icera,hso: don't wait to get connected if the primary port is removed

If the primary port is gone (e.g. when going to sleep) and we are just in the
middle of a connection attempt, we won't be able to receive any unsolicited
message regarding the status of the attempt. So, if we detect that the port is
forced to get closed, we'll just treat it as a connection failure.

http://code.google.com/p/chromium-os/issues/detail?id=35391

src/mm-serial-port.c

@@ -57,6 +57,7 @@ enum {
 enum {
     BUFFER_FULL,
     TIMED_OUT,
+    FORCED_CLOSE,
 
     LAST_SIGNAL
 };
@@ -1093,6 +1094,9 @@ mm_serial_port_close_force (MMSerialPort *self)
     /* Mark as having forced the close, so that we don't warn about incorrect
      * open counts */
     priv->forced_close = TRUE;
+
+    /* Notify about the forced close status */
+    g_signal_emit (self, signals[FORCED_CLOSE], 0);
 }
 
 static void
@@ -1670,4 +1674,13 @@ mm_serial_port_class_init (MMSerialPortClass *klass)
                       NULL, NULL,
                       g_cclosure_marshal_VOID__UINT,
 					  G_TYPE_NONE, 1, G_TYPE_UINT);
+
+    signals[FORCED_CLOSE] =
+        g_signal_new ("forced-close",
+                  G_OBJECT_CLASS_TYPE (object_class),
+                  G_SIGNAL_RUN_FIRST,
+                  G_STRUCT_OFFSET (MMSerialPortClass, forced_close),
+                  NULL, NULL,
+                  g_cclosure_marshal_VOID__VOID,
+                  G_TYPE_NONE, 0);
 }

src/mm-serial-port.h

@@ -100,6 +100,7 @@ struct _MMSerialPortClass {
     /* Signals */
     void (*buffer_full)           (MMSerialPort *port, const GByteArray *buffer);
     void (*timed_out)             (MMSerialPort *port, guint n_consecutive_replies);
+    void (*forced_close)          (MMSerialPort *port);
 };
 
 GType mm_serial_port_get_type (void);