Bluetooth: Get a more accurate L2CAP PDU len (35d401df) · Commits · 戴 / test

Both FCS and Extended header might be or might not be present in a ERTM channel. Signed-off-by:

net/bluetooth/l2cap_core.c

+7 −1

Original line number	Diff line number	Diff line
		@@ -2130,7 +2130,13 @@ static int l2cap_segment_sdu(struct l2cap_chan *chan,
		pdu_len = min_t(size_t, pdu_len, L2CAP_BREDR_MAX_PAYLOAD);

		/* Adjust for largest possible L2CAP overhead. */
		pdu_len -= L2CAP_EXT_HDR_SIZE + L2CAP_FCS_SIZE;
		if (chan->fcs)
		pdu_len -= L2CAP_FCS_SIZE;

		if (test_bit(FLAG_EXT_CTRL, &chan->flags))
		pdu_len -= L2CAP_EXT_HDR_SIZE;
		else
		pdu_len -= L2CAP_ENH_HDR_SIZE;

		/* Remote device may have requested smaller PDUs */
		pdu_len = min_t(size_t, pdu_len, chan->remote_mps);