From 069cb27017de6476d47a70fbf144f69200d3e854 Mon Sep 17 00:00:00 2001 From: Lukasz Rymanowski Date: Wed, 13 Aug 2014 16:01:41 +0200 Subject: [PATCH] Bluetooth: Improve data packing in SAR mode There is no need to decrease pdu size with L2CAP SDU lenght in Start L2CAP SDU frame. Start packtet is just 2 bytes longer as specified and we can keep payload as long as possible. When testing SAR L2CAP against PTS, L2CAP channel is usually configured in that way, that SDU = MPS * 3. PTS expets then 3 I-Frames from IUT: Start, Continuation and End frame. Without this fix, we sent 4 I-Frames. We could pass a test by using -b option in l2test and send just two bytes less than SDU length. With this patch no need to use -b option. Signed-off-by: Lukasz Rymanowski Signed-off-by: Marcel Holtmann --- net/bluetooth/l2cap_core.c | 5 +---- 1 file changed, 1 insertion(+), 4 deletions(-) diff --git a/net/bluetooth/l2cap_core.c b/net/bluetooth/l2cap_core.c index 0cd7ed99558b..ebe7454362f0 100644 --- a/net/bluetooth/l2cap_core.c +++ b/net/bluetooth/l2cap_core.c @@ -2275,7 +2275,6 @@ static int l2cap_segment_sdu(struct l2cap_chan *chan, } else { sar = L2CAP_SAR_START; sdu_len = len; - pdu_len -= L2CAP_SDULEN_SIZE; } while (len > 0) { @@ -2290,10 +2289,8 @@ static int l2cap_segment_sdu(struct l2cap_chan *chan, __skb_queue_tail(seg_queue, skb); len -= pdu_len; - if (sdu_len) { + if (sdu_len) sdu_len = 0; - pdu_len += L2CAP_SDULEN_SIZE; - } if (len <= pdu_len) { sar = L2CAP_SAR_END;