Alan wrote:
On Thu, 22 Feb 2007 12:11:32 -0500
Jeff Garzik <[email protected]> wrote:
Alan wrote:
ACPI is the only way to do cable handling on the Nvidia PATA chipset. The
You failed to quote the salient part of the message. Disliking a
separate pata_acpi driver in no way invalidates your statement (quoted
above).
If you drive a device by the ACPI interface you don't get to fiddle with
it directly or you end up in a murky world of undefined and ungood
behaviour. Testing and vendor information both say pata_acpi is the right
way to drive Nvidia PATA ports.
Couldn't be do this generically inside libata core somehow, i.e. try to
use ACPI to set the proper mode and fall back to the driver-specific
mode setting code if that didn't work? I think if we could do that it
would solve a number of problems (i.e. we could prevent it from doing
this on SATA controllers which appear to be IDE based on the PCI ID,
like the NVIDIA SATA controllers, since the _GTM and _STM methods seem
to have undefined behavior on SATA). This would also eliminate the need
for mkinitrd, people, etc. to know that they're supposed to be loading
this other pata_acpi driver instead, since any PATA driver could take
advantage of this feature.
--
Robert Hancock Saskatoon, SK, Canada
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Home Page: http://www.roberthancock.com/
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