[dpdk-dev] [PATCH] net/fm10k: initialize link status in device start

[Chen, Jing D]

Hi,

> -----Original Message-----
> From: Wang, Xiao W
> Sent: Wednesday, May 31, 2017 7:07 PM
> To: Chen, Jing D <jing.d.chen at intel.com>
> Cc: dev at dpdk.org; Wang, Xiao W <xiao.w.wang at intel.com>;
> stable at dpdk.org
> Subject: [PATCH] net/fm10k: initialize link status in device start
> 
> If port LSC interrupt is configured, application will read link status directly, so
> driver need to prepare that value in advance.

Fm10k host driver can't manage PHY directly and provide a fake link status, 
so it always provide a constant value, whatever lsc is set or not.
I think you need to reorganize the message. :)

> 
> Fixes: 9ae6068c86da ("fm10k: add dev start/stop")
> Cc: stable at dpdk.org
> 
> Signed-off-by: Xiao Wang <xiao.w.wang at intel.com>
> ---
>  drivers/net/fm10k/fm10k_ethdev.c | 5 +++++
>  1 file changed, 5 insertions(+)
> 
> diff --git a/drivers/net/fm10k/fm10k_ethdev.c
> b/drivers/net/fm10k/fm10k_ethdev.c
> index a742eec..54bf10c 100644
> --- a/drivers/net/fm10k/fm10k_ethdev.c
> +++ b/drivers/net/fm10k/fm10k_ethdev.c
> @@ -84,6 +84,8 @@ static void fm10k_MAC_filter_set(struct rte_eth_dev
> *dev,  static void fm10k_set_rx_function(struct rte_eth_dev *dev);  static
> void fm10k_set_tx_function(struct rte_eth_dev *dev);  static int
> fm10k_check_ftag(struct rte_devargs *devargs);
> +static int fm10k_link_update(struct rte_eth_dev *dev,
> +	__rte_unused int wait_to_complete);
> 
>  struct fm10k_xstats_name_off {
>  	char name[RTE_ETH_XSTATS_NAME_SIZE];
> @@ -1166,6 +1168,9 @@ static inline int fm10k_glort_valid(struct fm10k_hw
> *hw)
>  	if (!(dev->data->dev_conf.rxmode.mq_mode &
> ETH_MQ_RX_VMDQ_FLAG))
>  		fm10k_vlan_filter_set(dev, hw->mac.default_vid, true);
> 
> +	if (dev->data->dev_conf.intr_conf.lsc != 0)
> +		fm10k_link_update(dev, 0);
> +

I'll recommend updating link status anyway when port starts, not considering
lsc set status.

>  	return 0;
>  }
> 
> --
> 1.8.3.1