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| author | Tejun Heo <htejun@gmail.com> | 2007-12-15 15:05:03 +0900 |
|---|---|---|
| committer | Jeff Garzik <jeff@garzik.org> | 2007-12-17 20:33:14 -0500 |
| commit | 398e07826b24cbeb5ff2f0a178367fc9d24cd475 (patch) | |
| tree | 78191583f2e1e5bb0aba9fbee8016e72285f4b31 /drivers/ata/pata_radisys.c | |
| parent | c05e6ff035c1b25d17364a685432b33937d3dc23 (diff) | |
libata-acpi: implement dev->gtf_cache and evaluate _GTF right after _STM during resume
On certain implementations, _GTF evaluation depends on preceding _STM
and both can be pretty picky about the configuration. Using _GTM
result cached during controller initialization satisfies the most
neurotic _STM implementation. However, libata evaluates _GTF after
reset during device configuration and the hardware state can be
different from what _GTF expects and can cause evaluation failure.
This patch adds dev->gtf_cache and updates ata_dev_get_GTF() such that
it uses the cached value if available. Cache is cleared with a call
to ata_acpi_clear_gtf().
Because for SATA ACPI nodes _GTF must be evaluated after _SDD which
can't be done till IDENTIFY is complete, _GTF caching from
ata_acpi_on_resume() is used only for IDE ACPI nodes.
Signed-off-by: Tejun Heo <htejun@gmail.com>
Signed-off-by: Jeff Garzik <jeff@garzik.org>
Diffstat (limited to 'drivers/ata/pata_radisys.c')
0 files changed, 0 insertions, 0 deletions