mac80211: BSS info: check channel first
When we receive information about a BSS we check at some point
whether or not we think we're allowed to use the channel it is
on, but we do that fairly late. I don't think we should do it
that late, so do it earlier to avoid doing IBSS/mesh stuff on
that channel and then getting confused because it's disabled.
Signed-off-by: Johannes Berg <johannes@sipsolutions.net>
Signed-off-by: John W. Linville <linville@tuxdriver.com>
diff --git a/net/mac80211/mlme.c b/net/mac80211/mlme.c
index a0324525..ae97d7e 100644
--- a/net/mac80211/mlme.c
+++ b/net/mac80211/mlme.c
@@ -2602,7 +2602,15 @@
DECLARE_MAC_BUF(mac);
DECLARE_MAC_BUF(mac2);
- beacon_timestamp = le64_to_cpu(mgmt->u.beacon.timestamp);
+ if (elems->ds_params && elems->ds_params_len == 1)
+ freq = ieee80211_channel_to_frequency(elems->ds_params[0]);
+ else
+ freq = rx_status->freq;
+
+ channel = ieee80211_get_channel(local->hw.wiphy, freq);
+
+ if (!channel || channel->flags & IEEE80211_CHAN_DISABLED)
+ return;
if (ieee80211_vif_is_mesh(&sdata->vif) && elems->mesh_id &&
elems->mesh_config && mesh_matches_local(elems, sdata)) {
@@ -2645,16 +2653,6 @@
rcu_read_unlock();
}
- if (elems->ds_params && elems->ds_params_len == 1)
- freq = ieee80211_channel_to_frequency(elems->ds_params[0]);
- else
- freq = rx_status->freq;
-
- channel = ieee80211_get_channel(local->hw.wiphy, freq);
-
- if (!channel || channel->flags & IEEE80211_CHAN_DISABLED)
- return;
-
#ifdef CONFIG_MAC80211_MESH
if (elems->mesh_config)
bss = ieee80211_rx_mesh_bss_get(local, elems->mesh_id,
@@ -2723,6 +2721,8 @@
bss->band = band;
+ beacon_timestamp = le64_to_cpu(mgmt->u.beacon.timestamp);
+
bss->timestamp = beacon_timestamp;
bss->last_update = jiffies;
bss->signal = rx_status->signal;