tree 2dbd830c6d696129a3e0cec7dfa0784abed3e335
parent 2bc533bd9dcf48eaf4af6fb89a338734a9e8f76e
author Helmut Schaa <helmut.schaa@googlemail.com> 1452012133 +0100
committer Johannes Berg <johannes.berg@intel.com> 1452766221 +0100

mac80211: Don't buffer non-bufferable MMPDUs

Non-bufferable MMPDUs are sent out to STAs even while in PS mode
(for example probe responses). Applying filtered frame handling for
these doesn't seem to make much sense and will only create more
air utilization when the STA wakes up. Hence, apply filtered frame
handling only for bufferable MMPDUs.

Discovered while testing an old VOIP phone that started probing
for APs while in PS mode. The mac80211/ath9k AP where the STA is
associated would reply with a probe response but the phone sometimes
moved to a new channel already and couldn't ack the probe response
anymore. In that case mac80211 applied filtered frame handling
for the un-acked probe response.

Signed-off-by: Helmut Schaa <helmut.schaa@googlemail.com>
Signed-off-by: Johannes Berg <johannes.berg@intel.com>