From 352ffad646c0e0c5cf9ae8cea99710ee0d66ee27 Mon Sep 17 00:00:00 2001 From: Brian Cavagnolo Date: Thu, 4 Nov 2010 16:59:28 -0700 Subject: [PATCH] mac80211: unset SDATA_STATE_OFFCHANNEL when cancelling a scan 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 cancel the scan before unsetting the SDATA_STATE_RUNNING bit. Signed-off-by: Brian Cavagnolo Signed-off-by: John W. Linville --- net/mac80211/iface.c | 6 +++--- 1 file changed, 3 insertions(+), 3 deletions(-) diff --git a/net/mac80211/iface.c b/net/mac80211/iface.c index f9163b12c7f1..7aa85591dbe7 100644 --- a/net/mac80211/iface.c +++ b/net/mac80211/iface.c @@ -391,6 +391,9 @@ static void ieee80211_do_stop(struct ieee80211_sub_if_data *sdata, u32 hw_reconf_flags = 0; int i; + if (local->scan_sdata == sdata) + ieee80211_scan_cancel(local); + clear_bit(SDATA_STATE_RUNNING, &sdata->state); /* @@ -523,9 +526,6 @@ static void ieee80211_do_stop(struct ieee80211_sub_if_data *sdata, synchronize_rcu(); skb_queue_purge(&sdata->skb_queue); - if (local->scan_sdata == sdata) - ieee80211_scan_cancel(local); - /* * Disable beaconing here for mesh only, AP and IBSS * are already taken care of.