From mboxrd@z Thu Jan  1 00:00:00 1970
From: Bruce Richardson <bruce.richardson@intel.com>
Subject: Re: [PATCH v4 15/23] rte_ethdev.h: align sign and scope
 of temp var
Date: Thu, 17 May 2018 14:54:18 +0100
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To: Andy Green <andy@warmcat.com>
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On Mon, May 14, 2018 at 01:10:43PM +0800, Andy Green wrote:
> Signed-off-by: Andy Green <andy@warmcat.com>
> ---
>  lib/librte_ethdev/rte_ethdev.h |   25 +++++++++++++++----------
>  1 file changed, 15 insertions(+), 10 deletions(-)
> 

While I dislike the changes below, since I believe it's always more
readable to declare variables at first use, if the changes are needed to
remove compiler errors in apps, then they need to be fixed.

Patch needs a suitable commit log explaining the changes or giving the
error message.


> diff --git a/lib/librte_ethdev/rte_ethdev.h b/lib/librte_ethdev/rte_ethdev.h
> index 49c2ebbd5..2cb5fe3be 100644
> --- a/lib/librte_ethdev/rte_ethdev.h
> +++ b/lib/librte_ethdev/rte_ethdev.h
> @@ -3801,6 +3801,7 @@ rte_eth_rx_burst(uint16_t port_id, uint16_t queue_id,
>  		 struct rte_mbuf **rx_pkts, const uint16_t nb_pkts)
>  {
>  	struct rte_eth_dev *dev = &rte_eth_devices[port_id];
> +	uint16_t nb_rx;
>  
>  #ifdef RTE_LIBRTE_ETHDEV_DEBUG
>  	RTE_ETH_VALID_PORTID_OR_ERR_RET(port_id, 0);
> @@ -3811,18 +3812,22 @@ rte_eth_rx_burst(uint16_t port_id, uint16_t queue_id,
>  		return 0;
>  	}
>  #endif
> -	int16_t nb_rx = (*dev->rx_pkt_burst)(dev->data->rx_queues[queue_id],
> -			rx_pkts, nb_pkts);
> +	nb_rx = (*dev->rx_pkt_burst)(dev->data->rx_queues[queue_id],
> +				     rx_pkts, nb_pkts);
>  
>  #ifdef RTE_ETHDEV_RXTX_CALLBACKS
> -	struct rte_eth_rxtx_callback *cb = dev->post_rx_burst_cbs[queue_id];
> -
> -	if (unlikely(cb != NULL)) {
> -		do {
> -			nb_rx = cb->fn.rx(port_id, queue_id, rx_pkts, nb_rx,
> -						nb_pkts, cb->param);
> -			cb = cb->next;
> -		} while (cb != NULL);
> +	{
> +		struct rte_eth_rxtx_callback *cb =
> +				dev->post_rx_burst_cbs[queue_id];
> +
> +		if (unlikely(cb != NULL)) {
> +			do {
> +				nb_rx = cb->fn.rx(port_id, queue_id,
> +						  rx_pkts, nb_rx,
> +						  nb_pkts, cb->param);
> +				cb = cb->next;
> +			} while (cb != NULL);
> +		}
>  	}
>  #endif

Rather than increasing the level of indentation needed with the extra
braces, it's probably best to separate variable definition and assignment
as you did in the first change above.

/Bruce