Bluetooth: Host: Free ISO TX context

When disconnected while sending data, if ISO doesn't get the number of
completed packets it will not call `process_unack_tx` and thus will leak
TX context.

Fix that by setting the connection state in ISO disconnection which will
trigger a call to `process_unack_tx`.

Signed-off-by: Théo Battrel <[email protected]>

Author: theob-pro

subsys/bluetooth/host/iso.c

@@ -431,6 +431,7 @@ static void bt_iso_chan_disconnected(struct bt_iso_chan *chan, uint8_t reason)
 	__ASSERT(chan->iso != NULL, "NULL conn for iso chan %p", chan);
 
 	bt_iso_chan_set_state(chan, BT_ISO_STATE_DISCONNECTED);
+	bt_conn_set_state(chan->iso, BT_CONN_DISCONNECT_COMPLETE);
 
 	/* The peripheral does not have the concept of a CIG, so once a CIS
 	 * disconnects it is completely freed by unref'ing it