[dpdk-stable] [PATCH] net/iavf: fix vector mapping with queue

[Xing, Beilei]

> -----Original Message-----
> From: Wu, Jingjing <jingjing.wu at intel.com>
> Sent: Thursday, January 28, 2021 10:37 AM
> To: dev at dpdk.org
> Cc: Wu, Jingjing <jingjing.wu at intel.com>; Xing, Beilei <beilei.xing at intel.com>;
> stable at dpdk.org
> Subject: [PATCH] net/iavf: fix vector mapping with queue
> 
> Fix the vector mapping with queue by changing the recircle when exceeds
> RX_VEC_START + nb_msix;
> 
> Fixes: d6bde6b5eae9 ("net/avf: enable Rx interrupt")
> 
> Signed-off-by: Jingjing Wu <jingjing.wu at intel.com>
> ---
>  drivers/net/iavf/iavf_ethdev.c | 4 ++--
>  1 file changed, 2 insertions(+), 2 deletions(-)
> 
> diff --git a/drivers/net/iavf/iavf_ethdev.c b/drivers/net/iavf/iavf_ethdev.c
> index cf6ea0b15..eb800771d 100644
> --- a/drivers/net/iavf/iavf_ethdev.c
> +++ b/drivers/net/iavf/iavf_ethdev.c
> @@ -612,7 +612,7 @@ static int iavf_config_rx_queues_irqs(struct
> rte_eth_dev *dev,
>  			/* If Rx interrupt is reuquired, and we can use
>  			 * multi interrupts, then the vec is from 1
>  			 */
> -			vf->nb_msix = RTE_MIN(vf->vf_res->max_vectors,
> +			vf->nb_msix = RTE_MIN(vf->vf_res->max_vectors - 1,
>  					      intr_handle->nb_efd);
>  			vf->msix_base = IAVF_RX_VEC_START;
>  			vec = IAVF_RX_VEC_START;
> @@ -620,7 +620,7 @@ static int iavf_config_rx_queues_irqs(struct
> rte_eth_dev *dev,
>  				qv_map[i].queue_id = i;
>  				qv_map[i].vector_id = vec;
>  				intr_handle->intr_vec[i] = vec++;
> -				if (vec >= vf->nb_msix)
> +				if (vec >= vf->nb_msix + IAVF_RX_VEC_START)
>  					vec = IAVF_RX_VEC_START;
>  			}
>  			vf->qv_map = qv_map;
> --
> 2.21.1

Acked-by: Beilei Xing <beilei.xing at intel.com>