[PATCH net] vlan: also check phy_driver ts_info for vlan's real device

[Hangbin Liu]

Just like function ethtool_get_ts_info(), we should also consider the
phy_driver ts_info call back. For example, driver dp83640.

Fixes: 37dd9255b2f6 ("vlan: Pass ethtool get_ts_info queries to real device.")
Acked-by: Richard Cochran <richardcoch...@gmail.com>
Signed-off-by: Hangbin Liu <liuhang...@gmail.com>
---
 net/8021q/vlan_dev.c | 6 +++++-
 1 file changed, 5 insertions(+), 1 deletion(-)

diff --git a/net/8021q/vlan_dev.c b/net/8021q/vlan_dev.c
index f7e83f6..236452e 100644
--- a/net/8021q/vlan_dev.c
+++ b/net/8021q/vlan_dev.c
@@ -29,6 +29,7 @@
 #include <linux/net_tstamp.h>
 #include <linux/etherdevice.h>
 #include <linux/ethtool.h>
+#include <linux/phy.h>
 #include <net/arp.h>
 #include <net/switchdev.h>
 
@@ -665,8 +666,11 @@ static int vlan_ethtool_get_ts_info(struct net_device *dev,
 {
        const struct vlan_dev_priv *vlan = vlan_dev_priv(dev);
        const struct ethtool_ops *ops = vlan->real_dev->ethtool_ops;
+       struct phy_device *phydev = vlan->real_dev->phydev;
 
-       if (ops->get_ts_info) {
+       if (phydev && phydev->drv && phydev->drv->ts_info) {
+                return phydev->drv->ts_info(phydev, info);
+       } else if (ops->get_ts_info) {
                return ops->get_ts_info(vlan->real_dev, info);
        } else {
                info->so_timestamping = SOF_TIMESTAMPING_RX_SOFTWARE |
-- 
2.5.5