[PATCH net-next 0/5] net: wangxun: improve statistics support

[PATCH net-next 0/5] net: wangxun: improve statistics support

[Mengyuan Lou]

This series improves statistics support for Wangxun drivers.
Currently, VF drivers do not periodically refresh software statistics,
do not expose per-queue statistics through the generic netdev statistics
interface, and do not provide ndo_get_stats64().
The first patch fixes the suspend/resume flow for wxvf so the service
task and device lifecycle are handled correctly. The second patch makes
wx_update_stats() safe for VF drivers by allowing it to cope with
temporarily missing queue pointers during queue reconfiguration.
Once periodic statistics updates are available, libwx can implement
netdev_stat_ops, allowing Wangxun drivers to expose standard per-queue
statistics through the generic netdev qstats infrastructure.

Finally, VF drivers register ndo_get_stats64() so standard interface
statistics are also available.

Mengyuan Lou (5):
  net: libwx: fix suspend/resume for wxvf
  net: libwx: enable wx_update_stats for VF drivers
  net: libwx: Add per queue netdev-genl stats apis
  net: Wangxun: add support for basic qstats
  net: wangxun: add ndo_get_stats64 support

 drivers/net/ethernet/wangxun/libwx/wx_hw.c    |  8 +++
 drivers/net/ethernet/wangxun/libwx/wx_lib.c   | 51 +++++++++++++++++++
 drivers/net/ethernet/wangxun/libwx/wx_lib.h   |  1 +
 .../net/ethernet/wangxun/libwx/wx_vf_common.c | 23 ++++++++-
 drivers/net/ethernet/wangxun/ngbe/ngbe_main.c |  1 +
 .../net/ethernet/wangxun/ngbevf/ngbevf_main.c |  2 +
 .../net/ethernet/wangxun/txgbe/txgbe_main.c   |  1 +
 .../ethernet/wangxun/txgbevf/txgbevf_main.c   |  2 +
 8 files changed, 87 insertions(+), 2 deletions(-)

-- 
2.30.1

[PATCH net-next 1/5] net: libwx: fix suspend/resume for wxvf

[Mengyuan Lou]

Fix the suspend/resume sequence by:
* protecting the open/close path with RTNL,
* closing the netdev before releasing interrupt resources,
* re-enabling the PCI device and restoring bus mastering during resume,
* rebuilding the interrupt scheme, and
* reopening the interface when it was running before suspend.

Signed-off-by: Mengyuan Lou <mengyuanlou@net-swift.com>
---
 .../net/ethernet/wangxun/libwx/wx_vf_common.c | 21 +++++++++++++++++--
 1 file changed, 19 insertions(+), 2 deletions(-)

diff --git a/drivers/net/ethernet/wangxun/libwx/wx_vf_common.c b/drivers/net/ethernet/wangxun/libwx/wx_vf_common.c
index 26de78e9a69e..e8448783df3e 100644
--- a/drivers/net/ethernet/wangxun/libwx/wx_vf_common.c
+++ b/drivers/net/ethernet/wangxun/libwx/wx_vf_common.c
@@ -16,9 +16,13 @@ int wxvf_suspend(struct device *dev_d)
 	struct pci_dev *pdev = to_pci_dev(dev_d);
 	struct wx *wx = pci_get_drvdata(pdev);
 
+	rtnl_lock();
 	netif_device_detach(wx->netdev);
+	if (netif_running(wx->netdev))
+		wxvf_close(wx->netdev);
 	wx_clear_interrupt_scheme(wx);
 	pci_disable_device(pdev);
+	rtnl_unlock();
 
 	return 0;
 }
@@ -34,12 +38,25 @@ int wxvf_resume(struct device *dev_d)
 {
 	struct pci_dev *pdev = to_pci_dev(dev_d);
 	struct wx *wx = pci_get_drvdata(pdev);
+	int err = 0;
+
+	err = pci_enable_device_mem(pdev);
+	if (err) {
+		dev_err(&pdev->dev, "Cannot enable PCI device from suspend\n");
+		return err;
+	}
 
 	pci_set_master(pdev);
-	wx_init_interrupt_scheme(wx);
+	rtnl_lock();
+	err = wx_init_interrupt_scheme(wx);
+	if (!err && netif_running(wx->netdev))
+		err = wxvf_open(wx->netdev);
+	rtnl_unlock();
+	if (err)
+		return err;
 	netif_device_attach(wx->netdev);
 
-	return 0;
+	return err;
 }
 EXPORT_SYMBOL(wxvf_resume);
 
-- 
2.30.1

Re: [PATCH net-next 1/5] net: libwx: fix suspend/resume for wxvf

[Breno Leitao]

On Fri, Jul 31, 2026 at 03:49:54PM +0800, Mengyuan Lou wrote:
> Fix the suspend/resume sequence by:
> * protecting the open/close path with RTNL,
> * closing the netdev before releasing interrupt resources,
> * re-enabling the PCI device and restoring bus mastering during resume,
> * rebuilding the interrupt scheme, and
> * reopening the interface when it was running before suspend.
> 
> Signed-off-by: Mengyuan Lou <mengyuanlou@net-swift.com>
> ---
>  .../net/ethernet/wangxun/libwx/wx_vf_common.c | 21 +++++++++++++++++--
>  1 file changed, 19 insertions(+), 2 deletions(-)
> 
> diff --git a/drivers/net/ethernet/wangxun/libwx/wx_vf_common.c b/drivers/net/ethernet/wangxun/libwx/wx_vf_common.c
> index 26de78e9a69e..e8448783df3e 100644
> --- a/drivers/net/ethernet/wangxun/libwx/wx_vf_common.c
> +++ b/drivers/net/ethernet/wangxun/libwx/wx_vf_common.c
> @@ -16,9 +16,13 @@ int wxvf_suspend(struct device *dev_d)
>  	struct pci_dev *pdev = to_pci_dev(dev_d);
>  	struct wx *wx = pci_get_drvdata(pdev);
>  
> +	rtnl_lock();
>  	netif_device_detach(wx->netdev);
> +	if (netif_running(wx->netdev))
> +		wxvf_close(wx->netdev);
>  	wx_clear_interrupt_scheme(wx);
>  	pci_disable_device(pdev);
> +	rtnl_unlock();

Why not before pci_disable_device()?

>  	return 0;
>  }
> @@ -34,12 +38,25 @@ int wxvf_resume(struct device *dev_d)
>  {
>  	struct pci_dev *pdev = to_pci_dev(dev_d);
>  	struct wx *wx = pci_get_drvdata(pdev);
> +	int err = 0;

Nit: You don't need =0 here.

otherwise looks good.
--breno

[PATCH net-next 2/5] net: libwx: enable wx_update_stats for VF drivers

[Mengyuan Lou]

Make wx_update_stats() safe for VF drivers. The helper
iterates over all ring pointers, but some entries may be NULL after queue
reconfiguration, so skip missing rings.

With these changes, the VF service task can safely invoke
wx_update_stats() periodically to keep the software statistics
up-to-date.

Signed-off-by: Mengyuan Lou <mengyuanlou@net-swift.com>
---
 drivers/net/ethernet/wangxun/libwx/wx_hw.c        | 8 ++++++++
 drivers/net/ethernet/wangxun/libwx/wx_vf_common.c | 2 ++
 2 files changed, 10 insertions(+)

diff --git a/drivers/net/ethernet/wangxun/libwx/wx_hw.c b/drivers/net/ethernet/wangxun/libwx/wx_hw.c
index 260e14d5d541..349afbe60132 100644
--- a/drivers/net/ethernet/wangxun/libwx/wx_hw.c
+++ b/drivers/net/ethernet/wangxun/libwx/wx_hw.c
@@ -2886,6 +2886,8 @@ void wx_update_stats(struct wx *wx)
 	for (i = 0; i < wx->num_rx_queues; i++) {
 		struct wx_ring *rx_ring = wx->rx_ring[i];
 
+		if (!rx_ring)
+			continue;
 		non_eop_descs += rx_ring->rx_stats.non_eop_descs;
 		alloc_rx_buff_failed += rx_ring->rx_stats.alloc_rx_buff_failed;
 		hw_csum_rx_good += rx_ring->rx_stats.csum_good_cnt;
@@ -2911,12 +2913,17 @@ void wx_update_stats(struct wx *wx)
 	for (i = 0; i < wx->num_tx_queues; i++) {
 		struct wx_ring *tx_ring = wx->tx_ring[i];
 
+		if (!tx_ring)
+			continue;
 		restart_queue += tx_ring->tx_stats.restart_queue;
 		tx_busy += tx_ring->tx_stats.tx_busy;
 	}
 	wx->restart_queue = restart_queue;
 	wx->tx_busy = tx_busy;
 
+	if (wx->pdev->is_virtfn)
+		goto skip_hw_stats;
+
 	wx_update_xoff_rx_lfc(wx);
 
 	hwstats->gprc += rd32(wx, WX_RDM_PKT_CNT);
@@ -2956,6 +2963,7 @@ void wx_update_stats(struct wx *wx)
 		hwstats->qmprc += rd32_wrap(wx, WX_PX_MPRC(i),
 					    &wx->last_stats.qmprc[i]);
 
+skip_hw_stats:
 	spin_unlock(&wx->hw_stats_lock);
 }
 EXPORT_SYMBOL(wx_update_stats);
diff --git a/drivers/net/ethernet/wangxun/libwx/wx_vf_common.c b/drivers/net/ethernet/wangxun/libwx/wx_vf_common.c
index e8448783df3e..f116677fb9df 100644
--- a/drivers/net/ethernet/wangxun/libwx/wx_vf_common.c
+++ b/drivers/net/ethernet/wangxun/libwx/wx_vf_common.c
@@ -5,6 +5,7 @@
 #include <linux/pci.h>
 
 #include "wx_type.h"
+#include "wx_hw.h"
 #include "wx_mbx.h"
 #include "wx_lib.h"
 #include "wx_vf.h"
@@ -426,6 +427,7 @@ static void wxvf_service_task(struct work_struct *work)
 
 	wxvf_link_config_subtask(wx);
 	wxvf_reset_subtask(wx);
+	wx_update_stats(wx);
 	wx_service_event_complete(wx);
 }
 
-- 
2.30.1

[PATCH net-next 3/5] net: libwx: Add per queue netdev-genl stats apis

[Mengyuan Lou]

Implement netdev_stat_ops for libwx devices to support the generic
netdev queue statistics interface.

Signed-off-by: Mengyuan Lou <mengyuanlou@net-swift.com>
---
 drivers/net/ethernet/wangxun/libwx/wx_lib.c | 49 +++++++++++++++++++++
 drivers/net/ethernet/wangxun/libwx/wx_lib.h |  1 +
 2 files changed, 50 insertions(+)

diff --git a/drivers/net/ethernet/wangxun/libwx/wx_lib.c b/drivers/net/ethernet/wangxun/libwx/wx_lib.c
index 31572f59b9ce..ae20733c703d 100644
--- a/drivers/net/ethernet/wangxun/libwx/wx_lib.c
+++ b/drivers/net/ethernet/wangxun/libwx/wx_lib.c
@@ -5,6 +5,7 @@
 #include <net/ip6_checksum.h>
 #include <net/page_pool/helpers.h>
 #include <net/inet_ecn.h>
+#include <net/netdev_queues.h>
 #include <linux/workqueue.h>
 #include <linux/iopoll.h>
 #include <linux/sctp.h>
@@ -3100,6 +3101,54 @@ void wx_get_stats64(struct net_device *netdev,
 }
 EXPORT_SYMBOL(wx_get_stats64);
 
+static void wx_get_queue_stats_rx(struct net_device *dev, int idx,
+				  struct netdev_queue_stats_rx *stats)
+{
+	struct wx *wx = netdev_priv(dev);
+	struct wx_ring *ring = wx->rx_ring[idx];
+
+	stats->packets = ring->stats.packets;
+	stats->bytes = ring->stats.bytes;
+	stats->alloc_fail = wx->alloc_rx_buff_failed;
+	stats->csum_complete = wx->hw_csum_rx_good;
+	stats->csum_bad = wx->hw_csum_rx_error;
+}
+
+static void wx_get_queue_stats_tx(struct net_device *dev, int idx,
+				  struct netdev_queue_stats_tx *stats)
+{
+	struct wx *wx = netdev_priv(dev);
+	struct wx_ring *ring = wx->tx_ring[idx];
+
+	stats->packets = ring->stats.packets;
+	stats->bytes = ring->stats.bytes;
+}
+
+static void wx_get_base_stats(struct net_device *dev,
+			      struct netdev_queue_stats_rx *rx,
+			      struct netdev_queue_stats_tx *tx)
+{
+	rx->bytes = 0;
+	rx->packets = 0;
+	rx->alloc_fail = 0;
+	rx->csum_complete = 0;
+	rx->csum_bad = 0;
+	tx->bytes = 0;
+	tx->packets = 0;
+}
+
+static const struct netdev_stat_ops wx_stat_ops = {
+	.get_queue_stats_rx  = wx_get_queue_stats_rx,
+	.get_queue_stats_tx  = wx_get_queue_stats_tx,
+	.get_base_stats      = wx_get_base_stats,
+};
+
+void wx_set_stat_ops(struct net_device *netdev)
+{
+	netdev->stat_ops = &wx_stat_ops;
+}
+EXPORT_SYMBOL(wx_set_stat_ops);
+
 int wx_set_features(struct net_device *netdev, netdev_features_t features)
 {
 	netdev_features_t changed = netdev->features ^ features;
diff --git a/drivers/net/ethernet/wangxun/libwx/wx_lib.h b/drivers/net/ethernet/wangxun/libwx/wx_lib.h
index bc671786978e..cf6dd74fef87 100644
--- a/drivers/net/ethernet/wangxun/libwx/wx_lib.h
+++ b/drivers/net/ethernet/wangxun/libwx/wx_lib.h
@@ -30,6 +30,7 @@ void wx_free_resources(struct wx *wx);
 int wx_setup_resources(struct wx *wx);
 void wx_get_stats64(struct net_device *netdev,
 		    struct rtnl_link_stats64 *stats);
+void wx_set_stat_ops(struct net_device *netdev);
 int wx_set_features(struct net_device *netdev, netdev_features_t features);
 netdev_features_t wx_fix_features(struct net_device *netdev,
 				  netdev_features_t features);
-- 
2.30.1

[PATCH net-next 4/5] net: Wangxun: add support for basic qstats

[Mengyuan Lou]

Implement netdev_stat_ops and export the basic per-queue stats
for ngbe, ngbevf, txgbe and txgbevf.
This allows to report per-queue statistics through
the standard networking infrastructure, making them available via
interfaces such as the qstats-get Netlink API.

Signed-off-by: Mengyuan Lou <mengyuanlou@net-swift.com>
---
 drivers/net/ethernet/wangxun/ngbe/ngbe_main.c       | 1 +
 drivers/net/ethernet/wangxun/ngbevf/ngbevf_main.c   | 1 +
 drivers/net/ethernet/wangxun/txgbe/txgbe_main.c     | 1 +
 drivers/net/ethernet/wangxun/txgbevf/txgbevf_main.c | 1 +
 4 files changed, 4 insertions(+)

diff --git a/drivers/net/ethernet/wangxun/ngbe/ngbe_main.c b/drivers/net/ethernet/wangxun/ngbe/ngbe_main.c
index a16221995909..d965f7af1697 100644
--- a/drivers/net/ethernet/wangxun/ngbe/ngbe_main.c
+++ b/drivers/net/ethernet/wangxun/ngbe/ngbe_main.c
@@ -700,6 +700,7 @@ static int ngbe_probe(struct pci_dev *pdev,
 	wx->driver_name = ngbe_driver_name;
 	ngbe_set_ethtool_ops(netdev);
 	netdev->netdev_ops = &ngbe_netdev_ops;
+	wx_set_stat_ops(netdev);
 
 	netdev->features = NETIF_F_SG | NETIF_F_IP_CSUM |
 			   NETIF_F_TSO | NETIF_F_TSO6 |
diff --git a/drivers/net/ethernet/wangxun/ngbevf/ngbevf_main.c b/drivers/net/ethernet/wangxun/ngbevf/ngbevf_main.c
index d79cf8d8484f..b6bab050837a 100644
--- a/drivers/net/ethernet/wangxun/ngbevf/ngbevf_main.c
+++ b/drivers/net/ethernet/wangxun/ngbevf/ngbevf_main.c
@@ -190,6 +190,7 @@ static int ngbevf_probe(struct pci_dev *pdev,
 	wx->driver_name = KBUILD_MODNAME;
 	wx_set_ethtool_ops_vf(netdev);
 	netdev->netdev_ops = &ngbevf_netdev_ops;
+	wx_set_stat_ops(netdev);
 
 	/* setup the private structure */
 	err = ngbevf_sw_init(wx);
diff --git a/drivers/net/ethernet/wangxun/txgbe/txgbe_main.c b/drivers/net/ethernet/wangxun/txgbe/txgbe_main.c
index c277863baf67..7f3d72e53fd3 100644
--- a/drivers/net/ethernet/wangxun/txgbe/txgbe_main.c
+++ b/drivers/net/ethernet/wangxun/txgbe/txgbe_main.c
@@ -745,6 +745,7 @@ static int txgbe_probe(struct pci_dev *pdev,
 	wx->driver_name = txgbe_driver_name;
 	txgbe_set_ethtool_ops(netdev);
 	netdev->netdev_ops = &txgbe_netdev_ops;
+	wx_set_stat_ops(netdev);
 	netdev->udp_tunnel_nic_info = &txgbe_udp_tunnels;
 
 	/* setup the private structure */
diff --git a/drivers/net/ethernet/wangxun/txgbevf/txgbevf_main.c b/drivers/net/ethernet/wangxun/txgbevf/txgbevf_main.c
index 8b16b900820a..2dd119bd52e5 100644
--- a/drivers/net/ethernet/wangxun/txgbevf/txgbevf_main.c
+++ b/drivers/net/ethernet/wangxun/txgbevf/txgbevf_main.c
@@ -255,6 +255,7 @@ static int txgbevf_probe(struct pci_dev *pdev,
 	wx->driver_name = KBUILD_MODNAME;
 	wx_set_ethtool_ops_vf(netdev);
 	netdev->netdev_ops = &txgbevf_netdev_ops;
+	wx_set_stat_ops(netdev);
 
 	/* setup the private structure */
 	err = txgbevf_sw_init(wx);
-- 
2.30.1

[PATCH net-next 5/5] net: wangxun: add ndo_get_stats64 support

[Mengyuan Lou]

Expose network statistics for Wangxun VF drivers by registering the
ndo_get_stats64 callback.

Signed-off-by: Mengyuan Lou <mengyuanlou@net-swift.com>
---
 drivers/net/ethernet/wangxun/libwx/wx_lib.c         | 2 ++
 drivers/net/ethernet/wangxun/ngbevf/ngbevf_main.c   | 1 +
 drivers/net/ethernet/wangxun/txgbevf/txgbevf_main.c | 1 +
 3 files changed, 4 insertions(+)

diff --git a/drivers/net/ethernet/wangxun/libwx/wx_lib.c b/drivers/net/ethernet/wangxun/libwx/wx_lib.c
index ae20733c703d..a4ca01c18c6a 100644
--- a/drivers/net/ethernet/wangxun/libwx/wx_lib.c
+++ b/drivers/net/ethernet/wangxun/libwx/wx_lib.c
@@ -3092,6 +3092,8 @@ void wx_get_stats64(struct net_device *netdev,
 	}
 
 	rcu_read_unlock();
+	if (wx->pdev->is_virtfn)
+		return;
 
 	hwstats = &wx->stats;
 	stats->rx_errors = hwstats->crcerrs + hwstats->rlec;
diff --git a/drivers/net/ethernet/wangxun/ngbevf/ngbevf_main.c b/drivers/net/ethernet/wangxun/ngbevf/ngbevf_main.c
index b6bab050837a..b4817c58992b 100644
--- a/drivers/net/ethernet/wangxun/ngbevf/ngbevf_main.c
+++ b/drivers/net/ethernet/wangxun/ngbevf/ngbevf_main.c
@@ -48,6 +48,7 @@ static const struct net_device_ops ngbevf_netdev_ops = {
 	.ndo_start_xmit         = wx_xmit_frame,
 	.ndo_validate_addr      = eth_validate_addr,
 	.ndo_set_mac_address    = wx_set_mac_vf,
+	.ndo_get_stats64        = wx_get_stats64,
 };
 
 static void ngbevf_set_num_queues(struct wx *wx)
diff --git a/drivers/net/ethernet/wangxun/txgbevf/txgbevf_main.c b/drivers/net/ethernet/wangxun/txgbevf/txgbevf_main.c
index 2dd119bd52e5..1e30d8f2183a 100644
--- a/drivers/net/ethernet/wangxun/txgbevf/txgbevf_main.c
+++ b/drivers/net/ethernet/wangxun/txgbevf/txgbevf_main.c
@@ -44,6 +44,7 @@ static const struct net_device_ops txgbevf_netdev_ops = {
 	.ndo_start_xmit         = wx_xmit_frame,
 	.ndo_validate_addr      = eth_validate_addr,
 	.ndo_set_mac_address    = wx_set_mac_vf,
+	.ndo_get_stats64        = wx_get_stats64,
 };
 
 static void txgbevf_set_num_queues(struct wx *wx)
-- 
2.30.1

Re: [PATCH net-next 5/5] net: wangxun: add ndo_get_stats64 support

[Breno Leitao]

On Fri, Jul 31, 2026 at 03:49:58PM +0800, Mengyuan Lou wrote:
> Expose network statistics for Wangxun VF drivers by registering the
> ndo_get_stats64 callback.
> 
> Signed-off-by: Mengyuan Lou <mengyuanlou@net-swift.com>
> ---
>  drivers/net/ethernet/wangxun/libwx/wx_lib.c         | 2 ++
>  drivers/net/ethernet/wangxun/ngbevf/ngbevf_main.c   | 1 +
>  drivers/net/ethernet/wangxun/txgbevf/txgbevf_main.c | 1 +
>  3 files changed, 4 insertions(+)
> 
> diff --git a/drivers/net/ethernet/wangxun/libwx/wx_lib.c b/drivers/net/ethernet/wangxun/libwx/wx_lib.c
> index ae20733c703d..a4ca01c18c6a 100644
> --- a/drivers/net/ethernet/wangxun/libwx/wx_lib.c
> +++ b/drivers/net/ethernet/wangxun/libwx/wx_lib.c
> @@ -3092,6 +3092,8 @@ void wx_get_stats64(struct net_device *netdev,
>  	}
>  
>  	rcu_read_unlock();
> +	if (wx->pdev->is_virtfn)
> +		return;

Why you don't want to populate the other entries?

Re: [PATCH net-next 5/5] net: wangxun: add ndo_get_stats64 support

[mengyuanlou]

> 2026年7月31日 16:52，Breno Leitao <leitao@debian.org> 写道：
> 
> On Fri, Jul 31, 2026 at 03:49:58PM +0800, Mengyuan Lou wrote:
>> Expose network statistics for Wangxun VF drivers by registering the
>>  callback.
>> 
>> Signed-off-by: Mengyuan Lou <mengyuanlou@net-swift.com>
>> ---
>> drivers/net/ethernet/wangxun/libwx/wx_lib.c         | 2 ++
>> drivers/net/ethernet/wangxun/ngbevf/ngbevf_main.c   | 1 +
>> drivers/net/ethernet/wangxun/txgbevf/txgbevf_main.c | 1 +
>> 3 files changed, 4 insertions(+)
>> 
>> diff --git a/drivers/net/ethernet/wangxun/libwx/wx_lib.c b/drivers/net/ethernet/wangxun/libwx/wx_lib.c
>> index ae20733c703d..a4ca01c18c6a 100644
>> --- a/drivers/net/ethernet/wangxun/libwx/wx_lib.c
>> +++ b/drivers/net/ethernet/wangxun/libwx/wx_lib.c
>> @@ -3092,6 +3092,8 @@ void wx_get_stats64(struct net_device *netdev,
>> }
>> 
>> rcu_read_unlock();
>> + if (wx->pdev->is_virtfn)
>> + return;
> 
> Why you don't want to populate the other entries?

The hardware does not provide the err counts on the vf.
> 

Re: [PATCH net-next 5/5] net: wangxun: add ndo_get_stats64 support

[Breno Leitao]

On Fri, Jul 31, 2026 at 05:41:33PM +0800, mengyuanlou@net-swift.com wrote:
> 
> 
> > 2026年7月31日 16:52，Breno Leitao <leitao@debian.org> 写道：
> > 
> > On Fri, Jul 31, 2026 at 03:49:58PM +0800, Mengyuan Lou wrote:
> >> Expose network statistics for Wangxun VF drivers by registering the
> >>  callback.
> >> 
> >> Signed-off-by: Mengyuan Lou <mengyuanlou@net-swift.com>
> >> ---
> >> drivers/net/ethernet/wangxun/libwx/wx_lib.c         | 2 ++
> >> drivers/net/ethernet/wangxun/ngbevf/ngbevf_main.c   | 1 +
> >> drivers/net/ethernet/wangxun/txgbevf/txgbevf_main.c | 1 +
> >> 3 files changed, 4 insertions(+)
> >> 
> >> diff --git a/drivers/net/ethernet/wangxun/libwx/wx_lib.c b/drivers/net/ethernet/wangxun/libwx/wx_lib.c
> >> index ae20733c703d..a4ca01c18c6a 100644
> >> --- a/drivers/net/ethernet/wangxun/libwx/wx_lib.c
> >> +++ b/drivers/net/ethernet/wangxun/libwx/wx_lib.c
> >> @@ -3092,6 +3092,8 @@ void wx_get_stats64(struct net_device *netdev,
> >> }
> >> 
> >> rcu_read_unlock();
> >> + if (wx->pdev->is_virtfn)
> >> + return;
> > 
> > Why you don't want to populate the other entries?
> 
> The hardware does not provide the err counts on the vf.

Right, but hwstats fields will be zero, right?

Does this early return buys us anything?