Re: [PATCH 10/19] Bluetooth: Add logical link confirm

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Hi Andrei -

On Tue, 16 Oct 2012, Andrei Emeltchenko wrote:

Hi Mat,

On Mon, Oct 15, 2012 at 08:33:59AM -0700, Mat Martineau wrote:
The logical link confirm callback is executed when the AMP controller
completes its logical link setup.  During a channel move, a newly
formed logical link allows a move responder to send a move channel
response.  A move initiator will send a move channel confirm.  A
failed logical link will end the channel move and send an appropriate
response or confirm command indicating a failure.

If the channel is being created on an AMP controller, L2CAP
configuration is started after the logical link is set up.

Signed-off-by: Mat Martineau <mathewm@xxxxxxxxxxxxxx>
---
 net/bluetooth/l2cap_core.c | 117 ++++++++++++++++++++++++++++++++++++++++++++-
 1 file changed, 115 insertions(+), 2 deletions(-)

diff --git a/net/bluetooth/l2cap_core.c b/net/bluetooth/l2cap_core.c
index c687cc1..7e31e98 100644
--- a/net/bluetooth/l2cap_core.c
+++ b/net/bluetooth/l2cap_core.c
@@ -3779,6 +3779,7 @@ static inline int l2cap_config_req(struct l2cap_conn *conn,
 		goto unlock;
 	}

+	chan->ident = cmd->ident;
 	l2cap_send_cmd(conn, cmd->ident, L2CAP_CONF_RSP, len, rsp);
 	chan->num_conf_rsp++;

@@ -4221,11 +4222,123 @@ static void l2cap_send_move_chan_cfm_rsp(struct l2cap_conn *conn, u8 ident,
 	l2cap_send_cmd(conn, ident, L2CAP_MOVE_CHAN_CFM_RSP, sizeof(rsp), &rsp);
 }

+/* Call with chan locked */
 static void l2cap_logical_cfm(struct l2cap_chan *chan, struct hci_chan *hchan,
 			      u8 status)
 {
-	/* Placeholder */
-	return;
+	BT_DBG("chan %p, hchan %p, status %d", chan, hchan, status);
+
+	if (chan->state != BT_CONNECTED && !chan->local_amp_id)
+		return;
+
+	if (!status && chan->state != BT_CONNECTED) {
+		struct l2cap_conf_rsp rsp;
+		u8 code;
+
+		/* Create channel complete */
+		chan->hs_hcon = hchan->conn;
+		chan->hs_hcon->l2cap_data = chan->conn;
+
+		code = l2cap_build_conf_rsp(chan, &rsp,
+					    L2CAP_CONF_SUCCESS, 0);
+		l2cap_send_cmd(chan->conn, chan->ident, L2CAP_CONF_RSP, code,
+			       &rsp);
+		set_bit(CONF_OUTPUT_DONE, &chan->conf_state);
+
+		if (test_bit(CONF_INPUT_DONE, &chan->conf_state)) {
+			int err = 0;
+
+			set_default_fcs(chan);
+
+			if (chan->mode == L2CAP_MODE_ERTM ||
+			    chan->mode == L2CAP_MODE_STREAMING)

Shall we check for this? Can we have here basic mode?

It would make sense to enforce this earlier in the configuration process for AMP channels.

--
Mat Martineau

Employee of Qualcomm Innovation Center, Inc.
Qualcomm Innovation Center, Inc. is a member of Code Aurora Forum, hosted by The Linux Foundation
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