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- jessie-backports 4.9.88-1+deb9u1~bpo8+1
- stretch 4.9.144-3
| 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¶
devdevice 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 2018 | Kernel Hackers Manual 4.9. |