libata-acpi: implement _GTM/_STM support
authorTejun Heo <htejun@gmail.com>
Mon, 14 May 2007 18:28:16 +0000 (03:28 +0900)
committerJeff Garzik <jeff@garzik.org>
Mon, 9 Jul 2007 16:17:32 +0000 (12:17 -0400)
commit64578a3de723d502621860f9d4d28f34d001b066
tree821e7ad8e8d6c3a0f3224b479ff000e00001a165
parente5fa24dfdb522b642dbe9b8b1b692f68dce89835
libata-acpi: implement _GTM/_STM support

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: Tejun Heo <htejun@gmail.com>
Cc: Alan Cox <alan@lxorguk.ukuu.org.uk>
Signed-off-by: Jeff Garzik <jeff@garzik.org>
drivers/ata/libata-acpi.c
drivers/ata/libata-eh.c
drivers/ata/libata.h
include/linux/libata.h