Index: uspace/lib/usbhid/include/usb/hid/request.h
===================================================================
--- uspace/lib/usbhid/include/usb/hid/request.h	(revision a76b01b4c041283e0438ad96862671d0c24b69ec)
+++ uspace/lib/usbhid/include/usb/hid/request.h	(revision 5a6cc679876514e29ac7899053554db66db754d9)
@@ -44,20 +44,20 @@
 
 
-int usbhid_req_set_report(usb_pipe_t *ctrl_pipe, int iface_no,
+errno_t usbhid_req_set_report(usb_pipe_t *ctrl_pipe, int iface_no,
     usb_hid_report_type_t type, uint8_t *buffer, size_t buf_size);
 
-int usbhid_req_set_protocol(usb_pipe_t *ctrl_pipe, int iface_no, 
+errno_t usbhid_req_set_protocol(usb_pipe_t *ctrl_pipe, int iface_no, 
     usb_hid_protocol_t protocol);
 
-int usbhid_req_set_idle(usb_pipe_t *ctrl_pipe, int iface_no, uint8_t duration);
+errno_t usbhid_req_set_idle(usb_pipe_t *ctrl_pipe, int iface_no, uint8_t duration);
 
-int usbhid_req_get_report(usb_pipe_t *ctrl_pipe, int iface_no, 
+errno_t usbhid_req_get_report(usb_pipe_t *ctrl_pipe, int iface_no, 
     usb_hid_report_type_t type, uint8_t *buffer, size_t buf_size, 
     size_t *actual_size);
 
-int usbhid_req_get_protocol(usb_pipe_t *ctrl_pipe, int iface_no, 
+errno_t usbhid_req_get_protocol(usb_pipe_t *ctrl_pipe, int iface_no, 
     usb_hid_protocol_t *protocol);
 
-int usbhid_req_get_idle(usb_pipe_t *ctrl_pipe, int iface_no, uint8_t *duration);
+errno_t usbhid_req_get_idle(usb_pipe_t *ctrl_pipe, int iface_no, uint8_t *duration);