Re: [v5.4 stable] arm: stm32: Regression observed on "no-map" reserved memory region

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On Wednesday 12 May 2021 at 12:55:53 (+0200), Alexandre TORGUE wrote:
> We saw that patches [1] and [2] cause issue on stable version (at least for
> 5.4). As you said issue can be seen with above device tree and check in
> /proc/iomem than gpu_reserved region is taken by the kernel as "System RAM".
> 
> On v5.10 stream there are no issues seen taking patches [1]&[2] and the
> reason is linked to patches [3]&[4] which have been introduced in v5.10.0.
> Reverting them give me the same behavior than on stable version.

Thanks for confirming. Given that the patches were not really fixes, I
think reverting is still the best option. I've sent reverts to -stable
for 5.4 and prior:

https://lore.kernel.org/stable/20210512122853.3243417-1-qperret@xxxxxxxxxx/

Cheers,
Quentin



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