Re: xhci driver causes Kernel-Oops starting with kernel 3.16

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On 08/18/2014 06:59 PM, Manuel Reimer wrote:
> Hello,
> 
> I already opened a bug report for my problem here:
> 
> https://bugzilla.kernel.org/show_bug.cgi?id=82731#c1
> 
> Starting with Kernel 3.16 I get kernel Oops from time to time when booting my desktop system.
> 
> A reset helps to bring the system up without problems.
> 
> I've attached a dmesg dump to my bug report:
> https://bugzilla.kernel.org/attachment.cgi?id=147061
> 
> Thank you very much in advance for any help.
> 

Thanks for the report.
Looks like there are two issues here, first, for some reason it fails to read the xhci extended capability register sometimes.

Secondly, we fail at failing:) so if we fail in the middle of xhci_mem_init(), before all needed memory is allocated we still
call xhci_mem_cleanup() which will try to access and free things not yet allocated.

The second part should be easier to fix.

Did the same machine work with previous kernel versions?
How about if you compile xhci as a module, and load it, does it still fail sometimes?

-Mathias


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