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Date: Fri, 22 May 2009 17:13:20 +0200
From: Wolfgang Grandegger <wg@domain.hid>
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Subject: Re: [Xenomai-help] IXXAT-PCI-CAN driver hijacks my pci board
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To: Sebastian Smolorz <Sebastian.Smolorz@domain.hid>
Cc: xenomai@xenomai.org

Sebastian Smolorz wrote:
> Hi Wolfgang,
> 
> Wolfgang Grandegger wrote:
>> Stefan Kisdaroczi wrote:
>>> Hi Wolfgang,
>>>
>>> Wolfgang Grandegger schrieb:
>>>> [...]
>>>>
>>>>>> dmesg output, there is no IXXAT-PCI-CAN board installed:
>>>>>>> RT-Socket-CAN 0.90.2 - (C) 2006 RT-Socket-CAN Development Team
>>>>>>> RTCAN SJA1000 driver initialized
>>>>>>> PCI: setting IRQ 12 as level-triggered
>>>>>>> IXXAT-PCI-CAN 0000:00:11.0: found PCI INT A -> IRQ 12
>>>>>>> IXXAT-PCI-CAN: Initializing device 10b5:9050:2503
>>>> OK, it finding a variant of the PLX9050, but it will not use the device
>>>> because of the following lines after the above printout:
>>>>
>>>>     if (sub_sys_id != IXXAT_PCI_SUB_SYS_ID)
>>>>              return -ENODEV;
>>>>
>>>> But ...
>>>>
>>>>>> The following patch fixed it for me (my own driver loads again).
>>>> ... obviously it does  not probe again.
>>> it probes again, but pci_request_regions() failed in my driver.
>>>
>>> In the -ENODEV case, the function pci_release_regions() is not
>>> called in the ixxat driver, so access is blocked for other drivers.
>> That's a bug. Will fix.
> 
> please see:
> 
> https://mail.gna.org/public/xenomai-core/2009-03/msg00055.html
> 
> I sent a patch for exactly this issue on March 10.

Obviously I missed that one as well, sorry. Will send a proper patch
later today or tomorrow. Sebastian, does that mean that you have an
IXXAT PCI card available for testing?

Wolfgang.