Regression: bug #81431 (v3.15..V3.16) pci=realloc fails to modify bridge windows, causing devices to fail BAR allocation

Regression: bug #81431 (v3.15..V3.16) pci=realloc fails to modify bridge windows, causing devices to fail BAR allocation

[TJ]

I've finally had the opportunity to bisect this regession down to:

  PCI: Restrict 64-bit prefetchable bridge windows to 64-bit resources

commit 5b28541552ef5eeffc41d6936105f38c2508e566
Author: Yinghai Lu <yinghai@kernel.org>
Date:   Mon May 19 17:01:55 2014 -0600

The patch is quite involved so could someone with familiarity with the allocation strategies take a look please?

https://bugzilla.kernel.org/show_bug.cgi?id=81431

Re: Regression: bug #81431 (v3.15..V3.16) pci=realloc fails to modify bridge windows, causing devices to fail BAR allocation

[Tj]

This regression is still present in 4.15-rc9. It's been ongoing since
3.16. Could someone take a look so it can finally be fixed?

https://bugzilla.kernel.org/show_bug.cgi?id=81431

On 17/06/15 19:11, TJ wrote:
> I've finally had the opportunity to bisect this regession down to:
> 
>  PCI: Restrict 64-bit prefetchable bridge windows to 64-bit resources
> 
> commit 5b28541552ef5eeffc41d6936105f38c2508e566
> Author: Yinghai Lu <yinghai@kernel.org>
> Date:   Mon May 19 17:01:55 2014 -0600
> 
> The patch is quite involved so could someone with familiarity with the
> allocation strategies take a look please?
> 
> https://bugzilla.kernel.org/show_bug.cgi?id=81431
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Re: Regression: bug #81431 pci=realloc fails to modify bridge windows, causing devices to fail BAR allocation

[Tj]

This regression is still present in 4.15-rc9. It's been ongoing since
3.16. Could someone take a look so it can finally be fixed?

I've been trying to adapt the three patches I originally identified from
Yinghailu's for-pci-v4.1-rc8 branch onto the current mainline, and
linux-next,  but he did a forced rebase and the branch commits changed
with some being removed.

https://bugzilla.kernel.org/show_bug.cgi?id=81431

On 17/06/15 19:11, TJ wrote:
> I've finally had the opportunity to bisect this regession down to:
> 
>  PCI: Restrict 64-bit prefetchable bridge windows to 64-bit resources
> 
> commit 5b28541552ef5eeffc41d6936105f38c2508e566
> Author: Yinghai Lu <yinghai@kernel.org>
> Date:   Mon May 19 17:01:55 2014 -0600
> 
> The patch is quite involved so could someone with familiarity with the
> allocation strategies take a look please?
> 
> https://bugzilla.kernel.org/show_bug.cgi?id=81431
> -- 
> To unsubscribe from this list: send the line "unsubscribe linux-pci" in
> the body of a message to majordomo@vger.kernel.org
> More majordomo info at  http://vger.kernel.org/majordomo-info.html