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Bug 157902

Summary: [PATCH] ata_piix fails on some ICH7 hardware
Product: Red Hat Enterprise Linux 4 Reporter: wingc
Component: kernelAssignee: Jeff Garzik <jgarzik>
Status: CLOSED ERRATA QA Contact: Brian Brock <bbrock>
Severity: medium Docs Contact:
Priority: medium    
Version: 4.0CC: davej, peterm
Target Milestone: ---   
Target Release: ---   
Hardware: All   
OS: Linux   
Fixed In Version: RHSA-2006-0575 Doc Type: Bug Fix
Doc Text:
Story Points: ---
Clone Of: Environment:
Last Closed: 2006-08-10 21:06:20 UTC Type: ---
Regression: --- Mount Type: ---
Documentation: --- CRM:
Verified Versions: Category: ---
oVirt Team: --- RHEL 7.3 requirements from Atomic Host:
Cloudforms Team: --- Target Upstream Version:
Bug Depends On:    
Bug Blocks: 181409    
Description Flags
patch for ata_piix.c, from Gregory Felix <> none

Description wingc 2005-05-16 21:20:28 UTC
Description of problem:

The most recent RHEL4 beta kernel (2.6.9-6.37.EL) includes support for the ICH7
SATA controllers, but this fails to work properly on my hardware. (HP xw4300
workstation, ATA controller set to 'separate controller mode' in BIOS)

The kernel reports the error message:

ata_piix: probe of 0000:00:1f.2 failed with error -5

This problem has already been reported on the linux-kernel mailing list. A patch
was posted to the list which solves the problem for me, however this patch has
not yet made it into the official kernel, or the 'libata' repository maintained
by Jeff Garzik.

Version-Release number of selected component (if applicable):

RHEL4 beta kernel, 2.6.9-6.37.EL

How reproducible:


Steps to Reproduce:
1. try to load the ata_piix driver with an ICH7 controller (8086:27c0)
Actual results:

The kernel reports error message:
ata_piix: probe of 0000:00:1f.2 failed with error -5

and does not attach the SATA controller.

Expected results:

the SATA controller should work

Additional info:

This problem was originally reported by Greg Felix on the linux kernel mailing
list. To find the original message search for:

From: 'Greg Felix <>'
Subject: 'PROBLEM: ICH7 SATA drive not detected.'
Date: 2005-02-26

Here is a link to the original message:

Greg later posted a patch which solves the problem (for me as well as for him):

References for this posting:

From: 'Greg Felix <>'
Subject: '[PATCH] ata_piix.c: check PCI sub-class code before AHCI disabling'
Date: 2005-03-05

Here is a link:

I included a copy of the posting with the patch as an attachment. Note that the
patch is whitespace-damaged, but otherwise applies to the current RHEL4 beta
kernel (2.6.9-6.37.EL).

Applying this patch solves the problem for me, and ata_piix works properly.

Comment 1 wingc 2005-05-16 21:20:28 UTC
Created attachment 114449 [details]
patch for ata_piix.c, from Gregory Felix <>

Comment 2 wingc 2005-05-17 14:31:39 UTC
Update: I emailed Greg yesterday. According to him, the patch is now queued for
inclusion in the 2.6 kernel (via Jeff Garzik).

So it should be safe to add it to RHEL4.

Comment 4 Jason Baron 2006-05-01 15:59:50 UTC
committed in stream U4 build 34.27. A test kernel with this patch is available

Comment 8 Red Hat Bugzilla 2006-08-10 21:06:21 UTC
An advisory has been issued which should help the problem
described in this bug report. This report is therefore being
closed with a resolution of ERRATA. For more information
on the solution and/or where to find the updated files,
please follow the link below. You may reopen this bug report
if the solution does not work for you.