STRUCT
USB_SG_REQUES(9) Host-Side Data Types and Macro 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 aren't 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.
COPYRIGHT
Kernel Hackers Manual 2.6. July 2010 STRUCT USB_SG_REQUES(9)
