mac80211: use ps-poll when dynamic power save mode is disabled

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When a directed tim bit is set, mac80211 currently disables power save
ands sends a null frame to the AP. But if dynamic power save is
disabled, mac80211 will not enable power save ever gain. Fix this by
adding ps-poll functionality to mac80211. When a directed tim bit is
set, mac80211 sends a ps-poll frame to the AP and checks for the more
data bit in the returned data frames.

Using ps-poll is slower than waking up with null frame, but it's saves more
power in cases where the traffic is low. Userspace can control if either
ps-poll or null wakeup method is used by enabling and disabling dynamic
power save.

Signed-off-by: Kalle Valo <kalle.valo@nokia.com>
Signed-off-by: John W. Linville <linville@tuxdriver.com>

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This commit is contained in:

Kalle Valo 2009-02-10 17:09:31 +02:00 • committed by John W. Linville

parent 1fb3606bc5

commit 572e001221

3 changed files with 88 additions and 3 deletions

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3

net/mac80211/ieee80211_i.h

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54

net/mac80211/mlme.c

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34

net/mac80211/rx.c

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