Re: [PATCH] PCI/bwctrl: Fix NULL pointer deref on bus number exhaustion

["Wouter Bijlsma" <wouter@wouterbijlsma.nl>]

Hi Krzysztof,

> Would you be happy to provide your "Tested-by:" tag?

You can use 'Tested-by: Wouter Bijlsma <wouter@wouterbijlsma.nl>'

-Wouter


On Sun, Mar 23, 2025, at 1:56 PM, Krzysztof Wilczyński wrote:
> Hello,
> 
> > The patch is working, no kernel crashes and shutting down after hotplugging the Thunderbolt 4 dock does not hang anymore, thanks!
> 
> Thank you for testing!  Appreciated!
> 
> > I still see messages in the kernel log that 'devices behind bridge are unusable' because 'no bus can be assigned to them', 'Hotplug bridge without secondary bus, ignoring', etc. These all refer to the Thunderbolt 4 bridge. Adding "pci=hpbussize=0x33" to the kernel doesn't make a difference. Adding "pci=realloc,asssign-busses,hpbussize=0x33" actually does 'fix' the bus allocation failures (or at least I don't see any messages in the log anymore), but then amdgpu fails to initialize the IGP.
> 
> We can fix any outstanding issues or drop this patch.  I leave it to hot
> plug experts like Ilpo, Bjorn and Lukas to make the call here.
> 
> > Anyway, all devices connected to the Thunderbolt 4 dock appear to work (USB, screens, ethernet) even despite these bus allocation failures, so I will just ignore them. 
> > 
> > Thanks again!
> 
> Would you be happy to provide your "Tested-by:" tag?
> 
> Krzysztof
>