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Bug 234713 - iwlwifi lockdep report (failure to load firmware)
Summary: iwlwifi lockdep report (failure to load firmware)
Alias: None
Product: Fedora
Classification: Fedora
Component: kernel
Version: rawhide
Hardware: x86_64
OS: Linux
Target Milestone: ---
Assignee: John W. Linville
QA Contact: Brian Brock
Depends On:
TreeView+ depends on / blocked
Reported: 2007-03-31 18:32 UTC by Bernd Bartmann
Modified: 2007-11-30 22:12 UTC (History)
0 users

Fixed In Version:
Doc Type: Bug Fix
Doc Text:
Clone Of:
Last Closed: 2007-04-05 18:26:13 UTC

Attachments (Terms of Use)
output with dmesh with kernel calltrace (deleted)
2007-03-31 18:33 UTC, Bernd Bartmann
no flags Details
output of lspci -v (deleted)
2007-03-31 18:34 UTC, Bernd Bartmann
no flags Details

Description Bernd Bartmann 2007-03-31 18:32:17 UTC
From Bugzilla Helper:
User-Agent: Mozilla/5.0 (Windows; U; Windows NT 5.1; de; rv: Gecko/20070219 Firefox/

Description of problem:
I found a calltrace during boot on my DELL D620 laptop with FC7T3 x86_64.

Version-Release number of selected component (if applicable):

How reproducible:

Steps to Reproduce:
1. try FC7T3 on a DELL D620

Actual Results:

Expected Results:

Additional info:

Comment 1 Bernd Bartmann 2007-03-31 18:33:43 UTC
Created attachment 151354 [details]
output with dmesh with kernel calltrace

Comment 2 Bernd Bartmann 2007-03-31 18:34:35 UTC
Created attachment 151355 [details]
output of lspci -v

Comment 3 Johannes Berg 2007-04-05 18:19:39 UTC
The bug is actually in iwlwifi, look at the error path in iwl_pci_probe:

12947 mutex_lock(&priv->mutex);
12969 /* fetch uCode file from disk, copy to bus-master buffers */
12970 err = ipw_read_ucode(priv);
12971 if (err) {
12972   IPW_ERROR("Could not read microcode from disk: %d\n", err);
12973   goto out_remove_sysfs;
12974 }

and note that in the error path it doesn't unlock nor destroy the mutex.

(I'd have changed the summary but I can't)

Comment 4 John W. Linville 2007-04-05 18:26:13 UTC
Actually, the latest rawhide kernel has a fix for this issue -- please give 
that a try.

Also, this bug is triggered by the lack of iwlwifi firmware installed on your 
box.  So, after you update to the latest rawhide kernel and reboot to verify 
that this issue is fixed, then you will need to install the iwlwifi-firmware 
package and reload the iwlwifi module:

   yum install iwlwifi-firmware
   modprobe -r iwlwifi
   modprobe iwlwifi


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