• Tejun Heo's avatar
    libata-acpi: implement _GTM/_STM support · 64578a3d
    Tejun Heo authored
    Implement _GTM/_STM support.  acpi_gtm is added to ata_port which
    stores _GTM parameters over suspend/resume cycle.  A new hook
    ata_acpi_on_suspend() is responsible for storing _GTM parameters
    during suspend.  _STM is executed in ata_acpi_on_resume().  With this
    change, invoking _GTF is safe on IDE hierarchy and acpi_sata check
    before _GTF is removed.
    ata_acpi_gtm() and ata_acpi_stm() implementation is taken from Alan
    Cox's pata_acpi implementation.  ata_acpi_gtm() is fixed such that the
    result parameter is not shifted by sizeof(union acpi_object).
    Signed-off-by: default avatarTejun Heo <htejun@gmail.com>
    Cc: Alan Cox <alan@lxorguk.ukuu.org.uk>
    Signed-off-by: default avatarJeff Garzik <jeff@garzik.org>
libata-acpi.c 14.4 KB