wl12xx: add separate config value for DFS dwell time on sched scan
Luciano Coelho [Fri, 27 May 2011 12:34:47 +0000 (15:34 +0300)]
Use a different value for DFS dwell time when performing a scheduled
scan.  Previously we were using the same value as for normal passive
scans.  This adds some flexibility between these two different types
of passive scan.

For now we use 150 TUs for DFS channel dwell time.  This may need to
be fine-tuned in the future.

Signed-off-by: Luciano Coelho <coelho@ti.com>
Signed-off-by: John W. Linville <linville@tuxdriver.com>

drivers/net/wireless/wl12xx/conf.h
drivers/net/wireless/wl12xx/main.c
drivers/net/wireless/wl12xx/scan.c

index 1ab6c86..c83fefb 100644 (file)
@@ -1157,6 +1157,9 @@ struct conf_sched_scan_settings {
        /* time to wait on the channel for passive scans (in TUs) */
        u32 dwell_time_passive;
 
+       /* time to wait on the channel for DFS scans (in TUs) */
+       u32 dwell_time_dfs;
+
        /* number of probe requests to send on each channel in active scans */
        u8 num_probe_reqs;
 
index bc00e52..e6497dc 100644 (file)
@@ -311,6 +311,7 @@ static struct conf_drv_settings default_conf = {
                .min_dwell_time_active = 8,
                .max_dwell_time_active = 30,
                .dwell_time_passive    = 100,
+               .dwell_time_dfs        = 150,
                .num_probe_reqs        = 2,
                .rssi_threshold        = -90,
                .snr_threshold         = 0,
index 8ccbb91..28ec0ad 100644 (file)
@@ -352,9 +352,12 @@ wl1271_scan_get_sched_scan_channels(struct wl1271 *wl,
                        wl1271_debug(DEBUG_SCAN, "max_power %d",
                                     req->channels[i]->max_power);
 
-                       if (flags & IEEE80211_CHAN_RADAR)
+                       if (flags & IEEE80211_CHAN_RADAR) {
                                channels[j].flags |= SCAN_CHANNEL_FLAGS_DFS;
-                       if (flags & IEEE80211_CHAN_PASSIVE_SCAN) {
+                               channels[j].passive_duration =
+                                       cpu_to_le16(c->dwell_time_dfs);
+                       }
+                       else if (flags & IEEE80211_CHAN_PASSIVE_SCAN) {
                                channels[j].passive_duration =
                                        cpu_to_le16(c->dwell_time_passive);
                        } else {