[PATCH 4/5] staging: vchiq_arm: Create keep-alive thread during probe

[Stefan Wahren]

Am 28.06.25 um 00:28 schrieb Maíra Canal:
> Hi Stefan,
>
> On 27/06/25 12:18, Stefan Wahren wrote:
>> Hi Maíra,
>>
>> Is this reproducible with a real Raspberry Pi 3 (Plus)?
>
> Yes, it is. It's also reproducible in a RPi 4 with the downstream
> kernel. As RPi OS loads all those media-related modules, to easily
> reproduce the error in RPi OS (without dealing with systemd and such),
> you can just add the following modules to the modprobe blacklist:
>
> blacklist snd_bcm2835
> blacklist bcm2835_v4l2
>
> # only for rpi4
> blacklist bcm2835_codec
> blacklist bcm2835_isp
> blacklist bcm2835_mmal_vchiq
>
> Reboot the device, wait a couple of minutes (2-3 minutes), and you will
> get the warning in the dmesg output.
>
>>
>> Do you use arm64/defconfig or a special kernel configuration?
>
> defconfig
Okay, after disabling all VCHIQ users including VCHIQ_CDEV and enabling 
DETECT_HUNG_TASK, i was able to reproduce it.

I will try to fix that.