Problem with Atheros adapter (TP-LINK TL-WDN4800, AR9380)

[David Blewett]

​Okay, I've built a custom kernel with if_ath_pci as a module, rebooted
into the new kernel and got it running. I also enabled AH_DEBUG. Will let
you know how things go this week.​

Thanks,

David Blewett

On Sun, Dec 14, 2014 at 2:58 PM, David Blewett <david at dawninglight.net>
wrote:
>
> Okay, I can try to give that a go. Will take me a bit. I use ZFS on
> encrypted geli devices, and haven't tried building a custom kernel yet with
> this config.
>
> Thanks,
>
> David Blewett
>
> On Sun, Dec 14, 2014 at 2:55 PM, Adrian Chadd <adrian at freebsd.org> wrote:
>>
>> 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 at 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 at 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 at 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 at 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 at freebsd.org mailing list
>> >> > http://lists.freebsd.org/mailman/listinfo/freebsd-wireless
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>>
>