comedi_poll — force updating of streaming buffer
|comedi_t * device,|
|unsigned int subdevice|
comedi_poll is used on a subdevice that has a
Comedi command in progress in order to update the streaming buffer.
If supported by the driver, all available samples are copied to
the streaming buffer. These samples may be pending in DMA buffers
or device FIFOs.
Only a few Comedi drivers support this operation.