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util/nvmutil: don't set part in write_mac_part

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make a helper for cmd_setchecksum with size_t arg,
and use it in write_mac_part.

Signed-off-by: Leah Rowe <leah@libreboot.org>
This commit is contained in:
Leah Rowe
2026-03-06 19:35:54 +00:00
parent c6c4e5303e
commit f316701d74
1 changed files with 10 additions and 4 deletions
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util/nvmutil/nvmutil.c
+10 -4
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@@ -35,6 +35,7 @@ static void cmd_dump(void);
static void print_mac_address(size_t);
static void hexdump(size_t);
static void cmd_setchecksum(void);
static void set_checksum(size_t);
static void cmd_brick(void);
static void cmd_copy(void);
static void cmd_swap(void);
@@ -539,7 +540,6 @@ write_mac_part(size_t partnum)
{
size_t w;
part = partnum;
if (!good_checksum(partnum))
return 0;
@@ -549,7 +549,7 @@ write_mac_part(size_t partnum)
printf("Wrote MAC address to part %zu: ", partnum);
print_mac_address(partnum);
cmd_setchecksum();
set_checksum(partnum);
return 1;
}
@@ -607,14 +607,20 @@ hexdump(size_t partnum)
static void
cmd_setchecksum(void)
{
set_checksum(part);
}
static void
set_checksum(size_t p)
{
size_t c;
uint16_t val16 = 0;
for (c = 0; c < NVM_CHECKSUM_WORD; c++)
val16 += word(c, part);
val16 += word(c, p);
set_word(NVM_CHECKSUM_WORD, part, NVM_CHECKSUM - val16);
set_word(NVM_CHECKSUM_WORD, p, NVM_CHECKSUM - val16);
}
static void