i had this patch on ath79 trunk build but WDS still did not work between two litebeam devices. logs would show:
Thu Jun 6 14:22:19 2019 daemon.notice hostapd: wlan0: WDS-STA-INTERFACE-ADDED ifname=wlan0.sta3 sta_addr=18:e8:29:30:9b:2c
Thu Jun 6 14:22:19 2019 kern.info kernel: [179158.364689] br-lan: port 3(wlan0.sta3) entered blocking state
Thu Jun 6 14:22:19 2019 kern.info kernel: [179158.370622] br-lan: port 3(wlan0.sta3) entered listening state
Thu Jun 6 14:22:21 2019 kern.info kernel: [179160.423924] br-lan: port 3(wlan0.sta3) entered learning state
Thu Jun 6 14:22:23 2019 kern.info kernel: [179162.503896] br-lan: port 3(wlan0.sta3) entered forwarding state
Thu Jun 6 14:22:23 2019 kern.info kernel: [179162.510007] br-lan: topology change detected, propagating
Thu Jun 6 14:22:28 2019 daemon.info hostapd: wlan0: STA 18:e8:29:30:9b:2c IEEE 802.11: deauthenticated due to local deauth request
Thu Jun 6 14:22:28 2019 daemon.err hostapd: nl80211: NL80211_ATTR_STA_VLAN (addr=18:e8:29:30:9b:2c ifname=wlan0 vlan_id=0) failed: -2 (No such file or directory)
Thu Jun 6 14:22:28 2019 kern.info kernel: [179167.270133] device wlan0.sta3 left promiscuous mode
Thu Jun 6 14:22:28 2019 kern.info kernel: [179167.275350] br-lan: port 3(wlan0.sta3) entered disabled state
Thu Jun 6 14:22:28 2019 daemon.notice hostapd: wlan0: WDS-STA-INTERFACE-REMOVED ifname=wlan0.sta3 sta_addr=18:e8:29:30:9b:2c
there is a v3 on mailing list and that i'll try next after reverting v1