linux-kernel - Re: [PATCH v4 02/10] net: eth: altera: set rx and tx ring size before init

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Message-ID: <4b1e146d-c147-7c15-dd1c-9ac5abb85641@linux.intel.com>
Date:   Thu, 23 Jul 2020 11:33:26 -0500
From:   Thor Thayer <thor.thayer@...ux.intel.com>
To:     "Ooi, Joyce" <joyce.ooi@...el.com>,
        "David S . Miller" <davem@...emloft.net>,
        Jakub Kicinski <kuba@...nel.org>
Cc:     netdev@...r.kernel.org, linux-kernel@...r.kernel.org,
        Dalon Westergreen <dalon.westergreen@...ux.intel.com>,
        Tan Ley Foon <ley.foon.tan@...el.com>,
        See Chin Liang <chin.liang.see@...el.com>,
        Dinh Nguyen <dinh.nguyen@...el.com>,
        Dalon Westergreen <dalon.westergreen@...el.com>
Subject: Re: [PATCH v4 02/10] net: eth: altera: set rx and tx ring size before
 init_dma call

On 7/8/20 2:23 AM, Ooi, Joyce wrote:
> From: Dalon Westergreen <dalon.westergreen@...el.com>
> 
> It is more appropriate to set the rx and tx ring size before calling
> the init function for the dma.
> 
> Signed-off-by: Dalon Westergreen <dalon.westergreen@...el.com>
> Signed-off-by: Joyce Ooi <joyce.ooi@...el.com>
> ---
> v2: no change
> v3: no change
> v4: no change
> ---
>   drivers/net/ethernet/altera/altera_tse_main.c | 6 ++++--
>   1 file changed, 4 insertions(+), 2 deletions(-)
> 
> diff --git a/drivers/net/ethernet/altera/altera_tse_main.c b/drivers/net/ethernet/altera/altera_tse_main.c
> index ec2b36e05c3f..a3749ffdcac9 100644
> --- a/drivers/net/ethernet/altera/altera_tse_main.c
> +++ b/drivers/net/ethernet/altera/altera_tse_main.c
> @@ -1154,6 +1154,10 @@ static int tse_open(struct net_device *dev)
>   	int i;
>   	unsigned long int flags;
>   
> +	/* set tx and rx ring size */
> +	priv->rx_ring_size = dma_rx_num;
> +	priv->tx_ring_size = dma_tx_num;
> +
>   	/* Reset and configure TSE MAC and probe associated PHY */
>   	ret = priv->dmaops->init_dma(priv);
>   	if (ret != 0) {
> @@ -1196,8 +1200,6 @@ static int tse_open(struct net_device *dev)
>   	priv->dmaops->reset_dma(priv);
>   
>   	/* Create and initialize the TX/RX descriptors chains. */
> -	priv->rx_ring_size = dma_rx_num;
> -	priv->tx_ring_size = dma_tx_num;
>   	ret = alloc_init_skbufs(priv);
>   	if (ret) {
>   		netdev_err(dev, "DMA descriptors initialization failed\n");
> 
Reviewed-by: Thor Thayer <thor.thayer@...ux.intel.com>