Name

usb_buffer_unmap_sg — free DMA mapping(s) for a scatterlist

Synopsis

void usb_buffer_unmap_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 unmap

n_hw_ents

the positive return value from usb_buffer_map_sg

Description

Reverses the effect of usb_buffer_map_sg.