[Bug 48642] iwlist scanning - hangs after wifi scan - kernel----2.6.15-23-686

karim saidkarim at gmail.com
Sun Jun 18 11:31:16 UTC 2006 

Hi 
I can confirme that:
My `uname -r`is: 2.6.15-23-686
iwlist ath0 scanning . hangs and no way to kil the process. dmesg related to this  issue is:

---------------------
[4296203.478000] ath_hal: module license 'Proprietary' taints kernel.
[4296203.480000] ath_hal: 0.9.14.9 (AR5210, AR5211, AR5212, RF5111, RF5112, RF2413)
[4296203.548000] wlan: 0.8.6.0 (EXPERIMENTAL)
[4296203.565000] ath_rate_sample: 1.2
[4296203.604000] ath_pci: 0.9.6.0 (EXPERIMENTAL)
[4296203.606000] PCI: Enabling device 0000:02:00.0 (0000 -> 0002)
[4296203.606000] ACPI: PCI Interrupt 0000:02:00.0[A] -> Link [LNKA] -> GSI 10 (level, low) -> IRQ 10
[4296204.044000] Build date: May 29 2006
[4296204.044000] Debugging version (IEEE80211)
[4296204.045000] ath0: 11b rates: 1Mbps 2Mbps 5.5Mbps 11Mbps
[4296204.045000] ath0: 11g rates: 1Mbps 2Mbps 5.5Mbps 11Mbps 6Mbps 9Mbps 12Mbps 18Mbps 24Mbps 36Mbps 48Mbps 54Mbps
[4296204.045000] ath0: turboG rates: 6Mbps 9Mbps 12Mbps 18Mbps 24Mbps 36Mbps 48Mbps 54Mbps
[4296204.045000] ath0: H/W encryption support: WEP AES AES_CCM TKIP
[4296204.045000] ath0: mac 5.9 phy 4.3 radio 4.6
[4296204.045000] ath0: Use hw queue 1 for WME_AC_BE traffic
[4296204.045000] ath0: Use hw queue 0 for WME_AC_BK traffic
[4296204.045000] ath0: Use hw queue 2 for WME_AC_VI traffic
[4296204.045000] ath0: Use hw queue 3 for WME_AC_VO traffic
[4296204.045000] ath0: Use hw queue 8 for CAB traffic
[4296204.045000] ath0: Use hw queue 9 for beacons
[4296204.045000] Debugging version (ATH)
[4296204.045000] ath0: Atheros 5212: mem=0x22000000, irq=10
[4296551.417000] pcmcia: Detected deprecated PCMCIA ioctl usage.
[4296551.417000] pcmcia: This interface will soon be removed from the kernel; please expect breakage unless you upgrade to new tools.
[4296551.418000] pcmcia: see http://www.kernel.org/pub/linux/utils/kernel/pcmcia/pcmcia.html for details.
[4296602.490000] cs: memory probe 0xa0000000-0xa0ffffff: clean.
[4296643.973000] pccard: card ejected from slot 0
[4296644.027000] ACPI: PCI interrupt for device 0000:02:00.0 disabled
[4296644.028000] PCMCIA: socket cf1e1028: *** DANGER *** unable to remove socket power
[4296651.097000] pccard: CardBus card inserted into slot 0
[4296651.098000] PCI: Enabling device 0000:02:00.0 (0000 -> 0002)
[4296651.098000] ACPI: PCI Interrupt 0000:02:00.0[A] -> Link [LNKA] -> GSI 10 (level, low) -> IRQ 10
[4296651.515000] Build date: May 29 2006
[4296651.515000] Debugging version (IEEE80211)
[4296651.516000] ath0: 11b rates: 1Mbps 2Mbps 5.5Mbps 11Mbps
[4296651.516000] ath0: 11g rates: 1Mbps 2Mbps 5.5Mbps 11Mbps 6Mbps 9Mbps 12Mbps 18Mbps 24Mbps 36Mbps 48Mbps 54Mbps
[4296651.517000] ath0: turboG rates: 6Mbps 9Mbps 12Mbps 18Mbps 24Mbps 36Mbps 48Mbps 54Mbps
[4296651.518000] ath0: H/W encryption support: WEP AES AES_CCM TKIP
[4296651.519000] ath0: mac 5.9 phy 4.3 radio 4.6
[4296651.519000] ath0: Use hw queue 1 for WME_AC_BE traffic
[4296651.520000] ath0: Use hw queue 0 for WME_AC_BK traffic
[4296651.520000] ath0: Use hw queue 2 for WME_AC_VI traffic
[4296651.521000] ath0: Use hw queue 3 for WME_AC_VO traffic
[4296651.521000] ath0: Use hw queue 8 for CAB traffic
[4296651.522000] ath0: Use hw queue 9 for beacons
[4296651.522000] Debugging version (ATH)
[4296651.522000] ath0: Atheros 5212: mem=0x22000000, irq=10
[4296758.452000] Unable to handle kernel paging request at virtual address 0000ffff
[4296758.452000]  printing eip:
[4296758.452000] d0b73313
[4296758.452000] *pde = 00000000
[4296758.452000] Oops: 0000 [#1]
[4296758.452000] PREEMPT SMP 
[4296758.452000] Modules linked in: ath_pci ath_rate_sample wlan ath_hal usbhid ppdev speedstep_lib cpufreq_userspace cpufreq_stats freq_table cpufreq_powersave cpufreq_ondemand cpufreq_conservative video tc1100_wmi sony_acpi pcc_acpi hotkey dev_acpi container button acpi_sbs battery ac i2c_acpi_ec ipv6 dm_mod md_mod lp pcmcia joydev snd_nm256 snd_ac97_codec snd_ac97_bus snd_pcm_oss snd_mixer_oss tsdev snd_pcm snd_timer snd_page_alloc parport_pc parport pcspkr snd soundcore floppy yenta_socket rsrc_nonstatic pcmcia_core psmouse serio_raw 3c59x mii i2c_piix4 i2c_core shpchp pci_hotplug intel_agp agpgart evdev ext3 jbd ide_generic uhci_hcd usbcore ide_disk piix generic thermal processor fan capability commoncap vga16fb vgastate fbcon tileblit font bitblit softcursor
[4296758.452000] CPU:    0
[4296758.452000] EIP:    0060:[<d0b73313>]    Tainted: P      VLI
[4296758.452000] EFLAGS: 00210246   (2.6.15-23-686) 
[4296758.452000] EIP is at read_ap_result+0x1c3/0x55b [wlan]
[4296758.452000] eax: 0000ffff   ebx: c239de94   ecx: 00000000   edx: ca2b8000
[4296758.452000] esi: ca2b80f5   edi: c28d701c   ebp: c28d701c   esp: c239dd70
[4296758.452000] ds: 007b   es: 007b   ss: 0068
[4296758.452000] Process iwlist (pid: 8890, threadinfo=c239c000 task=cac51ab0)
[4296758.452000] Stack: d09059a1 d0914888 c104335c c0151a22 c0151fe7 c104335c c23c0760 c28d8000 
[4296758.452000]        c0152686 c104335c 00000000 4495548c 06ccc5b0 00000001 00000000 c104335c 
[4296758.452000]        cfccd9ac 00200246 c0356984 00000002 00000000 00000044 c0152931 c0356180 
[4296758.452000] Call Trace:
[4296758.452000]  [<d09059a1>] ext3_dirty_inode+0x71/0x90 [ext3]
[4296758.452000]  [<c0151a22>] bad_range+0x42/0x60
[4296758.452000]  [<c0151fe7>] prep_new_page+0x47/0x80
[4296758.452000]  [<c0152686>] buffered_rmqueue+0x116/0x260
[4296758.452000]  [<c0152931>] get_page_from_freelist+0x71/0xc0
[4296758.452000]  [<c01529de>] __alloc_pages+0x5e/0x320
[4296758.452000]  [<d0b6e1c4>] ieee80211_iterate_nodes+0x6c/0xbc [wlan]
[4296758.452000]  [<d0b73150>] read_ap_result+0x0/0x55b [wlan]
[4296758.452000]  [<d0b74dc5>] ieee80211_ioctl_giwscan+0x5c/0xa8 [wlan]
[4296758.452000]  [<d0b73150>] read_ap_result+0x0/0x55b [wlan]
[4296758.452000]  [<c02a1827>] wireless_process_ioctl+0x667/0x7d0
[4296758.452000]  [<d0bd557b>] ath_ioctl_giwscan+0x0/0x18 [ath_pci]
[4296758.452000]  [<c02957fd>] dev_ioctl+0x28d/0x2f0
[4296758.452000]  [<c0185bdb>] do_ioctl+0x3b/0xa0
[4296758.452000]  [<c0185e2b>] vfs_ioctl+0x6b/0x230
[4296758.452000]  [<c0186078>] sys_ioctl+0x88/0xa0
[4296758.452000]  [<c0103457>] sysenter_past_esp+0x54/0x75
[4296758.452000] Code: 8b 43 04 89 42 04 89 ca 8b 84 24 dc 00 00 00 89 50 10 c7 03 00 00 00 00 66 c7 43 02 05 8b 8b 94 24 e0 00 00 00 8b 82 28 01 00 00 <0f> b7 00 69 c0 a0 86 01 00 89 43 04 66 c7 43 08 01 00 8b 8c 24 
[4296758.452000]  <6>note: iwlist[8890] exited with preempt_count 1
---------------------------------

I'am using xubuntu dapper with the above kernel 
Thanks for this great distribution.
I 'll try another wifi card to see if it is related to atheros driver only 
 
Karim

-- 
system half-hangs after wifi scan
https://launchpad.net/bugs/48642

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