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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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31
net/mac80211/main.c
View File

@@ -21,6 +21,7 @@
#include <linux/wireless.h>
#include <linux/rtnetlink.h>
#include <linux/bitmap.h>
#include <linux/pm_qos_params.h>
#include <net/net_namespace.h>
#include <net/cfg80211.h>
@@ -1038,25 +1039,38 @@ int ieee80211_register_hw(struct ieee80211_hw *hw)
}
}
local->network_latency_notifier.notifier_call =
ieee80211_max_network_latency;
result = pm_qos_add_notifier(PM_QOS_NETWORK_LATENCY,
&local->network_latency_notifier);
if (result) {
rtnl_lock();
goto fail_pm_qos;
}
return 0;
fail_wep:
fail_pm_qos:
ieee80211_led_exit(local);
ieee80211_remove_interfaces(local);
fail_wep:
rate_control_deinitialize(local);
fail_rate:
fail_rate:
unregister_netdevice(local->mdev);
local->mdev = NULL;
fail_dev:
fail_dev:
rtnl_unlock();
sta_info_stop(local);
fail_sta_info:
fail_sta_info:
debugfs_hw_del(local);
destroy_workqueue(local->hw.workqueue);
fail_workqueue:
fail_workqueue:
if (local->mdev)
free_netdev(local->mdev);
fail_mdev_alloc:
fail_mdev_alloc:
wiphy_unregister(local->hw.wiphy);
fail_wiphy_register:
fail_wiphy_register:
kfree(local->int_scan_req.channels);
return result;
}
@@ -1069,6 +1083,9 @@ void ieee80211_unregister_hw(struct ieee80211_hw *hw)
tasklet_kill(&local->tx_pending_tasklet);
tasklet_kill(&local->tasklet);
pm_qos_remove_notifier(PM_QOS_NETWORK_LATENCY,
&local->network_latency_notifier);
rtnl_lock();
/*