Provided by:
linux-doc-2.6.15_2.6.15-23.39_all 
NAME
atapi_packet_task - Write CDB bytes to hardware
SYNOPSIS
void atapi_packet_task (void * _data);
ARGUMENTS
_data Port to which ATAPI device is attached.
DESCRIPTION
When device has indicated its readiness to accept a CDB, this function
is called. Send the CDB. If DMA is to be performed, exit immediately.
Otherwise, we are in polling mode, so poll status under operation
succeeds or fails.
LOCKING
Kernel thread context (may sleep)
AUTHOR
Jeff Garzik.