Re: Current mainline brcmfmac reports error on supposedly supported ap6256 chip

On 7/26/2021 2:21 PM, Piotr Oniszczuk wrote:

Arend,

Neil Armstrong hinted me issue might be related to usage of memcpy() to/from an iomem mapping.
arm64 memcpy update (285133040e6c ("arm64: Import latest memcpy()/memmove() implementation")) triggers a memory abort when dram-access-quirk
is used on the G12A/G12B platforms.

I reverted https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git/commit/drivers/mmc/host/meson-gx-mmc.c?h=v5.13.4&id=103a5348c22c3fca8b96c735a9e353b8a0801842

and got nicely working wifi.

So it looks root cause is amlogic specific - not brcmfmac.

Sorry for false report and many many thx for Your head-up!

Hi Piotr,

Thanks for letting me know. I hadn't worked yet on the patch I had in 
mind and I suspect it would not have helped.

Regards,
Arend