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author | Gustavo F. Padovan <padovan@profusion.mobi> | 2010-06-18 20:37:33 -0300 |
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committer | Marcel Holtmann <marcel@holtmann.org> | 2010-07-21 10:39:05 -0700 |
commit | 95ffa97827371ede501615d9bd048eb5b49e8fe1 (patch) | |
tree | 0d20d43037c0430906673f9c36981eba4294c6b5 | |
parent | c13ffa620f15cb28d18268a773464cf51550fa9f (diff) | |
download | kernel_samsung_smdk4412-95ffa97827371ede501615d9bd048eb5b49e8fe1.zip kernel_samsung_smdk4412-95ffa97827371ede501615d9bd048eb5b49e8fe1.tar.gz kernel_samsung_smdk4412-95ffa97827371ede501615d9bd048eb5b49e8fe1.tar.bz2 |
Bluetooth: Fix L2CAP control bit field corruption
When resending an I-frame, ERTM was reusing the control bits from the last
time it was sent, that was causing a corruption in the new control field
due to it dirty fields.
This patches extracts only the SAR bits from the old field and reuse it to
resend the packet, the others bits should be reset and receive the
updated value.
Signed-off-by: Gustavo F. Padovan <padovan@profusion.mobi>
Signed-off-by: Marcel Holtmann <marcel@holtmann.org>
-rw-r--r-- | net/bluetooth/l2cap.c | 4 |
1 files changed, 4 insertions, 0 deletions
diff --git a/net/bluetooth/l2cap.c b/net/bluetooth/l2cap.c index 4415eb4..c2fb26d 100644 --- a/net/bluetooth/l2cap.c +++ b/net/bluetooth/l2cap.c @@ -1430,6 +1430,8 @@ static void l2cap_retransmit_one_frame(struct sock *sk, u8 tx_seq) tx_skb = skb_clone(skb, GFP_ATOMIC); bt_cb(skb)->retries++; control = get_unaligned_le16(tx_skb->data + L2CAP_HDR_SIZE); + control &= L2CAP_CTRL_SAR; + control |= (pi->buffer_seq << L2CAP_CTRL_REQSEQ_SHIFT) | (tx_seq << L2CAP_CTRL_TXSEQ_SHIFT); put_unaligned_le16(control, tx_skb->data + L2CAP_HDR_SIZE); @@ -1465,6 +1467,8 @@ static int l2cap_ertm_send(struct sock *sk) bt_cb(skb)->retries++; control = get_unaligned_le16(tx_skb->data + L2CAP_HDR_SIZE); + control &= L2CAP_CTRL_SAR; + if (pi->conn_state & L2CAP_CONN_SEND_FBIT) { control |= L2CAP_CTRL_FINAL; pi->conn_state &= ~L2CAP_CONN_SEND_FBIT; |