]> git.openfabrics.org - ~shefty/rdma-dev.git/blobdiff - net/mac80211/scan.c
mac80211: fix ibss scanning
[~shefty/rdma-dev.git] / net / mac80211 / scan.c
index 8ed83dcc149fc7f38ca9beaf83a2c67a82c336ec..de3532d18df1dfb6a838ee7239d4b5d4c2a935d1 100644 (file)
@@ -832,9 +832,9 @@ int ieee80211_request_scan(struct ieee80211_sub_if_data *sdata,
        return res;
 }
 
-int ieee80211_request_internal_scan(struct ieee80211_sub_if_data *sdata,
-                                   const u8 *ssid, u8 ssid_len,
-                                   struct ieee80211_channel *chan)
+int ieee80211_request_ibss_scan(struct ieee80211_sub_if_data *sdata,
+                               const u8 *ssid, u8 ssid_len,
+                               struct ieee80211_channel *chan)
 {
        struct ieee80211_local *local = sdata->local;
        int ret = -EBUSY;
@@ -848,22 +848,36 @@ int ieee80211_request_internal_scan(struct ieee80211_sub_if_data *sdata,
 
        /* fill internal scan request */
        if (!chan) {
-               int i, nchan = 0;
+               int i, max_n;
+               int n_ch = 0;
 
                for (band = 0; band < IEEE80211_NUM_BANDS; band++) {
                        if (!local->hw.wiphy->bands[band])
                                continue;
-                       for (i = 0;
-                            i < local->hw.wiphy->bands[band]->n_channels;
-                            i++) {
-                               local->int_scan_req->channels[nchan] =
+
+                       max_n = local->hw.wiphy->bands[band]->n_channels;
+                       for (i = 0; i < max_n; i++) {
+                               struct ieee80211_channel *tmp_ch =
                                    &local->hw.wiphy->bands[band]->channels[i];
-                               nchan++;
+
+                               if (tmp_ch->flags & (IEEE80211_CHAN_NO_IBSS |
+                                                    IEEE80211_CHAN_DISABLED))
+                                       continue;
+
+                               local->int_scan_req->channels[n_ch] = tmp_ch;
+                               n_ch++;
                        }
                }
 
-               local->int_scan_req->n_channels = nchan;
+               if (WARN_ON_ONCE(n_ch == 0))
+                       goto unlock;
+
+               local->int_scan_req->n_channels = n_ch;
        } else {
+               if (WARN_ON_ONCE(chan->flags & (IEEE80211_CHAN_NO_IBSS |
+                                               IEEE80211_CHAN_DISABLED)))
+                       goto unlock;
+
                local->int_scan_req->channels[0] = chan;
                local->int_scan_req->n_channels = 1;
        }