[U-Boot] IO Error Propagation on Armada-385

[Luka Perkov]

Hello,

I'm including Marek as he might have a similar situation. Also,
extending the list with few guys from our side.

Thanks,
Luka

On Thu, Nov 21, 2019 at 9:28 AM Stefan Roese <sr at denx.de> wrote:
>
> Hi Chris,
>
> (added Kosta to Cc)
>
> On 21.11.19 08:43, Chris Packham wrote:
> > Hi Stefan and Luka,
> >
> > I was wondering if you could shed some light on this commit
> >
> > https://gitlab.denx.de/u-boot/u-boot/commit/501c098a1f2cdaa930cb1a7166d3724467890a64
> >
> > At $dayjob we're running into an issue where certain invalid PCI
> > accesses when running Linux lead to the CPU hanging. Setting the IO
> > Err Prop bit back to 1 seems to prevent the hang.
> >
> > Can you recall why u-boot needs this bit cleared? We'll probably need
> > to make the kernel restore the setting but I'd expect the kernel
> > maintainers to point out that we're essentially restoring the hardware
> > default so we'd need to explain that u-boot clears it because X but
> > the kernel needs it set.
>
> Frankly, I don't remember the details leading to this commit, sorry (too
> long ago). I also searched some older mails for any reference here, but
> failed so far.
>
> Perhaps Kosta or someone else at Marvell remembers the details here?
> Kosta, could you please take a look?
>
> Thanks,
> Stefan