piix_check_450nx_errata
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## Name

piix_check_450nx_errata — Check for problem 450NX setup

## Synopsis

`int piix_check_450nx_errata (` | struct pci_dev * ata_dev`)`;

## Arguments

`ata_dev`

  the PCI device to check

## Description

Check for the present of 450NX errata #19 and errata #25. If they are found return an error code so we can turn off DMA

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