Re: usb-storage bug in 2.6.12-rc3

["E. Oltmanns" <oltmanns@uni-bonn.de>]

Kay Sievers <kay.sievers@vrfy.org> wrote:
> On Wed, 2005-04-27 at 16:21 -0400, David Zeuthen wrote:
>> it seems that recent kernels (I'm using the Fedora 2.6.11-1.1268_FC4
>> kernel which I believe is based off 2.6.12-rc3 and AFAIK it doesn't have
>> any invasive patches in that area) has changed behavior wrt hotplug
>> event ordering. In [1], I've attached the debug output from
>> linux-hotplug. Here are the interesting bits:
>
>>  729 scsi_host               path=/class/scsi_host/host9                         
>>                       physdevpath=/devices/pci0000:00/0000:00:1d.1/usb3/3-2/3-2:1.0/host9
>> 
>>  730 usb (interface)         path=/devices/pci0000:00/0000:00:1d.1/usb3/3-2/3-2:1.0
>
> Btw: This happens only if the modules are already loaded. If the device
> causes the module-load everything looks sane. That must be the reason
> I've never seen HAL failing with this. :)

May I remind you that I've recently reported a problem on this list
which I suspect to be caused by timing problems similar to those discussed
here. In my case though, the problem occurred only when the module
usb-storage had to be loaded during hotplug event processing. You can
find the details of my problem in the Mail Message-ID:
<87br82sg0y.fsf@denkblock.local> with the subject
Once more udev/hotplug and usb-storage devices

If you tell me how to produce these listings as you provided them in
your mail, I can try to generate something useful to analyse my problem.
>
> == add device first time => 941 /devices/pci0000:00/0000:00:1d.1/usb3/3-1
> 942 /devices/pci0000:00/0000:00:1d.1/usb3/3-1/3-1:1.0
> 943 /module/usb_storage
> 944 /bus/usb/drivers/usb-storage
> 945 /class/scsi_host/host0
>
> == reconnect device => 959 /devices/pci0000:00/0000:00:1d.1/usb3/3-1
> 960 /class/scsi_host/host1
> 961 /devices/pci0000:00/0000:00:1d.1/usb3/3-1/3-1:1.0
>

Thank you very much,

Elias


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