PERFORCE change 185296 for review

[Hans Petter Selasky]

http://p4web.freebsd.org/@@185296?ac=10

Change 185296 by hselasky at hselasky_laptop001 on 2010/11/01 08:41:32

	LibUSB documentation.
	
	PR:		usb/151851

Affected files ...

.. //depot/projects/usb/src/lib/libusb/libusb.3#27 edit

Differences ...

==== //depot/projects/usb/src/lib/libusb/libusb.3#27 (text+ko) ====

@@ -380,10 +380,14 @@
 .Pp
 .Ft int
 .Fn libusb_control_transfer "libusb_device_handle *devh" "uint8_t bmRequestType" "uint8_t bRequest" "uint16_t wValue" "uint16_t wIndex" "unsigned char *data" "uint16_t wLength" "unsigned int timeout"
-Perform a USB control transfer. Returns 0 on success, LIBUSB_ERROR_TIMEOUT 
-if the transfer timeout, LIBUSB_ERROR_PIPE if the control request was not 
-supported, LIBUSB_ERROR_NO_DEVICE if the device has been disconnected and 
-LIBUSB_ERROR code on other failure.
+Perform a USB control transfer. Returns the actual number of bytes
+transferred on success in the range from and including zero until and
+including
+.Xa wLength .
+On error a libusb error code is returned, for example
+LIBUSB_ERROR_TIMEOUT if the transfer timeout, LIBUSB_ERROR_PIPE if the
+control request was not supported, LIBUSB_ERROR_NO_DEVICE if the
+device has been disconnected or LIBUSB_ERROR code on other failure.
 .
 .Pp
 .Ft int