tree d5f655ead66668eed117707b102d3b2bdc32c3e8
parent e40abaf49918a9b546f527824962ee0dc602751c
author Marty Faltesek <mfaltesek@google.com> 1440532125 -0400
committer Marty Faltesek <mfaltesek@google.com> 1440544295 -0400

mac80211: Do not send rc updates to driver before it's initialized station.

This prevents a race condition where the driver may receive updates before it's
fininished initialzing.

b/22846486

See upstream discussion at:

http://comments.gmane.org/gmane.linux.kernel.wireless.general/141276.

To reproduce, I added udelay(1000) in sta_info_insert_finish() before calling
sta_info_insert_drv_state(). Then if I run two scripts below on the client,
I can reproduce in seconds without the patch. With the patch it no longer
fails.

while :; do
  iw wlan0 connect <SSID>
  sleep 0.1
  iw wlan0 disconnect
  sleep 0.1
done

while :; do
  iw dev wlan0 set power_save off
  iw dev wlan0 set power_save on
done

Change-Id: I322e70470f5969cce657f26b8a0ebbd6b0670c6a