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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)

RETURN
       0 when ATAPI DMA can be used nonzero otherwise

AUTHOR
       Jeff Garzik
           Author.

COPYRIGHT
Kernel Hackers Manual 4.8.                 January 2017                        ATAPI_CHECK_DMA(9)


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