if (data[0] != (unsigned char)0xff && data[0] != 0x00)
                        dev_warn(dev, "Weird byte 0x%02x\n", data[0]);
        } else if (len == 4)
-               dev_warn(dev, "Weird key %02x %02x %02x %02x\n",
-                    data[0], data[1], data[2], data[3]);
+               dev_warn(dev, "Weird key %*ph\n", 4, data);
        else
-               dev_warn(dev,
-                       "Weird data, len=%d %02x %02x %02x %02x %02x %02x ...\n",
-                       len, data[0], data[1], data[2], data[3], data[4],
-                       data[5]);
+               dev_warn(dev, "Weird data, len=%d %*ph ...\n", len, 6, data);
 }
 
 /*
 
        if (data[1] != ((data[2] + data[3] + 0xd5) & 0xff)) {
                dbginfo(&ati_remote->interface->dev,
-                       "wrong checksum in input: %02x %02x %02x %02x\n",
-                       data[0], data[1], data[2], data[3]);
+                       "wrong checksum in input: %*ph\n", 4, data);
                return;
        }