* Gustavo F. Padovan <padovan@xxxxxxxxxxxxxx> [2011-04-15 16:22:58 -0300]:
> Hi Luiz,
>
> * Luiz Augusto von Dentz <luiz.dentz@xxxxxxxxx> [2011-04-12 14:36:01 +0300]:
>
> > Apparently this is a regression caused by commit
> > 769be974d0c7b4fe1a52f9cdaad22259b60953f7 - [Bluetooth] Use ACL config
> > stage to retrieve remote features, when receiving pincode request in a
> > new connection the state will be BT_CONFIG so HCI_PAIRING_TIMEOUT is
> > never set to the connection, this could be reproduced by removing a
> > link key in the remote side and trying to connect:
> >
> > 2011-04-05 12:11:37.070953 < HCI Command: Authentication Requested
> > (0x01|0x0011) plen 2
> > handle 1
> > 2011-04-05 12:11:37.071686 > HCI Event: Command Status (0x0f) plen 4
> > Authentication Requested (0x01|0x0011) status 0x00 ncmd 1
> > 2011-04-05 12:11:37.071838 > HCI Event: Link Key Request (0x17) plen 6
> > bdaddr 00:1F:E1:EB:B9:CB
> > 2011-04-05 12:11:37.075073 < HCI Command: Link Key Request Reply
> > (0x01|0x000b) plen 22
> > bdaddr 00:1F:E1:EB:B9:CB key 92BA9EAD06542B0600457C609B8F5395
> > 2011-04-05 12:11:37.075775 > HCI Event: Command Complete (0x0e) plen 10
> > Link Key Request Reply (0x01|0x000b) ncmd 1
> > status 0x00 bdaddr 00:1F:E1:EB:B9:CB
> > 2011-04-05 12:11:37.087005 > HCI Event: PIN Code Request (0x16) plen 6
> > bdaddr 00:1F:E1:EB:B9:CB
> > 2011-04-05 12:11:39.038849 < ACL data: handle 1 flags 0x00 dlen 12
> > L2CAP(s): Disconn req: dcid 0x00a9 scid 0x0040
> > 2011-04-05 12:11:39.100647 > HCI Event: Number of Completed Packets
> > (0x13) plen 5
> > handle 1 packets 1
> > 2011-04-05 12:11:39.100830 > ACL data: handle 1 flags 0x02 dlen 12
> > L2CAP(s): Disconn rsp: dcid 0x00a9 scid 0x0040
> > 2011-04-05 12:11:40.433624 > HCI Event: Auth Complete (0x06) plen 3
> > status 0x13 handle 1
> > Error: Remote User Terminated Connection
> > 2011-04-05 12:11:40.437774 > HCI Event: Disconn Complete (0x05) plen 4
> > status 0x00 handle 1 reason 0x13
> > Reason: Remote User Terminated Connection
> >
> > I think the following patch might fix it:
> >
> > diff --git a/net/bluetooth/hci_event.c b/net/bluetooth/hci_event.c
> > index 3fbfa50..abdc4de 100644
> > --- a/net/bluetooth/hci_event.c
> > +++ b/net/bluetooth/hci_event.c
> > @@ -1973,10 +1973,14 @@ static inline void hci_pin_code_request_evt(struct
> > hci_dev *hdev, struct sk_buff
> > hci_dev_lock(hdev);
> >
> > conn = hci_conn_hash_lookup_ba(hdev, ACL_LINK, &ev->bdaddr);
> > - if (conn && conn->state == BT_CONNECTED) {
> > - hci_conn_hold(conn);
> > + if (conn) {
> > conn->disc_timeout = HCI_PAIRING_TIMEOUT;
> > - hci_conn_put(conn);
> > +
> > + /* Update disconnect timer */
> > + if (conn->state == BT_CONNECTED) {
> > + hci_conn_hold(conn);
> > + hci_conn_put(conn);
>
> I think these two line can be:
>
> mod_timer(&conn->disc_timer, jiffies + HCI_PAIRING_TIMEOUT);
>
>
> The two main difference are that here we don't delete the idle_timer, but it
> isn't used anywhere, so I think we can delete it.
My mistake, idle_timer is actually used, I forgot to look hci_conn.c
> Also we don't double the
> timeout value when !conn->out
>
> from hci_conn_put():
>
> timeo = msecs_to_jiffies(conn->disc_timeout);
> if (!conn->out)
> timeo *= 2;
>
> I still don't know why we double it.
>
> --
> Gustavo F. Padovan
> http://profusion.mobi
--
Gustavo F. Padovan
http://profusion.mobi
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