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struct_usb_sg_request
Langue: en
Version: May 2009 (fedora - 06/07/09)
Section: 9 (Appels noyau Linux)
NAME
struct_usb_sg_request - support for scatter/gather I/OSYNOPSIS
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.
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