2 files changed, 13 insertions, 1 deletions

diff --git a/fs/partitions/msdos.c b/fs/partitions/msdos.c
index 8c7af1777819..dafd3b6b2dc3 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')
diff --git a/include/linux/genhd.h b/include/linux/genhd.h
index 0a022b2f63fc..7a566fad3f72 100644
--- a/include/linux/genhd.h
+++ b/include/linux/genhd.h
@@ -21,6 +21,8 @@ enum {
         WIN98_EXTENDED_PARTITION = 0x0f,
 
         LINUX_SWAP_PARTITION = 0x82,
+        LINUX_DATA_PARTITION = 0x83,
+        LINUX_LVM_PARTITION = 0x8e,
         LINUX_RAID_PARTITION = 0xfd,    /* autodetect RAID partition */
 
         SOLARIS_X86_PARTITION = LINUX_SWAP_PARTITION,