Re: [PATCH] ata_piix.c: check PCI sub-class code before AHCI disabling

From: Jeff Garzik
Date: Thu Jul 28 2005 - 15:07:08 EST

Greg Felix wrote:
This patch adds functionality to check the PCI sub-class code of an
AHCI capable device before disabling AHCI. It fixes a bug where an
ICH7 sata controller is being setup by the BIOS as sub-class 1 (ide)
and the AHCI control registers weren't being initialized, thus causing
an IO error in piix_disable_ahci().

Greg Felix

Signed-off-by: Gregory Felix <greg.felix@xxxxxxxxx>

Applied to 2.6.x, and uploads to 'upstream' branch of libata-dev.git.

Will apply to 2.4.x as soon as Marcelo pulls what I just submitted.


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