Re: [PATCH 1/2] ACPI / PCI: don't allow PCI devices without irq to be enabled

[Prarit Bhargava <prarit@redhat.com>]

On 08/12/2013 06:32 PM, Bjorn Helgaas wrote:
> On Mon, Aug 12, 2013 at 3:32 PM, Yinghai Lu <yinghai@kernel.org> wrote:
>> On Mon, Aug 12, 2013 at 2:14 PM, Bjorn Helgaas <bhelgaas@google.com> wrote:
>>> On Thu, Aug 8, 2013 at 7:57 AM, Rafael J. Wysocki <rjw@sisk.pl> wrote:
>>>> On Thursday, August 08, 2013 03:35:13 PM Heikki Krogerus wrote:
>>>>> If there is no ACPI entry for the irq, returning error from
>>>>> acpi_pci_enable_irq() if the irq is 0.
>>>>>
>>>>> Prarit Bhargava reported an issue where he noticed that his
>>>>> Dell PowerEdge 840 has buggy BIOS that does not supply ACPI
>>>>> entries for irq with some devices. That lead into kernel
>>>>> generating a warning "genirq: Flags mismatch irq 0...". This
>>>>> will fix that issue.
>>>>>
>>>>> Signed-off-by: Heikki Krogerus <heikki.krogerus@linux.intel.com>
>>>>> Tested-by: Prarit Bhargava <prarit@redhat.com>
>>>>
>>>> Hi Bjorn,
>>>>
>>>> Any objections to this?
>>>
>>> Acked-by: Bjorn Helgaas <bhelgaas@google.com>
>>
>> some USB3 host controller does not have intx configured, but still
>> work with MSI?
> 
> Huh, OK, I take back my ack, at least while we investigate this.
> 

Bjorn, as suggested I've opened up a BZ here:

https://bugzilla.kernel.org/show_bug.cgi?id=62521

I've only cc'd yourself and Rafael.  Heikki -- I didn't find an account under
your intel.com address ...

P.