From owner-freebsd-wireless@FreeBSD.ORG Sun Dec 14 19:55:18 2014 Return-Path: Delivered-To: freebsd-wireless@freebsd.org Received: from mx1.freebsd.org (mx1.freebsd.org [IPv6:2001:1900:2254:206a::19:1]) (using TLSv1.2 with cipher AECDH-AES256-SHA (256/256 bits)) (No client certificate requested) by hub.freebsd.org (Postfix) with ESMTPS id 87B6834B for ; Sun, 14 Dec 2014 19:55:18 +0000 (UTC) Received: from mail-wg0-x231.google.com (mail-wg0-x231.google.com [IPv6:2a00:1450:400c:c00::231]) (using TLSv1 with cipher ECDHE-RSA-RC4-SHA (128/128 bits)) (Client CN "smtp.gmail.com", Issuer "Google Internet Authority G2" (verified OK)) by mx1.freebsd.org (Postfix) with ESMTPS id 16240877 for ; Sun, 14 Dec 2014 19:55:18 +0000 (UTC) Received: by mail-wg0-f49.google.com with SMTP id n12so12969371wgh.22 for ; Sun, 14 Dec 2014 11:55:16 -0800 (PST) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=gmail.com; s=20120113; h=mime-version:sender:in-reply-to:references:date:message-id:subject :from:to:cc:content-type; bh=sR/hnaJImSzvxYO9YwF+7My2+PLqIvQDukCFxGEgcR8=; b=b4ViWj5dVQW2jcf46q++0VD0rF3G2YvrqNekF5m2DuillSNZR/pccUSaLePmgKi9vC RUwJVvoe6TWVdF6Y04kq9SwYlwhWAphX8m4LysLkNFRBNRnsnA7KD/X2J/Axz+doc8KE y6EblHdfjh55V8Fsm9H6Asqg9DmwBOWM93hi0/w2hS6muNC7rRu5KTvTspSNJHIW0S84 Q1sP5MkvytybNLzd+w7ZCzaynl28SybOCXJ6v+bErinwB5048JI3hq5w06ym/TJTqBrR GDcmW3nkvnA4fKLdclIaDeeUyELFtMCj80SrjD4LnqbmKHYODxI36m3AR7aFNT1OYsKb emxQ== MIME-Version: 1.0 X-Received: by 10.194.108.9 with SMTP id hg9mr8179750wjb.68.1418586916440; Sun, 14 Dec 2014 11:55:16 -0800 (PST) Sender: adrian.chadd@gmail.com Received: by 10.216.106.195 with HTTP; Sun, 14 Dec 2014 11:55:16 -0800 (PST) In-Reply-To: References: Date: Sun, 14 Dec 2014 11:55:16 -0800 X-Google-Sender-Auth: ZgDufAMoO99-0dVPV9qXqjKN1Aw Message-ID: Subject: Re: Problem with Atheros adapter (TP-LINK TL-WDN4800, AR9380) From: Adrian Chadd To: David Blewett Content-Type: text/plain; charset=UTF-8 Cc: "freebsd-wireless@freebsd.org" X-BeenThere: freebsd-wireless@freebsd.org X-Mailman-Version: 2.1.18-1 Precedence: list List-Id: "Discussions of 802.11 stack, tools device driver development." List-Unsubscribe: , List-Archive: List-Post: List-Help: List-Subscribe: , X-List-Received-Date: Sun, 14 Dec 2014 19:55:18 -0000 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 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 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 >> 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"