Re: Booting a T5140 panics
I did - that's the commit that I mentioned there, 7d5ec3d3.
https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git/commit?id=7d5ec3d3
I reported it to linux-pci@ since it was there; I can easily go CC the
original author and linux-sparc@, but wasn't sure of the etiquette
involved, and didn't want to just blast multiple lists.
- Rich
On Sat, Nov 20, 2021 at 5:06 AM John Paul Adrian Glaubitz
<glaubitz@physik.fu-berlin.de> wrote:
>
> Hello Rich!
>
> On 11/20/21 07:38, Rich wrote:
> > Curiously, I didn't see other people's replies to my message, probably
> > due to not being subscribed. I figured at the point where I just
> > bought another SPARC, I might as well...
> >
> > I've done some digging into it. The short version is that commit
> > 7d5ec3d3 introduced the readl() at
> > https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git/tree/drivers/pci/msi.c?h=v5.14#n748
> > , and for reasons that are currently opaque to me not being familiar
> > with low-level SPARC details, that dies in a fire.
> >
> > Just short-circuiting it to 1 instead of calling readl() seems to
> > function fine for my system, but isn't a great general solution...
>
> I would suggest bisecting the kernel to this point where the breakage was
> introduced and report the bug to the author of the original change as well
> as the SPARC Linux kernel mailing list [1].
>
> Adrian
>
> > [1] http://vger.kernel.org/vger-lists.html#sparclinux
>
> --
> .''`. John Paul Adrian Glaubitz
> : :' : Debian Developer - glaubitz@debian.org
> `. `' Freie Universitaet Berlin - glaubitz@physik.fu-berlin.de
> `- GPG: 62FF 8A75 84E0 2956 9546 0006 7426 3B37 F5B5 F913
>
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