Revised: 2000-Dec-05.This is the documentation of (hopefully) all possible error codes (andtheir interpretation) that can be returned from the host controller drivers and from usbcore.NOTE:The USB_ST_* codes are deprecated and are only listed for compatibility;new software should use only -E* instead!***************************************************************************                   Error codes returned by usb_submit_urb               ***************************************************************************Non-USB-specific:USB_ST_NOERROR0		URB submission went fine-ENOMEM		no memory for allocation of internal structures	USB-specific:-ENODEV		specified USB-device or bus doesn't existUSB_ST_REQUEST_ERROR-ENXIO		a control or interrupt URB is already queued to this endpoint; or		  a bulk URB is already queued to this endpoint and		  USB_QUEUE_BULK wasn't used (UHCI HCDs only)USB_ST_URB_INVALID_ERROR-EINVAL		a) Invalid transfer type specified (or not supported)		b) Invalid interrupt interval (0<=n<256)		c) more than one interrupt packet requested		d) ISO: number_of_packets is < 0-EAGAIN		a) specified ISO start frame too early		b) (using ISO-ASAP) too much scheduled for the future		   wait some time and try again.-EFBIG		too much ISO frames requested (currently uhci>900)USB_ST_STALL-EPIPE		specified pipe-handle is already stalled-EMSGSIZE	endpoint message size is zero, do interface/alternate settingUSB_ST_BANDWIDTH_ERROR-ENOSPC		The host controller's bandwidth is already consumed and		this request would push it past its allowed limit.-ESHUTDOWN	The host controller has been disabled due to some		problem that could not be worked around.***************************************************************************                   Error codes returned by in urb->status               **                   or in iso_frame_desc[n].status (for ISO)             ***************************************************************************USB_ST_NOERROR0			Transfer completed successfullyUSB_ST_URB_KILLED-ENOENT			URB was canceled by usb_unlink_urbUSB_ST_URB_PENDING-EINPROGRESS		URB still pending, no results yet			(actually no error until now;-)USB_ST_BITSTUFFUSB_ST_INTERNALERROR-EPROTO			a) bitstuff error			b) unknown USB error USB_ST_CRC-EILSEQ			CRC mismatchUSB_ST_STALL-EPIPE			endpoint stalledUSB_ST_BUFFEROVERRUN-ECOMM			During an IN transfer, the host controller			received data from an endpoint faster than it			could be written to system memoryUSB_ST_BUFFERUNDERRUN-ENOSR			During an OUT transfer, the host controller			could not retrieve data from system memory fast			enough to keep up with the USB data rateUSB_ST_DATAOVERRUN-EOVERFLOW		The amount of data returned by the endpoint was			greater than either the max packet size of the			endpoint or the remaining buffer size.  "Babble".USB_ST_DATAUNDERRUN-EREMOTEIO		The endpoint returned less than max packet size			and that amount did not fill the specified bufferUSB_ST_NORESPONSEUSB_ST_TIMEOUT-ETIMEDOUT		transfer timed out, NAKUSB_ST_REMOVED	-ENODEV			device was removedUSB_ST_SHORT_PACKET-EREMOTEIO		short packet detectedUSB_ST_PARTIAL_ERROR-EXDEV			ISO transfer only partially completed			look at individual frame status for detailsUSB_ST_URB_INVALID_ERROR-EINVAL			ISO madness, if this happens: Log off and go home-ECONNRESET		the URB is being unlinked asynchronously***************************************************************************              Error codes returned by usbcore-functions                 **           (expect also other submit and transfer status codes)         ***************************************************************************usb_register():-EINVAL			error during registering new driverusb_get_*/usb_set_*():			All USB errors (submit/status) can occur