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Date: Tue, 1 Jun 2010 17:21:07 +0200
Message-ID: <AANLkTinmjlukRABwWWVuO6VRHrULcqB7Zk_HQZSDicKr@mail.gmail.com>
Subject: Re: IWL3945 problems in 2.6.35-rc1
From: Sedat Dilek <sedat.dilek@googlemail.com>
To: Maxim Levitsky <maximlevitsky@gmail.com>
Cc: linux-wireless <linux-wireless@vger.kernel.org>,
	iwlwifi maling list <ipw3945-devel@lists.sourceforge.net>
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Hi Maxim,

that's a known issue... and there were several mails to LKML and here
on the ML (as I see you are very active on both lists :-)).
Unfortunately, the patch in [1] didnt go into any (GIT) reposoitory. I know=
.

I am attaching the original patch and give it a meaningfull name, so
people see it on patchwork.kernel.org (linux-wireless).

Kind Regards,
- Sedat -

[1] http://bugzilla.intellinuxwireless.org/show_bug.cgi?id=3D2208

On Tue, Jun 1, 2010 at 4:57 PM, Maxim Levitsky <maximlevitsky@gmail.com> wr=
ote:
> On Tue, 2010-06-01 at 15:25 +0300, Maxim Levitsky wrote:
>> Hi,
>>
>> in 2.6.35-rc1 the wireless became just unusable.
>>
>> These are problems that I have:
>>
>> 1. very frequent oopses.This appears to be mention on the list already,
>> but patches I tried don't help.
>>
>> I currently use this bandaid patch, and I still get some crashes:
>
>
> The crash happens here:
>
> 0xec3d is in iwl3945_request_scan (/home/maxim/software/kernel/linux-2.6/=
drivers/net/wireless/iwlwifi/iwl3945-base.c:1878).
> 1873 =C2=A0 =C2=A0 =C2=A0 =C2=A0 =C2=A0 =C2=A0 =C2=A0 =C2=A0 =C2=A0 =C2=
=A0if (chan->band !=3D band)
> 1874 =C2=A0 =C2=A0 =C2=A0 =C2=A0 =C2=A0 =C2=A0 =C2=A0 =C2=A0 =C2=A0 =C2=
=A0 =C2=A0 =C2=A0 =C2=A0 =C2=A0continue;
> 1875
> 1876 =C2=A0 =C2=A0 =C2=A0 =C2=A0 =C2=A0 =C2=A0 =C2=A0 =C2=A0 =C2=A0 =C2=
=A0scan_ch->channel =3D chan->hw_value;
> 1877
> 1878 =C2=A0 =C2=A0 =C2=A0 =C2=A0 =C2=A0 =C2=A0 =C2=A0 =C2=A0 =C2=A0 =C2=
=A0ch_info =3D iwl_get_channel_info(priv, band, scan_ch->channel);
> 1879 =C2=A0 =C2=A0 =C2=A0 =C2=A0 =C2=A0 =C2=A0 =C2=A0 =C2=A0 =C2=A0 =C2=
=A0if (!is_channel_valid(ch_info)) {
> 1880 =C2=A0 =C2=A0 =C2=A0 =C2=A0 =C2=A0 =C2=A0 =C2=A0 =C2=A0 =C2=A0 =C2=
=A0 =C2=A0 =C2=A0 =C2=A0 =C2=A0IWL_DEBUG_SCAN(priv, "Channel %d is INVALID =
for this band.\n",
> 1881 =C2=A0 =C2=A0 =C2=A0 =C2=A0 =C2=A0 =C2=A0 =C2=A0 =C2=A0 =C2=A0 =C2=
=A0 =C2=A0 =C2=A0 =C2=A0 =C2=A0 =C2=A0 =C2=A0 =C2=A0 =C2=A0 =C2=A0 =C2=A0 =
=C2=A0 scan_ch->channel);
> 1882 =C2=A0 =C2=A0 =C2=A0 =C2=A0 =C2=A0 =C2=A0 =C2=A0 =C2=A0 =C2=A0 =C2=
=A0 =C2=A0 =C2=A0 =C2=A0 =C2=A0continue;
>
>
> The backtrace:
>
> <1>[14212.708840] BUG: unable to handle kernel paging request at 00000002=
ffffffb1
> <1>[14212.709870] IP: [<ffffffffa0305c0d>] iwl3945_request_scan+0x61d/0xf=
90 [iwl3945]
> <4>[14212.710763] PGD 0
> <0>[14212.711636] Oops: 0000 [#1] PREEMPT SMP
> <0>[14212.712519] last sysfs file: /sys/devices/pci0000:00/0000:00:01.0/0=
000:01:00.0/hwmon/hwmon1/temp1_input
> <4>[14212.713416] CPU 0
> <4>[14212.713432] Modules linked in: tg3 libphy iwl3945 iwlcore mac80211 =
cfg80211 ntfs vfat msdos fat lirc_ene0100 lirc_dev af_packet nfsd exportfs =
nfs lockd nfs_acl auth_rpcgss usb_storage usb_libusual cpufreq_powersave cp=
ufreq_conservative r852 snd_hda_codec_realtek uvcvideo sm_common cpufreq_us=
erspace acpi_cpufreq snd_hda_intel videodev mperf nand snd_hda_codec nand_i=
ds sdhci_pci iTCO_wdt v4l2_compat_ioctl32 joydev snd_hwdep nand_ecc uhci_hc=
d sunrpc iTCO_vendor_support sdhci ehci_hcd psmouse snd_pcm mmc_core mtd us=
bcore coretemp ac sg battery evdev serio_raw snd_page_alloc video nouveau t=
tm drm_kms_helper drm i2c_algo_bit [last unloaded: cfg80211]
> <4>[14212.718797]
> <4>[14212.718797] Pid: 4263, comm: iwl3945 Not tainted 2.6.35-rc1 #30 Net=
tiling/Aspire 5720
> <4>[14212.718797] RIP: 0010:[<ffffffffa0305c0d>] =C2=A0[<ffffffffa0305c0d=
>] iwl3945_request_scan+0x61d/0xf90 [iwl3945]
> <4>[14212.718797] RSP: 0018:ffff88006ce91c80 =C2=A0EFLAGS: 00010297
> <4>[14212.718797] RAX: ffff880066e74100 RBX: ffff88001b2c1dc0 RCX: 000000=
02ffffffb1
> <4>[14212.718797] RDX: 0000000000000000 RSI: 00000000ffff8800 RDI: ffff88=
001b2c1dc0
> <4>[14212.718797] RBP: ffff88006ce91d70 R08: 000000000000030e R09: 000000=
00ffffffff
> <4>[14212.718797] R10: 0000000000000058 R11: 0000000000000001 R12: 000000=
0000000000
> <4>[14212.718797] R13: ffff88001b295800 R14: 0000000000000000 R15: ffff88=
001b2958f2
> <4>[14212.718797] FS: =C2=A00000000000000000(0000) GS:ffff880002400000(00=
00) knlGS:0000000000000000
> <4>[14212.718797] CS: =C2=A00010 DS: 0000 ES: 0000 CR0: 000000008005003b
> <4>[14212.718797] CR2: 00000002ffffffb1 CR3: 000000000155b000 CR4: 000000=
00000006f0
> <4>[14212.718797] DR0: 0000000000000000 DR1: 0000000000000000 DR2: 000000=
0000000000
> <4>[14212.718797] DR3: 0000000000000000 DR6: 00000000ffff0ff0 DR7: 000000=
0000000400
> <4>[14212.718797] Process iwl3945 (pid: 4263, threadinfo ffff88006ce90000=
, task ffff88006d04a280)
> <0>[14212.718797] Stack:
> <4>[14212.718797] =C2=A0ffffffffa02c3810 ffff88006d04a2f0 ffff88006ce91cb=
0 ffffffff81036911
> <4>[14212.718797] <0> 0000000000000000 0000000000000001 ffff88006ce91cd0 =
ffffffff00000000
> <4>[14212.718797] <0> 0057000000000246 0000005800000021 ffff88006ce91fd8 =
0058ffff813a07bf
> <0>[14212.718797] Call Trace:
> <4>[14212.718797] =C2=A0[<ffffffffa02c3810>] ? iwl_bg_start_internal_scan=
+0x0/0x3d0 [iwlcore]
> <4>[14212.718797] =C2=A0[<ffffffff81036911>] ? get_parent_ip+0x11/0x50
> <4>[14212.718797] =C2=A0[<ffffffffa02c3810>] ? iwl_bg_start_internal_scan=
+0x0/0x3d0 [iwlcore]
> <4>[14212.718797] =C2=A0[<ffffffffa02c3b2a>] iwl_bg_start_internal_scan+0=
x31a/0x3d0 [iwlcore]
> <4>[14212.718797] =C2=A0[<ffffffff81056dfe>] ? worker_thread+0x1ce/0x390
> <4>[14212.718797] =C2=A0[<ffffffff81056e50>] worker_thread+0x220/0x390
> <4>[14212.718797] =C2=A0[<ffffffff81056dfe>] ? worker_thread+0x1ce/0x390
> <4>[14212.718797] =C2=A0[<ffffffff8105bc80>] ? autoremove_wake_function+0=
x0/0x40
> <4>[14212.718797] =C2=A0[<ffffffff81056c30>] ? worker_thread+0x0/0x390
> <4>[14212.718797] =C2=A0[<ffffffff8105b7fe>] kthread+0xae/0xc0
> <4>[14212.718797] =C2=A0[<ffffffff81003b94>] kernel_thread_helper+0x4/0x1=
0
> <4>[14212.718797] =C2=A0[<ffffffff8105b750>] ? kthread+0x0/0xc0
> <4>[14212.718797] =C2=A0[<ffffffff81003b90>] ? kernel_thread_helper+0x0/0=
x10
> <0>[14212.718797] Code: ff ff 41 8d 52 ff 66 89 95 56 ff ff ff eb 14 0f 1=
f 80 00 00 00 00 41 ff c4 44 3b 60 0c 0f 83 eb 00 00 00 49 63 d4 48 8b 4c d=
0 38 <44> 3b 31 75 e6 0f b7 41 06 44 89 f6 41 88 47 01 0f b6 d0 48 89
> <1>[14212.718797] RIP =C2=A0[<ffffffffa0305c0d>] iwl3945_request_scan+0x6=
1d/0xf90 [iwl3945]
> <4>[14212.718797] =C2=A0RSP <ffff88006ce91c80>
> <0>[14212.718797] CR2: 00000002ffffffb1
> <4>[14212.760163] ---[ end trace 7075fd19298c88a3 ]---
> <0>[14212.761267] Kernel panic - not syncing: Fatal exception
> <4>[14212.762226] Pid: 4263, comm: iwl3945 Tainted: G =C2=A0 =C2=A0 =C2=
=A0D =C2=A0 =C2=A0 2.6.35-rc1 #30
> <4>[14212.763193] Call Trace:
> <4>[14212.764143] =C2=A0[<ffffffff8139e487>] panic+0x90/0x10a
> <4>[14212.765084] =C2=A0[<ffffffff8100737c>] oops_end+0xcc/0xe0
> <4>[14212.765095] =C2=A0[<ffffffff81027c13>] no_context+0xf3/0x260
> <4>[14212.765106] =C2=A0[<ffffffff810622e5>] ? sched_clock_local+0x25/0x9=
0
> <4>[14212.765116] =C2=A0[<ffffffff81027e95>] __bad_area_nosemaphore+0x115=
/0x1d0
> <4>[14212.765128] =C2=A0[<ffffffff81027f5e>] bad_area_nosemaphore+0xe/0x1=
0
> <4>[14212.765138] =C2=A0[<ffffffff810283c6>] do_page_fault+0x2e6/0x390
> <4>[14212.765148] =C2=A0[<ffffffff810622e5>] ? sched_clock_local+0x25/0x9=
0
> <4>[14212.765158] =C2=A0[<ffffffff81062410>] ? sched_clock_cpu+0xc0/0x110
> <4>[14212.765169] =C2=A0[<ffffffff8100add7>] ? native_sched_clock+0x27/0x=
80
> <4>[14212.765179] =C2=A0[<ffffffff810622e5>] ? sched_clock_local+0x25/0x9=
0
> <4>[14212.765191] =C2=A0[<ffffffff813a309f>] page_fault+0x1f/0x30
> <4>[14212.765207] =C2=A0[<ffffffffa0305c0d>] ? iwl3945_request_scan+0x61d=
/0xf90 [iwl3945]
> <4>[14212.765232] =C2=A0[<ffffffffa02c3810>] ? iwl_bg_start_internal_scan=
+0x0/0x3d0 [iwlcore]
> <4>[14212.765246] =C2=A0[<ffffffff81036911>] ? get_parent_ip+0x11/0x50
> <4>[14212.765266] =C2=A0[<ffffffffa02c3810>] ? iwl_bg_start_internal_scan=
+0x0/0x3d0 [iwlcore]
> <4>[14212.765286] =C2=A0[<ffffffffa02c3b2a>] iwl_bg_start_internal_scan+0=
x31a/0x3d0 [iwlcore]
> <4>[14212.765299] =C2=A0[<ffffffff81056dfe>] ? worker_thread+0x1ce/0x390
> <4>[14212.765310] =C2=A0[<ffffffff81056e50>] worker_thread+0x220/0x390
> <4>[14212.765320] =C2=A0[<ffffffff81056dfe>] ? worker_thread+0x1ce/0x390
> <4>[14212.765333] =C2=A0[<ffffffff8105bc80>] ? autoremove_wake_function+0=
x0/0x40
> <4>[14212.765344] =C2=A0[<ffffffff81056c30>] ? worker_thread+0x0/0x390
> <4>[14212.765353] =C2=A0[<ffffffff8105b7fe>] kthread+0xae/0xc0
> <4>[14212.765365] =C2=A0[<ffffffff81003b94>] kernel_thread_helper+0x4/0x1=
0
> <4>[14212.765376] =C2=A0[<ffffffff8105b750>] ? kthread+0x0/0xc0
> <4>[14212.765386] =C2=A0[<ffffffff81003b90>] ? kernel_thread_helper+0x0/0=
x10
> <3>[14212.765402] [drm:drm_fb_helper_panic] *ERROR* panic occurred, switc=
hing back to text console
>>
>> diff --git a/drivers/net/wireless/iwlwifi/iwl3945-base.c b/drivers/net/w=
ireless/iwlwifi/iwl3945-base.c
>> index 3e5bffb..1aef988 100644
>> --- a/drivers/net/wireless/iwlwifi/iwl3945-base.c
>> +++ b/drivers/net/wireless/iwlwifi/iwl3945-base.c
>> @@ -1861,6 +1861,11 @@ static int iwl3945_get_channels_for_scan(struct i=
wl_priv *priv,
>> =C2=A0 =C2=A0 =C2=A0 =C2=A0 if (!sband)
>> =C2=A0 =C2=A0 =C2=A0 =C2=A0 =C2=A0 =C2=A0 =C2=A0 =C2=A0 return 0;
>>
>> + =C2=A0 =C2=A0 =C2=A0 if(!priv->scan_request) {
>> + =C2=A0 =C2=A0 =C2=A0 =C2=A0 =C2=A0 =C2=A0 =C2=A0 WARN_ON(1);
>> + =C2=A0 =C2=A0 =C2=A0 =C2=A0 =C2=A0 =C2=A0 =C2=A0 return 0;
>> + =C2=A0 =C2=A0 =C2=A0 }
>> +
>> =C2=A0 =C2=A0 =C2=A0 =C2=A0 active_dwell =3D iwl_get_active_dwell_time(p=
riv, band, n_probes);
>> =C2=A0 =C2=A0 =C2=A0 =C2=A0 passive_dwell =3D iwl_get_passive_dwell_time=
(priv, band, vif);
>>
>>
>> 2. mulicast/broadcast is broken.
>> this results in DHCP non working on open access point.
>> It seems that DHCP does work on my home wireless, but avahi-autoipd does=
n't see any neighbours, and this is annoying.
>> It can be worked around by doing (sudo ifconfig wlan0 promisc)
>>
>>
> Best regards,
> =C2=A0 =C2=A0 =C2=A0 =C2=A0Maxim Levitsky
>
> --
> To unsubscribe from this list: send the line "unsubscribe linux-wireless"=
 in
> the body of a message to majordomo@vger.kernel.org
> More majordomo info at =C2=A0http://vger.kernel.org/majordomo-info.html
>

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