hex_str
hex_str(serno, atag->u.serialnr.high);
hex_str(serno+8, atag->u.serialnr.low);
char hex_str[128] = {0};
char *hex_str_ptr = &hex_str[0];
uint32_t hex_str_remaining = sizeof(hex_str);
hex_str,
unsigned char hex_str[16 * 3];
hex_str, sizeof(hex_str), false);
netdev_dbg(dev, "%s\n", hex_str);
static const char hex_str[] = "0123456789abcdef";
hex_str[vpd->device_identifier_type];
hex_str[(page_83[i] & 0xf0) >> 4];
hex_str[page_83[i] & 0x0f];