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.TH "USB_SG_REQUEST" "9" "07 August 2003" "" ""
.SH NAME
struct usb_sg_request \- support for scatter/gather I/O
.SH SYNOPSIS

.nf
struct usb_sg_request {
  int status;
  size_t bytes;
};  
.fi
.SH "MEMBERS"
.TP
\fBstatus\fR
zero indicates success, else negative errno
.TP
\fBbytes\fR
counts bytes transferred.
.SH "DESCRIPTION"
.PP
These requests are initialized using \fBusb_sg_init\fR, and then are used
as request handles passed to \fBusb_sg_wait\fR or \fBusb_sg_cancel\fR.  Most
members of the request object aren't for driver access.
.PP
The status and bytecount values are valid only after \fBusb_sg_wait\fR
returns.  If the status is zero, then the bytecount matches the total
from the request.
.PP
After an error completion, drivers may need to clear a halt condition
on the endpoint.
.SH "ABOUT THIS DOCUMENT"
.PP
This documentation is free software; you can redistribute
it and/or modify it under the terms of the GNU General Public
License as published by the Free Software Foundation; either
version 2 of the License, or (at your option) any later
version.
.PP
This program is distributed in the hope that it will be
useful, but WITHOUT ANY WARRANTY; without even the implied
warranty of MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.
See the GNU General Public License for more details.
.PP
You should have received a copy of the GNU General Public
License along with this program; if not, write to the Free
Software Foundation, Inc., 59 Temple Place, Suite 330, Boston,
MA 02111-1307 USA
.PP
For more details see the file COPYING in the source
distribution of Linux.
.PP
If you have comments on the formatting of this manpage, then please contact
Michael Still (mikal@stillhq.com).
.PP
This documentation was generated with kernel version 2.6.0.