[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, 81 insertions, 0 deletions

diff --git a/drivers/net/wireless/libertas/assoc.c b/drivers/net/wireless/libertas/assoc.c
index 4bc128f..3f2dfaf 100644
--- a/drivers/net/wireless/libertas/assoc.c
+++ b/drivers/net/wireless/libertas/assoc.c
@@ -22,6 +22,10 @@ static int assoc_helper_essid(wlan_private *priv,
 
 	lbs_deb_enter(LBS_DEB_ASSOC);
 
+	/* FIXME: take channel into account when picking SSIDs if a channel
+	 * is set.
+	 */
+
 	lbs_deb_assoc("New SSID requested: %s\n", assoc_req->ssid.ssid);
 	if (assoc_req->mode == IW_MODE_INFRA) {
 		if (adapter->prescan) {
@@ -158,6 +162,69 @@ done:
 }
 
 
+static int update_channel(wlan_private * priv)
+{
+	/* the channel in f/w could be out of sync, get the current channel */
+	return libertas_prepare_and_send_command(priv, cmd_802_11_rf_channel,
+				    cmd_opt_802_11_rf_channel_get,
+				    cmd_option_waitforrsp, 0, NULL);
+}
+
+static int assoc_helper_channel(wlan_private *priv,
+                                struct assoc_request * assoc_req)
+{
+	wlan_adapter *adapter = priv->adapter;
+	int ret = 0;
+
+	lbs_deb_enter(LBS_DEB_ASSOC);
+
+	ret = update_channel(priv);
+	if (ret < 0) {
+		lbs_deb_assoc("ASSOC: channel: error getting channel.");
+	}
+
+	if (assoc_req->channel == adapter->curbssparams.channel)
+		goto done;
+
+	lbs_deb_assoc("ASSOC: channel: %d -> %d\n",
+	       adapter->curbssparams.channel, assoc_req->channel);
+
+	ret = libertas_prepare_and_send_command(priv, cmd_802_11_rf_channel,
+				cmd_opt_802_11_rf_channel_set,
+				cmd_option_waitforrsp, 0, &assoc_req->channel);
+	if (ret < 0) {
+		lbs_deb_assoc("ASSOC: channel: error setting channel.");
+	}
+
+	ret = update_channel(priv);
+	if (ret < 0) {
+		lbs_deb_assoc("ASSOC: channel: error getting channel.");
+	}
+
+	if (assoc_req->channel != adapter->curbssparams.channel) {
+		lbs_deb_assoc("ASSOC: channel: failed to update channel to %d",
+		              assoc_req->channel);
+		goto done;
+	}
+
+	if (   assoc_req->secinfo.wep_enabled
+	    &&   (assoc_req->wep_keys[0].len
+	       || assoc_req->wep_keys[1].len
+	       || assoc_req->wep_keys[2].len
+	       || assoc_req->wep_keys[3].len)) {
+		/* Make sure WEP keys are re-sent to firmware */
+		set_bit(ASSOC_FLAG_WEP_KEYS, &assoc_req->flags);
+	}
+
+	/* Must restart/rejoin adhoc networks after channel change */
+	set_bit(ASSOC_FLAG_SSID, &assoc_req->flags);
+
+done:
+	lbs_deb_leave_args(LBS_DEB_ASSOC, "ret %d", ret);
+	return ret;
+}
+
+
 static int assoc_helper_wep_keys(wlan_private *priv,
                                  struct assoc_request * assoc_req)
 {
@@ -334,6 +401,11 @@ static int should_stop_adhoc(wlan_adapter *adapter,
 			return 1;
 	}
 
+	if (test_bit(ASSOC_FLAG_CHANNEL, &assoc_req->flags)) {
+		if (assoc_req->channel != adapter->curbssparams.channel)
+			return 1;
+	}
+
 	return 0;
 }
 
@@ -423,6 +495,15 @@ lbs_deb_assoc("ASSOC(:%d) mode: ret = %d\n", __LINE__, ret);
 		}
 	}
 
+	if (test_bit(ASSOC_FLAG_CHANNEL, &assoc_req->flags)) {
+		ret = assoc_helper_channel(priv, assoc_req);
+		if (ret) {
+			lbs_deb_assoc("ASSOC(:%d) channel: ret = %d\n",
+			              __LINE__, ret);
+			goto out;
+		}
+	}
+
 	if (   test_bit(ASSOC_FLAG_WEP_KEYS, &assoc_req->flags)
 	    || test_bit(ASSOC_FLAG_WEP_TX_KEYIDX, &assoc_req->flags)) {
 		ret = assoc_helper_wep_keys(priv, assoc_req);