bnxt_en: Zero pad firmware messages to 128 bytes.

For future compatibility, zero pad all messages that the driver sends
to the firmware to 128 bytes.  If these messages are extended in the
future with new byte enables, zero padding these messages now will
guarantee future compatibility.
Signed-off-by: Michael Chan <mchan@broadcom.com>
Signed-off-by: David S. Miller <davem@davemloft.net>

drivers/net/ethernet/broadcom/bnxt/bnxt.c

@@ -2614,6 +2614,9 @@ int _hwrm_send_message(struct bnxt *bp, void *msg, u32 msg_len, int timeout)
 	/* Write request msg to hwrm channel */
 	__iowrite32_copy(bp->bar0, data, msg_len / 4);
 
+	for (i = msg_len; i < HWRM_MAX_REQ_LEN; i += 4)
+		writel(0, bp->bar0 + i);
+
 	/* currently supports only one outstanding message */
 	if (intr_process)
 		bp->hwrm_intr_seq_id = le32_to_cpu(req->target_id_seq_id) &