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Re: b43 crashes on rmmod (bcm4331)

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On 14/06/18 19:26, Michael Büsch wrote:
> On Thu, 14 Jun 2018 12:47:19 +0300
> Wirz <spam@xxxxxxxxxxxxx> wrote:
> 
>>>>>> You can edit drivers/net/wireless/broadcom/b43/Kconfig
>>>>>> go to the section config B43_HWRNG
>>>>>> and change 'default y' to 'default n'
>>>>>>
>>>>>> That should disable it.    
>>>>>
>>>>>
>>>>>
>>>>> Could you please also try the attached patch?
>>>>> There seems to be a problem in hwrng core in that it does not disable
>>>>> the current RNG, if the new RNG fails to initialize.
>>>>> I don't know if that's the problem here, though.    
>>>>
>>>> Ok. Do I apply your patch to the first version that fails for me, and
>>>> revert my change to Kconfig?  
>>>
>>>
>>> Yes, please test the patch with a version that would otherwise fail.
>>> You can use 4.16 or the latest kernel for that. I created it with latest
>>> linus' version.  
>>
>> I tested both suggested cases.  When I disable B43_HWRNG by editing
>> Kconfig, 'rmmod b43' succeeds in the first version where it previously
>> failed.  When I apply your patch on top of an unmodified 4.16 it also
>> succeeds.
> 
> 
> Thank you _very_ much for testing.
> 
> I will submit this patch to the hw_random maintainers.

Great, thank you!  I look forward to using a current kernel again.

cheers, lukas


-- 
Do not believe the naysayers who say it cannot be done.

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