Date: Sun, 14 Dec 2014 14:58:35 -0500 From: David Blewett <david@dawninglight.net> To: Adrian Chadd <adrian@freebsd.org> Cc: "freebsd-wireless@freebsd.org" <freebsd-wireless@freebsd.org> Subject: Re: Problem with Atheros adapter (TP-LINK TL-WDN4800, AR9380) Message-ID: <CAFzAthZrqZeXi1D3M5pzrW=d88JPuMeamZyqXOMp580v7OTGuA@mail.gmail.com> In-Reply-To: <CAJ-Vmom08p1XnfybxXusB5m6z%2B54xp%2BXbR0-Snuvq1u31_3rgw@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> <CAJ-Vmom08p1XnfybxXusB5m6z%2B54xp%2BXbR0-Snuvq1u31_3rgw@mail.gmail.com>
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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@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@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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