OpenE2K
/
linux
6
0
Fork 0
Code Issues Pull Requests Releases Wiki Activity

Bluetooth: Fix incorrect LE CoC PDU length restriction based on HCI MTU 

commit 72c6fb915f upstream.

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>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
This commit is contained in:
Johan Hedberg 2014-08-15 21:06:51 +03:00 committed by Greg Kroah-Hartman
parent 93d192a930
commit 30861ec2cc
1 changed files with 1 additions and 5 deletions
Show Stats Download Patch File Download Diff File Expand all files Collapse all files

6
net/bluetooth/l2cap_core.c
View File

@ -2608,12 +2608,8 @@ 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)