Config that boots, but fails with:

[  164.417510] tty ttyO1: Nokia H4+ protocol initialized with
4806c000.serial:bluetooth!
[  164.437011] tty ttyO1: Nokia H4+ protocol setup...
[  164.506805] tty ttyO1: wait for cts... received!
[  164.506835] tty ttyO1: Sending negotiation...
[  164.506866] hu cd593380 skb ceb759c0
[  164.509521] tty ttyO1: wakeup received: 0 -> 1
[  174.566772] tty ttyO1: Negotiation failed: -110
[  174.566802] hu cd593380
[  174.566833] hu cd593380
[  174.567138] tty ttyO1: Nokia H4+ protocol setup...
[  174.592651] tty ttyO1: wakeup received: 1 -> 0
[  174.625274] Bluetooth: hci0: Frame reassembly failed (-84)
[  174.636749] tty ttyO1: wait for cts... received!
[  174.636871] tty ttyO1: wakeup received: 0 -> 1
[  174.636932] tty ttyO1: Sending negotiation...
[  174.636962] hu cd593380 skb cc37c540
[  184.806701] tty ttyO1: Negotiation failed: -110
[  184.806762] hu cd593380
pavel@n900:/my/modules$
1 file changed