Kernel panic when SCO connection

Hi,
When I try to connect SCO socket, Kernel getting crash.
Linux kernel - 2.6.22
Bluez - 4.58

error message,
__tx_submit:hci0 tx submit failed urb c0552c14 type 3 err -19

sometimes in connection is showing error while connection as below,
hci_acldata_packet:hci0 ACL packet data for unknown connection handler 2

It would be really appreciable if  somebody put some on light on this
issue, OR suggest me any patch or documentation.

-- 
With Regards,
Nirav Rabara