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authorStanislaw Gruszka <sgruszka@redhat.com>2013-02-28 10:55:25 +0100
committerJohannes Berg <johannes.berg@intel.com>2013-03-06 16:35:55 +0100
commit8125696991194aacb1173b6e8196d19098b44e17 (patch)
tree870dacf2225b328a8393be930128b056dfee0539 /net/wireless/core.c
parent30c97120c6c7893e5c6857a16229699b2b79dfbe (diff)
downloadop-kernel-dev-8125696991194aacb1173b6e8196d19098b44e17.zip
op-kernel-dev-8125696991194aacb1173b6e8196d19098b44e17.tar.gz
cfg80211/mac80211: disconnect on suspend
If possible that after suspend, cfg80211 will receive request to disconnect what require action on interface that was removed during suspend. Problem can manifest itself by various warnings similar to below one: WARNING: at net/mac80211/driver-ops.h:12 ieee80211_bss_info_change_notify+0x2f9/0x300 [mac80211]() wlan0: Failed check-sdata-in-driver check, flags: 0x4 Call Trace: [<c043e0b3>] warn_slowpath_fmt+0x33/0x40 [<f83707c9>] ieee80211_bss_info_change_notify+0x2f9/0x300 [mac80211] [<f83a660a>] ieee80211_recalc_ps_vif+0x2a/0x30 [mac80211] [<f83a6706>] ieee80211_set_disassoc+0xf6/0x500 [mac80211] [<f83a9441>] ieee80211_mgd_deauth+0x1f1/0x280 [mac80211] [<f8381b36>] ieee80211_deauth+0x16/0x20 [mac80211] [<f8261e70>] cfg80211_mlme_down+0x70/0xc0 [cfg80211] [<f8264de1>] __cfg80211_disconnect+0x1b1/0x1d0 [cfg80211] To fix the problem disconnect from any associated network before suspend. User space is responsible to establish connection again after resume. This basically need to be done by user space anyway, because associated stations can go away during suspend (for example NetworkManager disconnects on suspend and connect on resume by default). Patch also handle situation when driver refuse to suspend with wowlan configured and try to suspend again without it. Signed-off-by: Stanislaw Gruszka <sgruszka@redhat.com> Signed-off-by: Johannes Berg <johannes.berg@intel.com>
Diffstat (limited to 'net/wireless/core.c')
-rw-r--r--net/wireless/core.c73
1 files changed, 41 insertions, 32 deletions
diff --git a/net/wireless/core.c b/net/wireless/core.c
index ea4155f..f382cae 100644
--- a/net/wireless/core.c
+++ b/net/wireless/core.c
@@ -814,6 +814,46 @@ void cfg80211_update_iface_num(struct cfg80211_registered_device *rdev,
rdev->num_running_monitor_ifaces += num;
}
+void cfg80211_leave(struct cfg80211_registered_device *rdev,
+ struct wireless_dev *wdev)
+{
+ struct net_device *dev = wdev->netdev;
+
+ switch (wdev->iftype) {
+ case NL80211_IFTYPE_ADHOC:
+ cfg80211_leave_ibss(rdev, dev, true);
+ break;
+ case NL80211_IFTYPE_P2P_CLIENT:
+ case NL80211_IFTYPE_STATION:
+ mutex_lock(&rdev->sched_scan_mtx);
+ __cfg80211_stop_sched_scan(rdev, false);
+ mutex_unlock(&rdev->sched_scan_mtx);
+
+ wdev_lock(wdev);
+#ifdef CONFIG_CFG80211_WEXT
+ kfree(wdev->wext.ie);
+ wdev->wext.ie = NULL;
+ wdev->wext.ie_len = 0;
+ wdev->wext.connect.auth_type = NL80211_AUTHTYPE_AUTOMATIC;
+#endif
+ __cfg80211_disconnect(rdev, dev,
+ WLAN_REASON_DEAUTH_LEAVING, true);
+ cfg80211_mlme_down(rdev, dev);
+ wdev_unlock(wdev);
+ break;
+ case NL80211_IFTYPE_MESH_POINT:
+ cfg80211_leave_mesh(rdev, dev);
+ break;
+ case NL80211_IFTYPE_AP:
+ cfg80211_stop_ap(rdev, dev);
+ break;
+ default:
+ break;
+ }
+
+ wdev->beacon_interval = 0;
+}
+
static int cfg80211_netdev_notifier_call(struct notifier_block *nb,
unsigned long state,
void *ndev)
@@ -882,38 +922,7 @@ static int cfg80211_netdev_notifier_call(struct notifier_block *nb,
dev->priv_flags |= IFF_DONT_BRIDGE;
break;
case NETDEV_GOING_DOWN:
- switch (wdev->iftype) {
- case NL80211_IFTYPE_ADHOC:
- cfg80211_leave_ibss(rdev, dev, true);
- break;
- case NL80211_IFTYPE_P2P_CLIENT:
- case NL80211_IFTYPE_STATION:
- mutex_lock(&rdev->sched_scan_mtx);
- __cfg80211_stop_sched_scan(rdev, false);
- mutex_unlock(&rdev->sched_scan_mtx);
-
- wdev_lock(wdev);
-#ifdef CONFIG_CFG80211_WEXT
- kfree(wdev->wext.ie);
- wdev->wext.ie = NULL;
- wdev->wext.ie_len = 0;
- wdev->wext.connect.auth_type = NL80211_AUTHTYPE_AUTOMATIC;
-#endif
- __cfg80211_disconnect(rdev, dev,
- WLAN_REASON_DEAUTH_LEAVING, true);
- cfg80211_mlme_down(rdev, dev);
- wdev_unlock(wdev);
- break;
- case NL80211_IFTYPE_MESH_POINT:
- cfg80211_leave_mesh(rdev, dev);
- break;
- case NL80211_IFTYPE_AP:
- cfg80211_stop_ap(rdev, dev);
- break;
- default:
- break;
- }
- wdev->beacon_interval = 0;
+ cfg80211_leave(rdev, wdev);
break;
case NETDEV_DOWN:
cfg80211_update_iface_num(rdev, wdev->iftype, -1);
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