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Re: iwlwifi warn_slowpath with 3.*

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>>> > Hello,
>>> >
>>> > since linux-3.0 (I don't remember if it was the case even before), I'm getting
>>> > this output in dmesg:
>>> >
>>> > [   53.662990] ------------[ cut here ]------------
>>> > [   53.663016] WARNING: at drivers/iommu/intel-iommu.c:2911
>>> > intel_unmap_page+0x14b/0x180()
>>> > [   53.663047] Hardware name: Latitude E5420
>>> > [   53.663066] Driver unmaps unmatched page at PFN ffd1a000
>>>
>>>
>>> I see that I always get the same addr passed to the unmap function:
>>>
>>> [   23.950535] Driver unmaps unmatched page at PFN ffd1a000
>>>
>>> is it a coincidence?
>>> I'm running linux-3.3.3 right now. I can try wireless-testing if it would help.
>>
>> Just for the record, we are seeing a similar problem on RHEL 6.3
>> (which has an iwlwifi driver derived from linux-3.2).
>>
>>        https://bugzilla.redhat.com/show_bug.cgi?id=815998
>>
>
> John I want to hope that this bugzilla would be solved by Johannes
> rework of the locks:
>
> 08ae86ac3f9d9c9a60d2883c82cd72a5c66b94db in wireless-next.
> There are a few patches that completely rewrite the locking model of the driver.

Especially this one:

7b11488fbbbe06ada39a396dec16532db8c933e6
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