mac80211: disallow changing auto_open_plinks

while user MPM is running.

Signed-off-by: Thomas Pedersen <thomas@cozybit.com>
Signed-off-by: Johannes Berg <johannes.berg@intel.com>

1 files changed, 4 insertions, 1 deletions

diff --git a/net/mac80211/cfg.c b/net/mac80211/cfg.c
index c6c7f6e0b585..1d1ddabd89ca 100644
--- a/net/mac80211/cfg.c
+++ b/net/mac80211/cfg.c
@@ -1773,8 +1773,11 @@ static int ieee80211_update_mesh_config(struct wiphy *wiphy,
                 conf->dot11MeshTTL = nconf->dot11MeshTTL;
         if (_chg_mesh_attr(NL80211_MESHCONF_ELEMENT_TTL, mask))
                 conf->element_ttl = nconf->element_ttl;
-        if (_chg_mesh_attr(NL80211_MESHCONF_AUTO_OPEN_PLINKS, mask))
+        if (_chg_mesh_attr(NL80211_MESHCONF_AUTO_OPEN_PLINKS, mask)) {
+                if (ifmsh->user_mpm)
+                        return -EBUSY;
                 conf->auto_open_plinks = nconf->auto_open_plinks;
+        }
         if (_chg_mesh_attr(NL80211_MESHCONF_SYNC_OFFSET_MAX_NEIGHBOR, mask))
                 conf->dot11MeshNbrOffsetMaxNeighbor =
                         nconf->dot11MeshNbrOffsetMaxNeighbor;