if (req->wlen > (BUF_LEN - REQ_HDR_LEN - CHECKSUM_LEN) ||
                        req->rlen > (BUF_LEN - ACK_HDR_LEN - CHECKSUM_LEN)) {
                dev_err(&d->udev->dev, "%s: too much data wlen=%d rlen=%d\n",
-                               __func__, req->wlen, req->rlen);
+                               KBUILD_MODNAME, req->wlen, req->rlen);
                ret = -EINVAL;
                goto exit;
        }
 
        dev_info(&d->udev->dev,
                        "%s: prechip_version=%02x chip_version=%02x chip_type=%04x\n",
-                       __func__, state->prechip_version, state->chip_version,
-                       state->chip_type);
+                       KBUILD_MODNAME, state->prechip_version,
+                       state->chip_version, state->chip_type);
 
        if (state->chip_type == 0x9135) {
                if (state->chip_version == 0x02)