struct usb_sg_reques(9)
NAME
struct_usb_sg_request - support for scatter/gather I/O
SYNOPSIS
struct usb_sg_request {
int status;
size_t bytes;
};
MEMBERS
- status
- zero indicates success, else negative errno
- bytes
- counts bytes transferred.
DESCRIPTION
These requests are initialized using usb_sg_init, and then are used as
request handles passed to usb_sg_wait or usb_sg_cancel. Most members of
the request object arenīt for driver access.
The status and bytecount values are valid only after usb_sg_wait
returns. If the status is zero, then the bytecount matches the total
from the request.
After an error completion, drivers may need to clear a halt condition
on the endpoint.