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

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Message-ID: <20170325072621.GA20997@Red>
Date:   Sat, 25 Mar 2017 08:26:21 +0100
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 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.