Bug 234713

Summary: iwlwifi lockdep report (failure to load firmware)
Product: [Fedora] Fedora Reporter: Bernd Bartmann <bernd.bartmann>
Component: kernelAssignee: John W. Linville <linville>
Status: CLOSED RAWHIDE QA Contact: Brian Brock <bbrock>
Severity: medium Docs Contact:
Priority: medium    
Version: rawhide   
Target Milestone: ---   
Target Release: ---   
Hardware: x86_64   
OS: Linux   
Whiteboard:
Fixed In Version: Doc Type: Bug Fix
Doc Text:
Story Points: ---
Clone Of: Environment:
Last Closed: 2007-04-05 18:26:13 UTC Type: ---
Regression: --- Mount Type: ---
Documentation: --- CRM:
Verified Versions: Category: ---
oVirt Team: --- RHEL 7.3 requirements from Atomic Host:
Cloudforms Team: --- Target Upstream Version:
Embargoed:
Bug Depends On:    
Bug Blocks: 202141    
Attachments:
Description Flags
output with dmesh with kernel calltrace
none
output of lspci -v none

Description Bernd Bartmann 2007-03-31 18:32:17 UTC 
From Bugzilla Helper:
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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):
kernel-2.6.20-1.3017.fc7.x86_64

How reproducible:
Sometimes


Steps to Reproduce:
1. try FC7T3 on a DELL D620
2.
3.

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

Hth!