[U-Boot] [PATCH 1/3] net/eth: set status to active before calling init

[Sebastian Andrzej Siewior <bigeasy@linutronix.de>]

On 04/03/2012 10:41 PM, Mike Frysinger wrote:
> On Friday 23 March 2012 16:11:17 Sebastian Andrzej Siewior wrote:
>> If we set the status after successful init call then we get in trouble
>> if stdout (or setderr) is set to netconsole. If we are going to use one
>> of those (lets say printf) during ->init() the following happens:
>> - network is of (state passive)
>> - we switch on netconsole
>> - nc_getc() gets called
>> - in NetLoop() we switch on ethernet via eth_init()
>> - we end up in tsec_init() (inc case we use the tsec driver). Here we
>>    call a printf()
>
> considering your followup patches convert printf() to serial_printf(), is this
> patch still needed ?

Not for the tsec driver but it is possible that other driver do have
the same problem. I haven't also checked all the phy devices which
might do some prints. Therefore I would prefer to have this in.

>> --- a/net/eth.c
>> +++ b/net/eth.c
>> @@ -380,14 +380,17 @@ int eth_init(bd_t *bis)
>>
>>   	old_current = eth_current;
>>   	do {
>> +		int old_state;
>> +
>>   		debug("Trying %s\n", eth_current->name);
>>
>> -		if (eth_current->init(eth_current,bis)>= 0) {
>> -			eth_current->state = ETH_STATE_ACTIVE;
>> -
>> +		old_state = eth_current->state;
>> +		eth_current->state = ETH_STATE_ACTIVE;
>> +		if (eth_current->init(eth_current,bis)>= 0)
>>   			return 0;
>> -		}
>> +
>>   		debug("FAIL\n");
>> +		eth_current->state = old_state;
>>
>>   		eth_try_another(0);
>>   	} while (old_current != eth_current);
>
> this needs a comment in the code explaining why you're setting things active
> early and then turning it off

Okay.

> -mike

Sebastian