1ATAPI_CHECK_DMA(9)           libata Core Internals          ATAPI_CHECK_DMA(9)
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NAME

6       atapi_check_dma - Check whether ATAPI DMA can be supported
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SYNOPSIS

9       int atapi_check_dma(struct ata_queued_cmd * qc);
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ARGUMENTS

12       qc
13           Metadata associated with taskfile to check
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DESCRIPTION

16       Allow low-level driver to filter ATA PACKET commands, returning a
17       status indicating whether or not it is OK to use DMA for the supplied
18       PACKET command.
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LOCKING

21       spin_lock_irqsave(host lock)
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RETURNS

24       0 when ATAPI DMA can be used nonzero otherwise
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AUTHOR

27       Jeff Garzik
28           Author.
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31Kernel Hackers Manual 2.6.       November 2011              ATAPI_CHECK_DMA(9)
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