1STRUCT USB_SG_REQUES(9) Host-Side Data Types and Macro STRUCT USB_SG_REQUES(9)
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NAME

6       struct_usb_sg_request - support for scatter/gather I/O
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SYNOPSIS

9       struct usb_sg_request {
10         int status;
11         size_t bytes;
12       };
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MEMBERS

15       status
16           zero indicates success, else negative errno
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18       bytes
19           counts bytes transferred.
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DESCRIPTION

22       These requests are initialized using usb_sg_init, and then are used as
23       request handles passed to usb_sg_wait or usb_sg_cancel. Most members of
24       the request object aren't for driver access.
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26       The status and bytecount values are valid only after usb_sg_wait
27       returns. If the status is zero, then the bytecount matches the total
28       from the request.
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30       After an error completion, drivers may need to clear a halt condition
31       on the endpoint.
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34Kernel Hackers Manual 3.10         June 2019           STRUCT USB_SG_REQUES(9)
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