Re: atheros panic (D-Link DWL-G520)

Weongyo Jeong wrote:
> My device is D-Link DWL-G520 and the device encountered a panic when I
> did `ifconfig ath0 up'.  The kernel was cvs-uped yesterday. The following
> are the panic message:
> 
> hostap# ifconfig ath0 up
> ath0: ath_chan_set: unable to reset channel 1 (2412 Mhz, flags 0x480 hal
> flags 0xc0)
> hostap# ath0: ath_chan_set: unable to reset channel 11 (2462 Mhz, flags
> 0x480 hal flags 0xc0)
> ath0: ath_chan_set: unable to reset channel 13 (2472 Mhz, flags 0x480
> hal flags 0xc0)
> ath0: ath_chan_set: unable to reset channel 3 (2422 Mhz, flags 0x480 hal
> flags 0xc0)
> ath0: ath_chan_set: unable to reset channel 8 (2447 Mhz, flags 0x480 hal
> flags 0xc0)
> ath0: hardware error; resetting
> ath0: 0x00080000 0x00000000 0x00000000, 0x00010000 0x00000000 0x00000000
> 
> 
> Fatal trap 18: integer divide fault while in kernel mode
> cpuid = 0; apic id = 00
> instruction pointer     = 0x20:0xc09f0d25
> stack pointer           = 0x28:0xcbd3acd8
> frame pointer           = 0x28:0xcbd3acd8
> code segment            = base 0x0, limit 0xfffff, type 0x1b
>                         = DPL 0, pres 1, def32 1, gran 1
> processor eflags        = interrupt enabled, IOPL = 0
> current process         = 11 (idle: cpu0)
> [thread pid 11 tid 100004 ]
> Stopped at      cpu_idle_default+0x5:   popl    %ebp
> db> bt
> Tracing pid 11 tid 100004 td 0xc20f7630
> cpu_idle_default(cbd3acf8,c0769e17,c0bad610,2,c0a9a19d,...) at
> cpu_idle_default+0x5
> cpu_idle(c0bad610,2,c0a9a19d,562,cbd3ad24,...) at cpu_idle+0x28
> sched_idletd(0,cbd3ad38,c0a9515d,314,c20f6aa0,...) at sched_idletd+0x37
> fork_exit(c0769de0,0,cbd3ad38) at fork_exit+0xb8
> fork_trampoline() at fork_trampoline+0x8
> --- trap 0, eip = 0, esp = 0xcbd3ad70, ebp = 0 ---
> db>
> 
> 
> And the below informations are device informations:
> 
> hostap# uname -a
> FreeBSD hostap 7.0-CURRENT FreeBSD 7.0-CURRENT #1: Thu Sep 27 02:43:04
> KST 2007     root_at_rumhostap:/usr/obj/usr/src/sys/GENERIC  i386
> 
> hostap# pciconf -lcv
> ath0_at_pci2:2:0:  class=0x020000 card=0x3a131186 chip=0x0013168c rev=0x01
> hdr=0x00
>     vendor     = 'Atheros Communications Inc.'
>     device     = 'AR5212, AR5213 802.11a/b/g Wireless Adapter'
>     class      = network
>     subclass   = ethernet
>     cap 01[44] = powerspec 2  supports D0 D3  current D0
> 
> hostap# sysctl -a | grep dev.ath.0
> dev.ath.0.%desc: Atheros 5212
> dev.ath.0.%driver: ath
> dev.ath.0.%location: slot=2 function=0
> dev.ath.0.%pnpinfo: vendor=0x168c device=0x0013 subvendor=0x1186
> subdevice=0x3a13 class=0x020000
> dev.ath.0.%parent: pci2
> dev.ath.0.smoothing_rate: 95
> dev.ath.0.sample_rate: 10
> dev.ath.0.countrycode: 0
> dev.ath.0.regdomain: 48
> dev.ath.0.slottime: 9
> dev.ath.0.acktimeout: 96
> dev.ath.0.ctstimeout: 96
> dev.ath.0.softled: 0
> dev.ath.0.ledpin: 0
> dev.ath.0.ledon: 0
> dev.ath.0.ledidle: 2700
> dev.ath.0.txantenna: 0
> dev.ath.0.rxantenna: 0
> dev.ath.0.diversity: 0
> dev.ath.0.txintrperiod: 5
> dev.ath.0.diag: 0
> dev.ath.0.tpscale: 0
> dev.ath.0.tpc: 0
> dev.ath.0.tpack: 63
> dev.ath.0.tpcts: 63
> dev.ath.0.fftxqmin: 2
> dev.ath.0.fftxqmax: 50
> dev.ath.0.monpass: 24
> 
> hostap# ifconfig ath0 list channel
> Channel   1 : 2412  Mhz 11g          Channel   8 : 2447  Mhz 11g          
> Channel   2 : 2417  Mhz 11g          Channel   9 : 2452  Mhz 11g          
> Channel   3 : 2422  Mhz 11g          Channel  10 : 2457  Mhz 11g          
> Channel   4 : 2427  Mhz 11g          Channel  11 : 2462  Mhz 11g          
> Channel   5 : 2432  Mhz 11g          Channel  12 : 2467  Mhz 11g          
> Channel   6 : 2437  Mhz 11g Turbo    Channel  13 : 2472  Mhz 11g          
> Channel   7 : 2442  Mhz 11g          
> 
> stap# /sbin/ifconfig 
> ath0: flags=8802<BROADCAST,SIMPLEX,MULTICAST> metric 0 mtu 1500
>         ether 00:1b:11:1a:ee:32
>         media: IEEE 802.11 Wireless Ethernet autoselect (autoselect)
>         status: no carrier
>         ssid "" channel 1 (2412 Mhz 11b)
>         authmode OPEN privacy OFF txpowmax 100 bmiss 7 scanvalid 60 bgscan
>         bgscanintvl 300 bgscanidle 250 roam:rssi11b 14 roam:rate11b 1 burst
> 
> hostap# dmesg | grep -i ath
> ath_hal: 0.9.20.3 (AR5210, AR5211, AR5212, RF5111, RF5112, RF2413, RF5413)
> ath0: <Atheros 5212> mem 0xe7000000-0xe700ffff irq 11 at device 2.0 on pci2
> ath0: [ITHREAD]
> ath0: using obsoleted if_watchdog interface
> ath0: Ethernet address: 00:1b:11:1a:ee:32
> ath0: mac 7.9 phy 4.5 radio 5.6

Unfortunately the value of status isn't printed when the ath_hal_reset
calls fail.  Please add that to the printf in ath_chan_set.

Not sure where the divide fault comes from; the stack trace doesn't
provide much help.  If you don't have INVARIANTS enabled you should do
that in case it catches what's going on before the panic happens.

	Sam