RE: [EXT] Re: [PATCH net-next 2/2] net: stmmac: make stmmac-tx-timeout configurable in Kconfig

[Xiaoliang Yang]

Hi Heiner,

On Dec 02, 2021 at 16:13:20, Heiner Kallweit wrote:
> > stmmac_tx_timeout() function is called when a queue transmission
> > timeout. When Strict Priority is used as scheduling algorithms, the
> > lower priority queue may be blocked by a higher prority queue, which
> > will lead to tx timeout. We don't want to enable the tx watchdog
> > timeout in this case. Therefore, this patch make stmmac-tx-timeout
> configurable.
> >
> Your patch just disables the timeout handler, the WARN_ONCE() would still fire.
> And shouldn't this be a runtime setting rather than a compile-time setting?
> 
I tried to disable it in stmmac_tx_timeout() at runtime, the WARN_ONCE() will still be called from dev_watchdog() in sch_generic.c. It seems only when the timeout handler is NULL can disable the netdev watchdog up. So I did this in compile-time setting.

Regards,
Xiaoliang