CABLE_IS_40WIRE(9)                    libata Core Internals                    CABLE_IS_40WIRE(9)



NAME
       cable_is_40wire - 40/80/SATA decider

SYNOPSIS
       int cable_is_40wire(struct ata_port * ap);

ARGUMENTS
       ap
           port to consider

DESCRIPTION
       This function encapsulates the policy for speed management in one place. At the moment we
       don't cache the result but there is a good case for setting ap->cbl to the result when we
       are called with unknown cables (and figuring out if it impacts hotplug at all).

       Return 1 if the cable appears to be 40 wire.

AUTHOR
       Jeff Garzik
           Author.

COPYRIGHT
Kernel Hackers Manual 4.8.                 January 2017                        CABLE_IS_40WIRE(9)