usb_buffer_unmap_sg (9) - Linux Manuals
usb_buffer_unmap_sg: free DMA mapping(s) for a scatterlist
NAME
usb_buffer_unmap_sg - free DMA mapping(s) for a scatterlist
SYNOPSIS
-
void usb_buffer_unmap_sg(const struct usb_device
* dev, intis_in, struct scatterlist * sg, intn_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.
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