summaryrefslogtreecommitdiff
path: root/net
diff options
context:
space:
mode:
authorLuiz Augusto von Dentz <luiz.von.dentz@intel.com>2019-03-14 15:43:37 +0200
committerGreg Kroah-Hartman <gregkh@linuxfoundation.org>2019-05-10 18:36:13 +0200
commit41d5f23ef17b8bc4ffc107c0c850a095311b88dd (patch)
tree20c9a40c5eeeac312fb654537d09d1ca6765635e /net
parent2c93762f4b38d894158bdf73a783685d39d6a981 (diff)
Bluetooth: Fix not initializing L2CAP tx_credits
commit ba8f5289f706aed94cc95b15cc5b89e22062f61f upstream. l2cap_le_flowctl_init was reseting the tx_credits which works only for outgoing connection since that set the tx_credits on the response, for incoming connections that was not the case which leaves the channel without any credits causing it to be suspended. Signed-off-by: Luiz Augusto von Dentz <luiz.von.dentz@intel.com> Signed-off-by: Marcel Holtmann <marcel@holtmann.org> Cc: stable@vger.kernel.org # 4.20+ Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
Diffstat (limited to 'net')
-rw-r--r--net/bluetooth/l2cap_core.c9
1 files changed, 4 insertions, 5 deletions
diff --git a/net/bluetooth/l2cap_core.c b/net/bluetooth/l2cap_core.c
index ccdc5c67d22a..a3b2e3b5f04b 100644
--- a/net/bluetooth/l2cap_core.c
+++ b/net/bluetooth/l2cap_core.c
@@ -510,12 +510,12 @@ void l2cap_chan_set_defaults(struct l2cap_chan *chan)
}
EXPORT_SYMBOL_GPL(l2cap_chan_set_defaults);
-static void l2cap_le_flowctl_init(struct l2cap_chan *chan)
+static void l2cap_le_flowctl_init(struct l2cap_chan *chan, u16 tx_credits)
{
chan->sdu = NULL;
chan->sdu_last_frag = NULL;
chan->sdu_len = 0;
- chan->tx_credits = 0;
+ chan->tx_credits = tx_credits;
/* Derive MPS from connection MTU to stop HCI fragmentation */
chan->mps = min_t(u16, chan->imtu, chan->conn->mtu - L2CAP_HDR_SIZE);
/* Give enough credits for a full packet */
@@ -1281,7 +1281,7 @@ static void l2cap_le_connect(struct l2cap_chan *chan)
if (test_and_set_bit(FLAG_LE_CONN_REQ_SENT, &chan->flags))
return;
- l2cap_le_flowctl_init(chan);
+ l2cap_le_flowctl_init(chan, 0);
req.psm = chan->psm;
req.scid = cpu_to_le16(chan->scid);
@@ -5531,11 +5531,10 @@ static int l2cap_le_connect_req(struct l2cap_conn *conn,
chan->dcid = scid;
chan->omtu = mtu;
chan->remote_mps = mps;
- chan->tx_credits = __le16_to_cpu(req->credits);
__l2cap_chan_add(conn, chan);
- l2cap_le_flowctl_init(chan);
+ l2cap_le_flowctl_init(chan, __le16_to_cpu(req->credits));
dcid = chan->scid;
credits = chan->rx_credits;