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To: Thomas Monjalon <thomas@monjalon.net>, dev@dpdk.org
Cc: ferruh.yigit@intel.com, arybchenko@solarflare.com,
Rosen Xu <rosen.xu@intel.com>, Stephen Hemminger <sthemmin@microsoft.com>,
"K. Y. Srinivasan" <kys@microsoft.com>,
Haiyang Zhang <haiyangz@microsoft.com>, Long Li <longli@microsoft.com>,
Heinrich Kuhn <heinrich.kuhn@netronome.com>,
Gagandeep Singh <g.singh@nxp.com>, Akhil Goyal <akhil.goyal@nxp.com>,
Martin Spinler <spinler@cesnet.cz>,
Anatoly Burakov <anatoly.burakov@intel.com>
References: <20200913220711.3768597-1-thomas@monjalon.net>
<20200927234249.3198780-1-thomas@monjalon.net>
<20200927234249.3198780-19-thomas@monjalon.net>
From: "Sachin Saxena (OSS)" <sachin.saxena@oss.nxp.com>
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Subject: Re: [dpdk-dev] [PATCH v2 18/25] drivers/net: accept removing device
without any port
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Sender: "dev" <dev-bounces@dpdk.org>
For "net/pfe"
Reviewed-by: Sachin Saxena<sachin.saxena@oss.nxp.com>
On 28-Sep-20 5:12 AM, Thomas Monjalon wrote:
> The ports can be closed (i.e. completely released)
> before removing the whole device.
> Such case was wrongly considered an error by some drivers.
>
> If the device supports only one port, there is nothing much
> to free after the port is closed.
>
> Signed-off-by: Thomas Monjalon <thomas@monjalon.net>
> Reviewed-by: Ferruh Yigit <ferruh.yigit@intel.com>
> Reviewed-by: Rosen Xu <rosen.xu@intel.com>
> ---
> drivers/net/ipn3ke/ipn3ke_ethdev.c | 6 ++----
> drivers/net/kni/rte_eth_kni.c | 16 +++++++---------
> drivers/net/netvsc/hn_ethdev.c | 2 +-
> drivers/net/nfp/nfp_net.c | 2 ++
> drivers/net/pfe/pfe_ethdev.c | 6 ++----
> drivers/net/szedata2/rte_eth_szedata2.c | 6 ++----
> 6 files changed, 16 insertions(+), 22 deletions(-)
>
> diff --git a/drivers/net/ipn3ke/ipn3ke_ethdev.c b/drivers/net/ipn3ke/ipn3ke_ethdev.c
> index 027be29bd8..4446d2af9e 100644
> --- a/drivers/net/ipn3ke/ipn3ke_ethdev.c
> +++ b/drivers/net/ipn3ke/ipn3ke_ethdev.c
> @@ -562,10 +562,8 @@ static int ipn3ke_vswitch_remove(struct rte_afu_device *afu_dev)
> afu_dev->device.name, i);
>
> ethdev = rte_eth_dev_allocated(afu_dev->device.name);
> - if (!ethdev)
> - return -ENODEV;
> -
> - rte_eth_dev_destroy(ethdev, ipn3ke_rpst_uninit);
> + if (ethdev != NULL)
> + rte_eth_dev_destroy(ethdev, ipn3ke_rpst_uninit);
> }
>
> ret = rte_eth_switch_domain_free(hw->switch_domain_id);
> diff --git a/drivers/net/kni/rte_eth_kni.c b/drivers/net/kni/rte_eth_kni.c
> index 45ab1b17a8..2a4058f7b0 100644
> --- a/drivers/net/kni/rte_eth_kni.c
> +++ b/drivers/net/kni/rte_eth_kni.c
> @@ -488,17 +488,15 @@ eth_kni_remove(struct rte_vdev_device *vdev)
>
> /* find the ethdev entry */
> eth_dev = rte_eth_dev_allocated(name);
> - if (eth_dev == NULL)
> - return -1;
> -
> - if (rte_eal_process_type() != RTE_PROC_PRIMARY) {
> - eth_kni_dev_stop(eth_dev);
> - return rte_eth_dev_release_port(eth_dev);
> + if (eth_dev != NULL) {
> + if (rte_eal_process_type() != RTE_PROC_PRIMARY) {
> + eth_kni_dev_stop(eth_dev);
> + return rte_eth_dev_release_port(eth_dev);
> + }
> + eth_kni_close(eth_dev);
> + rte_eth_dev_release_port(eth_dev);
> }
>
> - eth_kni_close(eth_dev);
> - rte_eth_dev_release_port(eth_dev);
> -
> is_kni_initialized--;
> if (is_kni_initialized == 0)
> rte_kni_close();
> diff --git a/drivers/net/netvsc/hn_ethdev.c b/drivers/net/netvsc/hn_ethdev.c
> index 15d6e9762d..19a9eb6bc2 100644
> --- a/drivers/net/netvsc/hn_ethdev.c
> +++ b/drivers/net/netvsc/hn_ethdev.c
> @@ -1092,7 +1092,7 @@ static int eth_hn_remove(struct rte_vmbus_device *dev)
>
> eth_dev = rte_eth_dev_allocated(dev->device.name);
> if (!eth_dev)
> - return -ENODEV;
> + return 0; /* port already released */
>
> ret = eth_hn_dev_uninit(eth_dev);
> if (ret)
> diff --git a/drivers/net/nfp/nfp_net.c b/drivers/net/nfp/nfp_net.c
> index 9509dc8bd6..ce25cf1ed4 100644
> --- a/drivers/net/nfp/nfp_net.c
> +++ b/drivers/net/nfp/nfp_net.c
> @@ -3739,6 +3739,8 @@ static int eth_nfp_pci_remove(struct rte_pci_device *pci_dev)
> int port = 0;
>
> eth_dev = rte_eth_dev_allocated(pci_dev->device.name);
> + if (eth_dev == NULL)
> + return 0; /* port already released */
> if ((pci_dev->id.device_id == PCI_DEVICE_ID_NFP4000_PF_NIC) ||
> (pci_dev->id.device_id == PCI_DEVICE_ID_NFP6000_PF_NIC)) {
> port = get_pf_port_number(eth_dev->data->name);
> diff --git a/drivers/net/pfe/pfe_ethdev.c b/drivers/net/pfe/pfe_ethdev.c
> index 187a0019ff..9d5415d9b1 100644
> --- a/drivers/net/pfe/pfe_ethdev.c
> +++ b/drivers/net/pfe/pfe_ethdev.c
> @@ -1155,10 +1155,8 @@ pmd_pfe_remove(struct rte_vdev_device *vdev)
> return 0;
>
> eth_dev = rte_eth_dev_allocated(name);
> - if (eth_dev == NULL)
> - return -ENODEV;
> -
> - pfe_eth_exit(eth_dev, g_pfe);
> + if (eth_dev != NULL)
> + pfe_eth_exit(eth_dev, g_pfe);
> munmap(g_pfe->cbus_baseaddr, g_pfe->cbus_size);
>
> if (g_pfe->nb_devs == 0) {
> diff --git a/drivers/net/szedata2/rte_eth_szedata2.c b/drivers/net/szedata2/rte_eth_szedata2.c
> index 4325b9a30d..5f589dfa4c 100644
> --- a/drivers/net/szedata2/rte_eth_szedata2.c
> +++ b/drivers/net/szedata2/rte_eth_szedata2.c
> @@ -1910,10 +1910,8 @@ static int szedata2_eth_pci_remove(struct rte_pci_device *pci_dev)
> pci_dev->device.name, i);
> PMD_DRV_LOG(DEBUG, "Removing eth_dev %s", name);
> eth_dev = rte_eth_dev_allocated(name);
> - if (!eth_dev) {
> - PMD_DRV_LOG(ERR, "eth_dev %s not found", name);
> - retval = retval ? retval : -ENODEV;
> - }
> + if (eth_dev == NULL)
> + continue; /* port already released */
>
> ret = rte_szedata2_eth_dev_uninit(eth_dev);
> if (ret != 0) {