USB_BUFFER_DMASYNC_S(9)                   USB Core APIs                   USB_BUFFER_DMASYNC_S(9)



NAME
       usb_buffer_dmasync_sg - synchronize DMA and CPU view of scatterlist buffer(s)

SYNOPSIS
       void usb_buffer_dmasync_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 synchronize

       n_hw_ents
           the positive return value from usb_buffer_map_sg

DESCRIPTION
       Use this when you are re-using a scatterlist's data buffers for another USB request.

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