Bug 233364 - zd1211rw and zd1211rw_mac80211 interact really, really badly
zd1211rw and zd1211rw_mac80211 interact really, really badly
Status: CLOSED RAWHIDE
Product: Fedora
Classification: Fedora
Component: kernel (Show other bugs)
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All Linux
medium Severity high
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Assigned To: John W. Linville
Brian Brock
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Depends On:
Blocks: FC7Blocker
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Reported: 2007-03-21 16:12 EDT by Richard Hughes
Modified: 2007-11-30 17:11 EST (History)
2 users (show)

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Fixed In Version:
Doc Type: Bug Fix
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Last Closed: 2007-05-10 20:28:19 EDT
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Description Richard Hughes 2007-03-21 16:12:01 EDT
Description of problem:
I'm using a laptop with an internal ipw1945 network adapter, and so now with
recent rawhide kernels the iwlwifi driver gets loaded.
I'm also using a USB network adapter (as the ipw1945 does not work yet), a
zd1211rw based adapter. Now with rawhide the zd1211rw_mac80211, iwlwifi *and*
the zd1211rw driver get loaded, leading to the oops below.

Probably either the zd1211rw *or* the zd1211rw_mac80211 should be turned on in
the config, not both.

Version-Release number of selected component (if applicable):
2.6.20-1.2960.fc7

How reproducible:
Always, usually during boot (which also disables the keyboard).

Steps to Reproduce:
1. Boot with a zd1211rw USB dongle attached.
2. Boom.

Additional info:

Modules linked in: zd1211rw ieee80211softmac ieee80211 ieee80211_crypt
zd1211rw_mac80211 cpufreq_ondemand cpufreq_powersave cpufreq_conservative rfcomm
l2cap xt_tcpudp ip6t_REJECT ip6table_filter ip6_tables x_tables dm_mirror
dm_multipath dm_mod video sbs i2c_ec button dock battery asus_acpi ac ipv6
parport_pc lp parport arc4 ecb blkcipher snd_hda_intel snd_hda_codec
snd_seq_dummy snd_seq_oss snd_seq_midi_event fw_ohci snd_seq hci_usb bluetooth
iwlwifi fw_core rtc_cmos mac80211 8139cp snd_seq_device rtc_core 8139too rtc_lib
snd_pcm_oss mii cfg80211 sdhci mmc_core snd_mixer_oss iTCO_wdt
iTCO_vendor_support snd_pcm serio_raw snd_timer snd soundcore i2c_i801
snd_page_alloc i2c_core pcspkr sr_mod cdrom joydev sg ata_piix ata_generic
libata sd_mod scsi_mod ext3 jbd mbcache ehci_hcd ohci_hcd uhci_hcd
CPU:    0
EIP:    0060:[<c04352f5>]    Not tainted VLI
EFLAGS: 00010246   (2.6.20-1.2999.fc7 #1)
EIP is at queue_work+0x24/0x4d
eax: 00000008   ebx: 00000000   ecx: 00000000   edx: f2e7b0b0
esi: 00000000   edi: f2e782e0   ebp: c2498cfc   esp: c2498cf4
ds: 007b   es: 007b   fs: 00d8  gs: 0000  ss: 0068
Process events/0 (pid: 8, ti=c2498000 task=c2494030 task.ti=c2498000)
Stack: f2e791e0 f30ab6e0 c2498d1c f8a9271b f2eb8c9c c2498d1c f8a40116 f75691f8 
       f30ab6e0 f2e782e0 c2498e1c f8a42880 f30ab6e0 f2d01000 f8a4ae7e 00000000 
       00000002 0000002d 0000002f 00000036 000000d7 00000001 00000000 00000089 
Call Trace:
 [<c04061ed>] show_trace_log_lvl+0x1a/0x2f
 [<c040629d>] show_stack_log_lvl+0x9b/0xa3
 [<c040645d>] show_registers+0x1b8/0x289
 [<c040665b>] die+0x12d/0x242
 [<c061727e>] do_page_fault+0x3ee/0x4ba
 [<c0615a14>] error_code+0x7c/0x84
 [<f8a9271b>] ipw_rate_scale_rate_init+0xda/0xe2 [iwlwifi]
 [<f8a42880>] ieee80211_rx_mgmt_assoc_resp+0x571/0x5cb [mac80211]
 [<f8a437f1>] ieee80211_sta_work+0x99e/0x1482 [mac80211]
 [<c043514f>] run_workqueue+0x89/0x145
 [<c0435b6b>] worker_thread+0xf8/0x124
 [<c0438357>] kthread+0xb3/0xdc
 [<c0405cd7>] kernel_thread_helper+0x7/0x10
 =======================
Code: 72 ff ff ff 5b 5d c3 55 89 c1 89 e5 56 53 64 8b 35 04 00 00 00 f0 0f ba 2a
00 19 c0 31 db 85 c0 75 2c 8b 1d a8 06 7f c0 8d 41 08 <39> 41 08 8d 42 04 0f 45
de 39 42 04 74 04 0f 0b eb fe 8b 01 f7 
EIP: [<c04352f5>] queue_work+0x24/0x4d SS:ESP 0068:c2498cf4
ADDRCONF(NETDEV_CHANGE): wlan1: link becomes ready
wlan1: duplicate address detected!
Comment 1 John W. Linville 2007-04-18 15:39:25 EDT
Can you still recreate this with current rawhide kernels?

BTW, I think that summary change was wrong, as the stack trace points directly 
at the iwlwifi driver...
Comment 2 John W. Linville 2007-05-10 20:28:19 EDT
I have disabled the softmac-based "zd1211rw" driver, in favor 
of "zd1211rw-mac80211"...
Comment 3 Richard Hughes 2007-05-17 07:23:52 EDT
Yes, and this fixes the problem. Thanks John.

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