[dpdk-stable] [dpdk-dev] [PATCH] net/bonding: fix create bonded device test failure

[Chas Williams]

On 1/7/19 8:01 AM, Hari Kumar Vemula wrote:
> Create bonded device test is failing due to improper initialisation in
> bonded device configuration. which leads to crash while setting up queues.
> 
> The value of nb_rx_desc is checked if it is not in range of rx_desc_lim of
> bonded device which fails.
> This is due to "rx_desc_lim" is set to 0 as default value of bonded device
> during bond_alloc().
> Hence nb_rx_desc (1024) is > 0 and test fails.
> 
> Fix is to set the default values of rx_desc_lim of bonded device to
> appropriate value.

The default values for the bond device aren't known until the first
slave is added.  Can you explain your setup?  What PMD are you
using for testing?

> 
> Fixes: 2efb58cbab ("bond: new link bonding library")
> Cc: stable at dpdk.org
> 
> Signed-off-by: Hari Kumar Vemula <hari.kumarx.vemula at intel.com>
> ---
>   drivers/net/bonding/rte_eth_bond_pmd.c | 11 +++++++----
>   1 file changed, 7 insertions(+), 4 deletions(-)
> 
> diff --git a/drivers/net/bonding/rte_eth_bond_pmd.c b/drivers/net/bonding/rte_eth_bond_pmd.c
> index 44deaf119..e0888e960 100644
> --- a/drivers/net/bonding/rte_eth_bond_pmd.c
> +++ b/drivers/net/bonding/rte_eth_bond_pmd.c
> @@ -2225,6 +2225,11 @@ static void
>   bond_ethdev_info(struct rte_eth_dev *dev, struct rte_eth_dev_info *dev_info)
>   {
>   	struct bond_dev_private *internals = dev->data->dev_private;
> +	struct rte_eth_desc_lim bond_lim = {
> +		.nb_max = UINT16_MAX,
> +		.nb_min = 0,
> +		.nb_align = 1,
> +	};
>   
>   	uint16_t max_nb_rx_queues = UINT16_MAX;
>   	uint16_t max_nb_tx_queues = UINT16_MAX;
> @@ -2263,10 +2268,8 @@ bond_ethdev_info(struct rte_eth_dev *dev, struct rte_eth_dev_info *dev_info)
>   	memcpy(&dev_info->default_txconf, &internals->default_txconf,
>   	       sizeof(dev_info->default_txconf));
>   
> -	memcpy(&dev_info->rx_desc_lim, &internals->rx_desc_lim,
> -	       sizeof(dev_info->rx_desc_lim));
> -	memcpy(&dev_info->tx_desc_lim, &internals->tx_desc_lim,
> -	       sizeof(dev_info->tx_desc_lim));
> +	dev_info->rx_desc_lim = bond_lim;
> +	dev_info->tx_desc_lim = bond_lim;
>   
>   	/**
>   	 * If dedicated hw queues enabled for link bonding device in LACP mode
>