sata_down_spd_limit
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## Name

sata_down_spd_limit — adjust SATA spd limit downward

## Synopsis

`int sata_down_spd_limit (` | struct ata_port * | ap`)`;

## Arguments

`ap`

  Port to adjust SATA spd limit for

## Description

Adjust SATA spd limit of `ap` downward. Note that this function only adjusts the limit. The change must be applied using `sata_set_spd`.

## LOCKING

Inherited from caller.

## RETURNS

0 on success, negative errno on failure

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