1. Read from hardware in initialize() function
2. Read from environment in net/eth.c after initialize()
-3. Give priority to the value in the environment if a conflict
-4. Program hardware in the device's init() function.
-
-If somebody wants to subvert the design philosophy, this can be done
-in the board-specific board_eth_init() function by calling eth_init()
-after all the NICs have been registered.
+3. The environment variable will be compared to the driver initialized
+ struct eth_device->enetaddr. If they differ, a warning is printed, and the
+ environment variable will be used unchanged.
+ If the environment variable is not set, it will be initialized from
+ eth_device->enetaddr, and a warning will be printed.
+4. Program the address into hardware if the following conditions are met:
+ a) The relevant driver has a 'write_addr' function
+ b) The user hasn't set an 'ethmacskip' environment variable
+ c) The address is valid (unicast, not all-zeros)
+
+Previous behavior had the MAC address always being programmed into hardware
+in the device's init() function.
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Usage