Re: ath: DMA failed to stop in 10 ms AR_CR=0x00000024 AR_DIAG_SW=0x02000020DMADBG_7=0x00008040
From: Justin P. Mattock
Date: Sun Mar 25 2012 - 11:05:25 EST
On 03/20/2012 12:44 AM, Mohammed Shafi wrote:
/home/kernel/linux-next/drivers/net/wireless/ath/ath9k/ath9k.o...done.
(gdb) l *(ath_tx_start+0x284)
0xcad4 is in ath_tx_start (drivers/net/wireless/ath/ath9k/xmit.c:1878).
1873 ieee80211_is_data_qos(hdr->frame_control)) {
1874 tidno = ieee80211_get_qos_ctl(hdr)[0]&
1875 IEEE80211_QOS_CTL_TID_MASK;
1876 tid = ATH_AN_2_TID(txctl->an, tidno);
1877
1878 WARN_ON(tid->ac->txq != txctl->txq);
1879 }
1880
1881 if ((tx_info->flags& IEEE80211_TX_CTL_AMPDU)&& tid) {
1882 /*
(gdb
please check with the attached debug patch if tid is 'NULL'
its my theory that tid is not initialized in ath_tx_node_init just after resume.
during suspend ath9k_sta_remove may be called
ieee80211_suspend -> drv_sta_state ->
drv_sta_remove->ath9k_sta_remove->ath_node_detach->ath_tx_node_cleanup
during resume
ieee80211_resume ->
ieee80211_reconfig->drv_sta_state->ath9k_sta_add->ath_node_attach->ath_tx_node_init
now sta.ht_cap.ht_supported should be true. it will be set to true in
assoc_sucess path and then sta_add is called.
let me see if i had missed something or my analysis itself is wrong.
after a few days of running these patches I did not hit anything, then
on a reboot I hit this. positive side though is I didnt loose internet
connectivity altogether i.g. my music streaming stayed connected but
internet surfing lost connection for a few seconds(30-40) then came back.
this is in dmesg..:
[ 18.801995] ieee80211 phy0: Selected rate control algorithm
'ath9k_rate_control'
[ 18.803477] Registered led device: ath9k-phy0
[ 18.803489] ieee80211 phy0: Atheros AR9285 Rev:2 mem=0xf8fa0000, irq=17
[ 18.863699] input: ETPS/2 Elantech Touchpad as
/devices/platform/i8042/serio1/input/input8
[ 18.905167] HDMI status: Codec=3 Pin=5 Presence_Detect=0 ELD_Valid=0
[ 18.905338] input: HDA Intel HDMI/DP,pcm=3 as
/devices/pci0000:00/0000:00:1b.0/sound/card0/input9
[ 22.178072] init: avahi-daemon main process (794) terminated with
status 2
[ 22.178116] init: avahi-daemon main process ended, respawning
[ 22.515462] init: ufw pre-start process (503) terminated with status 1
[ 22.523987] init: cups pre-start process (802) terminated with status 1
[ 23.122716] init: Failed to spawn smbd main process: unable to
execute: No such file or directory
[ 23.146521] init: failsafe main process (907) killed by TERM signal
[ 25.011529] ieee80211 phy0: device now idle
[ 25.046220] r8169 0000:06:00.0: eth0: bmcr: 1000 bmsr: 7849 gbcr:
0000 gbsr: 0000
[ 25.046223] r8169 0000:06:00.0: eth0: link down
[ 25.686361] ieee80211 phy0: device no longer idle - scanning
[ 27.311270] ieee80211 phy0: device now idle
[ 27.336454] ieee80211 phy0: device no longer idle - scanning
[ 28.206726] wlan0: authenticate with 00:1e:2a:62:6b:1e
[ 28.206800] ieee80211 phy0: Allocated STA 00:1e:2a:62:6b:1e
[ 28.220206] ieee80211 phy0: Inserted STA 00:1e:2a:62:6b:1e
[ 28.220211] wlan0: send auth to 00:1e:2a:62:6b:1e (try 1/3)
[ 28.222300] wlan0: authenticated
[ 28.222317] wlan0: moving STA 00:1e:2a:62:6b:1e to state 2
[ 28.229855] wlan0: associate with 00:1e:2a:62:6b:1e (try 1/3)
[ 28.232472] wlan0: RX AssocResp from 00:1e:2a:62:6b:1e (capab=0x31
status=0 aid=5)
[ 28.232479] wlan0: associated
[ 28.232495] wlan0: moving STA 00:1e:2a:62:6b:1e to state 3
[ 28.245788] wlan0: moving STA 00:1e:2a:62:6b:1e to state 4
[ 31.910960] init: nmbd pre-start process (1192) terminated with
status 127
[ 32.110327] EXT4-fs (sda9): re-mounted. Opts:
errors=remount-ro,commit=600
[ 35.706391] init: plymouth-stop pre-start process (1295) terminated
with status 1
[ 38.315982] EXT4-fs (sda9): re-mounted. Opts: errors=remount-ro,commit=0
[ 48.568651] EXT4-fs (sda9): re-mounted. Opts:
errors=remount-ro,commit=600
[ 941.868195] wlan0: detected beacon loss from AP - sending probe request
[ 942.040883] ath: phy0: Failed to stop TX DMA, queues=0x005!
[ 942.058737] ath: phy0: DMA failed to stop in 10 ms AR_CR=0x00000024
AR_DIAG_SW=0x02000020 DMADBG_7=0x00006040
[ 942.058749] ath: phy0: Could not stop RX, we could be confusing the
DMA engine when we start RX up
[ 942.058757] ------------[ cut here ]------------
[ 942.058778] WARNING: at drivers/net/wireless/ath/ath9k/recv.c:531
ath_stoprecv+0xfa/0x110 [ath9k]()
[ 942.058785] Hardware name: 0914
[ 942.058790] Modules linked in: dm_crypt xt_limit xt_tcpudp
xt_addrtype joydev xt_state snd_hda_codec_hdmi snd_hda_codec_conexant
arc4 ath9k snd_hda_intel mac80211 nf_conntrack_netbios_ns
nf_conntrack_broadcast snd_hda_codec snd_hwdep nf_nat_ftp nf_nat snd_pcm
nf_conntrack_ipv4 nf_defrag_ipv4 snd_seq_midi nf_conntrack_ftp
nf_conntrack snd_rawmidi ath9k_common snd_seq_midi_event snd_seq
snd_timer iptable_filter uvcvideo ath9k_hw ath lp parport cfg80211
snd_seq_device snd ip_tables ideapad_laptop videobuf2_core soundcore
snd_page_alloc x_tables psmouse sparse_keymap serio_raw videodev
videobuf2_vmalloc videobuf2_memops intel_ips i915 drm_kms_helper drm
i2c_algo_bit intel_agp intel_gtt r8169 agpgart video
[ 942.058960] Pid: 65, comm: kworker/u:3 Not tainted
3.3.0-next-20120322-00001-gba6003c #3
[ 942.058967] Call Trace:
[ 942.058987] [<c10492c2>] warn_slowpath_common+0x72/0xa0
[ 942.059003] [<f8b0897a>] ? ath_stoprecv+0xfa/0x110 [ath9k]
[ 942.059019] [<f8b0897a>] ? ath_stoprecv+0xfa/0x110 [ath9k]
[ 942.059030] [<c1049312>] warn_slowpath_null+0x22/0x30
[ 942.059045] [<f8b0897a>] ath_stoprecv+0xfa/0x110 [ath9k]
[ 942.059066] [<f8b044cd>] ath_prepare_reset+0x5d/0xd0 [ath9k]
[ 942.059082] [<f8b05adc>] ath_reset_internal+0x6c/0x170 [ath9k]
[ 942.059095] [<c10abcab>] ? trace_hardirqs_on+0xb/0x10
[ 942.059110] [<f8b05c05>] ath_reset+0x25/0xb0 [ath9k]
[ 942.059148] [<c10abc14>] ? trace_hardirqs_on_caller+0xf4/0x180
[ 942.059164] [<f8b07407>] ath_reset_work+0x17/0x20 [ath9k]
[ 942.059176] [<c1068706>] process_one_work+0x166/0x5c0
[ 942.059185] [<c1068692>] ? process_one_work+0xf2/0x5c0
[ 942.059199] [<c12d546b>] ? do_raw_spin_lock+0x3b/0xf0
[ 942.059219] [<f8b073f0>] ? ath_isr+0x270/0x270 [ath9k]
[ 942.059235] [<c1068e74>] worker_thread+0x124/0x2c0
[ 942.059245] [<c1068d50>] ? rescuer_thread+0x1c0/0x1c0
[ 942.059257] [<c106dbed>] kthread+0x7d/0x90
[ 942.059267] [<c106db70>] ? __init_kthread_worker+0x60/0x60
[ 942.059283] [<c15a0082>] kernel_thread_helper+0x6/0x10
[ 942.059286] ---[ end trace 6df3dcfe38b1fdb8 ]---
[ 942.066296] ieee80211 phy0: wlan0: No ack for nullfunc frame to AP
00:1e:2a:62:6b:1e, try 1/2
[ 942.561934] ieee80211 phy0: wlan0: Failed to send nullfunc to AP
00:1e:2a:62:6b:1e after 500ms, disconnecting.
[ 942.566506] wlan0: moving STA 00:1e:2a:62:6b:1e to state 3
[ 942.566514] wlan0: moving STA 00:1e:2a:62:6b:1e to state 2
[ 942.566556] wlan0: moving STA 00:1e:2a:62:6b:1e to state 1
[ 942.569979] ieee80211 phy0: Removed STA 00:1e:2a:62:6b:1e
[ 942.570946] ieee80211 phy0: Destroyed STA 00:1e:2a:62:6b:1e
[ 942.574474] ieee80211 phy0: device now idle
[ 942.574743] cfg80211: All devices are disconnected, going to restore
regulatory settings
[ 942.574757] cfg80211: Restoring regulatory settings
[ 942.574983] cfg80211: Calling CRDA to update world regulatory domain
[ 942.585392] cfg80211: Ignoring regulatory request Set by core since
the driver uses its own custom regulatory domain
[ 942.585519] cfg80211: World regulatory domain updated:
[ 942.585524] cfg80211: (start_freq - end_freq @ bandwidth),
(max_antenna_gain, max_eirp)
[ 942.585530] cfg80211: (2402000 KHz - 2472000 KHz @ 40000 KHz), (300
mBi, 2000 mBm)
[ 942.585536] cfg80211: (2457000 KHz - 2482000 KHz @ 20000 KHz), (300
mBi, 2000 mBm)
[ 942.585541] cfg80211: (2474000 KHz - 2494000 KHz @ 20000 KHz), (300
mBi, 2000 mBm)
[ 942.585546] cfg80211: (5170000 KHz - 5250000 KHz @ 40000 KHz), (300
mBi, 2000 mBm)
[ 942.585552] cfg80211: (5735000 KHz - 5835000 KHz @ 40000 KHz), (300
mBi, 2000 mBm)
[ 942.965150] ieee80211 phy0: device no longer idle - scanning
[ 943.839899] wlan0: authenticate with 00:1e:2a:62:6b:1e
[ 943.839961] ieee80211 phy0: Allocated STA 00:1e:2a:62:6b:1e
[ 943.853169] ieee80211 phy0: Inserted STA 00:1e:2a:62:6b:1e
[ 943.853178] wlan0: send auth to 00:1e:2a:62:6b:1e (try 1/3)
[ 943.856967] wlan0: authenticated
[ 943.856980] wlan0: moving STA 00:1e:2a:62:6b:1e to state 2
[ 943.866660] wlan0: associate with 00:1e:2a:62:6b:1e (try 1/3)
[ 943.869352] wlan0: RX AssocResp from 00:1e:2a:62:6b:1e (capab=0x31
status=0 aid=5)
[ 943.869362] wlan0: associated
[ 943.869385] wlan0: moving STA 00:1e:2a:62:6b:1e to state 3
[ 943.884712] wlan0: moving STA 00:1e:2a:62:6b:1e to state 4
Justin P. Mattock
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