[U-Boot] Q on expected u-boot behavior on ping response

[John Rama]

Thanks, Chris !!
Understood. 

John

On 2016/09/01 10:42, Chris Packham wrote:
> On Tue, Aug 30, 2016 at 10:19 PM, John Rama <john.rama01 at gmail.com> wrote:
>> Dear u-boot network experts,
>>
>> I'm now working on NXP MX6Q Sabreauto board with AR8031 network card.
>> I'm using rel_imx_4.1.15_1.2.0_ga.
>>
>> Basically, the network works fine. u-boot can send ping to other device, do the tftp boot as well.
>>
>> But, I just realized that u-boot never respond on ping command from external device.
>> Only the exception is that while u-boot is trying to communicate to other device via network
>> (sending a ping command to others, or doing tftp boot, etc)
>>
>> I'm not dug into detail yet.
>> But before doing so, I would like to confirm if this is a intentional behavior or not.
> 
> Yes this is intentional. u-boot only starts the network driver when it
> needs to use it (i.e. to send a ping or download something over tftp).
> After it has finished the network driver is stopped. Any traffic on
> the network will be ignored if u-boot isn't actively trying to perform
> a network operation, even if it is addressed to the device.
> 
>> I have only tried the MX6Q Sabre auto device, since this is the only device I have now.
>>
>> Thanks for the feedback.
>>
>> John
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