Re: iwlagn interrupt problem

From: Zdenek Kabelac
Date: Fri Dec 12 2008 - 09:05:42 EST




Dan Williams napsal(a):
On Fri, 2008-12-12 at 12:31 +0100, Zdenek Kabelac wrote:
Alexander E. Patrakov napsal(a):
2008/12/12 Zdenek Kabelac <zkabelac@xxxxxxxxxx>:
I assume that this backtrace I've got with 2.6.28-rc7 is the same issue ?
No, this is different. My issue is with unacceptable latency when
bringing the interface down. In your dmesg, the interface was never
brought up or down.

Hmm - it was something like an hour after resume when the problem started,

Here is timed part of the same backtrace:

[65627.782972] wlan0: associate with AP 00:11:d8:da:65:40
[65627.785569] wlan0: RX ReassocResp from 00:11:d8:da:65:40 (capab=0x401 status=0 aid=8)
[65627.785576] wlan0: associated
[69541.209873] wlan0: No ProbeResp from current AP 00:11:d8:da:65:40 - assume out of range
[69541.810104] iwl3945: Error sending REPLY_SCAN_CMD: time out after 500ms.
[69542.309861] iwl3945: Error sending REPLY_RXON_ASSOC: time out after 500ms.


The begging of my trace looked similar.

Should I open new bugzilla separately ?

If you can reproduce this, it sounds more like a firmware problem, so
Reinette is probably going to want you to enable firmware debugging in
the driver. Try removing the iwl3945 module with rmmod, then "modprobe
iwl3945 debug=0x43fff", reproduce this command timeout, and attach the
logs to whatever bug report you file.


Unfortunately I do not have a reproducing case and it happened just once on Wednesday after resume.

But when (if) it will repeat I'll try to reinsert module with debug - I think without this my bug is not resolvable right ?

Zdenek

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