Re: [dpdk-dev] [PATCH] eventdev: fix eth Tx adapter queue count checks

[Jerin Jacob <jerin.jacob@caviumnetworks.com>]

-----Original Message-----
> Date: Thu, 29 Nov 2018 16:41:48 +0530
> From: Nikhil Rao <nikhil.rao@intel.com>
> To: jerin.jacob@caviumnetworks.com
> CC: dev@dpdk.org, Nikhil Rao <nikhil.rao@intel.com>, stable@dpdk.org
> Subject: [PATCH] eventdev: fix eth Tx adapter queue count checks
> X-Mailer: git-send-email 1.8.3.1
> 
> 
> rte_event_eth_tx_adapter_queue_add() - add a check
> that returns an error if the ethdev the zero Tx queues
> configured.
> 
> rte_event_eth_tx_adapter_queue_del() - remove the
> checks for ethdev queue count, instead check for
> queues added to the adapter which maybe different
> from the current ethdev queue count.
> 
> Fixes: a3bbf2e09756 ("eventdev: add eth Tx adapter implementation")
> Cc: stable@dpdk.org
> Signed-off-by: Nikhil Rao <nikhil.rao@intel.com>
> ---
>  lib/librte_eventdev/rte_event_eth_tx_adapter.c | 53 +++++++++++++++++---------
>  1 file changed, 36 insertions(+), 17 deletions(-)
> 
> diff --git a/lib/librte_eventdev/rte_event_eth_tx_adapter.c b/lib/librte_eventdev/rte_event_eth_tx_adapter.c
> index ccf8a75..8431656 100644
> --- a/lib/librte_eventdev/rte_event_eth_tx_adapter.c
> +++ b/lib/librte_eventdev/rte_event_eth_tx_adapter.c
> @@ -59,6 +59,19 @@
>                 return -EINVAL; \
>  } while (0)
> 
> +#define TXA_CHECK_TXQ(dev, queue) \
> +do {\
> +       if ((dev)->data->nb_tx_queues == 0) { \
> +               RTE_EDEV_LOG_ERR("No tx queues configured"); \
> +               return -EINVAL; \
> +       } \
> +       if (queue != -1 && (uint16_t)queue >= (dev)->data->nb_tx_queues) { \

The queue should be bracket i.e ((queue) != 1) to avoid any side effect

> +               RTE_EDEV_LOG_ERR("Invalid tx queue_id %" PRIu16, \
> +                               (uint16_t)queue); \
> +               return -EINVAL; \
> +       } \
> +} while (0)
> +
>         txa = txa_service_id_to_data(id);
> -       port_id = dev->data->port_id;
> 
>         tqi = txa_service_queue(txa, port_id, tx_queue_id);
>         if (tqi == NULL || !tqi->added)
> @@ -999,11 +1027,7 @@ static int txa_service_queue_del(uint8_t id,
>         TXA_CHECK_OR_ERR_RET(id);
> 
>         eth_dev = &rte_eth_devices[eth_dev_id];
> -       if (queue != -1 && (uint16_t)queue >= eth_dev->data->nb_tx_queues) {
> -               RTE_EDEV_LOG_ERR("Invalid tx queue_id %" PRIu16,
> -                               (uint16_t)queue);
> -               return -EINVAL;
> -       }
> +       TXA_CHECK_TXQ(eth_dev, queue);
> 
>         caps = 0;
>         if (txa_dev_caps_get(id))
> @@ -1034,11 +1058,6 @@ static int txa_service_queue_del(uint8_t id,
>         TXA_CHECK_OR_ERR_RET(id);
> 
>         eth_dev = &rte_eth_devices[eth_dev_id];
> -       if (queue != -1 && (uint16_t)queue >= eth_dev->data->nb_tx_queues) {
> -               RTE_EDEV_LOG_ERR("Invalid tx queue_id %" PRIu16,
> -                               (uint16_t)queue);
> -               return -EINVAL;
> -       }

Shouldn't we need TXA_CHECK_TXQ here? If we need only one place, Do we need
macro?


> 
>         caps = 0;
> 
> --
> 1.8.3.1
>