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Date:	Fri, 01 Jul 2011 09:00:16 -0700
From:	"Justin P. Mattock" <justinmattock@...il.com>
To:	Mohammed Shafi <shafi.wireless@...il.com>
CC:	"linux-kernel@...r.kernel.org" <linux-kernel@...r.kernel.org>,
	linux-wireless@...r.kernel.org, ath5k-devel@...ema.h4ckr.net
Subject: Re: WARNING: at kernel/timer.c:1011 del_timer_sync+0xa9/0xc4()

On 07/01/2011 12:06 AM, Mohammed Shafi wrote:
> On Fri, Jul 1, 2011 at 12:09 PM, Justin P. Mattock
> <justinmattock@...il.com>  wrote:
>> On 06/30/2011 11:27 PM, Mohammed Shafi wrote:
>>>
>>> On Fri, Jul 1, 2011 at 11:12 AM, Justin P. Mattock
>>> <justinmattock@...il.com>    wrote:
>>>>
>>>> not sure if somebody has posted this or not(did post last week, but no
>>>> replies on this) I would bisect, but have no time(maybe in the future).
>>>>
>>>> anyways let me know if you need more info.
>>>> dmesg here:
>>>> http://fpaste.org/wLxM/
>>>>
>>>>
>>>> [ 43.108967] SELinux: initialized (dev fusectl, type fusectl), uses
>>>> genfs_contexts
>>>> [ 561.844541] ath: Failed to stop TX DMA!
>>>> [ 1514.074565] ------------[ cut here ]------------
>>>> [ 1514.074584] WARNING: at kernel/timer.c:1011 del_timer_sync+0xa9/0xc4()
>>>> [ 1514.074590] Hardware name: MacBookPro2,2
>>>> [ 1514.074595] Modules linked in: fuse 8021q cpufreq_ondemand garp stp
>>>> acpi_cpufreq llc freq_table mperf ipt_REJECT nf_conntrack_ipv4
>>>> nf_defrag_ipv4 xt_state nf_conntrack iptable_filter ip_tables arc4 radeon
>>>> ath9k mac80211 ttm ath9k_common drm_kms_helper ath9k_hw drm ath cfg80211
>>>> uvcvideo videodev btusb bluetooth sky2 v4l2_compat_ioctl32 appletouch
>>>> iTCO_wdt i2c_i801 joydev i2c_algo_bit iTCO_vendor_support applesmc rfkill
>>>> i2c_core input_polldev apple_bl video microcode [last unloaded:
>>>> scsi_wait_scan]
>>>> [ 1514.074730] Pid: 1550, comm: threaded-ml Not tainted
>>>> 3.0.0-rc5-00080-gca56a95 #6
>>>> [ 1514.074735] Call Trace:
>>>> [ 1514.074739]<IRQ>    [<ffffffff8104c560>] warn_slowpath_common+0x83/0x9b
>>>> [ 1514.074758] [<ffffffff8104c592>] warn_slowpath_null+0x1a/0x1c
>>>> [ 1514.074767] [<ffffffff81059409>] del_timer_sync+0xa9/0xc4
>>>> [ 1514.074775] [<ffffffff81059360>] ? process_timeout+0x10/0x10
>>>> [ 1514.074794] [<ffffffffa003c971>] ath_reset+0x43/0x1d0 [ath9k]
>>>> [ 1514.074804] [<ffffffff810524b6>] ? _local_bh_enable_ip+0xca/0xce
>>>> [ 1514.074821] [<ffffffffa0040e71>] ath_tx_complete_aggr+0x7c3/0x7dd
>>>> [ath9k]
>>>> [ 1514.074837] [<ffffffffa00406ae>] ? ath_tx_flush_tid+0xe0/0xe0 [ath9k]
>>>> [ 1514.074855] [<ffffffffa0042396>] ath_tx_tasklet+0x235/0x2cb [ath9k]
>>>> [ 1514.074871] [<ffffffffa003cd23>] ath9k_tasklet+0xf4/0x135 [ath9k]
>>>> [ 1514.074880] [<ffffffff81052112>] tasklet_action+0x8d/0xed
>>>> [ 1514.074889] [<ffffffff810526d4>] __do_softirq+0xdb/0x1ec
>>>> [ 1514.074899] [<ffffffff8107c0c9>] ? lock_release+0x165/0x18e
>>>> [ 1514.074910] [<ffffffff814a921c>] call_softirq+0x1c/0x30
>>>> [ 1514.074919] [<ffffffff8100ab5a>] do_softirq+0x4b/0xa1
>>>> [ 1514.074927] [<ffffffff810529f5>] irq_exit+0x5d/0xa8
>>>> [ 1514.074935] [<ffffffff814a9abe>] do_IRQ+0x8e/0xa5
>>>> [ 1514.074945] [<ffffffff814a1793>] common_interrupt+0x13/0x13
>>>> [ 1514.074950]<EOI>    [<ffffffff81071178>] ? current_kernel_time+0x13/0x34
>>>> [ 1514.074968] [<ffffffff814a7fba>] ? sysret_check+0x2e/0x69
>>>> [ 1514.074977] [<ffffffff8107c5b4>] ?
>>>> trace_hardirqs_on_caller+0x10b/0x12f
>>>> [ 1514.074988] [<ffffffff8109e501>] audit_syscall_entry+0x11c/0x148
>>>> [ 1514.074998] [<ffffffff8122ef3e>] ? trace_hardirqs_on_thunk+0x3a/0x3f
>>>> [ 1514.075076] [<ffffffff814a8089>] auditsys+0x19/0x4a
>>>> [ 1514.075084] ---[ end trace 834e058f0ef2c378 ]---
>>>> [ 1514.075092] ------------[ cut here ]------------
>>>> [ 1514.075101] WARNING: at kernel/softirq.c:98
>>>> __local_bh_disable+0x45/0xb1()
>>>> [ 1514.075108] Hardware name: MacBookPro2,2
>>>> [ 1514.075113] Modules linked in: fuse 8021q cpufreq_ondemand garp stp
>>>> acpi_cpufreq llc freq_table mperf ipt_REJECT nf_conntrack_ipv4
>>>> nf_defrag_ipv4 xt_state nf_conntrack iptable_filter ip_tables arc4 radeon
>>>> ath9k mac80211 ttm ath9k_common drm_kms_helper ath9k_hw drm ath cfg80211
>>>> uvcvideo videodev btusb bluetooth sky2 v4l2_compat_ioctl32 appletouch
>>>> iTCO_wdt i2c_i801 joydev i2c_algo_bit iTCO_vendor_support applesmc rfkill
>>>> i2c_core input_polldev apple_bl video microcode [last unloaded:
>>>> scsi_wait_scan]
>>>> [ 1514.075271] Pid: 1550, comm: threaded-ml Tainted: G W
>>>> 3.0.0-rc5-00080-gca56a95 #6
>>>> [ 1514.075278] Call Trace:
>>>> [ 1514.075283]<IRQ>    [<ffffffff8104c560>] warn_slowpath_common+0x83/0x9b
>>>> [ 1514.075303] [<ffffffff814a1061>] ? _raw_spin_lock_bh+0x16/0x45
>>>> [ 1514.075313] [<ffffffff8104c592>] warn_slowpath_null+0x1a/0x1c
>>>> [ 1514.075324] [<ffffffff810522aa>] __local_bh_disable+0x45/0xb1
>>>> [ 1514.075333] [<ffffffff8105232d>] local_bh_disable+0x17/0x19
>>>> [ 1514.075344] [<ffffffff814a1061>] _raw_spin_lock_bh+0x16/0x45
>>>> [ 1514.075362] [<ffffffffa003c98c>] ath_reset+0x5e/0x1d0 [ath9k]
>>>> [ 1514.075372] [<ffffffff810524b6>] ? _local_bh_enable_ip+0xca/0xce
>>>> [ 1514.075391] [<ffffffffa0040e71>] ath_tx_complete_aggr+0x7c3/0x7dd
>>>> [ath9k]
>>>> [ 1514.075409] [<ffffffffa00406ae>] ? ath_tx_flush_tid+0xe0/0xe0 [ath9k]
>>>> [ 1514.075428] [<ffffffffa0042396>] ath_tx_tasklet+0x235/0x2cb [ath9k]
>>>> [ 1514.075445] [<ffffffffa003cd23>] ath9k_tasklet+0xf4/0x135 [ath9k]
>>>> [ 1514.075456] [<ffffffff81052112>] tasklet_action+0x8d/0xed
>>>> [ 1514.075465] [<ffffffff810526d4>] __do_softirq+0xdb/0x1ec
>>>> [ 1514.075476] [<ffffffff8107c0c9>] ? lock_release+0x165/0x18e
>>>> [ 1514.075487] [<ffffffff814a921c>] call_softirq+0x1c/0x30
>>>> [ 1514.075496] [<ffffffff8100ab5a>] do_softirq+0x4b/0xa1
>>>> [ 1514.075505] [<ffffffff810529f5>] irq_exit+0x5d/0xa8
>>>> [ 1514.075514] [<ffffffff814a9abe>] do_IRQ+0x8e/0xa5
>>>> [ 1514.075524] [<ffffffff814a1793>] common_interrupt+0x13/0x13
>>>> [ 1514.075529]<EOI>    [<ffffffff81071178>] ? current_kernel_time+0x13/0x34
>>>> [ 1514.075548] [<ffffffff814a7fba>] ? sysret_check+0x2e/0x69
>>>> [ 1514.075559] [<ffffffff8107c5b4>] ?
>>>> trace_hardirqs_on_caller+0x10b/0x12f
>>>> [ 1514.075570] [<ffffffff8109e501>] audit_syscall_entry+0x11c/0x148
>>>> [ 1514.075580] [<ffffffff8122ef3e>] ? trace_hardirqs_on_thunk+0x3a/0x3f
>>>> [ 1514.075590] [<ffffffff814a8089>] auditsys+0x19/0x4a
>>>> [ 1514.075596] ---[ end trace 834e058f0ef2c379 ]---
>>>
>>> this commit seems to fix it, what did you do to get this warning?
>>>
>>
>> thanks! will revert this and see if it fixes this.
>
> :) no, I meant the commit should have fixed your issue. i could not
> understand, this commit should have been there before rc5 came.
> also please post your lspci. thanks.
>

Oops.. was looking and wondering something.. oh-well here is lspci


03:00.0 Network controller: Atheros Communications Inc. AR5008 Wireless 
Network Adapter (rev 01)
	Physical Slot: 1
	Control: I/O+ Mem+ BusMaster+ SpecCycle- MemWINV- VGASnoop- ParErr- 
Stepping- SERR- FastB2B- DisINTx-
	Status: Cap+ 66MHz- UDF- FastB2B- ParErr- DEVSEL=fast >TAbort- <TAbort- 
<MAbort- >SERR- <PERR- INTx-
	Latency: 0, Cache Line Size: 256 bytes
	Interrupt: pin A routed to IRQ 17
	Region 0: Memory at 50100000 (64-bit, non-prefetchable) [size=64K]
	Capabilities: [40] Power Management version 2
		Flags: PMEClk- DSI- D1+ D2- AuxCurrent=375mA 
PME(D0+,D1+,D2-,D3hot+,D3cold-)
		Status: D0 NoSoftRst- PME-Enable- DSel=0 DScale=0 PME-
	Capabilities: [50] MSI: Enable- Count=1/1 Maskable- 64bit-
		Address: 00000000  Data: 0000
	Capabilities: [60] Express (v1) Legacy Endpoint, MSI 00
		DevCap:	MaxPayload 128 bytes, PhantFunc 0, Latency L0s <128ns, L1 <2us
			ExtTag- AttnBtn- AttnInd- PwrInd- RBE- FLReset-
		DevCtl:	Report errors: Correctable- Non-Fatal- Fatal- Unsupported-
			RlxdOrd+ ExtTag- PhantFunc- AuxPwr- NoSnoop-
			MaxPayload 128 bytes, MaxReadReq 512 bytes
		DevSta:	CorrErr- UncorrErr+ FatalErr- UnsuppReq+ AuxPwr- TransPend-
		LnkCap:	Port #0, Speed 2.5GT/s, Width x1, ASPM L0s L1, Latency L0 
<512ns, L1 <64us
			ClockPM- Surprise- LLActRep- BwNot-
		LnkCtl:	ASPM Disabled; RCB 128 bytes Disabled- Retrain- CommClk+
			ExtSynch- ClockPM- AutWidDis- BWInt- AutBWInt-
		LnkSta:	Speed 2.5GT/s, Width x1, TrErr- Train- SlotClk+ DLActive- 
BWMgmt- ABWMgmt-
	Capabilities: [90] MSI-X: Enable- Count=1 Masked-
		Vector table: BAR=0 offset=00000000
		PBA: BAR=0 offset=00000000
	Capabilities: [100 v1] Advanced Error Reporting
		UESta:	DLP- SDES- TLP- FCP- CmpltTO- CmpltAbrt- UnxCmplt- RxOF- 
MalfTLP- ECRC- UnsupReq+ ACSViol-
		UEMsk:	DLP- SDES- TLP- FCP- CmpltTO- CmpltAbrt- UnxCmplt- RxOF- 
MalfTLP- ECRC- UnsupReq- ACSViol-
		UESvrt:	DLP+ SDES- TLP- FCP+ CmpltTO- CmpltAbrt- UnxCmplt- RxOF+ 
MalfTLP+ ECRC- UnsupReq- ACSViol-
		CESta:	RxErr- BadTLP- BadDLLP- Rollover- Timeout- NonFatalErr-
		CEMsk:	RxErr- BadTLP- BadDLLP- Rollover- Timeout- NonFatalErr-
		AERCap:	First Error Pointer: 14, GenCap+ CGenEn- ChkCap+ ChkEn-
	Capabilities: [140 v1] Virtual Channel
		Caps:	LPEVC=0 RefClk=100ns PATEntryBits=1
		Arb:	Fixed- WRR32- WRR64- WRR128-
		Ctrl:	ArbSelect=Fixed
		Status:	InProgress-
		VC0:	Caps:	PATOffset=00 MaxTimeSlots=1 RejSnoopTrans-
			Arb:	Fixed- WRR32- WRR64- WRR128- TWRR128- WRR256-
			Ctrl:	Enable+ ID=0 ArbSelect=Fixed TC/VC=ff
			Status:	NegoPending- InProgress-
	Kernel driver in use: ath9k
	Kernel modules: ath9k

>>
>> as for what I was doing, nothing just streaming radio, and cunducting
>> regular business, emails, twizzles, etc..
>
> ok, thanks.
>
>>
>>> commit f6b4e4d476b890e1ddebbed8ec4924f9c2750a31
>>> Author: Rajkumar Manoharan<rmanohar@....qualcomm.com>
>>> Date:   Fri Jun 24 17:38:13 2011 +0530
>>>
>>>      ath9k: Fix locking issue during tx completion
>>>
>>>      The received tx status of aggregated frame without BlockAck may
>>>      cause deaf state in AR5416 cards. So the driver does a reset to
>>>      recover. When this happens, we release the pcu_lock before doing
>>>      a reset as ath_rest acquires pcu_lock. This is ugly and also not
>>>      atomic. Fixing this addresses the TX DMA failure also.
>>>
>>>      ath_tx_complete_aggr can be called from different paths which
>>>      takes different variants of spin_lock. This patch also addresses
>>>      the following warning.
>>>
>>>      WARNING: at kernel/timer.c:1011 del_timer_sync+0x4e/0x50()
>>>      Call Trace:
>>>       <IRQ>     [<ffffffff8104be3a>] warn_slowpath_common+0x7a/0xb0
>>>       [<ffffffff8104be85>] warn_slowpath_null+0x15/0x20
>>>       [<ffffffff8105915e>] del_timer_sync+0x4e/0x50
>>>       [<ffffffffa03726be>] ath_reset+0x3e/0x210 [ath9k]
>>>       [<ffffffff8135cdaf>] ? _raw_spin_unlock_bh+0x1f/0x30
>>>       [<ffffffffa037760a>] ath_tx_complete_aggr.isra.26+0x54a/0xa40 [ath9k]
>>>
>>>      Signed-off-by: Rajkumar Manoharan<rmanohar@....qualcomm.com>
>>>      Signed-off-by: John W. Linville<linville@...driver.com>
>>>
>>>
>>>
>>>>
>>>> Justin P. Mattock
>>>> --
>>>> To unsubscribe from this list: send the line "unsubscribe linux-wireless"
>>>> in
>>>> the body of a message to majordomo@...r.kernel.org
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>>>>
>>>
>>>
>>>
>>
>>
>
>
>

Justin P. Mattock
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