From mboxrd@z Thu Jan 1 00:00:00 1970 Return-path: Received: from nm15.bullet.mail.ird.yahoo.com ([77.238.189.68]:27712 "EHLO nm15.bullet.mail.ird.yahoo.com" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S1755357Ab3FPRSC convert rfc822-to-8bit (ORCPT ); Sun, 16 Jun 2013 13:18:02 -0400 Message-ID: <1371403080.55562.YahooMailNeo@web133204.mail.ir2.yahoo.com> (sfid-20130616_191807_933662_4A17C049) Date: Sun, 16 Jun 2013 18:18:00 +0100 (BST) From: Jorge Bueno Moreno Reply-To: Jorge Bueno Moreno Subject: ath9k problems in AP mode for 3.2 kernels / 3.10-rc1-2 compat-drivers To: "linux-wireless@vger.kernel.org" MIME-Version: 1.0 Content-Type: text/plain; charset=iso-8859-1 Sender: linux-wireless-owner@vger.kernel.org List-ID: Hello, My card is: TP-LINK Model No. TL-WN951N Ver 1.0 that shows as: phy0: Atheros AR5416 MAC/BB Rev:2 AR2133 RF Rev:81: mem=0xf8ee0000, irq=20 and lspci: 05:05.0 Network controller: Atheros Communications Inc. AR5416 Wireless Network Adapter [AR5008 802.11(a)bgn] (rev 01)     Subsystem: Atheros Communications Inc. Device 3071     Flags: bus master, 66MHz, medium devsel, latency 168, IRQ 20     Memory at febc0000 (32-bit, non-prefetchable) [size=64K]     Capabilities: [40] #80 [0000]     Kernel driver in use: ath9k It works in STA mode in my debian squeeze with kernel 2.6.32-48 but not very well in AP mode given that, as soon as hostapd is run to go AP mode I get: Jun 16 12:33:33 hostname kernel: [   88.176476] irq 16: nobody cared (try booting with the "irqpoll" option) Jun 16 12:33:33 hostname kernel: [   88.176560] Pid: 0, comm: swapper Not tainted 2.6.32-5-686 #1 Jun 16 12:33:33 hostname kernel: [   88.176565] Call Trace: Jun 16 12:33:33 hostname kernel: [   88.176578]  [] ? __report_bad_irq+0x24/0x69 Jun 16 12:33:33 hostname kernel: [   88.176587]  [] ? __report_bad_irq+0x2b/0x69 Jun 16 12:33:33 hostname kernel: [   88.176595]  [] ? note_interrupt+0xe7/0x13e Jun 16 12:33:33 hostname kernel: [   88.176603]  [] ? handle_fasteoi_irq+0x7a/0x97 Jun 16 12:33:33 hostname kernel: [   88.176612]  [] ? handle_irq+0x17/0x1b Jun 16 12:33:33 hostname kernel: [   88.176620]  [] ? do_IRQ+0x38/0x89 Jun 16 12:33:33 hostname kernel: [   88.176628]  [] ? common_interrupt+0x30/0x38 Jun 16 12:33:33 hostname kernel: [   88.176637]  [] ? mwait_idle+0x62/0x6c Jun 16 12:33:33 hostname kernel: [   88.176645]  [] ? cpu_idle+0x89/0xa2 Jun 16 12:33:33 hostname kernel: [   88.176649] handlers: Jun 16 12:33:33 hostname kernel: [   88.176704] [] (ata_sff_interrupt+0x0/0xa2 [libata]) Jun 16 12:33:33 hostname kernel: [   88.176844] [] (usb_hcd_irq+0x0/0x71 [usbcore]) Jun 16 12:33:33 hostname kernel: [   88.176970] [] (rtl8169_interrupt+0x0/0x342 [r8169]) Jun 16 12:33:33 hostname kernel: [   88.177092] Disabling IRQ #16 and the wireless card stops working. As a workaround, I've been running the kernel with "irqpoll/irqfixup" option but now I needed to migrate to debian wheezy with kernel 3.2.46-1. With this version, kernel shows a similar error: Jun 16 17:37:27 hostname kernel: [16005.334858] irq 16: nobody cared (try booting with the "irqpoll" option) Jun 16 17:37:27 hostname kernel: [16005.335085] Pid: 0, comm: swapper/1 Not tainted 3.2.0-4-686-pae #1 Debian 3.2.46-1 Jun 16 17:37:27 hostname kernel: [16005.335094] Call Trace: Jun 16 17:37:27 hostname kernel: [16005.335117]  [] ? __report_bad_irq+0x1c/0x8d Jun 16 17:37:27 hostname kernel: [16005.335132]  [] ? note_interrupt+0x11a/0x188 Jun 16 17:37:27 hostname kernel: [16005.335146]  [] ? handle_irq_event_percpu+0x13f/0x155 Jun 16 17:37:27 hostname kernel: [16005.335160]  [] ? handle_level_irq+0x56/0x56 Jun 16 17:37:27 hostname kernel: [16005.335173]  [] ? handle_irq_event+0x21/0x3a Jun 16 17:37:27 hostname kernel: [16005.335186]  [] ? handle_level_irq+0x56/0x56 Jun 16 17:37:27 hostname kernel: [16005.335199]  [] ? handle_fasteoi_irq+0x60/0x85 Jun 16 17:37:27 hostname kernel: [16005.335207]    [] ? do_IRQ+0x2e/0x76 Jun 16 17:37:27 hostname kernel: [16005.335231]  [] ? common_interrupt+0x30/0x38 Jun 16 17:37:27 hostname kernel: [16005.335245]  [] ? update_group_power+0x67/0xbf Jun 16 17:37:27 hostname kernel: [16005.335260]  [] ? intel_idle+0xcc/0xfb Jun 16 17:37:27 hostname kernel: [16005.335274]  [] ? cpuidle_idle_call+0xcc/0x142 Jun 16 17:37:27 hostname kernel: [16005.335287]  [] ? cpu_idle+0x8b/0xaf Jun 16 17:37:27 hostname kernel: [16005.335302]  [] ? start_secondary+0x1be/0x1c3 Jun 16 17:37:27 hostname kernel: [16005.335311] handlers: Jun 16 17:37:27 hostname kernel: [16005.335435] [] ata_bmdma_interrupt Jun 16 17:37:27 hostname kernel: [16005.335599] [] usb_hcd_irq Jun 16 17:37:27 hostname kernel: [16005.335734] [] rtl8169_interrupt Jun 16 17:37:27 hostname kernel: [16005.335869] Disabling IRQ #16 but hangs completely showing traces in console and needing a hard reboot. If I apply same workaround booting the kernel with "irqpoll/irqfixup" I can go AP mode, but as soon as a station tries to connect, I get these messages flooding logs and AP doesn't work at all (I have to ifdown the interface to stop log flooding): Jun 16 18:09:50 hostname kernel: [  170.379181] ath: DMA failed to stop in 10 ms AR_CR=0x00000024 AR_DIAG_SW=0x42000020 DMADBG_7=0x000264c0 Jun 16 18:09:50 hostname kernel: [  170.388883] ath: Could not stop RX, we could be confusing the DMA engine when we start RX up Jun 16 18:09:50 hostname kernel: [  170.744131] ath: DMA failed to stop in 10 ms AR_CR=0x00000024 AR_DIAG_SW=0x42000020 DMADBG_7=0x00006040 Jun 16 18:09:50 hostname kernel: [  170.753829] ath: Could not stop RX, we could be confusing the DMA engine when we start RX up Jun 16 18:09:50 hostname kernel: [  171.109084] ath: DMA failed to stop in 10 ms AR_CR=0x00000024 AR_DIAG_SW=0x42000020 DMADBG_7=0x00006040 Jun 16 18:09:50 hostname kernel: [  171.118791] ath: Could not stop RX, we could be confusing the DMA engine when we start RX up Jun 16 18:09:51 hostname kernel: [  171.474058] ath: DMA failed to stop in 10 ms AR_CR=0x00000024 AR_DIAG_SW=0x42000020 DMADBG_7=0x00006040 Jun 16 18:09:51 hostname kernel: [  171.483760] ath: Could not stop RX, we could be confusing the DMA engine when we start RX up Jun 16 18:09:51 hostname kernel: [  171.838977] ath: DMA failed to stop in 10 ms AR_CR=0x00000024 AR_DIAG_SW=0x42000020 DMADBG_7=0x00006040 Jun 16 18:09:51 hostname kernel: [  171.848685] ath: Could not stop RX, we could be confusing the DMA engine when we start RX up Jun 16 18:09:52 hostname kernel: [  172.203898] ath: DMA failed to stop in 10 ms AR_CR=0x00000024 AR_DIAG_SW=0x42000020 DMADBG_7=0x00006040 Jun 16 18:09:52 hostname kernel: [  172.213600] ath: Could not stop RX, we could be confusing the DMA engine when we start RX up Jun 16 18:09:52 hostname kernel: [  172.568817] ath: DMA failed to stop in 10 ms AR_CR=0x00000024 AR_DIAG_SW=0x42000020 DMADBG_7=0x00006040 Jun 16 18:09:52 hostname kernel: [  172.578515] ath: Could not stop RX, we could be confusing the DMA engine when we start RX up Jun 16 18:09:52 hostname kernel: [  172.933750] ath: DMA failed to stop in 10 ms AR_CR=0x00000024 AR_DIAG_SW=0x42000020 DMADBG_7=0x00006040 Jun 16 18:09:52 hostname kernel: [  172.943450] ath: Could not stop RX, we could be confusing the DMA engine when we start RX up ... ... Jun 16 18:10:12 hostname kernel: [  192.683280] ath: Failed to stop TX DMA, queues=0x001! Jun 16 18:10:12 hostname kernel: [  192.707757] ath: Failed to stop TX DMA, queues=0x001! Jun 16 18:10:12 hostname kernel: [  192.736734] ath: DMA failed to stop in 10 ms AR_CR=0x00000024 AR_DIAG_SW=0x42000020 DMADBG_7=0x00004040 Jun 16 18:10:12 hostname kernel: [  192.756744] ath: Could not stop RX, we could be confusing the DMA engine when we start RX up Jun 16 18:10:12 hostname kernel: [  192.791133] ath: DMA failed to stop in 10 ms AR_CR=0x00000024 AR_DIAG_SW=0x42000020 DMADBG_7=0x00008040 Jun 16 18:10:12 hostname kernel: [  192.807675] ath: Could not stop RX, we could be confusing the DMA engine when we start RX up I have compiled and tried latest stable driver version: backports-3.10-rc1-2.tar.bz2 and snapshot: backports-20130607.tar.bz2 with same results. Final details on kernel driver versions used: VERSION 2.6.32-48 2.6.32-5-686 #1 SMP Fri May 10 08:33:48 UTC 2013 i686 ath9k                 238533  0 ath                     6026  1 ath9k led_class               1757  1 ath9k mac80211              123754  1 ath9k cfg80211               87809  3 mac80211,ath,ath9k modinfo ath9k filename:       /lib/modules/2.6.32-5-686/kernel/drivers/net/wireless/ath/ath9k/ath9k.ko license:        Dual BSD/GPL description:    Support for Atheros 802.11n wireless LAN cards. author:         Atheros Communications alias:          pci:v0000168Cd0000002Esv*sd*bc*sc*i* alias:          pci:v0000168Cd0000002Dsv*sd*bc*sc*i* alias:          pci:v0000168Cd0000002Csv*sd*bc*sc*i* alias:          pci:v0000168Cd0000002Bsv*sd*bc*sc*i* alias:          pci:v0000168Cd0000002Asv*sd*bc*sc*i* alias:          pci:v0000168Cd00000029sv*sd*bc*sc*i* alias:          pci:v0000168Cd00000027sv*sd*bc*sc*i* alias:          pci:v0000168Cd00000024sv*sd*bc*sc*i* alias:          pci:v0000168Cd00000023sv*sd*bc*sc*i* depends:        mac80211,led-class,ath,cfg80211 vermagic:       2.6.32-5-686 SMP mod_unload modversions 686 parm:           nohwcrypt:Disable hardware encryption (int) VERSION 3.2.46-1 3.2.0-4-686-pae #1 SMP Debian 3.2.46-1 i686 ath9k                  67806  0 ath9k_common           12648  1 ath9k ath9k_hw              311433  2 ath9k_common,ath9k ath                    17114  3 ath9k_hw,ath9k_common,ath9k mac80211              171389  1 ath9k cfg80211              113445  3 mac80211,ath,ath9k modinfo ath9k filename:       /lib/modules/3.2.0-4-686-pae/kernel/drivers/net/wireless/ath/ath9k/ath9k.ko license:        Dual BSD/GPL description:    Support for Atheros 802.11n wireless LAN cards. author:         Atheros Communications alias:          pci:v0000168Cd00000037sv*sd*bc*sc*i* alias:          pci:v0000168Cd00000034sv*sd*bc*sc*i* alias:          pci:v0000168Cd00000033sv*sd*bc*sc*i* alias:          pci:v0000168Cd00000032sv*sd*bc*sc*i* alias:          pci:v0000168Cd00000030sv*sd*bc*sc*i* alias:          pci:v0000168Cd0000002Esv*sd*bc*sc*i* alias:          pci:v0000168Cd0000002Dsv*sd*bc*sc*i* alias:          pci:v0000168Cd0000002Csv*sd*bc*sc*i* alias:          pci:v0000168Cd0000002Bsv*sd*bc*sc*i* alias:          pci:v0000168Cd0000002Asv*sd*bc*sc*i* alias:          pci:v0000168Cd00000029sv*sd*bc*sc*i* alias:          pci:v0000168Cd00000027sv*sd*bc*sc*i* alias:          pci:v0000168Cd00000024sv*sd*bc*sc*i* alias:          pci:v0000168Cd00000023sv*sd*bc*sc*i* depends:        ath9k_hw,ath9k_common,mac80211,ath,cfg80211 intree:         Y vermagic:       3.2.0-4-686-pae SMP mod_unload modversions 686 parm:           debug:Debugging mask (uint) parm:           nohwcrypt:Disable hardware encryption (int) parm:           blink:Enable LED blink on activity (int) parm:           btcoex_enable:Enable wifi-BT coexistence (int) Support/help to get this issue fixed will be much appreciated. Thank you. Regards, Jorge.