linux-kernel - Re: [BUG] Bluetooth broken post rc7

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Message-ID: <CABBYNZ+fxUWhi0uF0b_6Z8iqYd7Pp_4zPBRyM6Gyh3zJH1am5Q@mail.gmail.com>
Date:	Fri, 15 Jul 2011 13:11:04 +0300
From:	Luiz Augusto von Dentz <luiz.dentz@...il.com>
To:	Ed Tomlinson <edt@....ca>
Cc:	linux-kernel@...r.kernel.org, linux-bluetooth@...r.kernel.org,
	"Gustavo F. Padovan" <padovan@...fusion.mobi>,
	Ilia Kolomisnky <iliak@...com>,
	David Miller <davem@...emloft.net>
Subject: Re: [BUG] Bluetooth broken post rc7

Hi,

On Fri, Jul 15, 2011 at 6:18 AM, Ed Tomlinson <edt@....ca> wrote:
> Hi,
>
> I booted to todays linux git and bluetooth is no longer working.  My magic mouse will not connect correctly.
>
> Reverting:
>
> commit 9fa7e4f76f3658ba1f44fbdb95c77e7df3f53f95
> Author: Gustavo F. Padovan <padovan@...fusion.mobi>
> Date:   Thu Jun 30 16:11:30 2011 -0300
>
>    Bluetooth: Fix regression with incoming L2CAP connections
>
>    PTS test A2DP/SRC/SRC_SET/TC_SRC_SET_BV_02_I revealed that
>    ( probably after the df3c3931e commit ) the l2cap connection
>    could not be established in case when the "Auth Complete" HCI
>    event does not arive before the initiator send "Configuration
>    request", in which case l2cap replies with "Command rejected"
>    since the channel is still in BT_CONNECT2 state.
>
>    Based on patch from: Ilia Kolomisnky <iliak@...com>
>
>    Signed-off-by: Gustavo F. Padovan <padovan@...fusion.mobi>
>
> Fixes the bug here (things work like rc7).
>
> Do we really need 9fa7e4f76f3658ba1f44fbdb95c77e7df3f53f95 in 3.0?
>
> Thanks,
>
> Ed Tomlinson
> --

I've changed the check to something like this:

diff --git a/net/bluetooth/l2cap_core.c b/net/bluetooth/l2cap_core.c
index ebff14c..f88b9c8 100644
--- a/net/bluetooth/l2cap_core.c
+++ b/net/bluetooth/l2cap_core.c
@@ -2323,8 +2323,7 @@ static inline int l2cap_config_req(struct
l2cap_conn *conn, struct l2cap_cmd_hdr

        sk = chan->sk;

-       if ((bt_sk(sk)->defer_setup && sk->sk_state != BT_CONNECT2) ||
-                (!bt_sk(sk)->defer_setup && sk->sk_state != BT_CONFIG)) {
+       if ((sk->sk_state != BT_CONNECT2) && (sk->sk_state != BT_CONFIG)) {
                struct l2cap_cmd_rej rej;

                rej.reason = cpu_to_le16(0x0002);

Seems to work fine.

-- 
Luiz Augusto von Dentz
--
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