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 4.8.                 January 2017                   STRUCT USB_SG_REQUES(9)