Issue taskfile to device
void ata_qc_issue(struct ata_queued_cmd * qc);
qc
command to issue to device
Prepare an ATA command to submission to device. This includes mapping the data into a DMA-able area, filling in the S/G table, and finally writing the taskfile to hardware, starting the command.
spin_lock_irqsave(host lock)
Jeff Garzik
Author.