ATAPI_CHECK_DMA(9) libata Core Internals ATAPI_CHECK_DMA(9)
NAME
atapi_check_dma - Check whether ATAPI DMA can be supported
SYNOPSIS
int atapi_check_dma(struct ata_queued_cmd * qc);
ARGUMENTS
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)
RETURNS
0 when ATAPI DMA can be used nonzero otherwise
AUTHOR
Jeff Garzik
Author.
COPYRIGHT
Kernel Hackers Manual 3.10 June 2014 ATAPI_CHECK_DMA(9)
