Extended Capabilities bit values overwritten by the kernel

[Pablo MARTIN-GOMEZ]

Hello all,

I've encountered an issue with an ath12k & hostapd based AP: whatever 
value I put in `he_twt_responder` and `he_twt_responder` in the hostapd 
config, I always have the bit `TWT Responder Support` set to 1 in the 
Extended Capabilities IE. This happens because hostapd overwrites all 
the bit values of the Extended Capabilities bitmap set in the config 
with the values coming from the kernel (ext_capa_mask) since commit 
8cd6b7bce8b8f1fe2803bc17ddf0f51bd07330b1 (hostapd), and in the case of 
the ath12k (and also ath11k), the driver sets 
WLAN_EXT_CAPA10_TWT_RESPONDER_SUPPORT in ext_capa_mask. I'm unsure on 
how to fix this: should hostapd be change so the kernel values can be 
overwritten by the config, or are the kernel values an invariant that 
shall not be overwritten and therefore ath12k should be modified 
so WLAN_EXT_CAPA10_TWT_RESPONDER_SUPPORT is only set in the user space 
or elsewhere in the driver dynamically. I'm taking the example with TWT 
Responder and ath12k, but I believe other drivers are concerned (e.g. 
TWT Requester Support and iwlwifi).

Thanks in advance,
Pablo MG