The Linux-USB Host Side API
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usb_buffer_dmasync_sg

Name

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

Synopsis

void usb_buffer_dmasync_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 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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