Mesh on ath10k drops all packets

[Jeroen Roovers]

Jan 22 11:34:21 wim kernel: wlan0: TBTT : max clockdrift=0; too small to adjust
Jan 22 11:34:22 wim kernel: wlan0: STA 40:e2:30:cb:9a:11 : offset was
invalid, t_offset=1712128384
Jan 22 11:34:22 wim kernel: wlan0: TBTT : max clockdrift=0; too small to adjust
Jan 22 11:34:23 wim kernel: wlan0: STA 40:e2:30:cb:9a:11 : is adjusting TBTT
Jan 22 11:34:23 wim kernel: wlan0: TBTT : max clockdrift=0; too small to adjust
Jan 22 11:34:24 wim kernel: wlan0: STA 40:e2:30:cb:9a:11 : offset was
invalid, t_offset=1714176384
Jan 22 11:34:24 wim kernel: wlan0: TBTT : max clockdrift=0; too small to adjust
Jan 22 11:34:25 wim kernel: wlan0: STA 40:e2:30:cb:9a:11 :
t_offset=1715200384, t_offset_setpoint=1714176364,
t_clockdrift=-1024020
Jan 22 11:34:25 wim kernel: wlan0: STA 40:e2:30:cb:9a:11 :
t_clockdrift=-1024020 too large, setpoint reset
Jan 22 11:34:25 wim kernel: wlan0: TBTT : max clockdrift=0; too small to adjust
Jan 22 11:34:26 wim kernel: wlan0: STA 40:e2:30:cb:9a:11 : is adjusting TBTT
Jan 22 11:34:26 wim kernel: wlan0: TBTT : max clockdrift=0; too small to adjust
Jan 22 11:34:27 wim kernel: wlan0: STA 40:e2:30:cb:9a:11 : offset was
invalid, t_offset=1717248384
Jan 22 11:34:27 wim kernel: wlan0: TBTT : max clockdrift=0; too small to adjust
Jan 22 11:34:28 wim kernel: wlan0: STA 40:e2:30:cb:9a:11 :
t_offset=1718272384, t_offset_setpoint=1717248364,
t_clockdrift=-1024020
Jan 22 11:34:28 wim kernel: wlan0: STA 40:e2:30:cb:9a:11 :
t_clockdrift=-1024020 too large, setpoint reset
Jan 22 11:34:28 wim kernel: wlan0: TBTT : max clockdrift=0; too small to adjust
Jan 22 11:34:29 wim kernel: wlan0: STA 40:e2:30:cb:9a:11 : offset was
invalid, t_offset=1719296384

I seem to be able to get an RSN mesh going using wpa_supplicant, but
the ath10k sees only its own packets in tcpdump while the ath9k on the
other side sees everything.

Kernel is 4.4.0. Firmware is 10.2.4.70.17-2.