linux-kernel - Re: [4.1.0-07254-gc13c810] Regression: Bluetooth not working.

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Date:	Sun, 28 Jun 2015 17:36:04 +0200
From:	Jörg Otte <jrg.otte@...il.com>
To:	Marcel Holtmann <marcel@...tmann.org>
Cc:	Alexey Dobriyan <adobriyan@...il.com>,
	Johan Hedberg <johan.hedberg@...il.com>,
	"bluez mailin list (linux-bluetooth@...r.kernel.org)" 
	<linux-bluetooth@...r.kernel.org>,
	inux Kernel Mailing List <linux-kernel@...r.kernel.org>,
	Linus Torvalds <torvalds@...ux-foundation.org>
Subject: Re: [4.1.0-07254-gc13c810] Regression: Bluetooth not working.

2015-06-26 16:28 GMT+02:00 Jörg Otte <jrg.otte@...il.com>:
> 2015-06-26 12:03 GMT+02:00 Jörg Otte <jrg.otte@...il.com>:
>> 2015-06-26 11:37 GMT+02:00 Marcel Holtmann <marcel@...tmann.org>:
>>> Hi Joerg,
>>>
>>>> Bluetooth is inoperable in current Linus tree and the
>>>> first bad commit is:
>>>>
>>>> 835a6a2f8603237a3e6cded5a6765090ecb06ea5 is the first bad commit
>>>> commit 835a6a2f8603237a3e6cded5a6765090ecb06ea5
>>>> Author: Alexey Dobriyan <adobriyan@...il.com>
>>>> Date:   Wed Jun 10 20:28:33 2015 +0300
>>>>
>>>>    Bluetooth: Stop sabotaging list poisoning
>>>>
>>>>    list_del() poisons pointers with special values, no need to overwrite them.
>>>>
>>>>    Signed-off-by: Alexey Dobriyan <adobriyan@...il.com>
>>>>    Signed-off-by: Marcel Holtmann <marcel@...tmann.org>
>>>>
>>>> My BT adapter is an intel 8087:07da
>>>> I reverted that commit and this fixed the problem for me.
>>>
>>> today we had a patch from Tedd fixing the list initialization in the HIDP code.
>>>
>>> diff --git a/net/bluetooth/hidp/core.c b/net/bluetooth/hidp/core.c
>>> index 9070dfd6b4ad..f1a117f8cad2 100644
>>> --- a/net/bluetooth/hidp/core.c
>>> +++ b/net/bluetooth/hidp/core.c
>>> @@ -915,6 +915,7 @@ static int hidp_session_new(struct hidp_session **out, const bdaddr_t *bdaddr,
>>>         session->conn = l2cap_conn_get(conn);
>>>         session->user.probe = hidp_session_probe;
>>>         session->user.remove = hidp_session_remove;
>>> +       INIT_LIST_HEAD(&session->user.list);
>>>         session->ctrl_sock = ctrl_sock;
>>>         session->intr_sock = intr_sock;
>>>         skb_queue_head_init(&session->ctrl_transmit);
>>>
>>> Could this be fixing it for you as well?
>>>
>> I will check this when I am at home in the
>> afternoon.
>>
>
> The patch works for me too.
>
Ok, this was a little bit hasty!
I now see the following additional problems:

- System freeze on resume (occures always).
- System freeze on shutdown (occures sometimes)
- System freeze when BT-mouse is connecting (occures sometimes).

Then I can't do anything except power off.

This happens only if Bluetooth AND BT-mouse is activated.

Thanks, Jörg
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