1USB_BUFFER_UNMAP_SG(9)           USB Core APIs          USB_BUFFER_UNMAP_SG(9)
2
3
4

NAME

6       usb_buffer_unmap_sg - free DMA mapping(s) for a scatterlist
7

SYNOPSIS

9       void usb_buffer_unmap_sg(const struct usb_device * dev, int is_in,
10                                struct scatterlist * sg, int n_hw_ents);
11

ARGUMENTS

13       dev
14           device to which the scatterlist will be mapped
15
16       is_in
17           mapping transfer direction
18
19       sg
20           the scatterlist to unmap
21
22       n_hw_ents
23           the positive return value from usb_buffer_map_sg
24

DESCRIPTION

26       Reverses the effect of usb_buffer_map_sg.
27

29Kernel Hackers Manual 2.6.       November 2011          USB_BUFFER_UNMAP_SG(9)
Impressum