USB_BUFFER_UNMAP(9) USB Core APIs USB_BUFFER_UNMAP(9)NAMEusb_buffer_unmap - free DMA mapping(s) for an urb
SYNOPSIS
void usb_buffer_unmap(struct urb * urb);
ARGUMENTS
urb
urb whose transfer_buffer will be unmapped
DESCRIPTION
Reverses the effect of usb_buffer_map.
COPYRIGHTKernel Hackers Manual 2.6. November 2013 USB_BUFFER_UNMAP(9)