Re: [PATCH for-5.2 12/19] ftgmac100: Change interrupt status when a DMA error occurs

["Cédric Le Goater" <clg@kaod.org>]

On 8/7/20 1:51 AM, Joel Stanley wrote:
> On Thu, 6 Aug 2020 at 13:21, Cédric Le Goater <clg@kaod.org> wrote:
>>
>> The model uses today the "No transmit buffer unavailable" interrupt
>> status which it is not appropriate. According to the Aspeed specs, no
>> interrupts are raised in that case. An "AHB error" status seems like a
>> better modeling choice for all implementations since it is covered by
>> the Linux kernel.
> 
> The datasheet calls it this:
> 
>  NPTXBUF UNAVA: Normal priority transmit buffer unavailable
> 
> Perhaps we should say this:
> 
> The model uses today the "Normal priority transmit buffer unavailable"
> interrupt status which is not appropriate.

done.

> Reviewed-by: Joel Stanley <joel@jms.id.au>

Thanks,

C.
 
>>
>> Cc: Frederic Konrad <konrad.frederic@yahoo.fr>
>> Signed-off-by: Cédric Le Goater <clg@kaod.org>
>> ---
>>  hw/net/ftgmac100.c | 2 +-
>>  1 file changed, 1 insertion(+), 1 deletion(-)
>>
>> diff --git a/hw/net/ftgmac100.c b/hw/net/ftgmac100.c
>> index 5c0fe2d8cb75..014980d30aca 100644
>> --- a/hw/net/ftgmac100.c
>> +++ b/hw/net/ftgmac100.c
>> @@ -517,7 +517,7 @@ static void ftgmac100_do_tx(FTGMAC100State *s, uint32_t tx_ring,
>>          if (dma_memory_read(&address_space_memory, bd.des3, ptr, len)) {
>>              qemu_log_mask(LOG_GUEST_ERROR, "%s: failed to read packet @ 0x%x\n",
>>                            __func__, bd.des3);
>> -            s->isr |= FTGMAC100_INT_NO_NPTXBUF;
>> +            s->isr |= FTGMAC100_INT_AHB_ERR;
>>              break;
>>          }
>>
>> --
>> 2.25.4
>>