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Subject: Re: Configuring WiFi6 in hostapd
To:     "Coelho, Luciano" <luciano.coelho@intel.com>,
        "johannes@sipsolutions.net" <johannes@sipsolutions.net>,
        "chaitanya.mgit@gmail.com" <chaitanya.mgit@gmail.com>
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        "Grumbach, Emmanuel" <emmanuel.grumbach@intel.com>,
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        "Hostap@lists.infradead.org" <Hostap@lists.infradead.org>
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From:   Ben Greear <greearb@candelatech.com>
Organization: Candela Technologies
Message-ID: <0ef00fa9-d94a-8049-c711-6a061dabd4aa@candelatech.com>
Date:   Wed, 23 Sep 2020 10:40:34 -0700
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On 9/23/20 1:36 AM, Coelho, Luciano 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@gmail.com> wrote:
>>>> On Fri, Sep 11, 2020 at 10:41 PM Johannes Berg
>>>> <johannes@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.

I'm curious if anyone is interested in helping to maintain a non-backports version of this,
something like how I did the ath10k-ct driver.  I'd like to use this driver, but
don't want to use the rest of the backports funk.

Thanks,
Ben

> 
> --
> Cheers,
> Luca.
> 


-- 
Ben Greear <greearb@candelatech.com>
Candela Technologies Inc  http://www.candelatech.com