Name

usb_buffer_unmap_sg — free DMA mapping(s) for a scatterlist

Synopsis

void usb_buffer_unmap_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 unmap

n_hw_ents

the positive return value from usb_buffer_map_sg

Description

Reverses the effect of usb_buffer_map_sg.