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

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Date:	Fri, 15 Jul 2011 07:28:03 -0400
From:	Ed Tomlinson <edt@....ca>
To:	Luiz Augusto von Dentz <luiz.dentz@...il.com>
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

On Friday 15 July 2011 06:11:04 Luiz Augusto von Dentz wrote:
> 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.

And here too.  You can can my tested by
 
Tested By: Ed Tomlinson <edt@....ca>

IMHO this should be in 3.0.0

Thanks!
Ed Tomlinson

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