The r8152 kernel driver is expecting the AMAC() method to return a raw buffer, not a string. To fix this simply remove the ToString() in the return statement that was converting the buffer to a string. BUG=b:123925776 Change-Id: I7cd4244a1ccc7397d5969b817a52ea48867b4d17 Signed-off-by: Duncan Laurie <dlaurie@google.com> Reviewed-on: https://review.coreboot.org/c/coreboot/+/31807 Reviewed-by: Furquan Shaikh <furquan@google.com> Tested-by: build bot (Jenkins) <no-reply@coreboot.org>