mcu: Do not automatically restart MCU with new config if it is shutdown

Normally, the MCU is restarted on a config change.  However, that
should not be done automatically if the MCU is in a shutdown state.

Signed-off-by: Kevin O'Connor <kevin@koconnor.net>

klippy/mcu.py

@@ -567,6 +567,9 @@ class MCU:
             if start_reason == 'firmware_restart':
                 raise error("Failed automated reset of MCU '%s'" % (self._name,))
         if self._config_crc != config_params['crc']:
+            if config_params['is_shutdown']:
+                raise error("Can not update MCU '%s' config as it is shutdown"
+                            % (self._name,))
             self._check_restart("CRC mismatch")
             raise error("MCU '%s' CRC does not match config" % (self._name,))
         move_count = config_params['move_count']

src/basecmd.c

@@ -201,8 +201,8 @@ static uint32_t config_crc;
 void
 command_get_config(uint32_t *args)
 {
-    sendf("config is_config=%c crc=%u move_count=%hu"
-          , is_finalized(), config_crc, move_count);
+    sendf("config is_config=%c crc=%u move_count=%hu is_shutdown=%c"
+          , is_finalized(), config_crc, move_count, sched_is_shutdown());
 }
 DECL_COMMAND_FLAGS(command_get_config, HF_IN_SHUTDOWN, "get_config");