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authorJohan Hedberg <johan.hedberg@intel.com>2014-08-15 21:06:51 +0300
committerMarcel Holtmann <marcel@holtmann.org>2014-09-08 19:07:52 +0200
commit72c6fb915ff2d30ae14053edee4f0d30019bad76 (patch)
tree78513272787c14712c47af74cfed3d6bfe1d32a5 /net/bluetooth/l2cap_core.c
parent61a3d4f9d52c00b2016bc27fc66b10a194043f76 (diff)
downloadlinux-72c6fb915ff2d30ae14053edee4f0d30019bad76.tar.bz2
Bluetooth: Fix incorrect LE CoC PDU length restriction based on HCI MTU
The l2cap_create_le_flowctl_pdu() function that l2cap_segment_le_sdu() calls is perfectly capable of doing packet fragmentation if given bigger PDUs than the HCI buffers allow. Forcing the PDU length based on the HCI MTU (conn->mtu) would therefore needlessly strict operation on hardware with limited LE buffers (e.g. both Intel and Broadcom seem to have this set to just 27 bytes). This patch removes the restriction and makes it possible to send PDUs of the full length that the remote MPS value allows. Signed-off-by: Johan Hedberg <johan.hedberg@intel.com> Signed-off-by: Marcel Holtmann <marcel@holtmann.org> Cc: stable@vger.kernel.org
Diffstat (limited to 'net/bluetooth/l2cap_core.c')
-rw-r--r--net/bluetooth/l2cap_core.c6
1 files changed, 1 insertions, 5 deletions
diff --git a/net/bluetooth/l2cap_core.c b/net/bluetooth/l2cap_core.c
index 4a90438d99df..52b56808d5d3 100644
--- a/net/bluetooth/l2cap_core.c
+++ b/net/bluetooth/l2cap_core.c
@@ -2358,12 +2358,8 @@ static int l2cap_segment_le_sdu(struct l2cap_chan *chan,
BT_DBG("chan %p, msg %p, len %zu", chan, msg, len);
- pdu_len = chan->conn->mtu - L2CAP_HDR_SIZE;
-
- pdu_len = min_t(size_t, pdu_len, chan->remote_mps);
-
sdu_len = len;
- pdu_len -= L2CAP_SDULEN_SIZE;
+ pdu_len = chan->remote_mps - L2CAP_SDULEN_SIZE;
while (len > 0) {
if (len <= pdu_len)