Re: Connection issues with BW Tracking in mac80211

[Krishna Chaitanya <chaitanya.mgit@gmail.com>]

On Fri, Feb 20, 2015 at 2:58 AM, Krishna Chaitanya
<chaitanya.mgit@gmail.com> wrote:
> On Fri, Feb 20, 2015 at 1:00 AM, Krishna Chaitanya
> <chaitanya.mgit@gmail.com> wrote:
>> Hi Johannes,
>>
>> The BW tracking feature in mac80211 is causing connection problems and
>> operating mode/bw problems when switching b/w modes and bw's in AP.
>>
>> For Eg. Initially if AP is operating in VHT-80MHz, and then we changed
>> in to HT-40MHz, mac80211 cannot handle it because the VHT capability
>> is mismatched b/w stored info (ifmgd->flags).
>>
>> I have tried your DISABLE_BW_TRACK patch, that helps making the
>> connection but it doesn't update the chipset causing issues.
>>
>> Ideally we should be able to handle all the config changes right?
>
> Before that i have a basic question? Should we reset our tracking after
> the connection is lost, in my case above the connection was lost (Config
> change in A triggers a reboot), still mac80211 is tracking the BW changes?

Any ideas johannes? Currenlty we kind-of disabled BW tracking as a work around
for this issue.

mlme.c: Removed the capability checks.

if (!cfg80211_chandef_valid(&chandef)) {
sdata_info(sdata,
"AP %pM chandef invalid - disconnect\n",
ifmgd->bssid);
return -EINVAL;
}