Re: ath5k regression associating with APs in 2.6.38

Nick Kossifidis
2011-05-05T14:30:46Z

2011/5/5 Seth Forshee <seth.forshee@canonical.com>:
> On Wed, May 04, 2011 at 11:09:03PM +0300, Nick Kossifidis wrote:
>> 2011/5/4 Seth Forshee <seth.forshee@canonical.com>:
>> > On Wed, May 04, 2011 at 01:27:17PM -0400, John W. Linville wrote:
>> >> On Wed, May 04, 2011 at 10:38:19AM -0500, Seth Forshee wrote:
>> >> > I've been investigating some reports of a regression in associating with
>> >> > APs with AR2413 in 2.6.38. Association repeatedly fails with some
>> >> > "direct probe to x timed out" messages (see syslog excerpt below),
>> >> > although it will generally associate eventually, after many tries.
>> >> >
>> >> > Bisection identifies 8aec7af (ath5k: Support synth-only channel change
>> >> > for AR2413/AR5413) as offending commit. Prior to this commit there are
>> >> > no direct probe messages at all in the logs. I've also found that
>> >> > forcing fast to false at the top of ath5k_hw_reset() fixes the issue.
>> >> > I'm not sure what the connection is between this commit and the
>> >> > timeouts. Any suggestions?
>> >>
>> >> Have you tried reverting that commit on top of 2.6.38?  Can you
>> >> recreate the issue with 2.6.39-rc6 (or later)?
>> >
>> > I started to revert that commit, but it wasn't straight-forward due to
>> > later changes. Forcing fast to false in ath5k_hw_reset() acts as a
>> > functional revert of sorts since that should force it back to a full
>> > reset for all channel changes, and it's much simpler than working out
>> > the right way to revert the commit. I think the results suggest strongly
>> > that a revert is likely to fix the problem. I can finish the work to
>> > revert if you'd still like to see the results.
>> >
>> > Testing a previous .39-rc kernel still exhibited the failure. I don't
>> > recall which one it was and apparently forgot to make note of it. I'll
>> > request testing against rc6.
>> >
>> > Thanks,
>> > Seth
>> >
>>
>> Do you get scan results ?
>> Can you enable ATH5K_DEBUG_RESET and see what you get ?
>
> 2.6.39-rc6 still fails. A more comprehensive log with ATH5K_DEBUG_RESET
> enabled is below.
>
> Scanning looks to be failing according to this log. I was thinking that
> I saw successfull scans in some of the previous logs, but I'll have to
> go back and check to be sure.
>
> Thanks,
> Seth
>
>
> kernel: [   23.421242] ath5k 0000:06:02.0: PCI INT A -> GSI 22 (level, low) -> IRQ 22
> kernel: [   23.421312] ath5k 0000:06:02.0: registered as 'phy0'
> kernel: [   24.132959] ath: EEPROM regdomain: 0x63
> kernel: [   24.132962] ath: EEPROM indicates we should expect a direct regpair map
> kernel: [   24.132967] ath: Country alpha2 being used: 00
> kernel: [   24.132969] ath: Regpair used: 0x63
> kernel: [   24.136125] cfg80211: Updating information on frequency 2412 MHz for a 20 MHz width channel with regulatory rule:
> kernel: [   24.136131] cfg80211: 2402000 KHz - 2472000 KHz @  KHz), (N/A mBi, 2000 mBm)
> kernel: [   24.136134] cfg80211: Updating information on frequency 2417 MHz for a 20 MHz width channel with regulatory rule:
> kernel: [   24.136137] cfg80211: 2402000 KHz - 2472000 KHz @  KHz), (N/A mBi, 2000 mBm)
> kernel: [   24.136140] cfg80211: Updating information on frequency 2422 MHz for a 20 MHz width channel with regulatory rule:
> kernel: [   24.136143] cfg80211: 2402000 KHz - 2472000 KHz @  KHz), (N/A mBi, 2000 mBm)
> kernel: [   24.136146] cfg80211: Updating information on frequency 2427 MHz for a 20 MHz width channel with regulatory rule:
> kernel: [   24.136149] cfg80211: 2402000 KHz - 2472000 KHz @  KHz), (N/A mBi, 2000 mBm)
> kernel: [   24.136151] cfg80211: Updating information on frequency 2432 MHz for a 20 MHz width channel with regulatory rule:
> kernel: [   24.136155] cfg80211: 2402000 KHz - 2472000 KHz @  KHz), (N/A mBi, 2000 mBm)
> kernel: [   24.136157] cfg80211: Updating information on frequency 2437 MHz for a 20 MHz width channel with regulatory rule:
> kernel: [   24.136160] cfg80211: 2402000 KHz - 2472000 KHz @  KHz), (N/A mBi, 2000 mBm)
> kernel: [   24.136163] cfg80211: Updating information on frequency 2442 MHz for a 20 MHz width channel with regulatory rule:
> kernel: [   24.136166] cfg80211: 2402000 KHz - 2472000 KHz @  KHz), (N/A mBi, 2000 mBm)
> kernel: [   24.136168] cfg80211: Updating information on frequency 2447 MHz for a 20 MHz width channel with regulatory rule:
> kernel: [   24.136172] cfg80211: 2402000 KHz - 2472000 KHz @  KHz), (N/A mBi, 2000 mBm)
> kernel: [   24.136174] cfg80211: Updating information on frequency 2452 MHz for a 20 MHz width channel with regulatory rule:
> kernel: [   24.136177] cfg80211: 2402000 KHz - 2472000 KHz @  KHz), (N/A mBi, 2000 mBm)
> kernel: [   24.136180] cfg80211: Updating information on frequency 2457 MHz for a 20 MHz width channel with regulatory rule:
> kernel: [   24.136183] cfg80211: 2402000 KHz - 2472000 KHz @  KHz), (N/A mBi, 2000 mBm)
> kernel: [   24.136186] cfg80211: Updating information on frequency 2462 MHz for a 20 MHz width channel with regulatory rule:
> kernel: [   24.136189] cfg80211: 2402000 KHz - 2472000 KHz @  KHz), (N/A mBi, 2000 mBm)
> kernel: [   24.136191] cfg80211: Updating information on frequency 2467 MHz for a 20 MHz width channel with regulatory rule:
> kernel: [   24.136195] cfg80211: 2457000 KHz - 2482000 KHz @  KHz), (N/A mBi, 2000 mBm)
> kernel: [   24.136197] cfg80211: Updating information on frequency 2472 MHz for a 20 MHz width channel with regulatory rule:
> kernel: [   24.136200] cfg80211: 2457000 KHz - 2482000 KHz @  KHz), (N/A mBi, 2000 mBm)
> kernel: [   24.136203] cfg80211: Disabling freq 2484 MHz as custom regd has no rule that fits a 20 MHz wide channel
> kernel: [   24.136404] cfg80211: Ignoring regulatory request Set by core since the driver uses its own custom regulatory domain
> kernel: [   24.393924] ieee80211 phy0: Selected rate control algorithm 'minstrel_ht'
> kernel: [   24.394588] ath5k phy0: Atheros AR2413 chip found (MAC: 0x78, PHY: 0x45)
> ...
> NetworkManager[725]: <info> (wlan0): driver supports SSID scans (scan_capa 0x01).
> NetworkManager[725]: <info> (wlan0): new 802.11 WiFi device (driver: 'ath5k' ifindex: 3)
> NetworkManager[725]: <info> (wlan0): exported as /org/freedesktop/NetworkManager/Devices/1
> NetworkManager[725]: <info> (wlan0): now managed
> NetworkManager[725]: <info> (wlan0): device state change: 1 -> 2 (reason 2)
> NetworkManager[725]: <info> (wlan0): bringing up device.
> NetworkManager[725]: <info> (wlan0): preparing device.
> NetworkManager[725]: <info> (wlan0): deactivating device (reason: 2).
> NetworkManager[725]: supplicant_interface_acquire: assertion `mgr_state == NM_SUPPLICANT_MANAGER_STATE_IDLE' failed
> kernel: [   25.149294] ADDRCONF(NETDEV_UP): wlan0: link is not ready
> ...
> NetworkManager[725]: <info> Trying to start the supplicant...
> ...
> NetworkManager[725]: <info> (wlan0): supplicant manager state:  down -> idle
> NetworkManager[725]: <info> (wlan0): device state change: 2 -> 3 (reason 0)
> NetworkManager[725]: <info> (wlan0): supplicant interface state:  starting -> ready
> ...
> NetworkManager[725]: <info> (wlan0): device state change: 3 -> 2 (reason 0)
> NetworkManager[725]: <info> (wlan0): deactivating device (reason: 0).
> NetworkManager[725]: <info> (wlan0): taking down device.
> NetworkManager[725]: <info> (wlan0): bringing up device.
> kernel: [  104.430292] ath5k phy0: (ath5k_init_hw:2522): mode 2
> kernel: [  104.430297] ath5k phy0: (ath5k_stop_locked:2481): invalid 0
> kernel: [  104.431000] ath5k phy0: (ath5k_reset:2648): resetting
> kernel: [  104.434475] ath5k phy0: (ath5k_rx_start:1099): cachelsz 32 rx_bufsize 2368
> kernel: [  104.434683] ath5k phy0: (ath5k_rfkill_disable:42): rfkill disable (gpio:0 polarity:0)
> kernel: [  104.435759] ath5k phy0: (ath5k_chan_set:434): channel set, resetting (2412 -> 2412 MHz)
> kernel: [  104.435762] ath5k phy0: (ath5k_reset:2648): resetting
> kernel: [  104.436845] ath5k phy0: (ath5k_rx_start:1099): cachelsz 32 rx_bufsize 2368
> kernel: [  104.437191] ath5k phy0: (ath5k_conf_tx:602): Configure tx [queue 0],  aifs: 2, cw_min: 7, cw_max: 15, txop: 102
> kernel: [  104.437212] ath5k phy0: (ath5k_conf_tx:602): Configure tx [queue 1],  aifs: 2, cw_min: 15, cw_max: 31, txop: 188
> kernel: [  104.438337] ADDRCONF(NETDEV_UP): wlan0: link is not ready
> NetworkManager[725]: <info> (wlan0): supplicant interface state:  starting -> ready
> NetworkManager[725]: <info> (wlan0): device state change: 2 -> 3 (reason 42)
> wpa_supplicant[745]: Failed to initiate AP scan.
> kernel: [  125.188087] net_ratelimit: 41 callbacks suppressed
> kernel: [  125.188100] ath5k phy0: (ath5k_chan_set:434): channel set, resetting (2412 -> 2417 MHz)
> kernel: [  125.188109] ath5k phy0: (ath5k_reset:2648): resetting
> kernel: [  125.291007] ath5k phy0: (ath5k_rx_start:1099): cachelsz 32 rx_bufsize 2368
> kernel: [  125.344076] ath5k phy0: (ath5k_chan_set:434): channel set, resetting (2417 -> 2422 MHz)
> kernel: [  125.344090] ath5k phy0: (ath5k_reset:2648): resetting
> kernel: [  125.447014] ath5k phy0: (ath5k_rx_start:1099): cachelsz 32 rx_bufsize 2368
> kernel: [  125.500078] ath5k phy0: (ath5k_chan_set:434): channel set, resetting (2422 -> 2427 MHz)
> kernel: [  125.500091] ath5k phy0: (ath5k_reset:2648): resetting
> kernel: [  125.602999] ath5k phy0: (ath5k_rx_start:1099): cachelsz 32 rx_bufsize 2368
> kernel: [  125.656070] ath5k phy0: (ath5k_chan_set:434): channel set, resetting (2427 -> 2432 MHz)
> kernel: [  155.188052] net_ratelimit: 29 callbacks suppressed
> kernel: [  155.188058] ath5k phy0: (ath5k_chan_set:434): channel set, resetting (2412 -> 2417 MHz)
> kernel: [  155.188061] ath5k phy0: (ath5k_reset:2648): resetting
> kernel: [  155.290844] ath5k phy0: (ath5k_rx_start:1099): cachelsz 32 rx_bufsize 2368
> kernel: [  155.344032] ath5k phy0: (ath5k_chan_set:434): channel set, resetting (2417 -> 2422 MHz)
> kernel: [  155.344038] ath5k phy0: (ath5k_reset:2648): resetting
> kernel: [  155.446810] ath5k phy0: (ath5k_rx_start:1099): cachelsz 32 rx_bufsize 2368
> kernel: [  155.500031] ath5k phy0: (ath5k_chan_set:434): channel set, resetting (2422 -> 2427 MHz)
> kernel: [  155.500036] ath5k phy0: (ath5k_reset:2648): resetting
> kernel: [  155.602811] ath5k phy0: (ath5k_rx_start:1099): cachelsz 32 rx_bufsize 2368
> kernel: [  155.656033] ath5k phy0: (ath5k_chan_set:434): channel set, resetting (2427 -> 2432 MHz)
> kernel: [  195.184088] net_ratelimit: 29 callbacks suppressed
> kernel: [  195.184102] ath5k phy0: (ath5k_chan_set:434): channel set, resetting (2412 -> 2417 MHz)
> kernel: [  195.184110] ath5k phy0: (ath5k_reset:2648): resetting
> kernel: [  195.287022] ath5k phy0: (ath5k_rx_start:1099): cachelsz 32 rx_bufsize 2368
> kernel: [  195.340066] ath5k phy0: (ath5k_chan_set:434): channel set, resetting (2417 -> 2422 MHz)
> kernel: [  195.340079] ath5k phy0: (ath5k_reset:2648): resetting
> kernel: [  195.442967] ath5k phy0: (ath5k_rx_start:1099): cachelsz 32 rx_bufsize 2368
> kernel: [  195.496076] ath5k phy0: (ath5k_chan_set:434): channel set, resetting (2422 -> 2427 MHz)
> kernel: [  195.496088] ath5k phy0: (ath5k_reset:2648): resetting
> kernel: [  195.599009] ath5k phy0: (ath5k_rx_start:1099): cachelsz 32 rx_bufsize 2368
> kernel: [  195.652078] ath5k phy0: (ath5k_chan_set:434): channel set, resetting (2427 -> 2432 MHz)
> kernel: [  245.188077] net_ratelimit: 29 callbacks suppressed
> kernel: [  245.188091] ath5k phy0: (ath5k_chan_set:434): channel set, resetting (2412 -> 2417 MHz)
> kernel: [  245.188100] ath5k phy0: (ath5k_reset:2648): resetting
> kernel: [  245.290997] ath5k phy0: (ath5k_rx_start:1099): cachelsz 32 rx_bufsize 2368
> kernel: [  245.344084] ath5k phy0: (ath5k_chan_set:434): channel set, resetting (2417 -> 2422 MHz)
> kernel: [  245.344092] ath5k phy0: (ath5k_reset:2648): resetting
> kernel: [  245.446882] ath5k phy0: (ath5k_rx_start:1099): cachelsz 32 rx_bufsize 2368
> kernel: [  245.500053] ath5k phy0: (ath5k_chan_set:434): channel set, resetting (2422 -> 2427 MHz)
> kernel: [  245.500058] ath5k phy0: (ath5k_reset:2648): resetting
> kernel: [  245.602808] ath5k phy0: (ath5k_rx_start:1099): cachelsz 32 rx_bufsize 2368
> kernel: [  245.656046] ath5k phy0: (ath5k_chan_set:434): channel set, resetting (2427 -> 2432 MHz)
> kernel: [  305.188050] net_ratelimit: 29 callbacks suppressed
> kernel: [  305.188063] ath5k phy0: (ath5k_chan_set:434): channel set, resetting (2412 -> 2417 MHz)
> kernel: [  305.188071] ath5k phy0: (ath5k_reset:2648): resetting
> kernel: [  305.290945] ath5k phy0: (ath5k_rx_start:1099): cachelsz 32 rx_bufsize 2368
> kernel: [  305.344070] ath5k phy0: (ath5k_chan_set:434): channel set, resetting (2417 -> 2422 MHz)
> kernel: [  305.344082] ath5k phy0: (ath5k_reset:2648): resetting
> kernel: [  305.446943] ath5k phy0: (ath5k_rx_start:1099): cachelsz 32 rx_bufsize 2368
> kernel: [  305.500047] ath5k phy0: (ath5k_chan_set:434): channel set, resetting (2422 -> 2427 MHz)
> kernel: [  305.500058] ath5k phy0: (ath5k_reset:2648): resetting
> kernel: [  305.602967] ath5k phy0: (ath5k_rx_start:1099): cachelsz 32 rx_bufsize 2368
> kernel: [  305.656090] ath5k phy0: (ath5k_chan_set:434): channel set, resetting (2427 -> 2432 MHz)
> NetworkManager[725]: <info> (wlan0): device state change: 3 -> 2 (reason 0)
> NetworkManager[725]: <info> (wlan0): deactivating device (reason: 0).
> NetworkManager[725]: <info> (wlan0): taking down device.
> kernel: [  310.887530] net_ratelimit: 29 callbacks suppressed
> kernel: [  310.887535] ath5k phy0: (ath5k_stop_locked:2481): invalid 0
> kernel: [  310.990264] ath5k phy0: (ath5k_stop_hw:2619): putting device to sleep
> kernel: [  310.990554] ath5k phy0: (ath5k_rfkill_enable:51): rfkill enable (gpio:0 polarity:0)
> NetworkManager[725]: <info> (wlan0): bringing up device.
> kernel: [  315.755891] ath5k phy0: (ath5k_init_hw:2522): mode 2
> kernel: [  315.755903] ath5k phy0: (ath5k_stop_locked:2481): invalid 0
> kernel: [  315.756624] ath5k phy0: (ath5k_reset:2648): resetting
> kernel: [  315.760236] ath5k phy0: (ath5k_rx_start:1099): cachelsz 32 rx_bufsize 2368
> kernel: [  315.760474] ath5k phy0: (ath5k_rfkill_disable:42): rfkill disable (gpio:0 polarity:0)
> kernel: [  315.762566] ath5k phy0: (ath5k_chan_set:434): channel set, resetting (2412 -> 2412 MHz)
> kernel: [  315.762574] ath5k phy0: (ath5k_reset:2648): resetting
> kernel: [  315.764972] ADDRCONF(NETDEV_UP): wlan0: link is not ready
> NetworkManager[725]: <info> (wlan0): supplicant interface state:  starting -> ready
> NetworkManager[725]: <info> (wlan0): device state change: 2 -> 3 (reason 42)
> wpa_supplicant[745]: Failed to initiate AP scan.
> kernel: [  316.036068] net_ratelimit: 8 callbacks suppressed
> kernel: [  316.036080] ath5k phy0: (ath5k_chan_set:434): channel set, resetting (2417 -> 2422 MHz)
> kernel: [  316.036089] ath5k phy0: (ath5k_reset:2648): resetting
> kernel: [  316.140039] ath5k phy0: (ath5k_rx_start:1099): cachelsz 32 rx_bufsize 2368
> kernel: [  316.196067] ath5k phy0: (ath5k_chan_set:434): channel set, resetting (2422 -> 2427 MHz)
> kernel: [  316.196079] ath5k phy0: (ath5k_reset:2648): resetting
> kernel: [  316.298940] ath5k phy0: (ath5k_rx_start:1099): cachelsz 32 rx_bufsize 2368
> kernel: [  316.352063] ath5k phy0: (ath5k_chan_set:434): channel set, resetting (2427 -> 2432 MHz)
> kernel: [  316.352071] ath5k phy0: (ath5k_reset:2648): resetting
> kernel: [  316.455003] ath5k phy0: (ath5k_rx_start:1099): cachelsz 32 rx_bufsize 2368
> kernel: [  316.508080] ath5k phy0: (ath5k_chan_set:434): channel set, resetting (2432 -> 2437 MHz)
> kernel: [  336.188067] net_ratelimit: 26 callbacks suppressed
> kernel: [  336.188080] ath5k phy0: (ath5k_chan_set:434): channel set, resetting (2412 -> 2417 MHz)
> kernel: [  336.188088] ath5k phy0: (ath5k_reset:2648): resetting
> kernel: [  336.290966] ath5k phy0: (ath5k_rx_start:1099): cachelsz 32 rx_bufsize 2368
> kernel: [  336.344059] ath5k phy0: (ath5k_chan_set:434): channel set, resetting (2417 -> 2422 MHz)
> kernel: [  336.344068] ath5k phy0: (ath5k_reset:2648): resetting
> kernel: [  336.446912] ath5k phy0: (ath5k_rx_start:1099): cachelsz 32 rx_bufsize 2368
> kernel: [  336.500068] ath5k phy0: (ath5k_chan_set:434): channel set, resetting (2422 -> 2427 MHz)
> kernel: [  336.500077] ath5k phy0: (ath5k_reset:2648): resetting
> kernel: [  336.602937] ath5k phy0: (ath5k_rx_start:1099): cachelsz 32 rx_bufsize 2368
> kernel: [  336.656058] ath5k phy0: (ath5k_chan_set:434): channel set, resetting (2427 -> 2432 MHz)
> kernel: [  366.188084] net_ratelimit: 29 callbacks suppressed
> kernel: [  366.188097] ath5k phy0: (ath5k_chan_set:434): channel set, resetting (2412 -> 2417 MHz)
> kernel: [  366.188105] ath5k phy0: (ath5k_reset:2648): resetting
> kernel: [  366.290999] ath5k phy0: (ath5k_rx_start:1099): cachelsz 32 rx_bufsize 2368
> kernel: [  366.344099] ath5k phy0: (ath5k_chan_set:434): channel set, resetting (2417 -> 2422 MHz)
> kernel: [  366.344112] ath5k phy0: (ath5k_reset:2648): resetting
> kernel: [  366.447030] ath5k phy0: (ath5k_rx_start:1099): cachelsz 32 rx_bufsize 2368
> kernel: [  366.500094] ath5k phy0: (ath5k_chan_set:434): channel set, resetting (2422 -> 2427 MHz)
> kernel: [  366.500106] ath5k phy0: (ath5k_reset:2648): resetting
> kernel: [  366.603008] ath5k phy0: (ath5k_rx_start:1099): cachelsz 32 rx_bufsize 2368
> kernel: [  366.656103] ath5k phy0: (ath5k_chan_set:434): channel set, resetting (2427 -> 2432 MHz)
>
>

Hmm I don't see any errors from reset/phy code, can you disable
Network Manager/wpa-supplicant and test connection on an open network
using iw ? It 'll give us a better picture...

If iw doesn't return any scan results we are probably hitting a PHY/RF
error specific to your device (not all vendors follow the reference
design). Maybe we should follow a blacklist/whitelist approach for
this feature.

--
GPG ID: 0xD21DB2DB
As you read this post global entropy rises. Have Fun ;-)
Nick