netdev - Re: [PATCH] [net-next] stmmac: use netif_set_real_num_{rx,tx}

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Date:   Fri, 31 Mar 2017 11:14:10 +0100
From:   Joao Pinto <Joao.Pinto@...opsys.com>
To:     David Miller <davem@...emloft.net>, <clabbe.montjoie@...il.com>
CC:     <treding@...dia.com>, <arnd@...db.de>, <peppe.cavallaro@...com>,
        <alexandre.torgue@...com>, <Joao.Pinto@...opsys.com>,
        <netdev@...r.kernel.org>, <linux-kernel@...r.kernel.org>
Subject: Re: [PATCH] [net-next] stmmac: use netif_set_real_num_{rx,tx}_queues

Às 6:48 PM de 3/30/2017, David Miller escreveu:
> From: Thierry Reding <treding@...dia.com>
> Date: Thu, 30 Mar 2017 16:34:36 +0200
> 
>> On Thu, Mar 30, 2017 at 09:45:36AM +0200, Corentin Labbe wrote:
>>> On Tue, Mar 28, 2017 at 06:01:05PM -0700, David Miller wrote:
>>>> From: Arnd Bergmann <arnd@...db.de>
>>>> Date: Tue, 28 Mar 2017 11:48:21 +0200
>>>>
>>>>> A driver must not access the two fields directly but should instead use
>>>>> the helper functions to set the values and keep a consistent internal
>>>>> state:
>>>>>
>>>>> ethernet/stmicro/stmmac/stmmac_main.c: In function 'stmmac_dvr_probe':
>>>>> ethernet/stmicro/stmmac/stmmac_main.c:4083:8: error: 'struct net_device' has no member named 'real_num_rx_queues'; did you mean 'real_num_tx_queues'?
>>>>>
>>>>> Fixes: a8f5102af2a7 ("net: stmmac: TX and RX queue priority configuration")
>>>>> Signed-off-by: Arnd Bergmann <arnd@...db.de>
>>>>
>>>> Applied.
>>>
>>> This break my revert patch. (since it patch ("net: stmmac: enable multiple buffers").
>>> Since dwmac-sunxi is still broken, what can I do ? send two revert patch ? or adapt the reverting patch.
>>
>> Have you tried if the kcalloc() patch I sent on Tuesday fixes things the
>> issues introduced by the multiple buffers patch? Niklas reported that it
>> restores functionality on his setup.
> 
> I think he said yesterday that he did indeed test all of your patches and it
> did not fix things for him.
> 
> http://marc.info/?l=linux-kernel&m=149076922813085&w=2
> 
> I am going to revert the enable multiple buffers commit, and I would ask that
> all involved parties work together in the background to resolve all of this.
> 
> Thank you.
> 

@David: Agreed.

@Corentin: Please check if the DMA Engine is well configured and if the dma
rx/tx has started. This is done by dumping the DMA Registers.
Please also check the MAC related registers and dump them in order to have a
clear picture if the IP is being well configured.
This is critial to analise what's hapenning in your setup.

Joao