usb_buffer_unmap(9) centos man page | unix.com

USB_BUFFER_UNMAP(9)						   USB Core APIs					       USB_BUFFER_UNMAP(9)

NAME
       usb_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.

COPYRIGHT
Kernel Hackers Manual 3.10					     June 2014						       USB_BUFFER_UNMAP(9)