RE: [v2, PATCH 3/4] net: stmmac: modify default value of tx-frames

[Jose Abreu <Jose.Abreu@synopsys.com>]

From: Biao Huang <biao.huang@mediatek.com>

> the default value of tx-frames is 25, it's too late when
> passing tstamp to stack, then the ptp4l will fail:
> 
> ptp4l -i eth0 -f gPTP.cfg -m
> ptp4l: selected /dev/ptp0 as PTP clock
> ptp4l: port 1: INITIALIZING to LISTENING on INITIALIZE
> ptp4l: port 0: INITIALIZING to LISTENING on INITIALIZE
> ptp4l: port 1: link up
> ptp4l: timed out while polling for tx timestamp
> ptp4l: increasing tx_timestamp_timeout may correct this issue,
>        but it is likely caused by a driver bug
> ptp4l: port 1: send peer delay response failed
> ptp4l: port 1: LISTENING to FAULTY on FAULT_DETECTED (FT_UNSPECIFIED)
> 
> ptp4l tests pass when changing the tx-frames from 25 to 1 with
> ethtool -C option.
> It should be fine to set tx-frames default value to 1, so ptp4l will pass
> by default.

I'm not sure if this is the right approach ... What's the timeout value 
you have for TX Timestamp ?

Thanks,
Jose Miguel Abreu