Re: [Xen-devel] dom0 kernel fails to recognize DVD drive on piix controller

[Juergen Gross <jgross@xxxxxxxx>]

On 21/04/16 11:37, Olaf Hering wrote:
> On my Fujitsu Esprimo Mobile M9400 laptop the upstream dom0 kernel does
> not find the DVD drive. The DVD drive is found with native kernels and
> also with xenlinux based kernels, like 4.1 based openSUSE Leap.
> 
> [    6.242286] ata_piix 0000:00:1f.1: version 2.13
> [    6.242625] xen: registering gsi 19 triggering 0 polarity 1
> [    6.242635] Already setup the GSI :19
> [    6.250792] ata_piix: probe of 0000:00:1f.1 failed with error -22
> 
> After some investigation it turned out that irq_to_desc() returns
> nothing for the piix PCI device, as a result EINVAL is returned.
> The callchain is like:
>  piix_init_one
>   ata_pci_sff_activate_host (legacy_mode case)
>    devm_request_threaded_irq
>     irq_to_desc
> 
> This happens with 4.4, 4.5 and 4.6 based dom0 kernels.
> 
> Any idea whats happening here, where to look further?

You might want to test Stefano's patch trying to fix a similar issue:

http://lists.xen.org/archives/html/xen-devel/2016-04/msg02512.html


Juergen

> 
> I'm attaching a collection of logfiles, like dmesg, lspci and the used
> debug patch, along with the used .config for the dom0 kernel.
> 
> Thanks,
> 
> Olaf
> 
> 
> 
> _______________________________________________
> Xen-devel mailing list
> Xen-devel@xxxxxxxxxxxxx
> http://lists.xen.org/xen-devel
> 


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