Re: 715/50 receive ring buffer overrun

[Martin Husemann <martin%duskware.de@localhost>]

On Mon, May 08, 2017 at 12:03:47AM +0200, Riccardo Mottola wrote:
> I had to hard-reset the box and I see this in the dmesg remaining of the
> previous boot:
> 
> iee0: iee_intr: receive ring buffer overrun
> iee0: iee_intr: receive ring buffer overrun
> iee0: iee_intr: receive ring buffer overrun
> iee0: iee_intr: receive ring buffer overrun
> iee0: iee_intr: receive ring buffer overrun
> iee0: iee_intr: receive ring buffer overrun
> iee0: iee_intr: receive error 241, rfd_status=0x9202, rfd_count=0x0000
> iee0: iee_intr: receive ring buffer overrun
> iee0: iee_intr: resource_err=332
> iee0: iee_intr: receive ring buffer overrun
> iee0: iee_intr: receive ring buffer overrun
> iee0: iee_intr: receive ring buffer overrun

I see this too. Luckily I have serial console, so I can ifconfig iee0 down/up,
and that fixes it for some time.

Something in the dma ring buffer handling gets confused, but I have not been
able to spot it (only stared at it very quickly though).

Martin