usb_buffer_dmasync_sg (9) - Linux Manuals

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

NAME

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

SYNOPSIS

void usb_buffer_dmasync_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 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.

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