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.