On 15.12.2016 22:32, Lino Sanfilippo wrote:

> Ah ok. Then maybe priv->hw->dma->stop_tx() does not do the job correctly (stop the
> tx path properly) and the HW is still active on the tx path while the tx buffers are
> freed. OTOH stmmac_release() also stops the phy before the tx (and rx) paths are stopped.
> Did you try to stop the phy fist in stmmac_tx_err_work(), too?
> 
> Regards,
> Lino
> 

And this is the "sledgehammer" approach: Do a complete shutdown and restart
of the hardware in case of tx error (against net-next and only compile tested).