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-rw-r--r--fs/partitions/msdos.c12
1 files changed, 11 insertions, 1 deletions
diff --git a/fs/partitions/msdos.c b/fs/partitions/msdos.c
index 8c7af177781..dafd3b6b2dc 100644
--- a/fs/partitions/msdos.c
+++ b/fs/partitions/msdos.c
@@ -63,15 +63,25 @@ msdos_magic_present(unsigned char *p)
#define AIX_LABEL_MAGIC4 0xC1
static int aix_magic_present(unsigned char *p, struct block_device *bdev)
{
+ struct partition *pt = (struct partition *) (p + 0x1be);
Sector sect;
unsigned char *d;
- int ret = 0;
+ int slot, ret = 0;
if (p[0] != AIX_LABEL_MAGIC1 &&
p[1] != AIX_LABEL_MAGIC2 &&
p[2] != AIX_LABEL_MAGIC3 &&
p[3] != AIX_LABEL_MAGIC4)
return 0;
+ /* Assume the partition table is valid if Linux partitions exists */
+ for (slot = 1; slot <= 4; slot++, pt++) {
+ if (pt->sys_ind == LINUX_SWAP_PARTITION ||
+ pt->sys_ind == LINUX_RAID_PARTITION ||
+ pt->sys_ind == LINUX_DATA_PARTITION ||
+ pt->sys_ind == LINUX_LVM_PARTITION ||
+ is_extended_partition(pt))
+ return 0;
+ }
d = read_dev_sector(bdev, 7, &sect);
if (d) {
if (d[0] == '_' && d[1] == 'L' && d[2] == 'V' && d[3] == 'M')