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

[Arend van Spriel <arend.vanspriel@broadcom.com>]

On 29/07/2026 13:48, Bogdan Nicolae wrote:
>> On Wed, Jul 29, 2026, 04:48 Arend van Spriel 
>> <arend.vanspriel@broadcom.com <mailto:arend.vanspriel@broadcom.com>> 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