libxl: fix incorrect return of ERROR_INVAL from disk_try_backend

disk_try_backend is supposed to return 0 or the disk backend format.

Signed-off-by: Ian Jackson <ian.jackson@eu.citrix.com>

diff --git a/tools/libxl/libxl_device.c b/tools/libxl/libxl_device.c
index 0a00b246716b37d76961dec7711548eb6114d04e..0680211ec18f12edd1917e0135cda6c89d1dfa5e 100644 (file)
--- a/tools/libxl/libxl_device.c
+++ b/tools/libxl/libxl_device.c
@@ -145,7 +145,7 @@ static int disk_try_backend(disk_try_backend_args *a,
             LIBXL__LOG(ctx, LIBXL__LOG_DEBUG, "Disk vdev=%s, backend phy"
                        " unsuitable as phys path not a block device",
                        a->disk->vdev);
-            return ERROR_INVAL;
+            return 0;
         }
 
         return backend;