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authorMark Fortescue <mark@mtfhpc.demon.co.uk>2007-07-25 18:30:08 -0700
committerDavid S. Miller <davem@sunset.davemloft.net>2007-07-30 00:27:28 -0700
commitb84d879639f83d35d3fcd909222522c928bf974b (patch)
tree10ef0162543eca2b6107bd44646133a341777177
parentcce933bc831c451f48ca26e5b0d9bfdfbfb327f8 (diff)
[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>
-rw-r--r--fs/partitions/msdos.c5
-rw-r--r--include/linux/genhd.h2
2 files changed, 5 insertions, 2 deletions
diff --git a/fs/partitions/msdos.c b/fs/partitions/msdos.c
index 4ccec4cd1367..5567ec0d03a3 100644
--- a/fs/partitions/msdos.c
+++ b/fs/partitions/msdos.c
@@ -203,6 +203,7 @@ parse_solaris_x86(struct parsed_partitions *state, struct block_device *bdev,
Sector sect;
struct solaris_x86_vtoc *v;
int i;
+ short max_nparts;
v = (struct solaris_x86_vtoc *)read_dev_sector(bdev, offset+1, &sect);
if (!v)
@@ -218,7 +219,9 @@ parse_solaris_x86(struct parsed_partitions *state, struct block_device *bdev,
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 9756fc102a83..a47b8025d399 100644
--- a/include/linux/genhd.h
+++ b/include/linux/genhd.h
@@ -264,7 +264,7 @@ static inline void set_capacity(struct gendisk *disk, sector_t size)
#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 {