From mboxrd@z Thu Jan 1 00:00:00 1970 From: Andrew Morton Subject: lockdep whine in 2.6.26-rc2-mm1 Date: Wed, 14 May 2008 00:09:33 -0700 Message-ID: <20080514000933.56adc131.akpm@linux-foundation.org> Mime-Version: 1.0 Content-Type: text/plain; charset=US-ASCII Content-Transfer-Encoding: 7bit Return-path: Received: from smtp1.linux-foundation.org ([140.211.169.13]:52355 "EHLO smtp1.linux-foundation.org" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S1751066AbYENHKK (ORCPT ); Wed, 14 May 2008 03:10:10 -0400 Sender: linux-scsi-owner@vger.kernel.org List-Id: linux-scsi@vger.kernel.org To: Greg KH , linux-scsi@vger.kernel.org, Kay Sievers ============================================= [ INFO: possible recursive locking detected ] 2.6.26-rc2-mm1 #15 --------------------------------------------- modprobe/942 is trying to acquire lock: (&cls->mutex){--..}, at: [] device_add+0x43d/0x57a but task is already holding lock: (&cls->mutex){--..}, at: [] class_interface_register+0x48/0xbd other info that might help us debug this: 1 lock held by modprobe/942: #0: (&cls->mutex){--..}, at: [] class_interface_register+0x48/0xbd stack backtrace: Pid: 942, comm: modprobe Not tainted 2.6.26-rc2-mm1 #15 Call Trace: [] __lock_acquire+0x90d/0xc50 [] ? restore_args+0x0/0x30 [] ? device_add+0x43d/0x57a [] lock_acquire+0x91/0xb7 [] ? device_add+0x43d/0x57a [] mutex_lock_nested+0xf2/0x278 [] ? device_add+0x43d/0x57a [] ? _spin_unlock+0x23/0x28 [] device_add+0x43d/0x57a [] device_register+0x16/0x1b [] device_create+0xdf/0x112 [] ? trace_hardirqs_on+0xd/0xf [] ? trace_hardirqs_on+0xd/0xf [] ? mutex_unlock+0x9/0xb [] ? kobj_map+0x113/0x124 [] ? exact_lock+0x0/0x14 [] ? exact_match+0x0/0x9 [] :sg:sg_add+0x2a3/0x3bd [] class_interface_register+0x77/0xbd [] :scsi_mod:scsi_register_interface+0x11/0x13 [] :sg:init_sg+0xa3/0x155 [] sys_init_module+0x1823/0x197a [] ? seq_release+0x0/0x56 [] system_call_after_swapgs+0x7b/0x80 Driver 'sr' needs updating - please use bus_type methods sd 0:0:0:0: Attached scsi generic sg0 type 0 sr0: scsi3-mmc drive: 24x/24x writer dvd-ram cd/rw xa/form2 cdda tray Uniform CD-ROM driver Revision: 3.20 sr 3:0:0:0: Attached scsi CD-ROM sr0 sr 3:0:0:0: Attached scsi generic sg1 type 5 Full dmesg: http://userweb.kernel.org/~akpm/dmesg-t61p.txt Config: http://userweb.kernel.org/~akpm/config-t61p.txt