[RFC] mac80211: Add exception for mesh on running check to set beaconing

[RFC] mac80211: Add exception for mesh on running check to set beaconing

[Steve deRosier]

There was a problem with mesh not enabling beacons in select
drivers (notably libertas_tf, though others are likely affected),
due to the addition of the SDATA_STATE_RUNNING flag at the end
of ieee80211_do_open.  The problem is mesh gets started and
wants to send the beacon-enable message to the driver before
SDATA_STATE_RUNNING gets set, but ieee80211_bss_info_change_notify
has the following check before enabling beacons:
!ieee80211_sdata_running(sdata)

This patch adds an exception for mesh to the sdata running check,
to allow mesh to start beacons.

I don't know if this is the best solution, perhaps moving the
SDATA_STATE_RUNNING set, or a driver modification is in order,
but this seems the easiest and least dammaging way to do this.

For reference the SDATA_STATE_RUNNING stuff was added in commit 
34d4bc4d about two weeks ago.

Signed-off-by: Steve deRosier <steve@cozybit.com>

---
 net/mac80211/main.c |    4 +++-
 1 files changed, 3 insertions(+), 1 deletions(-)

diff --git a/net/mac80211/main.c b/net/mac80211/main.c
index 4935b84..d1ad7fa 100644
--- a/net/mac80211/main.c
+++ b/net/mac80211/main.c
@@ -221,7 +221,9 @@ void ieee80211_bss_info_change_notify(struct ieee80211_sub_if_data *sdata,
 	}
 
 	if (changed & BSS_CHANGED_BEACON_ENABLED) {
-		if (local->quiescing || !ieee80211_sdata_running(sdata) ||
+		if (local->quiescing ||
+		    (!ieee80211_sdata_running(sdata) &&
+		    sdata->vif.type != NL80211_IFTYPE_MESH_POINT) ||
 		    test_bit(SCAN_SW_SCANNING, &local->scanning)) {
 			sdata->vif.bss_conf.enable_beacon = false;
 		} else {
-- 
1.7.0