning spots real error!

The function do_rom_fast_read called in do_rom_fast_write can fail
and leave data1 unset. This causes a compile warning.
The correct thing is to propagate the error out.
Signed-off-by: Stephen Hemminger <shemminger@linux-foundation.org>
Signed-off-by: Jeff Garzik <jeff@garzik.org>

drivers/net/netxen/netxen_nic_init.c

@@ -499,7 +499,10 @@ static inline int do_rom_fast_write_words(struct netxen_adapter *adapter,
 		while(1) {
 			int data1;
 
-			do_rom_fast_read(adapter, addridx, &data1);
+			ret = do_rom_fast_read(adapter, addridx, &data1);
+			if (ret < 0)
+				return ret;
+
 			if (data1 == data)
 				break;