Re: commit 54f45a30c0 ("PCI/MSI: Add startup/shutdown for per device domains") causing boot hangs on my laptop

[Bjorn Helgaas <helgaas@kernel.org>]

[+cc Gene, Jens, Todd]

On Thu, Oct 02, 2025 at 10:04:17AM -0700, Kenneth Crudup wrote:
> 
> I'm running Linus' master (as of 7f7072574).
> 
> I bisected it to the above named commit (but had to back out ba9d484ed3
> (""PCI/MSI: Remove the conditional parent [un]mask logic") and then
> 727e914bbfbbd ("PCI/MSI: Check MSI_FLAG_PCI_MSI_MASK_PARENT in
> cond_[startup|shutdown]_parent()") first for a clean revert.)
> 
> I have a Dell XPS-9320 laptop, and booting would hang before it switched to
> the xe video driver from the EFI FB driver (not sure if this is a symptom or
> partial cause) and I'd see a message akin to "not being able to set up DP
> tunnels, destroying" as the last thing printed before it hangs. (If it's
> important to see those messages I believe I can force a pstore crash to get
> them where they can be saved off, let me know).

#regzbot introduced: 54f45a30c0 ("PCI/MSI: Add startup/shutdown for per device domains")
#regzbot link: https://lore.kernel.org/all/3152ca947e89ee37264b90c422e77bb0e3d575b9.camel@sapience.com/
#regzbot link: https://bugzilla.kernel.org/show_bug.cgi?id=220658