libxl: remove QMP warning when no pty style serial device is configured

If the serial device is not "pty" then there is nothing to do but this is not
an error. Removes a spurious warning if e.g. serial="file:/tmp/serial.log" is used:

libxl: error: libxl_qmp.c:137:register_serials_chardev_callback: Failed to store serial port information in xenstore: No such file or directory

Signed-off-by: Ian Campbell <ian.campbell@citrix.com>
Acked-by: Ian Jackson <ian.jackson.citrix.com>
Committed-by: Ian Jackson <ian.jackson.citrix.com>

diff --git a/tools/libxl/libxl_qmp.c b/tools/libxl/libxl_qmp.c
index b6f30051183063356f81e0c500cc3ee315060c35..618f20fd860a08cde8eb893c99ed73b8381c22ff 100644 (file)
--- a/tools/libxl/libxl_qmp.c
+++ b/tools/libxl/libxl_qmp.c
@@ -87,7 +87,7 @@ static int store_serial_port_info(libxl__qmp_handler *qmp,
     int ret = 0;
 
     if (!(chardev && strncmp("pty:", chardev, 4) == 0)) {
-        return -1;
+        return 0;
     }
 
     path = libxl__xs_get_dompath(&gc, qmp->domid);