Re: [PATCH] wifi: brcmfmac: configure SAE PWE method for external SAE AP

[Arend van Spriel]

On 29/07/2026 13:48, Bogdan Nicolae wrote:
> > On Wed, Jul 29, 2026, 04:48 Arend van Spriel 
> > <arend.vanspriel@xxxxxxxxxxxx <mailto:arend.vanspriel@xxxxxxxxxxxx>> wrote:
> >
> >     On 29/07/2026 07:34, Bogdan Nicolae wrote:
> >      > When bringing up a WPA3-SAE SoftAP with external (user space)
> >     SAE, the
> >      > driver never told the firmware which SAE Password Element (PWE)
> >     method to
> >      > accept. The firmware was observed to corrupt its heap over time
> >     due to
> >      > this omission, leading to firmware trap (data abort in heap
> >     allocator).
> >      >
> >      > Parse the beacon IEs on start_ap() and set the extsae_pwe iovar
> >      > accordingly: 2 when the RSNX IE advertises H2E, 1 when an H2E-only
> >      > membership selector is present, 0 otherwise. This matches the
> >     behaviour
> >      > of the upstream/vendor driver and only applies to SAE-capable APs
> >     when
> >      > external SAE is supported.
> >
> >     This makes sense, but may I ask what device do you have? Suspect it
> >     is a
> >     Cypress/Infineon chip. I could not find the iovar in our (Broadcom bca)
> >     code base so I suspect it is vendor specific.
> Hi Arend,
>
> Indeed, this is a bcm43455 as found on Raspberry Pi SoCs.
Than we should only invoke the parse function for cyw vendor.

Regards,
Arend