Index: uspace/lib/usbvirt/src/virthub_base.c
===================================================================
--- uspace/lib/usbvirt/src/virthub_base.c	(revision 49f2f29258b1ba2af8b8eca8fa7c9b977272ecce)
+++ uspace/lib/usbvirt/src/virthub_base.c	(revision e211ea04fccf33d4cb2092f630a29e893e096a02)
@@ -54,5 +54,5 @@
 }
 
-int virthub_base_init(virthub_base_t *instance, const char *name,
+errno_t virthub_base_init(virthub_base_t *instance, const char *name,
     usbvirt_device_ops_t *ops, void *data,
     const usb_standard_device_descriptor_t *device_desc,
@@ -109,5 +109,5 @@
 }
 
-int virthub_base_request(virthub_base_t *instance, usb_target_t target,
+errno_t virthub_base_request(virthub_base_t *instance, usb_target_t target,
     usb_direction_t dir, const usb_device_request_setup_packet_t *setup,
     void *buffer, size_t buffer_size, size_t *real_size)
@@ -143,5 +143,5 @@
 }
 
-int virthub_base_get_hub_descriptor(usbvirt_device_t *dev,
+errno_t virthub_base_get_hub_descriptor(usbvirt_device_t *dev,
     const usb_device_request_setup_packet_t *request, uint8_t *data,
     size_t *act_size)
@@ -159,5 +159,5 @@
 }
 
-int virthub_base_get_null_status(usbvirt_device_t *dev,
+errno_t virthub_base_get_null_status(usbvirt_device_t *dev,
     const usb_device_request_setup_packet_t *request, uint8_t *data,
     size_t *act_size)