I get this when suspending. The kernel is 2.6.22+recent git (just before -rc1).
usb 2-1: USB disconnect, address 3
BUG: sleeping function called from invalid context at
/home/jeremy/hg/xen/paravirt/linux/drivers/usb/core/urb.c:524
in_atomic():1, irqs_disabled():0
1 lock held by khubd/207:
#0: (&table_lock){--..}, at: [<f89fba38>] usb_serial_put+0x13/0x2c [usbserial]
[<c0109162>] show_trace_log_lvl+0x1a/0x2f
[<c0109bf8>] show_trace+0x12/0x14
[<c0109c10>] dump_stack+0x16/0x18
[<c01247b7>] __might_sleep+0xea/0xf1
[<c02cd7a2>] usb_kill_urb+0x1a/0xc7
[<f89e7203>] sierra_shutdown+0x5d/0x9c [sierra]
[<f89fbb5a>] destroy_serial+0x45/0x10a [usbserial]
[<c0219a2f>] kref_put+0x63/0x71
[<f89fba44>] usb_serial_put+0x1f/0x2c [usbserial]
[<f89fbf00>] usb_serial_disconnect+0x79/0xa6 [usbserial]
[<c02d06df>] usb_unbind_interface+0x47/0x98
[<c02925f2>] __device_release_driver+0x74/0x90
[<c02929e0>] device_release_driver+0x30/0x47
[<c0291f81>] bus_remove_device+0x73/0x82
[<c0290650>] device_del+0x208/0x27e
[<c02cdf2a>] usb_disable_device+0x5f/0xbc
[<c02ca497>] usb_disconnect+0x95/0x12f
[<c02caba8>] hub_thread+0x377/0xa57
[<c013cb7f>] kthread+0x3b/0x64
[<c0108d27>] kernel_thread_helper+0x7/0x10
=======================
sierra3 ttyUSB0: Sierra USB modem (3 port) converter now disconnected from
ttyUSB0
sierra3 ttyUSB1: Sierra USB modem (3 port) converter now disconnected from
ttyUSB1
sierra3 ttyUSB2: Sierra USB modem (3 port) converter now disconnected from
ttyUSB2
sierra 2-1:1.0: device disconnected
J
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