wl1271: implement cmd_disconnect

This patch implements the CMD_DISCONNECT command, which should be sent to the
firmware when we are disassociated.

Signed-off-by: Luciano Coelho <luciano.coelho@nokia.com>
Reviewed-by: Juuso Oikarinen <juuso.oikarinen@nokia.com>
Signed-off-by: John W. Linville <linville@tuxdriver.com>
diff --git a/drivers/net/wireless/wl12xx/wl1271_cmd.c b/drivers/net/wireless/wl12xx/wl1271_cmd.c
index ac93efd..d09ad12 100644
--- a/drivers/net/wireless/wl12xx/wl1271_cmd.c
+++ b/drivers/net/wireless/wl12xx/wl1271_cmd.c
@@ -191,7 +191,6 @@
 			do_cal = false;
 	}
 
-
 	join = kzalloc(sizeof(*join), GFP_KERNEL);
 	if (!join) {
 		ret = -ENOMEM;
@@ -825,3 +824,34 @@
 
 	return ret;
 }
+
+int wl1271_cmd_disconnect(struct wl1271 *wl)
+{
+	struct wl1271_cmd_disconnect *cmd;
+	int ret = 0;
+
+	wl1271_debug(DEBUG_CMD, "cmd disconnect");
+
+	cmd = kzalloc(sizeof(*cmd), GFP_KERNEL);
+	if (!cmd) {
+		ret = -ENOMEM;
+		goto out;
+	}
+
+	cmd->rx_config_options = wl->rx_config;
+	cmd->rx_filter_options = wl->rx_filter;
+	/* disconnect reason is not used in immediate disconnections */
+	cmd->type = DISCONNECT_IMMEDIATE;
+
+	ret = wl1271_cmd_send(wl, CMD_DISCONNECT, cmd, sizeof(*cmd));
+	if (ret < 0) {
+		wl1271_error("failed to send disconnect command");
+		goto out_free;
+	}
+
+out_free:
+	kfree(cmd);
+
+out:
+	return ret;
+}