For client STA interfaces, ieee80211_do_stop unsets the relevant
interface's SDATA_STATE_RUNNING state bit prior to cancelling an
interrupted scan. When ieee80211_offchannel_return is invoked as
part of cancelling the scan, it doesn't bother unsetting the
SDATA_STATE_OFFCHANNEL bit because it sees that the interface is
down. Normally this doesn't matter because when the client STA
interface is brought back up, it will probably issue a scan. But
in some cases (e.g., the user changes the interface type while it
is down), the SDATA_STATE_OFFCHANNEL bit will remain set. This
prevents the interface queues from being started. So we
unconditionally unset this bit when we cancel a scan.
---
net/mac80211/offchannel.c | 4 +++-
1 files changed, 3 insertions(+), 1 deletions(-)
diff --git a/net/mac80211/offchannel.c b/net/mac80211/offchannel.c
index 4b56409..6252a76 100644
--- a/net/mac80211/offchannel.c
+++ b/net/mac80211/offchannel.c
@@ -156,8 +156,10 @@ void ieee80211_offchannel_return(struct ieee80211_local *local,
mutex_lock(&local->iflist_mtx);
list_for_each_entry(sdata, &local->interfaces, list) {
- if (!ieee80211_sdata_running(sdata))
+ if (!ieee80211_sdata_running(sdata)) {
+ clear_bit(SDATA_STATE_OFFCHANNEL, &sdata->state);
continue;
+ }
/* Tell AP we're back */
if (sdata->vif.type == NL80211_IFTYPE_STATION) {
--
1.7.1.1
--
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