ACK: [SRU] [H/Unstable/OEM-5.10] [PATCH 0/1] Fix non-working GPU on Some HP desktops

[Stefan Bader]

On 07.06.21 18:39, Kai-Heng Feng wrote:
> BugLink: https://bugs.launchpad.net/bugs/1931147
> 
> [Impact]
> Integrated GPU on AMD based HP desktop doesn't work.
> 
> [Fix]
> Coalesce host bridge contiguous apertures so the resources requested by
> child devices can be met.
> 
> [Test]
> Boot affected systems. No picture from the iGPU.
> With the patch applied, iGPU can work normally.
> 
> [Where problems could occur]
> Assume there are device A and device B and they request overlapped
> resource region, the original logic may not be able to allocate enough
> resource for A so device B claimed the resource in the end.
> 
> Once the fix is applied, the region may be big enough for device A,
> hence device B won't be able to get the resource it needs.
> 
> Hopefully we don't have such broken systems.
> 
> Kai-Heng Feng (1):
>    PCI: Coalesce host bridge contiguous apertures
> 
>   drivers/pci/probe.c | 49 +++++++++++++++++++++++++++++++++++++++++----
>   1 file changed, 45 insertions(+), 4 deletions(-)
> 
Acked-by: Stefan Bader <stefan.bader at canonical.com>

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