The Linux-USB Host Side API | ||
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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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usb_fill_int_urb | Up | USB Core APIs |