From 77572fd13d7f468216b85e68a006000726a59e89 Mon Sep 17 00:00:00 2001 From: Eliad Peller Date: Thu, 16 Jun 2011 11:49:33 +0300 Subject: mac80211: quiesce vif before suspending Cancel all relevant timers/works before suspending (wowlan). This patch handles the following warning: WARNING: at net/mac80211/util.c:565 queueing ieee80211 work while going to suspend Backtrace: [] (ieee80211_can_queue_work+0x0/0x4c [mac80211]) [] (ieee80211_queue_work+0x0/0x30 [mac80211]) [] (ieee80211_sta_timer+0x0/0x3c [mac80211]) [] (run_timer_softirq+0x0/0x220) [] (__do_softirq+0x0/0x130) [] (irq_exit+0x0/0xb4) [] (ipi_timer+0x0/0x4c) [] (do_local_timer+0x0/0x88) [] (cpu_idle+0x0/0xe0) [] (rest_init+0x0/0xe0) [] (start_kernel+0x0/0x314) Signed-off-by: Eliad Peller Signed-off-by: John W. Linville --- net/mac80211/pm.c | 43 +++++++++++++++++++++++++++---------------- 1 file changed, 27 insertions(+), 16 deletions(-) (limited to 'net/mac80211/pm.c') diff --git a/net/mac80211/pm.c b/net/mac80211/pm.c index 730778a2c90..67839eb90cc 100644 --- a/net/mac80211/pm.c +++ b/net/mac80211/pm.c @@ -6,6 +6,28 @@ #include "driver-ops.h" #include "led.h" +/* return value indicates whether the driver should be further notified */ +static bool ieee80211_quiesce(struct ieee80211_sub_if_data *sdata) +{ + switch (sdata->vif.type) { + case NL80211_IFTYPE_STATION: + ieee80211_sta_quiesce(sdata); + return true; + case NL80211_IFTYPE_ADHOC: + ieee80211_ibss_quiesce(sdata); + return true; + case NL80211_IFTYPE_MESH_POINT: + ieee80211_mesh_quiesce(sdata); + return true; + case NL80211_IFTYPE_AP_VLAN: + case NL80211_IFTYPE_MONITOR: + /* don't tell driver about this */ + return false; + default: + return true; + } +} + int __ieee80211_suspend(struct ieee80211_hw *hw, struct cfg80211_wowlan *wowlan) { struct ieee80211_local *local = hw_to_local(hw); @@ -54,6 +76,10 @@ int __ieee80211_suspend(struct ieee80211_hw *hw, struct cfg80211_wowlan *wowlan) local->quiescing = false; return err; } + list_for_each_entry(sdata, &local->interfaces, list) { + cancel_work_sync(&sdata->work); + ieee80211_quiesce(sdata); + } goto suspend; } @@ -82,23 +108,8 @@ int __ieee80211_suspend(struct ieee80211_hw *hw, struct cfg80211_wowlan *wowlan) list_for_each_entry(sdata, &local->interfaces, list) { cancel_work_sync(&sdata->work); - switch(sdata->vif.type) { - case NL80211_IFTYPE_STATION: - ieee80211_sta_quiesce(sdata); - break; - case NL80211_IFTYPE_ADHOC: - ieee80211_ibss_quiesce(sdata); - break; - case NL80211_IFTYPE_MESH_POINT: - ieee80211_mesh_quiesce(sdata); - break; - case NL80211_IFTYPE_AP_VLAN: - case NL80211_IFTYPE_MONITOR: - /* don't tell driver about this */ + if (!ieee80211_quiesce(sdata)) continue; - default: - break; - } if (!ieee80211_sdata_running(sdata)) continue; -- cgit v1.2.3-70-g09d2 From 2b4562dfd6ad3579951de21168cb9d266ed3f1bd Mon Sep 17 00:00:00 2001 From: Johannes Berg Date: Sat, 2 Jul 2011 00:02:01 +0200 Subject: mac80211: allow driver to impose WoWLAN restrictions If the driver can't support WoWLAN in the current state, this patch allows it to return 1 from the suspend callback to do the normal deconfiguration instead of using suspend/resume calls. Note that if it does this, resume won't be called. Signed-off-by: Johannes Berg Signed-off-by: John W. Linville --- include/net/mac80211.h | 4 ++++ net/mac80211/pm.c | 16 ++++++++++------ 2 files changed, 14 insertions(+), 6 deletions(-) (limited to 'net/mac80211/pm.c') diff --git a/include/net/mac80211.h b/include/net/mac80211.h index c9def42c128..2858b4d02f5 100644 --- a/include/net/mac80211.h +++ b/include/net/mac80211.h @@ -1628,6 +1628,10 @@ enum ieee80211_ampdu_mlme_action { * ask the device to suspend. This is only invoked when WoWLAN is * configured, otherwise the device is deconfigured completely and * reconfigured at resume time. + * The driver may also impose special conditions under which it + * wants to use the "normal" suspend (deconfigure), say if it only + * supports WoWLAN when the device is associated. In this case, it + * must return 1 from this function. * * @resume: If WoWLAN was configured, this indicates that mac80211 is * now resuming its operation, after this the device must be fully diff --git a/net/mac80211/pm.c b/net/mac80211/pm.c index 67839eb90cc..f87e993e713 100644 --- a/net/mac80211/pm.c +++ b/net/mac80211/pm.c @@ -72,15 +72,19 @@ int __ieee80211_suspend(struct ieee80211_hw *hw, struct cfg80211_wowlan *wowlan) local->wowlan = wowlan && local->open_count; if (local->wowlan) { int err = drv_suspend(local, wowlan); - if (err) { + if (err < 0) { local->quiescing = false; return err; + } else if (err > 0) { + WARN_ON(err != 1); + local->wowlan = false; + } else { + list_for_each_entry(sdata, &local->interfaces, list) { + cancel_work_sync(&sdata->work); + ieee80211_quiesce(sdata); + } + goto suspend; } - list_for_each_entry(sdata, &local->interfaces, list) { - cancel_work_sync(&sdata->work); - ieee80211_quiesce(sdata); - } - goto suspend; } /* disable keys */ -- cgit v1.2.3-70-g09d2