Hello. I originally posted this problem to the linux-wireless list, and was redirected here. Here's the story so far:
I'm running a single board computer with a 600Mhz celeron processor. On
the minipci bus I have a
Ubiquiti SR71-12 802.11n card. Also attached is a shell script with the
commands I run to cause the oops.
Note that the first time the ifconfig line in this script is run, a
"SIOCSIFFLAGS:
Input/Output Error" is triggered, the kernel oops happens about 5
seconds after the ifconfig line is run a second time.
Pavel Roskin replied to my message on linux-wireless with the following:
>
>I can reproduce "Input/Output Error" with SR71-12, but not the oops
with the current linux-wireless.
>
>I know that it's caused by returning false in this code in file
drivers/net/wireless/ath/ath9k/calib.c, function
>ath9k_hw_init_cal():
>
> /* Poll for offset calibration complete */
> if (!ath9k_hw_wait(ah, AR_PHY_AGC_CONTROL,
AR_PHY_AGC_CONTROL_CAL,
> 0, AH_WAIT_TIMEOUT)) {
> ath_print(common, ATH_DBG_CALIBRATE,
> "offset calibration failed to "
> "complete in 1ms; noisy
environment?\n");
> return false;
> }
>
>With full debugging (modprobe ath9k debug=0xffffffff), the kernel
messages are (with some context):
>
>ath: Reset TXQ, inactive queue: 7
>ath: Reset TX queue: 8
>ath: tx ok 0x0 err 0x0 desc 0x10f eol 0x10f urn 0x0
>ath: Reset TX queue: 9
>ath: tx ok 0x0 err 0x0 desc 0x10f eol 0x10f urn 0x0
>ath: ah->misc_mode 0x4
>ath: timeout (100000 us) on reg 0x9860: 0xdeadbeef & 0x00000001 !=
0x00000000
>ath: offset calibration failed to complete in 1ms; noisy environment?
>ath: Unable to reset hardware; reset status -5 (freq 2412 MHz)
>
>I have access to various Ubiquiti cards, but SR71-12 is the only one
that fails. I know that it works in
>Windows XP with the Ubiquiti driver for other SR71 cards (the inf file
should be tweaked to recognize the
>revision of SR71-12). That makes me think the problem is not in the
hardware and not in the noisy environment.
>
>ath9k identifies the card as:
>
>phy0: Atheros AR9280 Rev:2 mem=0xffffc90010da0000, irq=18
>
># lspci -vnn -s 03:01.0
>03:01.0 Network controller [0280]: Atheros Communications Inc. AR922X
Wireless Network Adapter [168c:0029] (rev 01)
> Subsystem: Device [0777:4002]
> Flags: bus master, 66MHz, medium devsel, latency 168, IRQ 18
> Memory at fe3f0000 (32-bit, non-prefetchable) [size=64K]
> Capabilities: [44] Power Management version 2
> Kernel driver in use: ath9k
> Kernel modules: ath9k
>
>--
>Regards,
>Pavel Roskin
I have gotten this oops with kernel 2.6.31. After installing the
compat-wireless-2.6 package from november 18th, the system locks up
completely after bringing the interface up, instead of just the oops.
Thank you in advance for any help you guys can provide.
-Woody
wireless.sh
Description: wireless.sh
[ 292.816058] wlan0: Creating new IBSS network, BSSID 66:4a:0b:f1:cf:96 [ 293.001493] BUG: unable to handle kernel NULL pointer dereference at 00000018 [ 293.001658] IP: [<debccac1>] ath_beacon_setup+0x59/0xea [ath9k] [ 293.001804] *pde = 00000000 [ 293.001901] Oops: 0000 [#1] SMP [ 293.002032] last sysfs file: /sys/class/firmware/0000:01:07.0/loading [ 293.002105] Modules linked in: loop arc4 ecb ath9k mac80211 led_class ath cfg80211 rfkill parport_pc parport snd_intel8x0 button processor snd_ac97_codec ac97_bus snd_pcm snd_timer snd soundcore i2c_i801 snd_page_alloc serio_raw shpchp i2c_core pci_hotplug intel_agp rng_core agpgart pcspkr joydev evdev usbhid hid ext3 jbd mbcache sd_mod piix ide_pci_generic ide_core ata_generic ata_piix libata scsi_mod ehci_hcd uhci_hcd e100 mii floppy usbcore nls_base thermal fan thermal_sys [last unloaded: scsi_wait_scan] [ 293.004323] [ 293.004386] Pid: 1454, comm: phy0 Not tainted (2.6.31.6 #1) [ 293.004459] EIP: 0060:[<debccac1>] EFLAGS: 00010246 CPU: 0 [ 293.004558] EIP is at ath_beacon_setup+0x59/0xea [ath9k] [ 293.004629] EAX: 00000000 EBX: dc4d5000 ECX: dc81a974 EDX: 00000022 [ 293.004703] ESI: dc81a974 EDI: dc7360c0 EBP: dc4c8000 ESP: dc8bdd04 [ 293.004777] DS: 007b ES: 007b FS: 00d8 GS: 0000 SS: 0068 [ 293.004848] Process phy0 (pid: 1454, ti=dc8bc000 task=dc1e3ae0 task.ti=dc8bc000) [ 293.004848] Stack: [ 293.004848] dc81a974 c1013a49 00019000 dc4c8000 c1003996 00019000 00019000 00008240 [ 293.004848] <0> dc4c8000 00000087 00000000 deadbeef 0000007b 0000007b 000000d8 00000000 [ 293.004848] <0> c82dbeef dc4c8000 04001000 00000000 debbe8da dc187000 dc81a974 dc4c8000 [ 293.004848] Call Trace: [ 293.004848] [<c1013a49>] ? smp_apic_timer_interrupt+0x6c/0x76 [ 293.004848] [<c1003996>] ? apic_timer_interrupt+0x2a/0x30 [ 293.004848] [<debbe8da>] ? ath9k_hw_set_interrupts+0x1df/0x25d [ath9k] [ 293.004848] [<debccd1f>] ? ath_beacon_config+0x1cd/0x362 [ath9k] [ 293.004848] [<debcd117>] ? ath_beacon_alloc+0x1be/0x215 [ath9k] [ 293.004848] [<debce2f6>] ? ath9k_bss_info_changed+0x15d/0x31f [ath9k] [ 293.004848] [<debce199>] ? ath9k_bss_info_changed+0x0/0x31f [ath9k] [ 293.004848] [<dea26fb5>] ? ieee80211_bss_info_change_notify+0x10d/0x11d [mac80211] [ 293.004848] [<dea2b8d8>] ? __ieee80211_sta_join_ibss+0x334/0x3a6 [mac80211] [ 293.004848] [<c117152d>] ? extract_entropy+0x3e/0x84 [ 293.004848] [<dea2bc66>] ? ieee80211_sta_find_ibss+0x31c/0x3b0 [mac80211] [ 293.004848] [<c1021e2c>] ? update_curr+0x66/0x187 [ 293.004848] [<c10224a7>] ? dequeue_entity+0x10/0x11b [ 293.004848] [<dea2c2c2>] ? ieee80211_ibss_work+0x291/0x34f [mac80211] [ 293.004848] [<c1219da2>] ? schedule+0x811/0x87f [ 293.004848] [<c10287f0>] ? finish_task_switch+0x4a/0xca [ 293.004848] [<c103c4fb>] ? worker_thread+0x13e/0x1c0 [ 293.004848] [<dea2c031>] ? ieee80211_ibss_work+0x0/0x34f [mac80211] [ 293.004848] [<c103fa56>] ? autoremove_wake_function+0x0/0x2d [ 293.004848] [<c103c3bd>] ? worker_thread+0x0/0x1c0 [ 293.004848] [<c103f7b3>] ? kthread+0x6e/0x73 [ 293.004848] [<c103f745>] ? kthread+0x0/0x73 [ 293.004848] [<c1003b77>] ? kernel_thread_helper+0x7/0x10 [ 293.004848] Code: 18 ba 22 00 00 00 89 03 eb 0b c7 03 00 00 00 00 ba 02 00 00 00 8b 41 1c 89 43 04 8b 0c 24 8b 81 50 07 00 00 f6 81 e4 00 00 00 20 <8b> 70 18 74 05 8a 48 19 09 ce 8b 4f 50 89 e8 52 89 da 6a 00 6a [ 293.004848] EIP: [<debccac1>] ath_beacon_setup+0x59/0xea [ath9k] SS:ESP 0068:dc8bdd04 [ 293.004848] CR2: 0000000000000018 [ 293.010890] ---[ end trace 71bd7de86da68ba7 ]---
_______________________________________________ ath9k-devel mailing list ath9k-devel@lists.ath9k.org https://lists.ath9k.org/mailman/listinfo/ath9k-devel
