tree cb3c05420787cef15b264b35b6b8ea6936f181e3
parent 71e67c3bd127cfe7863f54e4b087eba1cc8f9a7a
author Ahmed Zaki <anzaki@gmail.com> 1572523963 -0600
committer Johannes Berg <johannes.berg@intel.com> 1573201048 +0100

mac80211: fix station inactive_time shortly after boot

In the first 5 minutes after boot (time of INITIAL_JIFFIES),
ieee80211_sta_last_active() returns zero if last_ack is zero. This
leads to "inactive time" showing jiffies_to_msecs(jiffies).

 # iw wlan0 station get fc:ec:da:64:a6:dd
 Station fc:ec:da:64:a6:dd (on wlan0)
	inactive time:	4294894049 ms
	.
	.
	connected time:	70 seconds

Fix by returning last_rx if last_ack == 0.

Signed-off-by: Ahmed Zaki <anzaki@gmail.com>
Link: https://lore.kernel.org/r/20191031121243.27694-1-anzaki@gmail.com
Signed-off-by: Johannes Berg <johannes.berg@intel.com>