netdev - Re: [PATCH net-next 2/2] net: stmmac: fix number of tx queues in stmmac

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Date:   Mon, 27 Mar 2017 10:04:57 +0100
From:   Joao Pinto <Joao.Pinto@...opsys.com>
To:     Corentin Labbe <clabbe.montjoie@...il.com>,
        Joao Pinto <Joao.Pinto@...opsys.com>
CC:     <davem@...emloft.net>, <peppe.cavallaro@...com>,
        <alexandre.torgue@...com>, <thierry.reding@...il.com>,
        <sergei.shtylyov@...entembedded.com>, <f.fainelli@...il.com>,
        <niklas.cassel@...s.com>, <netdev@...r.kernel.org>
Subject: Re: [PATCH net-next 2/2] net: stmmac: fix number of tx queues in
 stmmac_poll

Às 7:26 AM de 3/25/2017, Corentin Labbe escreveu:
> On Fri, Mar 24, 2017 at 05:16:45PM +0000, Joao Pinto wrote:
>> For cores that have more than 1 TX queue configured, the kernel would crash,
>> since only one TX queue is permitted by default.
>>
>> Signed-off-by: Joao Pinto <jpinto@...opsys.com>
>> ---
>>  drivers/net/ethernet/stmicro/stmmac/stmmac_main.c | 2 +-
>>  1 file changed, 1 insertion(+), 1 deletion(-)
>>
>> diff --git a/drivers/net/ethernet/stmicro/stmmac/stmmac_main.c b/drivers/net/ethernet/stmicro/stmmac/stmmac_main.c
>> index 3827952..1eab084 100644
>> --- a/drivers/net/ethernet/stmicro/stmmac/stmmac_main.c
>> +++ b/drivers/net/ethernet/stmicro/stmmac/stmmac_main.c
>> @@ -3429,7 +3429,7 @@ static int stmmac_poll(struct napi_struct *napi, int budget)
>>  	struct stmmac_rx_queue *rx_q =
>>  		container_of(napi, struct stmmac_rx_queue, napi);
>>  	struct stmmac_priv *priv = rx_q->priv_data;
>> -	u32 tx_count = priv->dma_cap.number_tx_queues;
>> +	u32 tx_count = priv->plat->tx_queues_to_use;
>>  	u32 chan = rx_q->queue_index;
>>  	u32 work_done = 0;
>>  	u32 queue = 0;
>> -- 
>> 2.9.3
>>
> 
> This patch fix the performance issue on dwmac-sun8i only.

Ok, great!

> The dwmac-sunxi is still broken.
> 

What is the difference between the setups?

Thanks,
Joao