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authorJohannes Berg <johannes@sipsolutions.net>2009-05-17 09:40:42 (GMT)
committerJohn W. Linville <linville@tuxdriver.com>2009-05-20 18:46:25 (GMT)
commit5bb644a0fd25a5e083ecbfaa92a211db99aa6ef7 (patch)
treed2a6d5ff2323db0c475be15c63bb8fc55482a1e2 /net/mac80211/scan.c
parentcc32abd494c0a8f76f2638e3f3a76e01c68bc9ea (diff)
downloadlinux-5bb644a0fd25a5e083ecbfaa92a211db99aa6ef7.tar.xz
mac80211: cancel/restart all timers across suspend/resume
We forgot to cancel all timers in mac80211 when suspending. In particular we forgot to deal with some things that can cause hardware reconfiguration -- while it is down. While at it we go ahead and add a warning in ieee80211_sta_work() if its run while the suspend->resume cycle is in effect. This should not happen and if it does it would indicate there is a bug lurking in either mac80211 or mac80211 drivers. With this now wpa_supplicant doesn't blink when I go to suspend and resume where as before there where issues with some timers running during the suspend->resume cycle. This caused a lot of incorrect assumptions and would at times bring back the device in an incoherent, but mostly recoverable, state. Signed-off-by: Luis R. Rodriguez <lrodriguez@atheros.com> Signed-off-by: Johannes Berg <johannes@sipsolutions.net> Signed-off-by: John W. Linville <linville@tuxdriver.com>
Diffstat (limited to 'net/mac80211/scan.c')
-rw-r--r--net/mac80211/scan.c18
1 files changed, 18 insertions, 0 deletions
diff --git a/net/mac80211/scan.c b/net/mac80211/scan.c
index e65d74b..2a8d09a 100644
--- a/net/mac80211/scan.c
+++ b/net/mac80211/scan.c
@@ -631,3 +631,21 @@ int ieee80211_request_internal_scan(struct ieee80211_sub_if_data *sdata,
mutex_unlock(&local->scan_mtx);
return ret;
}
+
+void ieee80211_scan_cancel(struct ieee80211_local *local)
+{
+ bool swscan;
+
+ cancel_delayed_work_sync(&local->scan_work);
+
+ /*
+ * Only call this function when a scan can't be
+ * queued -- mostly at suspend under RTNL.
+ */
+ mutex_lock(&local->scan_mtx);
+ swscan = local->sw_scanning;
+ mutex_unlock(&local->scan_mtx);
+
+ if (swscan)
+ ieee80211_scan_completed(&local->hw, true);
+}