RE: [PATCH] examples/dma: fix max-frame-size cannot be zero

["Jiang, YuX" <yux.jiang@intel.com>]

> -----Original Message-----
> From: Chengwen Feng <fengchengwen@huawei.com>
> Sent: Tuesday, February 20, 2024 10:32 AM
> To: thomas@monjalon.net; dev@dpdk.org; Jiang, YuX <yux.jiang@intel.com>;
> Richardson, Bruce <bruce.richardson@intel.com>; Laatz, Kevin
> <kevin.laatz@intel.com>
> Subject: [PATCH] examples/dma: fix max-frame-size cannot be zero
> 
> In the original implementation, the max_frame_size could be zero, but commit
> ("examples/dma: replace getopt with argparse") treat zero as an error. This
> commit fixes it.
> 
> Also, since unsigned doesn't < 0, adjust "<= 0" judgement to "== 0".
> 
> Fixes: 8d85afb19af7 ("examples/dma: replace getopt with argparse")
> 
> Reported-by: Jiang, YuX <yux.jiang@intel.com>
> Signed-off-by: Chengwen Feng <fengchengwen@huawei.com>
> ---
>  examples/dma/dmafwd.c | 10 +++++-----
>  1 file changed, 5 insertions(+), 5 deletions(-)
> 
> diff --git a/examples/dma/dmafwd.c b/examples/dma/dmafwd.c index
> f4a0bff06e..acceae6b7b 100644
> --- a/examples/dma/dmafwd.c
> +++ b/examples/dma/dmafwd.c
> @@ -695,23 +695,23 @@ dma_parse_args(int argc, char **argv, unsigned int
> nb_ports)
>  		return ret;
> 
>  	/* check argument's value which parsing by autosave. */
> -	if (dma_batch_sz <= 0 || dma_batch_sz > MAX_PKT_BURST) {
> +	if (dma_batch_sz == 0 || dma_batch_sz > MAX_PKT_BURST) {
>  		printf("Invalid dma batch size, %d.\n", dma_batch_sz);
>  		return -1;
>  	}
> 
> -	if (max_frame_size <= 0 || max_frame_size >
> RTE_ETHER_MAX_JUMBO_FRAME_LEN) {
> +	if (max_frame_size > RTE_ETHER_MAX_JUMBO_FRAME_LEN) {
>  		printf("Invalid max frame size, %d.\n", max_frame_size);
>  		return -1;
>  	}
> 
> -	if (nb_queues <= 0 || nb_queues > MAX_RX_QUEUES_COUNT) {
> +	if (nb_queues == 0 || nb_queues > MAX_RX_QUEUES_COUNT) {
>  		printf("Invalid RX queues number %d. Max %u\n",
>  			nb_queues, MAX_RX_QUEUES_COUNT);
>  		return -1;
>  	}
> 
> -	if (ring_size <= 0) {
> +	if (ring_size == 0) {
>  		printf("Invalid ring size, %d.\n", ring_size);
>  		return -1;
>  	}
> @@ -721,7 +721,7 @@ dma_parse_args(int argc, char **argv, unsigned int
> nb_ports)
>  		ring_size = MBUF_RING_SIZE;
>  	}
> 
> -	if (stats_interval <= 0) {
> +	if (stats_interval == 0) {
>  		printf("Invalid stats interval, setting to 1\n");
>  		stats_interval = 1;	/* set to default */
>  	}
> --
> 2.17.1

Tested-by:  Yu Jiang <yux.jiang@intel.com>

Best regards,
Yu Jiang