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.