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From: Clemens Ladisch on 19 Apr 2010 03:00
I got the following bug report:
| After upgrading kernel from 2.6.32 to 2.6.34-rc4 my Xonar DX stopped
| working. Kernel log has:
|
| [kernel] AV200 0000:09:04.0: PCI INT A -> GSI 17 (level, low) -> IRQ 17
| [kernel] invalid PCI I/O range
| [kernel] AV200 0000:09:04.0: PCI INT A disabled
| [kernel] ALSA device list:
| [kernel] No soundcards found.
|
| According to git bisect the culprit is:
|
| commit 977d17bb1749517b353874ccdc9b85abc7a58c2a
| Author: Yinghai Lu <yinghai(a)kernel.org>
| Date: Fri Jan 22 01:02:24 2010 -0800
| PCI: update bridge resources to get more big ranges in PCI assign unssigned

Unfortunately, the bug tracker is dead, so I cannot ask for further
information. (If somebody renews the domain, this report will be at
<https://bugtrack.alsa-project.org/alsa-bug/view.php?id=4982>.)

The Xonar DX is a PCI chip with a 256-byte I/O range behind a PCI-E/PCI
bridge. The driver code that caught this looks as follows:

err = pci_enable_device(pci);
...
err = pci_request_regions(pci, DRIVER);
...
if (!(pci_resource_flags(pci, 0) & IORESOURCE_IO) ||
pci_resource_len(pci, 0) < OXYGEN_IO_SIZE) {
snd_printk(KERN_ERR "invalid PCI I/O range\n");


Regards,
Clemens
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