Re: Re: MSI error when reloading iwlagn module

[Jeremy Fitzhardinge <jeremy@goop.org>]

On 11/07/2011 02:08 AM, Jan Beulich wrote:
> Jeremy,
>
> are you still having this problem? If so, did you have time to look into it
> at least to some degree? Or alternatively, did you find other ways to
> reproduce this (so others - e.g. me - could try to look into it)?

I haven't had a chance to re-try it, but I will once I've stabilized F16.

    J

>
> Thanks, Jan
>
>>>> On 28.09.11 at 12:17, George Dunlap <George.Dunlap@eu.citrix.com> wrote:
>> Jeremy, can you try the attached patch (which reverts some of the
>> changes from c/s 23786:3a05da2dc7c0)?
>>  -George
>>
>> On Wed, Sep 28, 2011 at 9:33 AM, Jan Beulich <JBeulich@suse.com> wrote:
>>>>>> On 27.09.11 at 21:57, Jeremy Fitzhardinge <jeremy@goop.org> wrote:
>>>> Hi,
>>>>
>>>> With a fairly current kernel + xen, I'm seeing this if I rmmod iwlagn
>>>> and try to reload it:
>>>>
>>>> [51230.646678] Intel(R) Wireless WiFi Link AGN driver for Linux, in-tree:
>>>> [51230.646685] Copyright(c) 2003-2011 Intel Corporation
>>>> [51230.646760] xen: registering gsi 17 triggering 0 polarity 1
>>>> [51230.646773] xen_map_pirq_gsi: returning irq 17 for gsi 17
>>>> [51230.646777] xen: --> pirq=17 -> irq=17 (gsi=17)
>>>> [51230.646781] Already setup the GSI :17
>>>> [51230.646789] iwlagn 0000:03:00.0: PCI INT A -> GSI 17 (level, low) -> IRQ 17
>>>> [51230.646814] iwlagn 0000:03:00.0: setting latency timer to 64
>>>> [51230.646935] iwlagn 0000:03:00.0: pci_resource_len = 0x00002000
>>>> [51230.646941] iwlagn 0000:03:00.0: pci_resource_base = ffffc9000671c000
>>>> [51230.646945] iwlagn 0000:03:00.0: HW Revision ID = 0x35
>>>> [51230.647075] iwlagn 0000:03:00.0: xen map irq failed -22 for 32752 domain
>>>> [51230.647081] iwlagn 0000:03:00.0: pci_enable_msi failed
>>>> [51230.647113] iwlagn 0000:03:00.0: PCI INT A disabled
>>>> [51230.647126] iwlagn: probe of 0000:03:00.0 failed with error -22
>>>>
>>>> with this on the Xen console
>>>>
>>>> (XEN) physdev.c:139: dom0: can't create irq for msi!
>>>>
>>>>
>>>> I'm running Xen as of a422e2a4451e, which your MSI changes in them,
>>>> which I suspect of having caused a regression (since I don't remember
>>>> having problems reloading msi-using drivers before).
>>> Are you certain (i.e. did you try reverting the top 1 to 3 commits from
>>> there)? Alternatively, do you know what c/s last worked for you? Is
>>> this one the first removal, or after several of them?
>>>
>>> The message solely indicates a failure of create_irq(), with either
>>> find_unassigned_irq() or __assign_irq_vector() failing being the cause,
>>> none of which I touched recently. Instead I wonder whether
>>> 23812:32814ad7458d wouldn't be a more likely candidate (with
>>> 23815:9fa77d26a813 and 23816:7f357e1ef60a being less likely ones).
>>>
>>> I'll nevertheless see whether this reproduces with one of the MSI
>>> drivers that my machines have in use and allow easy removal/reload.
>>>
>>> Jan
>>>
>>>
>>> _______________________________________________
>>> Xen-devel mailing list
>>> Xen-devel@lists.xensource.com 
>>> http://lists.xensource.com/xen-devel 
>>>
>
>