s390/qeth: limit trace to valid data of command request

'len' specifies how much data we send to the HW, don't dump beyond this
boundary.
As of today this is no big concern - commands are built in full, zeroed
pages.

Signed-off-by: Julian Wiedmann <jwi@linux.ibm.com>
Signed-off-by: David S. Miller <davem@davemloft.net>

diff --git a/drivers/s390/net/qeth_core_main.c b/drivers/s390/net/qeth_core_main.c
index 428175e1cb5dfd64a8a2a31d75bdbaf7565445fc..ae2ea0a0edce250fbe480765521fe525b6dc90c7 100644 (file)
--- a/drivers/s390/net/qeth_core_main.c
+++ b/drivers/s390/net/qeth_core_main.c
@@ -1991,7 +1991,7 @@ void qeth_prepare_control_data(struct qeth_card *card, int len,
        card->seqno.pdu_hdr++;
        memcpy(QETH_PDU_HEADER_ACK_SEQ_NO(iob->data),
               &card->seqno.pdu_hdr_ack, QETH_SEQ_NO_LENGTH);
-       QETH_DBF_HEX(CTRL, 2, iob->data, QETH_DBF_CTRL_LEN);
+       QETH_DBF_HEX(CTRL, 2, iob->data, min(len, QETH_DBF_CTRL_LEN));
 }
 EXPORT_SYMBOL_GPL(qeth_prepare_control_data);