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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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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



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