[PATCH v5 3/3] app/procinfo: support descriptor dump

[Pattan, Reshma]

> -----Original Message-----
> +/* Enable dump Rx/Tx descriptor. */
> +#define DESC_PARAM_NUM 3
> +
> +struct desc_param {
> +	uint16_t queue_id;  /* A queue identifier on this port. */
> +	uint16_t offset;    /* The offset of the descriptor starting from tail. */
> +	uint16_t num;       /* The number of the descriptors to dump. */
> +	bool valid;

You don't need to keep if the descriptor parameters are valid or not, as you are exiting the application when you see invalid parameters are entered by user.

> 
> +static int
> +parse_descriptor_param(char *list, struct desc_param *desc) {
> +	int ret;
> +
> +	ret = sscanf(list, "%hu:%hu:%hu", &desc->queue_id, &desc->offset,
> +		     &desc->num);
> +	if (ret != DESC_PARAM_NUM) {
> +		desc->valid = false;
> +		return -EINVAL;

On error return application is exiting , so no need to maintain desc->valid

>  main(int argc, char **argv)
>  {
> @@ -1564,6 +1638,12 @@ main(int argc, char **argv)
>  			metrics_display(i);
>  #endif
> 
> +		if (rx_desc_param.valid)

So if rx_desc dump is requested in command line you can set some global variable like "enable-show-rx-desc-dump" and display below info only if that variable is set. 
So we no need to use valid here.

 

> +			nic_descriptor_display(i, &rx_desc_param,
> +					       rte_eth_rx_descriptor_dump);
> +		if (tx_desc_param.valid)

Same here as above comment.