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].


> [1] http://vger.kernel.org/vger-lists.html#sparclinux

 .''`.  John Paul Adrian Glaubitz
: :' :  Debian Developer - glaub...@debian.org
`. `'   Freie Universitaet Berlin - glaub...@physik.fu-berlin.de
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