[PARTITION] MSDOS: Fix Sun num_partitions handling.
Correct the Solaris x86 number of partitions (slices) is a way that is
backward compatible with the earlier size.
This works without a new VTOC structure definition as the timestamp
and v_asciilabel fields in the VTOC are not used by the kernel yet.
Signed-off-by: Mark Fortescue <mark@mtfhpc.demon.co.uk>
Signed-off-by: David S. Miller <davem@davemloft.net>
diff --git a/fs/partitions/msdos.c b/fs/partitions/msdos.c
index 4ccec4cd..5567ec0 100644
--- a/fs/partitions/msdos.c
+++ b/fs/partitions/msdos.c
@@ -203,6 +203,7 @@
Sector sect;
struct solaris_x86_vtoc *v;
int i;
+ short max_nparts;
v = (struct solaris_x86_vtoc *)read_dev_sector(bdev, offset+1, §);
if (!v)
@@ -218,7 +219,9 @@
put_dev_sector(sect);
return;
}
- for (i=0; i<SOLARIS_X86_NUMSLICE && state->next<state->limit; i++) {
+ /* Ensure we can handle previous case of VTOC with 8 entries gracefully */
+ max_nparts = le16_to_cpu (v->v_nparts) > 8 ? SOLARIS_X86_NUMSLICE : 8;
+ for (i=0; i<max_nparts && state->next<state->limit; i++) {
struct solaris_x86_slice *s = &v->v_slice[i];
if (s->s_size == 0)
continue;
diff --git a/include/linux/genhd.h b/include/linux/genhd.h
index 9756fc1..a47b802 100644
--- a/include/linux/genhd.h
+++ b/include/linux/genhd.h
@@ -264,7 +264,7 @@
#ifdef CONFIG_SOLARIS_X86_PARTITION
-#define SOLARIS_X86_NUMSLICE 8
+#define SOLARIS_X86_NUMSLICE 16
#define SOLARIS_X86_VTOC_SANE (0x600DDEEEUL)
struct solaris_x86_slice {