[PATCH] libertas: move channel changing into association framework

Handle channel changes through the deferred association framework
rather than directly.  Fixes errors when setting channels along
with other parameters like mode and SSID.

Signed-off-by: Dan Williams <dcbw@redhat.com>
Signed-off-by: John W. Linville <linville@tuxdriver.com>

1 files changed, 31 insertions, 151 deletions

diff --git a/drivers/net/wireless/libertas/wext.c b/drivers/net/wireless/libertas/wext.c
index 518371a76c3..40dd08018b4 100644
--- a/drivers/net/wireless/libertas/wext.c
+++ b/drivers/net/wireless/libertas/wext.c
@@ -157,103 +157,6 @@ static struct chan_freq_power *find_cfp_by_band_and_freq(wlan_adapter * adapter,
 	return cfp;
 }
 
-static int updatecurrentchannel(wlan_private * priv)
-{
-	int ret;
-
-	/*
-	 ** the channel in f/w could be out of sync, get the current channel
-	 */
-	ret = libertas_prepare_and_send_command(priv, cmd_802_11_rf_channel,
-				    cmd_opt_802_11_rf_channel_get,
-				    cmd_option_waitforrsp, 0, NULL);
-
-	lbs_deb_wext("current channel %d\n",
-	       priv->adapter->curbssparams.channel);
-
-	return ret;
-}
-
-static int setcurrentchannel(wlan_private * priv, int channel)
-{
-	lbs_deb_wext("set channel %d\n", channel);
-
-	/*
-	 **  Current channel is not set to adhocchannel requested, set channel
-	 */
-	return (libertas_prepare_and_send_command(priv, cmd_802_11_rf_channel,
-				      cmd_opt_802_11_rf_channel_set,
-				      cmd_option_waitforrsp, 0, &channel));
-}
-
-static int changeadhocchannel(wlan_private * priv, int channel)
-{
-	int ret = 0;
-	struct WLAN_802_11_SSID curadhocssid;
-	struct bss_descriptor * join_bss = NULL;
-	wlan_adapter *adapter = priv->adapter;
-
-	adapter->adhocchannel = channel;
-
-	updatecurrentchannel(priv);
-
-	if (adapter->curbssparams.channel == adapter->adhocchannel) {
-		/* adhocchannel is set to the current channel already */
-		goto out;
-	}
-
-	lbs_deb_wext("updating channel from %d to %d\n",
-	       adapter->curbssparams.channel, adapter->adhocchannel);
-
-	setcurrentchannel(priv, adapter->adhocchannel);
-
-	updatecurrentchannel(priv);
-
-	if (adapter->curbssparams.channel != adapter->adhocchannel) {
-		lbs_deb_wext("failed to updated channel to %d, channel = %d\n",
-		       adapter->adhocchannel, adapter->curbssparams.channel);
-		ret = -1;
-		goto out;
-	}
-
-	if (adapter->connect_status != libertas_connected)
-		goto out;
-
-	lbs_deb_wext("channel changed while in IBSS\n");
-
-	/* Copy the current ssid */
-	memcpy(&curadhocssid, &adapter->curbssparams.ssid,
-	       sizeof(struct WLAN_802_11_SSID));
-
-	/* Exit Adhoc mode */
-	lbs_deb_wext("in changeadhocchannel(): sending Adhoc stop\n");
-	ret = libertas_stop_adhoc_network(priv);
-	if (ret)
-		goto out;
-
-	/* Scan for the network, do not save previous results.  Stale
-	 *   scan data will cause us to join a non-existant adhoc network
-	 */
-	libertas_send_specific_SSID_scan(priv, &curadhocssid, 1);
-
-	/* find out the BSSID that matches the current SSID */
-	join_bss = libertas_find_SSID_in_list(adapter, &curadhocssid, NULL,
-			   IW_MODE_ADHOC);
-
-	if (join_bss) {
-		lbs_deb_wext("SSID found in list, so join\n");
-		libertas_join_adhoc_network(priv, join_bss);
-	} else {
-		lbs_deb_wext("SSID not found in list, "
-		       "creating AdHoc with SSID '%s'\n",
-		       curadhocssid.ssid);
-		libertas_start_adhoc_network(priv, &curadhocssid);
-	}
-
-out:
-	lbs_deb_leave_args(LBS_DEB_WEXT, "ret %d", ret);
-	return ret;
-}
 
 /**
  *  @brief Set Radio On/OFF
@@ -1228,82 +1131,59 @@ out:
 static int wlan_set_freq(struct net_device *dev, struct iw_request_info *info,
 		  struct iw_freq *fwrq, char *extra)
 {
-	int ret = 0;
+	int ret = -EINVAL;
 	wlan_private *priv = dev->priv;
 	wlan_adapter *adapter = priv->adapter;
-	int rc = -EINPROGRESS;	/* Call commit handler */
 	struct chan_freq_power *cfp;
+	struct assoc_request * assoc_req;
 
 	lbs_deb_enter(LBS_DEB_WEXT);
 
-	/*
-	 * If setting by frequency, convert to a channel
-	 */
-	if (fwrq->e == 1) {
+	mutex_lock(&adapter->lock);
+	assoc_req = wlan_get_association_request(adapter);
+	if (!assoc_req) {
+		ret = -ENOMEM;
+		goto out;
+	}
 
+	/* If setting by frequency, convert to a channel */
+	if (fwrq->e == 1) {
 		long f = fwrq->m / 100000;
-		int c = 0;
 
 		cfp = find_cfp_by_band_and_freq(adapter, 0, f);
 		if (!cfp) {
 			lbs_deb_wext("invalid freq %ld\n", f);
-			return -EINVAL;
+			goto out;
 		}
 
-		c = (int)cfp->channel;
-
-		if (c < 0)
-			return -EINVAL;
-
 		fwrq->e = 0;
-		fwrq->m = c;
+		fwrq->m = (int) cfp->channel;
 	}
 
-	/*
-	 * Setting by channel number
-	 */
+	/* Setting by channel number */
 	if (fwrq->m > 1000 || fwrq->e > 0) {
-		rc = -EOPNOTSUPP;
-	} else {
-		int channel = fwrq->m;
+		goto out;
+	}
 
-		cfp = libertas_find_cfp_by_band_and_channel(adapter, 0, channel);
-		if (!cfp) {
-			rc = -EINVAL;
-		} else {
-			if (adapter->mode == IW_MODE_ADHOC) {
-				rc = changeadhocchannel(priv, channel);
-				/*  If station is WEP enabled, send the
-				 *  command to set WEP in firmware
-				 */
-				if (adapter->secinfo.wep_enabled) {
-					lbs_deb_wext("set_freq: WEP enabled\n");
-					ret = libertas_prepare_and_send_command(priv,
-								    cmd_802_11_set_wep,
-								    cmd_act_add,
-								    cmd_option_waitforrsp,
-								    0,
-								    NULL);
-
-					if (ret) {
-						rc = ret;
-						goto out;
-					}
-
-					adapter->currentpacketfilter |=
-					    cmd_act_mac_wep_enable;
-
-					libertas_set_mac_packet_filter(priv);
-				}
-			} else {
-				rc = -EOPNOTSUPP;
-			}
-		}
+	cfp = libertas_find_cfp_by_band_and_channel(adapter, 0, fwrq->m);
+	if (!cfp) {
+		goto out;
 	}
 
+	assoc_req->channel = fwrq->m;
+	ret = 0;
+
 out:
-	lbs_deb_leave_args(LBS_DEB_WEXT, "ret %d", rc);
-	return rc;
+	if (ret == 0) {
+		set_bit(ASSOC_FLAG_CHANNEL, &assoc_req->flags);
+		wlan_postpone_association_work(priv);
+	} else {
+		wlan_cancel_association_work(priv);
+	}
+	mutex_unlock(&adapter->lock);
+
+	lbs_deb_leave_args(LBS_DEB_WEXT, "ret %d", ret);
+	return ret;
 }
 
 /**