From: Johannes Berg <johannes.berg@intel.com>
Date: Thu, 29 Sep 2011 14:04:34 +0000 (+0200)
Subject: mac80211: send (QoS) Null if no buffered frames
X-Git-Tag: v3.2-rc1~129^2~104^2^2~22
X-Git-Url: http://git.openpandora.org/cgi-bin/gitweb.cgi?a=commitdiff_plain;h=ce662b44ce22e3e8886104d5feb2a451d7ba560f;p=pandora-kernel.git

mac80211: send (QoS) Null if no buffered frames

For PS-poll, there's a possible race between
us expiring a frame and the station polling
for it -- send it a null frame in that case.

For uAPSD, the standard says that we have to
send a frame in each SP, so send null if we
don't have any other frames.

Signed-off-by: Johannes Berg <johannes.berg@intel.com>
Signed-off-by: John W. Linville <linville@tuxdriver.com>
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