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Diffstat (limited to 'disk')
-rw-r--r--disk/part_efi.c6
1 files changed, 4 insertions, 2 deletions
diff --git a/disk/part_efi.c b/disk/part_efi.c
index 72e3997b84..5c1039f013 100644
--- a/disk/part_efi.c
+++ b/disk/part_efi.c
@@ -350,8 +350,6 @@ static int set_protective_mbr(struct blk_desc *dev_desc)
{
/* Setup the Protective MBR */
ALLOC_CACHE_ALIGN_BUFFER_PAD(legacy_mbr, p_mbr, 1, dev_desc->blksz);
- memset(p_mbr, 0, sizeof(*p_mbr));
-
if (p_mbr == NULL) {
printf("%s: calloc failed!\n", __func__);
return -1;
@@ -363,6 +361,10 @@ static int set_protective_mbr(struct blk_desc *dev_desc)
return -1;
}
+ /* Clear all data in MBR except of backed up boot code */
+ memset((char *)p_mbr + MSDOS_MBR_BOOT_CODE_SIZE, 0, sizeof(*p_mbr) -
+ MSDOS_MBR_BOOT_CODE_SIZE);
+
/* Append signature */
p_mbr->signature = MSDOS_MBR_SIGNATURE;
p_mbr->partition_record[0].sys_ind = EFI_PMBR_OSTYPE_EFI_GPT;