Date: Sun, 14 Dec 2014 11:55:16 -0800 From: Adrian Chadd <adrian@freebsd.org> To: David Blewett <david@dawninglight.net> Cc: "freebsd-wireless@freebsd.org" <freebsd-wireless@freebsd.org> Subject: Re: Problem with Atheros adapter (TP-LINK TL-WDN4800, AR9380) Message-ID: <CAJ-Vmom08p1XnfybxXusB5m6z%2B54xp%2BXbR0-Snuvq1u31_3rgw@mail.gmail.com> In-Reply-To: <CAFzAthaGfsGup8np5BvciTOxoy7-Hr4_wUC285L=NvGn_xt4yg@mail.gmail.com> References: <CAFzAthbg6sc5Y_NBa5EanMK_qhBjaDEvE15mvLkSL5NzAT2BmA@mail.gmail.com> <CAJ-Vmony_WiAOcj2a3m5u7Nxz2K17TDG=pfhw5Qa%2BbEYhY6cNQ@mail.gmail.com> <CAFzAthaGfsGup8np5BvciTOxoy7-Hr4_wUC285L=NvGn_xt4yg@mail.gmail.com>
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Aha! Listen time is 0. Hm!
Just add this at line 1179 and recompile:
if (ani_state->listen_time == 0)
return;
it's possible that it'll happen; it shoud be bailing out sooner rather
than later.
-adrian
On 14 December 2014 at 11:53, David Blewett <david@dawninglight.net> wrote:
> If this would be easier on IRC, I'm BlueAidan on Freenode.
>
> Output:
>
> (kgdb) list *0xffffffff8045161d
> 0xffffffff8045161d is in ar9300_ani_ar_poll
> (/usr/src/sys/contrib/dev/ath/ath_hal/ar9300/ar9300_ani.c:1180).
> 1175 */
> 1176 if (!DO_ANI(ah)) {
> 1177 return;
> 1178 }
> 1179
> 1180 ofdm_phy_err_rate =
> 1181 ani_state->ofdm_phy_err_count * 1000 /
> ani_state->listen_time;
> 1182 cck_phy_err_rate =
> 1183 ani_state->cck_phy_err_count * 1000 /
> ani_state->listen_time;
> 1184
>
> Thanks,
>
> David Blewett
>
> On Sun, Dec 14, 2014 at 2:39 PM, Adrian Chadd <adrian@freebsd.org> wrote:
>>
>> Hi!
>>
>> Hm, an integer divide by zero fault. Tsk.
>>
>> can you do this:
>>
>> kgdb /boot/kernel/kernel
>> list *0xffffffff8045161d
>>
>> Thanks!
>>
>>
>>
>> -adrian
>>
>>
>> On 14 December 2014 at 11:24, David Blewett <david@dawninglight.net>
>> wrote:
>> > Hi All:
>> >
>> > I've been having issues with a TP-LINK TL-WDN4800 PCI Express adapter
>> > [1]
>> > that seem to have become worse since upgrading to 10.1-RELEASE. Since
>> > then,
>> > I've had a couple of kernel panics. I use the adapter in hostapd mode as
>> > my
>> > main WiFi access point. I would appreciate any help in making my setup
>> > more
>> > reliable, and am open to trying to just about anything to help
>> > troubleshoot.
>> >
>> > The problems that I see are regular disconnections from a Macbook Pro
>> > client. When this happens, sometimes the wifi icon says it is connected,
>> > but I cannot actually transmit anything to the host (i.e., pings fail).
>> > The
>> > only recourse is to turn the mbp's wifi off, then back on. This
>> > *usually*
>> > succeeds, but sometimes does not. I also have an iPad that has similar
>> > issues; turning wifi off and back on is usually sufficient to restore
>> > connectivity.
>> >
>> > This is my /etc/rc.conf:
>> >
>> > wlans_ath0="wlan0"
>> > create_args_wlan0="wlanmode hostap bssid"
>> > ifconfig_wlan0="HOSTAP ssid MiddleEarth mode 11ng channel 2"
>> >
>> > and /etc/hostapd-wlan0.conf:
>> >
>> > interface=wlan0
>> > debug=2
>> > ctrl_interface=/var/run/hostapd
>> > ctrl_interface_group=wheel
>> > ssid=MiddleEarth
>> > wpa=2
>> > wpa_passphrase=xxxx
>> > wpa_key_mgmt=WPA-PSK
>> > wpa_pairwise=CCMP
>> >
>> > I see a lot of this in the logs:
>> >
>> > ath0: stuck beacon; resetting (bmiss count 8)
>> >
>> > However, from what I've read these are due to channel congestion and are
>> > to
>> > be expected. The kernel panics look like this:
>> >
>> > Fatal trap 18: integer divide fault while in kernel mode
>> > cpuid = 1; apic id = 11
>> > instruction pointer = 0x20:0xffffffff8045161d
>> > stack pointer = 0x28:0xfffffe00e43bb760
>> > frame pointer = 0x28:0xfffffe00e43bb7b0
>> > code segment = base 0x0, limit 0xfffff, type 0x1b
>> > = DPL 0, pres 1, long 1, def32 0, gran 1
>> > processor eflags = interrupt enabled, ath0: stuck beacon; resetting
>> > (bmiss count 8)
>> > resume, IOPL = 0
>> > current process = 12 (swi4: clock)
>> > trap number = 18
>> > panic: integer divide fault
>> > cpuid = 0
>> > KDB: stack backtrace:
>> > #0 0xffffffff80963000 at kdb_backtrace+0x60
>> > #1 0xffffffff80928125 at panic+0x155
>> > #2 0xffffffff80d24f1f at trap_fatal+0x38f
>> > #3 0xffffffff80d24b7c at trap+0x75c
>> > #4 0xffffffff80d0a782 at calltrap+0x8
>> > #5 0xffffffff8045b248 at ar9300_ani_poll_freebsd+0x48
>> > #6 0xffffffff804093d6 at ath_calibrate+0xf6
>> > #7 0xffffffff8093d557 at softclock_call_cc+0x177
>> > #8 0xffffffff8093d994 at softclock+0x94
>> > #9 0xffffffff808faf4b at intr_event_execute_handlers+0xab
>> > #10 0xffffffff808fb396 at ithread_loop+0x96
>> > #11 0xffffffff808f8b6a at fork_exit+0x9a
>> >
>> > Here is the pciconf output:
>> >
>> > ath0@pci0:2:0:0: class=0x028000 card=0x3112168c chip=0x0030168c
>> > rev=0x01
>> > hdr=0x00
>> > vendor = 'Atheros Communications Inc.'
>> > device = 'AR9300 Wireless LAN adaptor'
>> > class = network
>> >
>> > 1. http://www.tp-link.com/lk/products/details/?model=TL-WDN4800
>> >
>> > Thanks,
>> >
>> > David Blewett
>> > _______________________________________________
>> > freebsd-wireless@freebsd.org mailing list
>> > http://lists.freebsd.org/mailman/listinfo/freebsd-wireless
>> > To unsubscribe, send any mail to
>> > "freebsd-wireless-unsubscribe@freebsd.org"
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