make bridge with BT pan and ethernet

[neofresa]

I am using SAMA5d2xplaned board with bt chip to test a demo with bt pan
bt stack is cypress bsa_server
now, I am trying to have a BT pan network with bridge eth0 but always failed,
is any reference for this? thank you.

here my settings on sama5d2:

with BT PAN NAP:
Setup bridge:
# brctl addbr pan0
# ifconfig pan0 192.168.0.1
# brctl setfd pan0 0
# brctl stp pan0 disable
# brctl addif pan0 eth0

start BT server
then
brctl addif pan0 tap0
ifconfig tap0 0.0.0.0

then eth0 will down, and ssh to board is not available,
any comment are welcome , thank you