Re: Configuring WiFi6 in hostapd

["Coelho, Luciano" <luciano.coelho@intel.com>]

On Wed, 2020-09-30 at 21:59 +0200, Sugandh Huthanahally Mohan wrote:
> On Wed, 2020-09-23 at 11:16 +0300, Luciano Coelho wrote:
> > On Thu, 2020-09-17 at 03:01 +0530, Krishna Chaitanya wrote:
> > > > On Sat, Sep 12, 2020 at 12:56 AM Krishna Chaitanya
> > > > <chaitanya.mgit at gmail.com> wrote:
> > > > >On Fri, Sep 11, 2020 at 10:41 PM Johannes Berg
> > > > > <johannes at sipsolutions.net> wrote:
> > > > > >On Fri, 2020-09-11 at 20:37 +0530, Krishna Chaitanya wrote:
> > > > > >
> > > > > > > > [  228.315290] iwlwifi 0000:03:00.0: 0x00002078 | ADVANCED_SYSASSERT
> > > > > > > > [  228.315294] iwlwifi 0000:03:00.0: 0x00A0A200 | trm_hw_status0
> > > > > > > > [  228.315297] iwlwifi 0000:03:00.0: 0x00000000 | trm_hw_status1
> > > > > > > > [  228.315300] iwlwifi 0000:03:00.0: 0x004F8E3C | branchlink2
> > > > > > > > [  228.315303] iwlwifi 0000:03:00.0: 0x004E4FF4 | interruptlink1
> > > > > > > > [  228.315307] iwlwifi 0000:03:00.0: 0x004E4FF4 | interruptlink2
> > > > > > > > [  228.315310] iwlwifi 0000:03:00.0: 0x07000101 | data1
> > > > > > > > [  228.315313] iwlwifi 0000:03:00.0: 0x48308403 | data2
> > > > > > > > [  228.315316] iwlwifi 0000:03:00.0: 0x00000005 | data3
> > > > > >
> > > > > > This means that we got an invalid TX rate, notably an HE rate was
> > > > > > requested/configured on a MAC configuration that didn't have HE.
> > > > > >
> > > > > > I think I saw some patches in this area (configuring the MAC to be HE)
> > > > > > fly by internally recently, but not sure... Luca probably knows.
> > > > > Ah okay. This was reported on 5.4 kernel, do you think is it worth
> > > > > trying on latest iwlwifi-next tree? Or as you are referring to the internal tree
> > > > > the issue is present in the latest as well?
> > > > Hi Luca,
> > > >
> > > > Can you please take a look? Any help is appreciated.
> > >
> > > Hi,
> > >
> > > There have been some new patches in this area, but after a quick look I
> > > didn't find anything specific that jumps out.  I'll take a closer look
> > > and let you know if I find anything.
> 
> > In the meantime, you could try our public backport-iwlwifi tree, where
> > most of the internal tree is published:
> >
> > https://git.kernel.org/pub/scm/linux/kernel/git/iwlwifi/backport-iwlwifi.git/
> >
> > This is an out-of-tree driver, based on the linux-backports project.
> > You could try the core56 branch, for instance, or even master and
> > check if the problem is still there.  If not, we can try to look for
> > the patch that fixes it and push it to stable.
> 
> > --
> > Cheers,
> > Luca.
> 
> Hello Luca,
> 
> I used public backport iwlwifi tree with core56 branch as you suggested.
> I am still observing the crash which I reported earlier.
> 
> Also I upgraded my linux kernel to 5.8 and tried , but still observing
> the same crash.
> I am attaching the dmesg.
> 
> Also when I run hostapd_cli (see below for output )on my AP, I could
> see HE flag.
> 
> >all_sta
> 
> 8c:c6:81:69:86:65
> flags=[AUTH][SHORT_PREAMBLE][WMM][HT][HE]
> aid=1
> capability=0x431
> listen_interval=10
> supported_rates=02 04 0b 16 0c 12 18 24 30 48 60 6c
> timeout_next=NULLFUNC POLL
> dot11RSNAStatsSTAAddress=8c:c6:81:69:86:65
> dot11RSNAStatsVersion=1
> dot11RSNAStatsSelectedPairwiseCipher=00-0f-ac-4
> dot11RSNAStatsTKIPLocalMICFailures=0
> dot11RSNAStatsTKIPRemoteMICFailures=0
> wpa=2
> AKMSuiteSelector=00-0f-ac-2
> hostapdWPAPTKState=0
> hostapdWPAPTKGroupState=0
> supp_op_classes=51515354737475767778797a7b7c7d7e7f
> ht_caps_info=0x19e7
> ext_capab=04004000010000400020
> 

Hi Sugandh,

I'm CCing Guy here.  He can help you get some dedicated support on this
issue.

--
Cheers,
Luca.