[PATCH 5/5] ath10k: reduce invalid ht params rate message noise

[Jeff Johnson]

(just a resend with Wen's current e-mail address, no further comments)
On 9/20/2023 11:27 AM, James Prestwood wrote:
> On 2/26/21 10:01 AM, Shuah Khan wrote:
>> On 2/11/21 4:24 AM, Kalle Valo wrote:
>>> Shuah Khan <skhan at linuxfoundation.org> writes:
>>>
>>>> On 2/10/21 1:28 AM, Kalle Valo wrote:
>>>>> Wen Gong <wgong at codeaurora.org> writes:
>>>>>
>>>>>> On 2021-02-10 08:42, Shuah Khan wrote:
>>>>>>> ath10k_mac_get_rate_flags_ht() floods dmesg with the following
>>>>>>> messages,
>>>>>>> when it fails to find a match for mcs=7 and rate=1440.
>>>>>>>
>>>>>>> supported_ht_mcs_rate_nss2:
>>>>>>> {7,  {1300, 2700, 1444, 3000} }
>>>>>>>
>>>>>>> ath10k_pci 0000:02:00.0: invalid ht params rate 1440 100kbps nss 2
>>>>>>> mcs 7
>>>>>>>
>>>>>>> dev_warn_ratelimited() isn't helping the noise. Use dev_warn_once()
>>>>>>> instead.
>>>>>>>
>>>>>>> Signed-off-by: Shuah Khan <skhan at linuxfoundation.org>
>>>>>>> ---
>>>>>>>    drivers/net/wireless/ath/ath10k/mac.c | 5 +++--
>>>>>>>    1 file changed, 3 insertions(+), 2 deletions(-)
>>>>>>>
>>>>>>> diff --git a/drivers/net/wireless/ath/ath10k/mac.c
>>>>>>> b/drivers/net/wireless/ath/ath10k/mac.c
>>>>>>> index 3545ce7dce0a..276321f0cfdd 100644
>>>>>>> --- a/drivers/net/wireless/ath/ath10k/mac.c
>>>>>>> +++ b/drivers/net/wireless/ath/ath10k/mac.c
>>>>>>> @@ -8970,8 +8970,9 @@ static void 
>>>>>>> ath10k_mac_get_rate_flags_ht(struct
>>>>>>> ath10k *ar, u32 rate, u8 nss, u8
>>>>>>>            *bw |= RATE_INFO_BW_40;
>>>>>>>            *flags |= RATE_INFO_FLAGS_SHORT_GI;
>>>>>>>        } else {
>>>>>>> -        ath10k_warn(ar, "invalid ht params rate %d 100kbps nss 
>>>>>>> %d mcs %d",
>>>>>>> -                rate, nss, mcs);
>>>>>>> +        dev_warn_once(ar->dev,
>>>>>>> +                  "invalid ht params rate %d 100kbps nss %d mcs 
>>>>>>> %d",
>>>>>>> +                  rate, nss, mcs);
>>>>>>>        }
>>>>>>>    }
>>>>>>
>>>>>> The {7,  {1300, 2700, 1444, 3000} } is a correct value.
>>>>>> The 1440 is report from firmware, its a wrong value, it has fixed in
>>>>>> firmware.
>>>>>
>>>>> In what version?
>>>>>
>>>>
>>>> Here is the info:
>>>>
>>>> ath10k_pci 0000:02:00.0: qca6174 hw3.2 target 0x05030000 chip_id
>>>> 0x00340aff sub 17aa:0827
>>>>
>>>> ath10k_pci 0000:02:00.0: firmware ver WLAN.RM.4.4.1-00140-QCARMSWPZ-1
>>>> api 6 features wowlan,ignore-otp,mfp crc32 29eb8ca1
>>>>
>>>> ath10k_pci 0000:02:00.0: board_file api 2 bmi_id N/A crc32 4ac0889b
>>>>
>>>> ath10k_pci 0000:02:00.0: htt-ver 3.60 wmi-op 4 htt-op 3 cal otp
>>>> max-sta 32 raw 0 hwcrypto 1
>>>>
>>>>>> If change it to dev_warn_once, then it will have no chance to find 
>>>>>> the
>>>>>> other wrong values which report by firmware, and it indicate
>>>>>> a wrong value to mac80211/cfg80211 and lead "iw wlan0 station dump"
>>>>>> get a wrong bitrate.
>>>>>
>>>>
>>>> Agreed.
>>>>
>>>>> I agree, we should keep this warning. If the firmware still keeps
>>>>> sending invalid rates we should add a specific check to ignore the 
>>>>> known
>>>>> invalid values, but not all of them.
>>>>>
>>>>
>>>> Would it be helpful to adjust the default rate limits and set the to
>>>> a higher value instead. It might be difficult to account all possible
>>>> invalid values?
>>>>
>>>> Something like, ath10k_warn_ratelimited() to adjust the
>>>>
>>>> DEFAULT_RATELIMIT_INTERVAL and DEFAULT_RATELIMIT_BURST using
>>>> DEFINE_RATELIMIT_STATE
>>>>
>>>> Let me know if you like this idea. I can send a patch in to do this.
>>>> I will hang on to this firmware version for a little but longer, so
>>>> we have a test case. :)
>>>
>>> I would rather first try to fix the root cause, which is the firmware
>>> sending invalid rates. Wen, you mentioned there's a fix in firmware. Do
>>> you know which firmware version (and branch) has the fix?
>>>
>>
>> Picking this back up. Wen, which firmware version has this fix? I can
>> test this on my system and get rid of the noisy messages. :)
>>
>> thanks,
>> -- Shuah
> 
> I know its been years, but reading through this Wen mentioned there is a 
> fix in the firmware? I haven't tried all of the firmware binaries in 
> Kalle's tree but the most recent definitely still spam the logs with 
> this message. Is there a specific version I can use to get rid of these?
> 
> One thing to note is the older "firmware-4.bin" did not have this 
> problem, but was met with worse problems like driver/firmware crashes.