Re: [BUG] CoreSight: WARN_ON in coresight_disclaim_device_unlocked due to register reset on CPU power-cycle

[Keita Morisaki]

> We have the ETM driver performing the save/restore of ETM context during
> a CPUidle. This is only done when the ETM/ETE is described to be loosing
> context over PM operation. If this is not done (via DT), the driver
> doesn't do anything. This could be problematic. Could you try adding:
>
> "arm,coresight-loses-context-with-cpu"
>
>
> property to the ETE nodes and see if it makes a difference ?

I tried this in our environment, and this worked well. The "arm,coresight-loses-context-with-cpu" property was what we needed.
Thank you so much again for the swift response with the useful information!

Best,
Keita