Caught this one while booting my laptop:

drivers/usb/core/usb.c: registered new driver hci_usb
Module bluetooth cannot be unloaded due to unsafe usage in include/linux/module.h:457
Debug: sleeping function called from illegal context at mm/slab.c:1723
Call Trace:
 [<c0119d92>] __might_sleep+0x5f/0x65
 [<c013a097>] kmalloc+0x88/0x8f
 [<c0238111>] usb_alloc_urb+0x21/0x51
 [<f09180bc>] hci_usb_enable_intr+0x20/0xf8 [hci_usb]
 [<f0918403>] hci_usb_open+0x4e/0x9a [hci_usb]
 [<f08f86a2>] hci_dev_open+0xde/0x320 [bluetooth]
 [<f08fd3cb>] hci_sock_ioctl+0x263/0x3c1 [bluetooth]
 [<c0254d8f>] sock_ioctl+0xf5/0x288
 [<c015e3a6>] sys_ioctl+0x11b/0x295
 [<c010ad8b>] syscall_call+0x7/0xb

.config is attached
 
mvh,
A