2010/12/2 Nick Kossifidis <mickflemm@xxxxxxxxx>:
> 2010/12/2 Sedat Dilek <sedat.dilek@xxxxxxxxxxxxxx>:
>> On Wed, Dec 1, 2010 at 11:21 AM, Bruno Randolf <br1@xxxxxxxxxxx> wrote:
>>> On Wed December 1 2010 19:09:03 Sedat Dilek wrote:
>>>> Hi,
>>>>
>>>> I have built today a linux-next (next-20101201) kernel which includes
>>>> wireless-next-2.6 up to master-2010-11-30.
>> [...]
>>>> Unfortunately, my wlan network connection is totally unstable.
>> [...]
>>> 1.) For identification of the chipset, please:
>>> dmesg |grep "ath5.*chip"
>>>
>>> 2.) Is there a problem when you don't use encryption?
>>>
>>> 3.) git bisect might help track it down.
>>>
>>> bruno
>>
>> OK, I did not a "classic" git-bisect, I created from linux-next
>> (next-20101202) GIT tree a revert-ath5k patchset (30 in total).
>>
>> [1] VERY GOOD: Revertiing all 30 patches
>>
>> ...leads to a stable system.
>>
>> [2] REDUCED DISCONNECTIONS DROPS: Reverting 0001..0008
>>
>> This stabilizes the system, but... listening to a radio
>> broadcast-stream with VLC is a pain in the ass... permanent audio
>> dropouts. I had only 2 disconnections in the first 10mins when system
>> was up (normally I can see disconnects after loggin into my KDE
>> desktop).
>>
>> [3] GOOD AUDIO STREAMING: Reverting 0001..0014
>>
>> This is just fine, system like I am used to.
>>
>> [4] CONCLUSION
>>
>> So I played a bit with my revert-patchset.
>>
>> Reverting 0001..0008 + a refreshed v2 of
>> 0014-Revert-ath5k-Use-turbo-flag-on-DCU.patch (patch attached) is
>> doing the job here.
>>
>> Having a closer look into 0008 (parts of
>> drivers/net/wireless/ath/ath5k/reset.c):
>>
>> $ grep AR5212 patches/revert-wireless-patches/0008-Revert-ath5k-Support-synth-only-channel-change-for-A.patch
>> - Â Â Â if (ah->ah_version == AR5K_AR5212)
>> + Â Â Â Â Â Â Â Â Â Â Â Â* On AR5212 TSF is almost preserved across a
>> - Â Â Â Â Â Â Â Â* On AR5212 TSF is almost preserved across a
>> + Â Â Â Â Â Â Â if (ah->ah_version == AR5K_AR5212) {
>> - Â Â Â if (ah->ah_version == AR5K_AR5212 &&
>>
>> As I mentionned I have a AR5212 wlan device!
>> What to do with that parts?
>> Any idea?
>>
>> Kind Regards,
>> - Sedat -
>>
>> P.S.: I have added a list containing all commit-ids (chronological)
>> and a script how I reverted (documenting for myself).
>>
>> $ ls patches/revert-wireless-patches/00*.patch
>> patches/revert-wireless-patches/0001-Revert-ath5k-Set-turbo-bit-on-rf-bank-2.patch
>> patches/revert-wireless-patches/0002-Revert-ath5k-Clean-up-turbo-mode-initvals-rfregs.patch
>> patches/revert-wireless-patches/0003-Revert-ath5k-Cleanup-turbo-channel-flags.patch
>> patches/revert-wireless-patches/0004-Revert-ath5k-Use-correct-clock-when-setting-ofdm-tim.patch
>> patches/revert-wireless-patches/0005-Revert-ath5k-Skip-tx-power-setting-on-AR5210-for-now.patch
>> patches/revert-wireless-patches/0006-Revert-ath5k-Tweak-phy-activate-to-rx-start-delay-ba.patch
>> patches/revert-wireless-patches/0007-Revert-ath5k-No-need-to-save-restore-staid-flags-on-.patch
>> patches/revert-wireless-patches/0008-Revert-ath5k-Support-synth-only-channel-change-for-A.patch
>> patches/revert-wireless-patches/0009-Revert-ath5k-Skip-powertable-setting-when-we-are-on-.patch
>> patches/revert-wireless-patches/0010-Revert-ath5k-Update-PLL-programming-for-turbo-half-q.patch
>> patches/revert-wireless-patches/0011-Revert-ath5k-Update-spur-mitigation-filter-for-turbo.patch
>> patches/revert-wireless-patches/0012-Revert-ath5k-Tweak-power-detector-delays-on-RF5111-R.patch
>> patches/revert-wireless-patches/0013-Revert-ath5k-Always-set-IFS-intervals-on-reset.patch
>> patches/revert-wireless-patches/0014-Revert-ath5k-Use-turbo-flag-on-DCU.patch
>> patches/revert-wireless-patches/0015-Revert-ath5k-Set-all-IFS-intervals-not-just-slot-tim.patch
>> patches/revert-wireless-patches/0016-Revert-ath5k-Extend-rate_duration.patch
>> patches/revert-wireless-patches/0017-Revert-ath5k-Extend-get_default_sifs-slot_time.patch
>> patches/revert-wireless-patches/0018-Revert-ath5k-Move-tx-retries-setting-outside-reset_t.patch
>> patches/revert-wireless-patches/0019-Revert-ath5k-Increase-PHY-settling-parameters-for-tu.patch
>> patches/revert-wireless-patches/0020-Revert-ath5k-Small-cleanup-on-tweak_initvals.patch
>> patches/revert-wireless-patches/0021-Revert-ath5k-Put-core-clock-initialization-on-a-new-.patch
>> patches/revert-wireless-patches/0022-Revert-ath5k-Add-new-field-on-ath5k_hw-to-track-band.patch
>> patches/revert-wireless-patches/0023-Revert-ath5k-Use-new-function-to-stop-beacon-queue.patch
>> patches/revert-wireless-patches/0024-Revert-ath5k-Check-RXE-when-setting-RXDP.patch
>> patches/revert-wireless-patches/0025-Revert-ath5k-Use-DCU-early-termination-correctly.patch
>> patches/revert-wireless-patches/0026-Revert-ath5k-Debug-DMA-timeouts.patch
>> patches/revert-wireless-patches/0027-Revert-ath5k-Use-new-dma_stop-function-on-base.c.patch
>> patches/revert-wireless-patches/0028-Revert-ath5k-Stop-PCU-on-reset.patch
>> patches/revert-wireless-patches/0029-Revert-ath5k-Add-new-function-to-stop-rx-tx-DMA.patch
>> patches/revert-wireless-patches/0030-Revert-ath5k-Reset-cleanup-and-generic-cleanup.patch
>>
>
> OK this doesn't make any sense, based on your logs you have an
> AR5212+RF5111+RF2111 combination, synth-only channel change (0008) is
> only executed on AR2413 and AR5413 so you don't even run that code,
> setting turbo flag on DCU (0014) is also unrelated since we never
> enable turbo mode and if we did you wouldn't be able to receive
> anything non-turbo.
>
> I am going to test 2 cards like yours a CM6 and an older one from
> Atheros and come back to you ASAP...
>
I just reproduced it on a CM6 and a CM9 (AR5212 + RF5112), problem
occurs when card is idle (no traffic) that's why my automated test
didn't catch it I can still run iperf after connecting and leave it
running without problems, when traffic stops it soon gets
disconnected. I suspect it's something related to IFS timings/ACK
timeout (0013 on your reverted series), maybe Jonathan Guerin was
correct about ACK timeout...
I'll try something and come back to you with code ;-)
Thanks for reporting !
--
GPG ID: 0xD21DB2DB
As you read this post global entropy rises. Have Fun ;-)
Nick
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