Re: [PATCH v3 3/3] PCI: dwc: Enable MSI affinity support

[Jon Hunter <jonathanh@nvidia.com>]

On 20/01/2026 22:30, Radu Rendec wrote:

...

>> So it looks like it is hanging when disabling the non-boot CPUs. So far
>> it only appears to happen on Tegra194.
>>
>> Let me know if you have any suggestions.
> 
> Ouch. I'm afraid this is going to be much harder to figure out than the
> previous one, especially since I can't get access easily to a board to
> test on. I will try to reserve a board and reproduce the bug.
> 
> Meanwhile, if you (or someone else in your team) can spare a few cycles,
> could you please try to reproduce the bug again with the debug patch
> below applied, and a few other changes:
>   * enable debug messages in kernel/irq/cpuhotplug.c;
>   * save the contents of /proc/interrupts to a file before suspending;
>   * add "no_console_suspend" to the kernel command line (although it
>     looks like you already have it).
> 
> It will be much more verbose during suspend but hopefully we can at
> least figure out how far along it goes and how it's related to the MSI
> affinity configuration.


Thanks. I have dumped the boot log with the prints here:

https://pastebin.com/G8c2ssdt

And the dump of /proc/interrupts here:

https://pastebin.com/Wqzxw3r6

Looks like the last thing I see entering suspend is ...

  irq_chip_redirect_set_affinity: irq 162 mask 0x7f

That appears to be a PCIe interrupt. Let me know if there are more tests 
I can run.

Cheers
Jon

-- 
nvpublic