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mac80211: disable powersave if pm_qos asks for low latency

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When an application asks for a latency lower than the beacon interval
there's nothing we can do -- we need to stay awake and not have the
AP buffer frames for us. Add code to automatically calculate this
constraint in mac80211 so drivers need not concern themselves with it.

Signed-off-by: Johannes Berg <johannes@sipsolutions.net>
Signed-off-by: John W. Linville <linville@tuxdriver.com>
This commit is contained in:
Johannes Berg 2009-04-16 13:17:25 +02:00 • committed by John W. Linville
parent 965bedadc0
commit 10f644a47b
6 changed files with 72 additions and 15 deletions
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9
include/linux/ieee80211.h
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@ -1383,4 +1383,13 @@ static inline int ieee80211_freq_to_ofdm_chan(int s_freq, int freq)
return -1;
}
/**
* ieee80211_tu_to_usec - convert time units (TU) to microseconds
* @tu: the TUs
*/
static inline unsigned long ieee80211_tu_to_usec(unsigned long tu)
{
return 1024 * tu;
}
#endif /* LINUX_IEEE80211_H */