struct device_attribute *attr,
char *buf)
{
- char *addr = dev_to_rdev(dev)->wiphy.perm_addr;
+ unsigned char *addr = dev_to_rdev(dev)->wiphy.perm_addr;
return sprintf(buf, "%.2x:%.2x:%.2x:%.2x:%.2x:%.2x\n",
addr[0], addr[1], addr[2], addr[3], addr[4], addr[5]);