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 2.6. November 2013 ATAPI_CHECK_DMA(9)[top]
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