USB_BUFFER_UNMAP_SG(9)                    USB Core APIs                    USB_BUFFER_UNMAP_SG(9)



NAME
       usb_buffer_unmap_sg - free DMA mapping(s) for a scatterlist

SYNOPSIS
       void usb_buffer_unmap_sg(const struct usb_device * dev, int is_in,
                                struct scatterlist * sg, int n_hw_ents);

ARGUMENTS
       dev
           device to which the scatterlist will be mapped

       is_in
           mapping transfer direction

       sg
           the scatterlist to unmap

       n_hw_ents
           the positive return value from usb_buffer_map_sg

DESCRIPTION
       Reverses the effect of usb_buffer_map_sg.

COPYRIGHT
Kernel Hackers Manual 4.8.                 January 2017                    USB_BUFFER_UNMAP_SG(9)