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 20:43:45 +0200
From:   Corentin Labbe <clabbe.montjoie@...il.com>
To:     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

On Mon, Mar 27, 2017 at 06:06:05PM +0100, Joao Pinto wrote:
> Às 6:00 PM de 3/27/2017, Corentin Labbe escreveu:
> > On Mon, Mar 27, 2017 at 04:26:48PM +0100, Joao Pinto wrote:
> >> Hi David,
> >>
> >> 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.
> >>> The dwmac-sunxi is still broken.
> >>>
> >>
> >> This patch series can be upstreamed please, since they make 2 fixes, one of them
> >> solving the problem in dwmac-sun8i.
> >>
> >> Thanks.
> > 
> > As I said in a previous answer, finaly dwmac-sun8i is still broken.
> > Adding thoses 2 patch will just made the revert harder.
> 
> Oh, ok. You are using version >=4.00 or older versions?
> 

older for both