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| author | Lukasz Rymanowski <lukasz.rymanowski@tieto.com> | 2014-08-14 09:35:34 +0200 |
|---|---|---|
| committer | Marcel Holtmann <marcel@holtmann.org> | 2014-08-14 09:47:02 +0200 |
| commit | 13cac15296afe7e42088ecfcd0f1d4b658248c46 (patch) | |
| tree | 01fd55d3acafa9d6401b50d787fbebea1e951759 /net/bluetooth | |
| parent | Bluetooth: Improve data packing in SAR mode (diff) | |
| download | linux-13cac15296afe7e42088ecfcd0f1d4b658248c46.tar.xz linux-13cac15296afe7e42088ecfcd0f1d4b658248c46.zip | |
Bluetooth: Fix ERTM L2CAP resend packet
I-Frame which is going to be resend already has FCS field added and set
(if it was required). Adding additional FCS field calculated from data +
old FCS in resend function is incorrect. This patch fix that.
Issue has been found during PTS testing.
Signed-off-by: Lukasz Rymanowski <lukasz.rymanowski@tieto.com>
Signed-off-by: Marcel Holtmann <marcel@holtmann.org>
Diffstat (limited to 'net/bluetooth')
| -rw-r--r-- | net/bluetooth/l2cap_core.c | 8 |
1 files changed, 5 insertions, 3 deletions
diff --git a/net/bluetooth/l2cap_core.c b/net/bluetooth/l2cap_core.c index ebe7454362f0..4a90438d99df 100644 --- a/net/bluetooth/l2cap_core.c +++ b/net/bluetooth/l2cap_core.c @@ -1968,10 +1968,12 @@ static void l2cap_ertm_resend(struct l2cap_chan *chan) tx_skb->data + L2CAP_HDR_SIZE); } + /* Update FCS */ if (chan->fcs == L2CAP_FCS_CRC16) { - u16 fcs = crc16(0, (u8 *) tx_skb->data, tx_skb->len); - put_unaligned_le16(fcs, skb_put(tx_skb, - L2CAP_FCS_SIZE)); + u16 fcs = crc16(0, (u8 *) tx_skb->data, + tx_skb->len - L2CAP_FCS_SIZE); + put_unaligned_le16(fcs, skb_tail_pointer(tx_skb) - + L2CAP_FCS_SIZE); } l2cap_do_send(chan, tx_skb); |