Name

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

Synopsis

void usb_buffer_dmasync_sg (struct usb_device *  dev,
 unsigned  pipe,
 struct scatterlist *  sg,
 int  n_hw_ents);

Arguments

dev

device to which the scatterlist will be mapped

pipe

endpoint defining the mapping 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.