mac80211: eliminate IBSS warning in rate_lowest_index()

In IBSS mode prior to join/creation of new IBSS it is possible that
a frame from unknown station is received and an ibss_add_sta() is
called. This will cause a warning in rate_lowest_index() since the
list of supported rates of our station is not initialized yet.

The fix is to add ibss stations with a rate we received that frame
at; this single-element set will be extended later based on beacon
data. Also there is no need to store stations from a foreign IBSS.

Signed-off-by: Vladimir Koutny <vlado@ksp.sk>
Signed-off-by: John W. Linville <linville@tuxdriver.com>

1 files changed, 8 insertions, 2 deletions

diff --git a/net/mac80211/rx.c b/net/mac80211/rx.c
index e80336f8f1ea..c32a0bcd53b7 100644
--- a/net/mac80211/rx.c
+++ b/net/mac80211/rx.c
@@ -1823,8 +1823,13 @@ static int prepare_for_handlers(struct ieee80211_sub_if_data *sdata,
                 if (!bssid)
                         return 0;
                 if ((rx->fc & IEEE80211_FCTL_FTYPE) == IEEE80211_FTYPE_MGMT &&
-                    (rx->fc & IEEE80211_FCTL_STYPE) == IEEE80211_STYPE_BEACON)
+                    (rx->fc & IEEE80211_FCTL_STYPE) == IEEE80211_STYPE_BEACON) {
+                        if (!rx->sta)
+                                rx->sta = ieee80211_ibss_add_sta(sdata->dev,
+                                                rx->skb, bssid, hdr->addr2,
+                                                BIT(rx->status->rate_idx));
                         return 1;
+                }
                 else if (!ieee80211_bssid_match(bssid, sdata->u.sta.bssid)) {
                         if (!(rx->flags & IEEE80211_RX_IN_SCAN))
                                 return 0;
@@ -1837,7 +1842,8 @@ static int prepare_for_handlers(struct ieee80211_sub_if_data *sdata,
                         rx->flags &= ~IEEE80211_RX_RA_MATCH;
                 } else if (!rx->sta)
                         rx->sta = ieee80211_ibss_add_sta(sdata->dev, rx->skb,
-                                                         bssid, hdr->addr2);
+                                                bssid, hdr->addr2,
+                                                BIT(rx->status->rate_idx));
                 break;
         case IEEE80211_IF_TYPE_MESH_POINT:
                 if (!multicast &&