Re: [dpdk-dev] [PATCH] net/af_xdp: fix failure on rte_dev_remove

[Ye Xiaolong <xiaolong.ye@intel.com>]

On 05/31, William Tu wrote:
>When users call rte_eth_dev_close() and rte_dev_remove(), the af_xdp
>pmd return -1 (EPERM) due to eth_dev == NULL.
>
>Since the af_xdp pmd driver advertises RTE_ETH_DEV_CLOSE_REMOVE, all
>the resources are freed on rte_eth_dev_close().  rte_dev_remove() tries
>to detach device and subsequently calls rte_pmd_af_xdp_remove() that tries
>to free already freed resources and fails. Fix it by return success.
>
>Fixes: f1debd77efaf6 ("net/af_xdp: introduce AF_XDP PMD")
>Reported-at: https://patchwork.ozlabs.org/patch/1106528/
>Signed-off-by: William Tu <u9012063@gmail.com>
>Suggested-by: Ilya Maximets <i.maximets@samsung.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 35c72272c919..3dcc3628c5d0 100644
>--- a/drivers/net/af_xdp/rte_eth_af_xdp.c
>+++ b/drivers/net/af_xdp/rte_eth_af_xdp.c
>@@ -944,7 +944,7 @@ rte_pmd_af_xdp_remove(struct rte_vdev_device *dev)
> 	/* find the ethdev entry */
> 	eth_dev = rte_eth_dev_allocated(rte_vdev_device_name(dev));
> 	if (eth_dev == NULL)
>-		return -1;
>+		return 0;
> 
> 	eth_dev_close(eth_dev);
> 	rte_eth_dev_release_port(eth_dev);

Looks good to me. Thanks for the fix.

Acked-by: Xiaolong Ye <xiaolong.ye@intel.com>

Thanks,
Xiaolong
>-- 
>2.7.4
>