Re: 2.6.19-rc4: known unfixed regressions (v3)

Eric W. Biederman
2006-11-05T15:18:35Z

Adrian Bunk <bunk@stusta.de> writes:

> This email lists some known regressions in 2.6.19-rc4 compared to 2.6.18
> that are not yet fixed in Linus' tree.
>
> If you find your name in the Cc header, you are either submitter of one
> of the bugs, maintainer of an affectected subsystem or driver, a patch
> of you caused a breakage or I'm considering you in any other way possibly
> involved with one or more of these issues.
>
> Due to the huge amount of recipients, please trim the Cc when answering.
>
>
> Subject : ipath driver MCEs system on load when HT chip present
> References : http://bugzilla.kernel.org/show_bug.cgi?id=7455
> Submitter : Bryan O'Sullivan <bos@serpentine.com>
> Caused-By : Eric W. Biederman <ebiederm@xmission.com>
> Status : unknown

Status in problem is being debugged. I have posted some infrastructure
patches that should allow Bryan to fix his driver cleanly.

I did not cause this. The ipath HTX card driver's irq handling has
never been anything but a hack. It has never worked correctly even in
the instances it worked. It only worked on i386 or x86_64 when
CONFIG_PCI_MSI was enabled but did not use MSI. It was relying on the
implementation detail that the architecture specific vector number was
placed in the dev->irq. dev->irq is actually meaningless on this card
as it doesn't have any ordinary pci interrupts.

So while I am happy to take credit for flushing this bug out I did not
introduce it.

Eric