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Subject2.6.21-rc3 snd-usb-audio lockdep report.
=============================================
[ 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


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