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Re: brcmfmac4356-pcie 4.13 regression (frequent kernel panics) not fixed by recent 4.13 regression fix

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+ ref

On 26-07-17 23:08, Arend van Spriel wrote:
> On 26-07-17 23:03, Hans de Goede wrote:
>> Hi,
>>
>> I've been seeing frequent kernel panics on wifi activity
>> (scp-ing a lot of files) with 4.13 on 2 different systems
>> which both use a brcmfmac4356-pcie wifi chip.
>>
>> This is with this fix:
>> https://www.spinics.net/lists/linux-wireless/msg164178.html
>> already applied.
>>
>> Here is a picture of the panic:
>>
>> https://fedorapeople.org/~jwrdegoede/brcmfmac4356-pcie-4.13-panic.jpg
>>
>> Reverting commit 270a6c1f65fe ("brcmfmac: rework headroom check in
>> .start_xmit()"):
>> https://git.kernel.org/pub/scm/linux/kernel/git/torvalds/linux.git/commit?id=270a6c1f65fe68a28a5d39cd405592c550b496c7
>>
>>
>> seems to fix this (I can no longer quickly reproduce the panic
>> by scp-ing a large amount of files).
>>
>> Note I've first reverted the:
>> https://www.spinics.net/lists/linux-wireless/msg164178.html
>> fix so that I could cleanly revert commit 270a6c1f65fe.
>>
>> Given that no code seems to use the statics commit 270a6c1f65fe
>> offers and it has been the cause of 2 different regressions now,
>> it might be best to just revert 270a6c1f65fe for 4.13.
> 
> Hi Hans,
> 
> I suspect this patch [1] fixes that. Can you verify? And yes, I messed
> up. Sorry.
> 
> Regards,
> Arend

[1] https://patchwork.kernel.org/patch/9864575/



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