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authorJohannes Berg <johannes@sipsolutions.net>2009-04-16 13:17:25 +0200
committerJohn W. Linville <linville@tuxdriver.com>2009-04-22 16:57:16 -0400
commit10f644a47b76d3e61b98f2d02ce9690b94c51ee5 (patch)
treefc344d0f888ea0b97608cd53eec1d2dc17672087 /net/mac80211/main.c
parent965bedadc01d34027455d5d5b67063ef0209c955 (diff)
mac80211: disable powersave if pm_qos asks for low latency
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>
Diffstat (limited to 'net/mac80211/main.c')
-rw-r--r--net/mac80211/main.c31
1 files changed, 24 insertions, 7 deletions
diff --git a/net/mac80211/main.c b/net/mac80211/main.c
index 80c0e28bf54..049ce863980 100644
--- a/net/mac80211/main.c
+++ b/net/mac80211/main.c
@@ -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();
/*