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rt2x00: Simplify suspend/resume handling 

With mac80211 handling all open interfaces during
suspend and resume we can simplify suspend/resume
within rt2x00lib.

The only thing rt2x00 needs to do is free up memory
during suspend and bring back the minimal required
components during resume.

Signed-off-by: Ivo van Doorn <IvDoorn@gmail.com>
Signed-off-by: John W. Linville <linville@tuxdriver.com>
This commit is contained in:
Ivo van Doorn 2009-01-23 17:04:05 +01:00 committed by John W. Linville
parent 9752a7bd7f
commit 0712612741
2 changed files with 5 additions and 89 deletions
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1
drivers/net/wireless/rt2x00/rt2x00.h
View File

@ -575,7 +575,6 @@ enum rt2x00_flags {
DEVICE_STATE_REGISTERED_HW,
DEVICE_STATE_INITIALIZED,
DEVICE_STATE_STARTED,
DEVICE_STATE_STARTED_SUSPEND,
DEVICE_STATE_ENABLED_RADIO,
DEVICE_STATE_DISABLED_RADIO_HW,

93
drivers/net/wireless/rt2x00/rt2x00dev.c
View File

@ -881,23 +881,17 @@ EXPORT_SYMBOL_GPL(rt2x00lib_remove_dev);
#ifdef CONFIG_PM
int rt2x00lib_suspend(struct rt2x00_dev *rt2x00dev, pm_message_t state)
{
int retval;
NOTICE(rt2x00dev, "Going to sleep.\n");
/*
* Only continue if mac80211 has open interfaces.
* Prevent mac80211 from accessing driver while suspended.
*/
if (!test_and_clear_bit(DEVICE_STATE_PRESENT, &rt2x00dev->flags) ||
!test_bit(DEVICE_STATE_STARTED, &rt2x00dev->flags))
goto exit;
set_bit(DEVICE_STATE_STARTED_SUSPEND, &rt2x00dev->flags);
if (!test_and_clear_bit(DEVICE_STATE_PRESENT, &rt2x00dev->flags))
return 0;
/*
* Disable radio.
* Cleanup as much as possible.
*/
rt2x00lib_stop(rt2x00dev);
rt2x00lib_uninitialize(rt2x00dev);
/*
@ -906,7 +900,6 @@ int rt2x00lib_suspend(struct rt2x00_dev *rt2x00dev, pm_message_t state)
rt2x00leds_suspend(rt2x00dev);
rt2x00debug_deregister(rt2x00dev);
exit:
/*
* Set device mode to sleep for power management,
* on some hardware this call seems to consistently fail.
@ -918,8 +911,7 @@ exit:
* the radio and the other components already disabled the
* device is as good as disabled.
*/
retval = rt2x00dev->ops->lib->set_device_state(rt2x00dev, STATE_SLEEP);
if (retval)
if (rt2x00dev->ops->lib->set_device_state(rt2x00dev, STATE_SLEEP))
WARNING(rt2x00dev, "Device failed to enter sleep state, "
"continue suspending.\n");
@ -927,34 +919,8 @@ exit:
}
EXPORT_SYMBOL_GPL(rt2x00lib_suspend);
static void rt2x00lib_resume_intf(void *data, u8 *mac,
struct ieee80211_vif *vif)
{
struct rt2x00_dev *rt2x00dev = data;
struct rt2x00_intf *intf = vif_to_intf(vif);
spin_lock(&intf->lock);
rt2x00lib_config_intf(rt2x00dev, intf,
vif->type, intf->mac, intf->bssid);
/*
* AP, Ad-hoc, and Mesh Point mode require a new beacon update.
*/
if (vif->type == NL80211_IFTYPE_AP ||
vif->type == NL80211_IFTYPE_ADHOC ||
vif->type == NL80211_IFTYPE_MESH_POINT ||
vif->type == NL80211_IFTYPE_WDS)
intf->delayed_flags |= DELAYED_UPDATE_BEACON;
spin_unlock(&intf->lock);
}
int rt2x00lib_resume(struct rt2x00_dev *rt2x00dev)
{
int retval;
NOTICE(rt2x00dev, "Waking up.\n");
/*
@ -963,61 +929,12 @@ int rt2x00lib_resume(struct rt2x00_dev *rt2x00dev)
rt2x00debug_register(rt2x00dev);
rt2x00leds_resume(rt2x00dev);
/*
* Only continue if mac80211 had open interfaces.
*/
if (!test_and_clear_bit(DEVICE_STATE_STARTED_SUSPEND, &rt2x00dev->flags))
return 0;
/*
* Reinitialize device and all active interfaces.
*/
retval = rt2x00lib_start(rt2x00dev);
if (retval)
goto exit;
/*
* Reconfigure device.
*/
retval = rt2x00mac_config(rt2x00dev->hw, ~0);
if (retval)
goto exit;
/*
* Iterator over each active interface to
* reconfigure the hardware.
*/
ieee80211_iterate_active_interfaces(rt2x00dev->hw,
rt2x00lib_resume_intf, rt2x00dev);
/*
* We are ready again to receive requests from mac80211.
*/
set_bit(DEVICE_STATE_PRESENT, &rt2x00dev->flags);
/*
* It is possible that during that mac80211 has attempted
* to send frames while we were suspending or resuming.
* In that case we have disabled the TX queue and should
* now enable it again
*/
ieee80211_wake_queues(rt2x00dev->hw);
/*
* During interface iteration we might have changed the
* delayed_flags, time to handles the event by calling
* the work handler directly.
*/
rt2x00lib_intf_scheduled(&rt2x00dev->intf_work);
return 0;
exit:
rt2x00lib_stop(rt2x00dev);
rt2x00lib_uninitialize(rt2x00dev);
rt2x00debug_deregister(rt2x00dev);
return retval;
}
EXPORT_SYMBOL_GPL(rt2x00lib_resume);
#endif /* CONFIG_PM */