ata_qc_issue
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## Name

ata_qc_issue — issue taskfile to device

## Synopsis

`void ata_qc_issue (` | struct ata_queued_cmd * qc`)`;

## Arguments

`qc`

  command to issue to device

## Description

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.

## LOCKING

spin_lock_irqsave(host lock)

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