ATAPI_CHECK_DMA
Section: libata Core Internals (9)
Updated: February 2011
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NAME
atapi_check_dma - Check whether ATAPI DMA can be supported
SYNOPSIS
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int atapi_check_dma(struct ata_queued_cmd * qc);
ARGUMENTS
qc
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- 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
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Author.
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