From: Dave Jones <davej@redhat.com>
To: Linux Kernel <linux-kernel@vger.kernel.org>
Cc: Takashi Iwai <tiwai@suse.de>
Subject: 2.6.21-rc3 snd-usb-audio lockdep report.
Date: Sat, 10 Mar 2007 00:31:33 -0500 [thread overview]
Message-ID: <20070310053133.GA6466@redhat.com> (raw)
=============================================
[ INFO: possible recursive locking detected ]
2.6.20-1.2962.fc7 #1
---------------------------------------------
rosegardenseque/5229 is trying to acquire lock:
(&grp->list_mutex){----}, at: [<ffffffff881d4352>] snd_seq_deliver_event+0x93/0x173 [snd_seq]
but task is already holding lock:
(&grp->list_mutex){----}, at: [<ffffffff881d4352>] snd_seq_deliver_event+0x93/0x173 [snd_seq]
other info that might help us debug this:
1 lock held by rosegardenseque/5229:
#0: (&grp->list_mutex){----}, at: [<ffffffff881d4352>] snd_seq_deliver_event+0x93/0x173 [snd_seq]
stack backtrace:
Call Trace:
[<ffffffff802a303b>] __lock_acquire+0x151/0xbc4
[<ffffffff802a3ea4>] lock_acquire+0x4c/0x65
[<ffffffff881d4352>] :snd_seq:snd_seq_deliver_event+0x93/0x173
[<ffffffff8029eab8>] down_read+0x3e/0x4a
[<ffffffff881d4352>] :snd_seq:snd_seq_deliver_event+0x93/0x173
[<ffffffff881d56c6>] :snd_seq:snd_seq_kernel_client_dispatch+0x54/0x68
[<ffffffff881fd05f>] :snd_seq_dummy:dummy_input+0x54/0x5a
[<ffffffff881d41cb>] :snd_seq:snd_seq_deliver_single_event+0xf8/0x1ec
[<ffffffff881d43a1>] :snd_seq:snd_seq_deliver_event+0xe2/0x173
[<ffffffff881d4819>] :snd_seq:snd_seq_dispatch_event+0xed/0x110
[<ffffffff881d6e0e>] :snd_seq:snd_seq_check_queue+0xbc/0x105
[<ffffffff881d70e3>] :snd_seq:snd_seq_enqueue_event+0xb6/0xca
[<ffffffff881d4501>] :snd_seq:snd_seq_client_enqueue_event+0xcf/0x101
[<ffffffff881d5db2>] :snd_seq:snd_seq_write+0x140/0x198
[<ffffffff8021634f>] vfs_write+0xcf/0x178
[<ffffffff80216d64>] sys_write+0x47/0x70
[<ffffffff8025c2b5>] tracesys+0xdc/0xe1
--
http://www.codemonkey.org.uk
next reply other threads:[~2007-03-10 5:31 UTC|newest]
Thread overview: 2+ messages / expand[flat|nested] mbox.gz Atom feed top
2007-03-10 5:31 Dave Jones [this message]
2007-03-12 11:14 ` 2.6.21-rc3 snd-usb-audio lockdep report Takashi Iwai
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