[PATCH v2] net/af_xdp: allow operation when multiprocess is disabled

[Loftus, Ciara]

> Subject: [PATCH v2] net/af_xdp: allow operation when multiprocess is
> disabled
> 
> If EAL multiprocess feature has been disabled via rte_mp_disable()
> function, AF_XDP driver may not be able to register its IPC callback.
> Previously this leads to probe failure.
> This commit adds a check for this condition so that AF_XDP can still be
> used even if multiprocess is disabled.
> 
> Fixes: 9876cf8316b3 ("net/af_xdp: re-enable secondary process support")
> 
> Signed-off-by: Junxiao Shi <git at mail1.yoursunny.com>

Thanks for the patch!

Acked-by: Ciara Loftus <ciara.loftus at intel.com>

> ---
>  drivers/net/af_xdp/rte_eth_af_xdp.c | 2 +-
>  1 file changed, 1 insertion(+), 1 deletion(-)
> 
> diff --git a/drivers/net/af_xdp/rte_eth_af_xdp.c
> b/drivers/net/af_xdp/rte_eth_af_xdp.c
> index 6ac710c6bd..2163df7c5c 100644
> --- a/drivers/net/af_xdp/rte_eth_af_xdp.c
> +++ b/drivers/net/af_xdp/rte_eth_af_xdp.c
> @@ -1995,7 +1995,7 @@ rte_pmd_af_xdp_probe(struct rte_vdev_device
> *dev)
>  	/* Register IPC callback which shares xsk fds from primary to
> secondary */
>  	if (!afxdp_dev_count) {
>  		ret = rte_mp_action_register(ETH_AF_XDP_MP_KEY,
> afxdp_mp_send_fds);
> -		if (ret < 0) {
> +		if (ret < 0 && rte_errno != ENOTSUP) {
>  			AF_XDP_LOG(ERR, "%s: Failed to register multi-
> process IPC callback: %s",
>  				   name, strerror(rte_errno));
>  			return -1;
> --
> 2.17.1