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NAME

       ata_check_atapi_dma - Check whether ATAPI DMA can be supported

SYNOPSIS

       int ata_check_atapi_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_set lock)

RETURNS

       0 when ATAPI DMA can be used nonzero otherwise

AUTHOR

       Jeff Garzik.