suse man page for usb_get_status

USB_GET_STATUS(9)						   USB Core APIs						 USB_GET_STATUS(9)

NAME
       usb_get_status - issues a GET_STATUS call

SYNOPSIS
       int usb_get_status(struct usb_device * dev, int type, int target, void * data);

ARGUMENTS
       dev
	   the device whose status is being checked

       type
	   USB_RECIP_*; for device, interface, or endpoint

       target
	   zero (for device), else interface or endpoint number

       data
	   pointer to two bytes of bitmap data

CONTEXT
       !in_interrupt ()

DESCRIPTION
       Returns device, interface, or endpoint status. Normally only of interest to see if the device is self powered, or has enabled the remote
       wakeup facility; or whether a bulk or interrupt endpoint is halted ("stalled").

       Bits in these status bitmaps are set using the SET_FEATURE request, and cleared using the CLEAR_FEATURE request. The usb_clear_halt
       function should be used to clear halt ("stall") status.

       This call is synchronous, and may not be used in an interrupt context.

       Returns the number of bytes received on success, or else the status code returned by the underlying usb_control_msg call.

COPYRIGHT
Kernel Hackers Manual 2.6.					     July 2010							 USB_GET_STATUS(9)