mboxctl: Fix retrieval of property-based state

GetDaemonState and GetLpcState were converted from methods to properties
and renamed to DaemonState and LpcState respectively in mboxd. mboxctl
was overlooked in the change, so update it to match.

Change-Id: I34f55a036b14c611925b164e354934769e1e0759
Signed-off-by: Andrew Jeffery <andrew@aj.id.au>

mboxctl.c

@@ -92,44 +92,15 @@ out:
 	return rc < 0 ? rc : 0;
 }
 
-static int mboxctl_getter(struct mboxctl_context *context, const char *cmd,
-			  uint8_t *resp)
+static int mboxctl_getter(struct mboxctl_context *context,
+			  const char *property, uint8_t *resp)
 {
 	sd_bus_error error = SD_BUS_ERROR_NULL;
-	sd_bus_message *m = NULL, *n = NULL;
-	int rc;
 
-	rc = sd_bus_message_new_method_call(context->bus, &m,
-					    MBOX_DBUS_NAME,
+	return sd_bus_get_property_trivial(context->bus, MBOX_DBUS_NAME,
 					   MBOX_DBUS_OBJECT,
 					   MBOX_DBUS_CONTROL_IFACE,
-					    cmd);
-	if (rc < 0) {
-		MSG_ERR("Failed to init method call: %s\n",
-			strerror(-rc));
-		goto out;
-	}
-
-	rc = sd_bus_call(context->bus, m, 0, &error, &n);
-	if (rc < 0) {
-		MSG_ERR("Failed to post message: %s\n", strerror(-rc));
-		goto out;
-	}
-
-	rc = sd_bus_message_read_basic(n, 'y', resp);
-	if (rc < 0) {
-		MSG_ERR("Failed to read response args: %s\n",
-			strerror(-rc));
-		goto out;
-	}
-
-out:
-	sd_bus_error_free(&error);
-	sd_bus_message_unref(m);
-	sd_bus_message_unref(n);
-
-	return rc < 0 ? rc : 0;
-
+					   property, &error, 'y', resp);
 }
 
 static int handle_cmd_ping(struct mboxctl_context *context)
@@ -147,7 +118,7 @@ static int handle_cmd_daemon_state(struct mboxctl_context *context)
 	uint8_t resp;
 	int rc;
 
-	rc = mboxctl_getter(context, "GetDaemonState", &resp);
+	rc = mboxctl_getter(context, "DaemonState", &resp);
 	if (rc < 0)
 		return rc;
 
@@ -161,7 +132,7 @@ static int handle_cmd_lpc_state(struct mboxctl_context *context)
 	uint8_t resp;
 	int rc;
 
-	rc = mboxctl_getter(context, "GetLpcState", &resp);
+	rc = mboxctl_getter(context, "LpcState", &resp);
 	if (rc < 0)
 		return rc;