Name
atapi_check_dma —
Check whether ATAPI DMA can be supported
Synopsis
int atapi_check_dma ( | struct ata_queued_cmd * qc); |
Arguments
struct ata_queued_cmd * qc
Metadata associated with taskfile to check
Description
Allow low-level driver to filter ATA PACKET commands, returning
a status indicating whether or not it is OK to use DMA for the
supplied PACKET command.
LOCKING:
spin_lock_irqsave(host lock)
Return
0 when ATAPI DMA can be used
nonzero otherwise