[U-Boot] [PATCH 1/3] net: Make TFTP server timeout configurable

[Bartlomiej Sieka <tur@semihalf.com>]

Jerry Van Baren wrote:
> Bartlomiej Sieka wrote:
>> There are two aspects of a TFTP transfer involving timeouts:
>> 1. timeout waiting for initial server reply after sending RRQ
>> 2. timeouts while transferring actual data from the server
>>
>> Since the upcoming auto-update feature attempts a TFTP download during 
>> each
>> boot, it is undesirable to have a long delay when the TFTP server is not
>> available. Thus, this commit makes the server timeout (1.) 
>> configurable by two
>> global variables:
>>
>> TftpRRQTimeoutSecs
>> TftpRRQTimeoutCountMax
>>
>> TftpRRQTimeoutSecs overrides default timeout when trying to connect to 
>> a TFTP
>> server, TftpRRQTimeoutCountMax overrides default number of connection 
>> retries.
>> The total delay when trying to download a file from a non-existing 
>> TFTP server
>> is TftpRRQTimeoutSecs x TftpRRQTimeoutCountMax seconds.
> 
> Hi Bartlomiej,
> 
> Are seconds an appropriate scale factor for the timeout?

Hi Jerry,

The patch didn't introduce changes in this regard -- TFTP timeouts were
defined in seconds originally. The patch makes the timeout behavior
configurable, instead of being hardcoded, but the units remain the same:

#define TIMEOUT         5UL             /* Seconds to timeout for a lost 
pkt    */

Regards,
Bartlomiej Sieka