[PATCH v2 13/24] mac80211: determine chandef from HE 6 GHz operation

[Wen Gong]

On 2020-09-11 18:06, Johannes Berg wrote:
> On Fri, 2020-09-11 at 09:29 +0000, Wen Gong wrote:
>> On 2020-05-29 03:34, Johannes Berg wrote:
>> > From: Johannes Berg <johannes.berg at intel.com>
>> >
>> > Support connecting to HE 6 GHz APs and mesh networks on 6 GHz,
>> > where the HT/VHT information is missing but instead the HE 6 GHz
>> > band capability is present, and the 6 GHz Operation information
>> > field is used to encode the channel configuration instead of the
>> > HT/VHT operation elements.
>> >
>> > Also add some other bits needed to connect to 6 GHz networks.
>> >
>> > Link:
>> > https://lore.kernel.org/r/1589399105-25472-10-git-send-email-rmanohar@codeaurora.org
>> > Co-developed-by: Rajkumar Manoharan <rmanohar at codeaurora.org>
>> > Signed-off-by: Rajkumar Manoharan <rmanohar at codeaurora.org>
>> > Signed-off-by: Johannes Berg <johannes.berg at intel.com>
>> > ---
>> >  net/mac80211/ieee80211_i.h |   3 ++
>> >  net/mac80211/mesh.c        |   1 +
>> >  net/mac80211/mlme.c        |  69 +++++++++++++++++-------
>> >  net/mac80211/util.c        | 106 +++++++++++++++++++++++++++++++++++++
>> >  4 files changed, 160 insertions(+), 19 deletions(-)
>> >
>> [...]
>> > @@ -4838,21 +4860,23 @@ static int ieee80211_prep_channel(struct
>> > ieee80211_sub_if_data *sdata,
>> >  			  IEEE80211_STA_DISABLE_160MHZ);
>> >
>> >  	/* disable HT/VHT/HE if we don't support them */
>> > -	if (!sband->ht_cap.ht_supported) {
>> > +	if (!sband->ht_cap.ht_supported && !is_6ghz) {
>> >  		ifmgd->flags |= IEEE80211_STA_DISABLE_HT;
>> >  		ifmgd->flags |= IEEE80211_STA_DISABLE_VHT;
>> >  		ifmgd->flags |= IEEE80211_STA_DISABLE_HE;
>> >  	}
>> >
>> > -	if (!sband->vht_cap.vht_supported)
>> > +	if (!sband->vht_cap.vht_supported && !is_6ghz) {
>> >  		ifmgd->flags |= IEEE80211_STA_DISABLE_VHT;
>> > +		ifmgd->flags |= IEEE80211_STA_DISABLE_HE;
>> > +	}
>> when connec to NL80211_BAND_2GHZ, it does not support vht, then it
>> failed for HE and connected with HT mode.
>> I tesed with below change, it fix the issue, it connected with HE mode
>> for NL80211_BAND_2GHZ with an HE mode 11AX AP.
> 
> Hmm. Yeah, that seems reasonable. I wonder why/how we never saw this,
> hm.
> 
> Can you send a real patch?
> 
yes, patch sent:
https://lore.kernel.org/linux-wireless/010101747cb617f2-593c5410-1648-4a42-97a0-f3646a5a6dd1-000000@us-west-2.amazonses.com/
> johannes