table of contents
| USB_BUFFER_DMASYNC_S(9) | USB Core APIs | USB_BUFFER_DMASYNC_S(9) |
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.
COPYRIGHT¶
| May 2024 | Kernel Hackers Manual 2.6. |