xilinx: board: Fix xilinx_eeprom_legacy_cleanup()

When ethernet mac address contains 0x20 or 0xff MAC address is changed and
bytes are converted to zeros. That's why fix decoding algorithm to ignore
fields where MAC address is stored and all non printable chars (including
space) are zeroed.

Signed-off-by: Michal Simek <michal.simek@amd.com>
Link: https://lore.kernel.org/r/2802cf1086b14c181356810006fe886f950a36f3.1674573561.git.michal.simek@amd.com

diff --git a/board/xilinx/common/board.c b/board/xilinx/common/board.c
index 6cdb000..ed393f7 100644 (file)
--- a/board/xilinx/common/board.c
+++ b/board/xilinx/common/board.c
@@ -102,9 +102,13 @@ static void xilinx_eeprom_legacy_cleanup(char *eeprom, int size)
        for (i = 0; i < size; i++) {
                byte = eeprom[i];
 
-               /* Remove all ffs and spaces */
-               if (byte == 0xff || byte == ' ')
+               /* Remove all non printable chars but ignore MAC address */
+               if ((i < offsetof(struct xilinx_legacy_format, eth_mac) ||
+                    i >= offsetof(struct xilinx_legacy_format, unused1)) &&
+                    (byte < '!' || byte > '~')) {
                        eeprom[i] = 0;
+                       continue;
+               }
 
                /* Convert strings to lower case */
                if (byte >= 'A' && byte <= 'Z')