Bug 191109

Summary:	Compiler bug causes detection loop in matroxfb_probe to fail
Product:	[Fedora] Fedora	Reporter:	Ian Romanick <idr>
Component:	gcc	Assignee:	Jakub Jelinek <jakub>
Status:	CLOSED RAWHIDE	QA Contact:
Severity:	medium	Docs Contact:
Priority:	medium
Version:	5	CC:	dwmw2
Target Milestone:	---
Target Release:	---
Hardware:	powerpc
OS:	Linux
Whiteboard:
Fixed In Version:	4.1.0-14	Doc Type:	Bug Fix
Doc Text:		Story Points:	---
Clone Of:		Environment:
Last Closed:	2006-05-09 06:45:11 UTC	Type:	---
Regression:	---	Mount Type:	---
Documentation:	---	CRM:
Verified Versions:		Category:	---
oVirt Team:	---	RHEL 7.3 requirements from Atomic Host:
Cloudforms Team:	---	Target Upstream Version:
Embargoed:

Description Ian Romanick 2006-05-08 22:33:16 UTC

Description of problem:

matroxfb fails to detect GXT135P (PCI Matrox G450).

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


How reproducible:

Try to load the matroxfb module on a PowerPC system with a GXT135P card installed.

Steps to Reproduce:
1.
2.
3.
  
Actual results:


Expected results:


Additional info:

I have submitted this bug against gcc4 because I have been told by various
people that the root problem is a compiler issue in GCC 4.1.0 and GCC 4.0.x.  I
inserted some debug messages in the detection loop in matroxfb_probe, and I was
able to convince myself that this is the case.

As far as I know, this GCC bug *only* affects PowerPC.

Comment 1 David Woodhouse 2006-05-08 22:42:30 UTC

Can you give a GCC PR#, or some more details of precisely where the
miscompilation is?

Comment 2 Jakub Jelinek 2006-05-09 06:45:11 UTC

Which means it is fixed in rawhide GCC and will show up in FC5 updates testing
within a week.