usb_buffer_dmasync_sg(9) centos man page | unix.com

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 3.10					     June 2014						   USB_BUFFER_DMASYNC_S(9)