[S] Change in coreboot[master]: mb/prodrive/atlas: Make default SN/PN not empty

[Angel Pons (Code Review)]

Angel Pons has uploaded this change for review. ( https://review.coreboot.org/c/coreboot/+/75132 )

Change subject: mb/prodrive/atlas: Make default SN/PN not empty
......................................................................

mb/prodrive/atlas: Make default SN/PN not empty

If reading the serial/part number fails, returning an empty string is
very confusing. Instead, return "INVALID" to make problems obvious.

Change-Id: I3c174ca76d51b44456c7b68f4fcffb4c8f9379be
Signed-off-by: Angel Pons 
---
M src/mainboard/prodrive/atlas/vpd.c
1 file changed, 20 insertions(+), 2 deletions(-)

git pull ssh://review.coreboot.org:29418/coreboot refs/changes/32/75132/1

diff --git a/src/mainboard/prodrive/atlas/vpd.c b/src/mainboard/prodrive/atlas/vpd.c
index 75d1caf..ba249a9 100644
--- a/src/mainboard/prodrive/atlas/vpd.c
+++ b/src/mainboard/prodrive/atlas/vpd.c
@@ -8,6 +8,11 @@
 #include "mainboard.h"
 #include "vpd.h"

+static void write_invalid_str(char *dest, size_t length)
+{
+	snprintf(dest, length, "%s", "INVALID");
+}
+
 const struct emi_eeprom_vpd *get_emi_eeprom_vpd(void)
 {
    static union {
@@ -48,8 +53,8 @@
    case 0:
    	memset(vpd.raw, 0, sizeof(vpd.raw));
    	vpd.layout.header.magic = VPD_MAGIC;
-		vpd.layout.serial_number[0] = '\0';
-		vpd.layout.part_number[0] = '\0';
+		write_invalid_str(vpd.layout.serial_number, sizeof(vpd.layout.serial_number));
+		write_invalid_str(vpd.layout.part_number, sizeof(vpd.layout.part_number));
    	vpd.layout.profile = ATLAS_PROF_UNPROGRAMMED;
    	__fallthrough;
    default: