[U-Boot] [PATCH 2/4] sunxi: Ensure that the NIC specific bytes of the mac are not all 0

[Hans de Goede]

On 2 of my H3 boards bytes 13-15 of the SID are all 0 leading to
the NIC specific bytes of the mac all being 0, which leads to the
boards not getting an ipv6 address from the dhcp server.

This commits adds a check to ensure this does not happen.

Cc: Chen-Yu Tsai <wens at csie.org>
Cc: Corentin LABBE <clabbe.montjoie at gmail.com>
Cc: Amit Singh Tomar <amittomer25 at gmail.com>
Signed-off-by: Hans de Goede <hdegoede at redhat.com>
---
 board/sunxi/board.c | 4 ++++
 1 file changed, 4 insertions(+)

diff --git a/board/sunxi/board.c b/board/sunxi/board.c
index 36cf963..ef3fe26 100644
--- a/board/sunxi/board.c
+++ b/board/sunxi/board.c
@@ -623,6 +623,10 @@ static void setup_environment(const void *fdt)
 
 	ret = sunxi_get_sid(sid);
 	if (ret == 0 && sid[0] != 0 && sid[3] != 0) {
+		/* Ensure the NIC specific bytes of the mac are not all 0 */
+		if ((sid[3] & 0xffffff) == 0)
+			sid[3] |= 0x800000;
+
 		for (i = 0; i < 4; i++) {
 			sprintf(ethaddr, "ethernet%d", i);
 			if (!fdt_get_alias(fdt, ethaddr))
-- 
2.7.4