Re: [PATCH] pci: Only disable MSI/X and enable INTx if shutdown function has been called

[Keith Busch <keith.busch@intel.com>]

On Wed, Nov 09, 2016 at 02:36:23PM -0500, Prarit Bhargava wrote:
> 
> 
> On 11/09/2016 12:05 PM, Bjorn Helgaas wrote:
> > Hi Prarit,
> > 
> > Is there a bugzilla or other archive of configuration/dmesg/other info
> 
> [I have only added Bjorn and myself to the BZ below.  Please feel free to add
> yourself.]
> 
> Bjorn, unfortunately this won't be caught in a dmesg log because the filesystem
> is unmounted by the time we shutdown the PCI devices in the halt/reboot path.
> 
> The trace is only available from serial console, and I have opened up
> 
> https://bugzilla.kernel.org/show_bug.cgi?id=187351
> 
> to track this.
> 
> I have added some additional links to other bugzillas which seem to show the
> same behavior, and included a full serial console capture of the boot to the BZ.
>  The end of the log shows the unhandled irq stack trace for irq 16.

Just researching where this came from, the behavior to shutdown msi/msix
and enable intx was done in commit d52877c7b1 for some kexec issue,
and I think that was wrong in the first place. We shouldn't be changing
interrupt configuration out from under the drivers.