Re: [PATCH] net: stmmac: dwmac-loongson: Set correct {tx,rx}_fifo_size

[Yanteng Si <si.yanteng@linux.dev>]

在 1/21/25 17:37, Huacai Chen 写道:
> Now for dwmac-loongson {tx,rx}_fifo_size are uninitialised, which means
> zero. This means dwmac-loongson doesn't support changing MTU, so set the
> correct tx_fifo_size and rx_fifo_size for it (16KB multiplied by channel
> counts).
> 
> Note: the Fixes tag is not exactly right, but it is a key commit of the
> dwmac-loongson series.
> 
> Cc: stable@vger.kernel.org
> Fixes: ad72f783de06827a1f ("net: stmmac: Add multi-channel support")
> Signed-off-by: Chong Qiao <qiaochong@loongson.cn>
> Signed-off-by: Huacai Chen <chenhuacai@loongson.cn>
Acked-by: Yanteng Si <si.yanteng@linux.dev>

Thanks,
Yanteng
> ---
>   drivers/net/ethernet/stmicro/stmmac/dwmac-loongson.c | 3 +++
>   1 file changed, 3 insertions(+)
> 
> diff --git a/drivers/net/ethernet/stmicro/stmmac/dwmac-loongson.c b/drivers/net/ethernet/stmicro/stmmac/dwmac-loongson.c
> index bfe6e2d631bd..79acdf38c525 100644
> --- a/drivers/net/ethernet/stmicro/stmmac/dwmac-loongson.c
> +++ b/drivers/net/ethernet/stmicro/stmmac/dwmac-loongson.c
> @@ -574,6 +574,9 @@ static int loongson_dwmac_probe(struct pci_dev *pdev, const struct pci_device_id
>   	if (ret)
>   		goto err_disable_device;
>   
> +	plat->tx_fifo_size = SZ_16K * plat->tx_queues_to_use;
> +	plat->rx_fifo_size = SZ_16K * plat->rx_queues_to_use;
> +
>   	if (dev_of_node(&pdev->dev))
>   		ret = loongson_dwmac_dt_config(pdev, plat, &res);
>   	else