Bug 33792

Summary: lockdep trace when unplugging usb audio (.39rc4)
Product: Drivers Reporter: Maciej Rutecki (maciej.rutecki)
Component: Sound(ALSA)Assignee: Jaroslav Kysela (perex)
Status: RESOLVED CODE_FIX    
Severity: normal CC: james, maciej.rutecki, rjw, tiwai
Priority: P1    
Hardware: All   
OS: Linux   
Kernel Version: 2.6.39-rc4 Tree: Mainline
Regression: Yes
Bug Depends on:    
Bug Blocks: 27352    

Description Maciej Rutecki 2011-04-21 17:30:43 UTC
Subject    : lockdep trace when unplugging usb audio (.39rc4)
Submitter  : Dave Jones <davej@redhat.com>
Date       : 2011-04-19 18:07
Message-ID : 20110419180745.GA438@redhat.com
References : http://marc.info/?l=linux-kernel&m=130323648920431&w=2

This entry is being used for tracking a regression from 2.6.38. Please don't
close it until the problem is fixed in the mainline.
Comment 1 James Hogan 2011-05-12 21:46:36 UTC
I see this when suspending my laptop in 2.6.39-rc7. I've seen these warnings since 2.6.39-rc2 (didn't try rc1), although I can't remember if exactly the same warning. Don't see any warnings in 2.6.38.

Is it worth me spending the time to try and bisect it, or is the problem obvious from the log?
Comment 2 James Hogan 2011-05-15 07:04:06 UTC
I just saw this exact same circular locking warning on v2.6.38
Comment 3 Rafael J. Wysocki 2011-05-15 09:16:25 UTC
OK, suppose it's a post-2.6.37 regression.
Comment 4 Takashi Iwai 2013-11-13 17:31:36 UTC
The race must have been already fixed in the upstream.