Man page 9 : ata_scsi_find_dev

ata_scsi_find_dev - lookup ata_device from scsi_cmnd

struct ata_device * ata_scsi_find_dev(struct ata_port *  ap , const struct scsi_device *  scsidev );

ap
    ATA port to which the device is attached

scsidev
    SCSI device from which we derive the ATA device

Given various information provided in struct scsi_cmnd, map that onto an ATA bus, and using that mapping determine which ata_device is associated with the SCSI command to be sent.

spin_lock_irqsave(host lock)

Associated ATA device, or NULL if not found.

Jeff Garzik
    Author.