mac80211: fix supported rates IE if AP doesn't give us it's rates

If AP do not provide us supported rates before assiociation, send
all rates we are supporting instead of empty information element.

v1 -> v2: Add comment.

Signed-off-by: Stanislaw Gruszka <sgruszka@redhat.com>
Signed-off-by: John W. Linville <linville@tuxdriver.com>

diff --git a/net/mac80211/work.c b/net/mac80211/work.c
index 7bd8670379dea4c4ce4dd246191c48fa4b979ee7..4c7de72c27e7ae062b0f89af55778ebf1f0c2ca3 100644 (file)
--- a/net/mac80211/work.c
+++ b/net/mac80211/work.c
@@ -212,15 +212,25 @@ static void ieee80211_send_assoc(struct ieee80211_sub_if_data *sdata,
 
        sband = local->hw.wiphy->bands[wk->chan->band];
 
-       /*
-        * Get all rates supported by the device and the AP as
-        * some APs don't like getting a superset of their rates
-        * in the association request (e.g. D-Link DAP 1353 in
-        * b-only mode)...
-        */
-       rates_len = ieee80211_compatible_rates(wk->assoc.supp_rates,
-                                              wk->assoc.supp_rates_len,
-                                              sband, &rates);
+       if (wk->assoc.supp_rates_len) {
+               /*
+                * Get all rates supported by the device and the AP as
+                * some APs don't like getting a superset of their rates
+                * in the association request (e.g. D-Link DAP 1353 in
+                * b-only mode)...
+                */
+               rates_len = ieee80211_compatible_rates(wk->assoc.supp_rates,
+                                                      wk->assoc.supp_rates_len,
+                                                      sband, &rates);
+       } else {
+               /*
+                * In case AP not provide any supported rates information
+                * before association, we send information element(s) with
+                * all rates that we support.
+                */
+               rates = ~0;
+               rates_len = sband->n_bitrates;
+       }
 
        skb = alloc_skb(local->hw.extra_tx_headroom +
                        sizeof(*mgmt) + /* bit too much but doesn't matter */