diff options
| author | Johan Hedberg <johan.hedberg@intel.com> | 2013-12-05 09:43:34 +0200 |
|---|---|---|
| committer | Marcel Holtmann <marcel@holtmann.org> | 2013-12-05 07:05:34 -0800 |
| commit | b1c325c23d75c5e27607fdcc89bc9bf80af0ba9b (patch) | |
| tree | 22a372709ad13b3d059ed3770df375b56bd5f86f | |
| parent | 1f435424ce2c93c31c3887ec67e3afb6056f18f6 (diff) | |
Bluetooth: Implement returning of LE L2CAP credits
We should return credits to the remote side whenever they fall below a
certain level (in our case under half of the initially given amount).
Signed-off-by: Johan Hedberg <johan.hedberg@intel.com>
Signed-off-by: Marcel Holtmann <marcel@holtmann.org>
| -rw-r--r-- | net/bluetooth/l2cap_core.c | 26 |
1 files changed, 26 insertions, 0 deletions
diff --git a/net/bluetooth/l2cap_core.c b/net/bluetooth/l2cap_core.c index fe55162947f8..4e0e2bedd457 100644 --- a/net/bluetooth/l2cap_core.c +++ b/net/bluetooth/l2cap_core.c @@ -6610,6 +6610,32 @@ drop: return 0; } +static void l2cap_chan_le_send_credits(struct l2cap_chan *chan) +{ + struct l2cap_conn *conn = chan->conn; + struct l2cap_le_credits pkt; + u16 return_credits; + + /* We return more credits to the sender only after the amount of + * credits falls below half of the initial amount. + */ + if (chan->rx_credits >= (L2CAP_LE_MAX_CREDITS + 1) / 2) + return; + + return_credits = L2CAP_LE_MAX_CREDITS - chan->rx_credits; + + BT_DBG("chan %p returning %u credits to sender", chan, return_credits); + + chan->rx_credits += return_credits; + + pkt.cid = cpu_to_le16(chan->scid); + pkt.credits = cpu_to_le16(return_credits); + + chan->ident = l2cap_get_ident(conn); + + l2cap_send_cmd(conn, chan->ident, L2CAP_LE_CREDITS, sizeof(pkt), &pkt); +} + static void l2cap_data_channel(struct l2cap_conn *conn, u16 cid, struct sk_buff *skb) { |