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sf: Query write-protection status before operating the flash

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Do not suggest successful operation if a flash area to be changed is
actually locked, thus will not execute the request. Rather report an
error and bail out. That's way more user-friendly than asking them to
manually check for this case.

Derived from original patch by Chao Zeng.

Signed-off-by: Jan Kiszka <jan.kiszka@siemens.com>
Acked-by: Jagan Teki <jagan@amarulasolutions.com>
This commit is contained in:
Jan Kiszka 2022-03-02 15:01:56 +01:00 committed by Jagan Teki
parent 513c6071ce
commit f3a56dda88
1 changed files with 12 additions and 0 deletions
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12
cmd/sf.c
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@ -294,6 +294,12 @@ static int do_spi_flash_read_write(int argc, char *const argv[])
return 1;
}
if (strncmp(argv[0], "read", 4) != 0 && flash->flash_is_unlocked &&
!flash->flash_is_unlocked(flash, offset, len)) {
printf("ERROR: flash area is locked\n");
return 1;
}
buf = map_physmem(addr, len, MAP_WRBACK);
if (!buf && addr) {
puts("Failed to map physical memory\n");
@ -350,6 +356,12 @@ static int do_spi_flash_erase(int argc, char *const argv[])
return 1;
}
if (flash->flash_is_unlocked &&
!flash->flash_is_unlocked(flash, offset, len)) {
printf("ERROR: flash area is locked\n");
return 1;
}
ret = spi_flash_erase(flash, offset, size);
printf("SF: %zu bytes @ %#x Erased: ", (size_t)size, (u32)offset);
if (ret)