Anrel, what kernel version are you using?
Previously it was happening with a Blackberry on 2.6.31-17. I was planning to dig into it, then I upgraded my ubuntu with (2.6.32-22) and the problem disappeared. I am guessing it might be a raising condition with certain phone during certain circumstance. I think Liejun Tao <liejuntao001@xxxxxxxxx> has investigate this one too.
Cheers,
Ed
----- Original Message ----
From: Andrei Emeltchenko <andrei.emeltchenko.news@xxxxxxxxx>
To: Marcel Holtmann <marcel@xxxxxxxxxxxx>
Cc: Ed Tsang <netdesign_98@xxxxxxxxx>; Bluettooth Linux <linux-bluetooth@xxxxxxxxxxxxxxx>
Sent: Wed, June 16, 2010 6:21:55 AM
Subject: Re: double Connect req: psm 1 scid 0x0040 ?
Hi,
On Wed, Feb 3, 2010 at 6:07 PM, Marcel Holtmann <marcel@xxxxxxxxxxxx> wrote:
>> >> In hcidump I seem to see a problem in #3. After the Encrypt Change there seem to be 2 >con. req. psm 1 scid 0x0040
>>
>> >what kernel version is this? I think we fixed that already.
>> It is a ubutunu distribution. 2.6.31-17-generic.
>
> can you test with a 2.6.33-rc6 vanilla kernel. I really thing this got
> fixed and you might see a side effect or bad patch here.
Marcel we are seeing "double L2CAP connect also" when connecting to
some smartphones using contran profile. What about following patch
proposal:
The idea is to use existing flag L2CAP_CONF_CONNECT_PEND to mark that
L2CAP request has been sent.
Currently it is durty hack, I will send modified patch later today.
diff --git a/net/bluetooth/l2cap.c b/net/bluetooth/l2cap.c
index fc81acb..27bff6e 100644
--- a/net/bluetooth/l2cap.c
+++ b/net/bluetooth/l2cap.c
@@ -394,6 +394,12 @@ static void l2cap_do_start(struct sock *sk)
l2cap_pi(sk)->ident = l2cap_get_ident(conn);
+ if (l2cap_pi(sk)->conf_state &
L2CAP_CONF_CONNECT_PEND) {
+ printk(KERN_ERR "\n!!! %s: Connection
pending !!!\n", __FUNCTION__);
+ return;
+ }
+
+ l2cap_pi(sk)->conf_state |= L2CAP_CONF_CONNECT_PEND;
l2cap_send_cmd(conn, l2cap_pi(sk)->ident,
L2CAP_CONN_REQ, sizeof(req), &req);
}
@@ -448,6 +454,13 @@ static void l2cap_conn_start(struct l2cap_conn *conn)
l2cap_pi(sk)->ident = l2cap_get_ident(conn);
+ if (l2cap_pi(sk)->conf_state &
L2CAP_CONF_CONNECT_PEND) {
+ printk(KERN_ERR "\n!!! %s:
Connection pending !!!\n", __FUNCTION__);
+ bh_unlock_sock(sk);
+ continue;
+ }
+
+ l2cap_pi(sk)->conf_state |=
L2CAP_CONF_CONNECT_PEND;
l2cap_send_cmd(conn, l2cap_pi(sk)->ident,
L2CAP_CONN_REQ, sizeof(req), &req);
}
@@ -3809,6 +3822,7 @@ static int l2cap_security_cfm(struct hci_conn
*hcon, u8 status, u8 encrypt)
bh_lock_sock(sk);
if (l2cap_pi(sk)->conf_state & L2CAP_CONF_CONNECT_PEND) {
+ printk(KERN_ERR "\n!!! %s: Connection pending
!!!\n", __FUNCTION__);
bh_unlock_sock(sk);
continue;
}
@@ -3828,6 +3842,7 @@ static int l2cap_security_cfm(struct hci_conn
*hcon, u8 status, u8 encrypt)
l2cap_pi(sk)->ident = l2cap_get_ident(conn);
+ l2cap_pi(sk)->conf_state |=
L2CAP_CONF_CONNECT_PEND;
l2cap_send_cmd(conn, l2cap_pi(sk)->ident,
L2CAP_CONN_REQ, sizeof(req), &req);
>
> Regards
>
> Marcel
>
>
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