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-rw-r--r--fs/cramfs/cramfs.c38
1 files changed, 23 insertions, 15 deletions
diff --git a/fs/cramfs/cramfs.c b/fs/cramfs/cramfs.c
index 98ff567269..f02bf3c744 100644
--- a/fs/cramfs/cramfs.c
+++ b/fs/cramfs/cramfs.c
@@ -42,17 +42,22 @@
struct cramfs_super super;
+/* CPU address space offset calculation macro, struct part_info offset is
+ * device address space offset, so we need to shift it by a device start address. */
+extern flash_info_t flash_info[CFG_MAX_FLASH_BANKS];
+#define PART_OFFSET(x) (x->offset + flash_info[x->dev->id->num].start[0])
+
static int cramfs_read_super (struct part_info *info)
{
unsigned long root_offset;
/* Read the first block and get the superblock from it */
- memcpy (&super, (void *) info->offset, sizeof (super));
+ memcpy (&super, (void *) PART_OFFSET(info), sizeof (super));
/* Do sanity checks on the superblock */
if (super.magic != CRAMFS_32 (CRAMFS_MAGIC)) {
/* check at 512 byte offset */
- memcpy (&super, (void *) info->offset + 512, sizeof (super));
+ memcpy (&super, (void *) PART_OFFSET(info) + 512, sizeof (super));
if (super.magic != CRAMFS_32 (CRAMFS_MAGIC)) {
printf ("cramfs: wrong magic\n");
return -1;
@@ -87,7 +92,7 @@ static int cramfs_read_super (struct part_info *info)
return 0;
}
-static unsigned long cramfs_resolve (char *begin, unsigned long offset,
+static unsigned long cramfs_resolve (unsigned long begin, unsigned long offset,
unsigned long size, int raw,
char *filename)
{
@@ -150,7 +155,7 @@ static unsigned long cramfs_resolve (char *begin, unsigned long offset,
return 0;
}
-static int cramfs_uncompress (char *begin, unsigned long offset,
+static int cramfs_uncompress (unsigned long begin, unsigned long offset,
unsigned long loadoffset)
{
struct cramfs_inode *inode = (struct cramfs_inode *) (begin + offset);
@@ -187,7 +192,7 @@ int cramfs_load (char *loadoffset, struct part_info *info, char *filename)
if (cramfs_read_super (info))
return -1;
- offset = cramfs_resolve (info->offset,
+ offset = cramfs_resolve (PART_OFFSET(info),
CRAMFS_GET_OFFSET (&(super.root)) << 2,
CRAMFS_24 (super.root.size), 0,
strtok (filename, "/"));
@@ -195,14 +200,14 @@ int cramfs_load (char *loadoffset, struct part_info *info, char *filename)
if (offset <= 0)
return offset;
- return cramfs_uncompress (info->offset, offset,
+ return cramfs_uncompress (PART_OFFSET(info), offset,
(unsigned long) loadoffset);
}
static int cramfs_list_inode (struct part_info *info, unsigned long offset)
{
struct cramfs_inode *inode = (struct cramfs_inode *)
- (info->offset + offset);
+ (PART_OFFSET(info) + offset);
char *name, str[20];
int namelen, nextoff;
@@ -233,7 +238,7 @@ static int cramfs_list_inode (struct part_info *info, unsigned long offset)
unsigned long size = CRAMFS_24 (inode->size);
char *link = malloc (size);
- if (link != NULL && cramfs_uncompress (info->offset, offset,
+ if (link != NULL && cramfs_uncompress (PART_OFFSET(info), offset,
(unsigned long) link)
== size)
printf (" -> %*.*s\n", (int) size, (int) size, link);
@@ -262,7 +267,7 @@ int cramfs_ls (struct part_info *info, char *filename)
size = CRAMFS_24 (super.root.size);
} else {
/* Resolve the path */
- offset = cramfs_resolve (info->offset,
+ offset = cramfs_resolve (PART_OFFSET(info),
CRAMFS_GET_OFFSET (&(super.root)) <<
2, CRAMFS_24 (super.root.size), 1,
strtok (filename, "/"));
@@ -271,7 +276,7 @@ int cramfs_ls (struct part_info *info, char *filename)
return offset;
/* Resolving was successful. Examine the inode */
- inode = (struct cramfs_inode *) (info->offset + offset);
+ inode = (struct cramfs_inode *) (PART_OFFSET(info) + offset);
if (!S_ISDIR (CRAMFS_16 (inode->mode))) {
/* It's not a directory - list it, and that's that */
return (cramfs_list_inode (info, offset) > 0);
@@ -284,7 +289,7 @@ int cramfs_ls (struct part_info *info, char *filename)
/* List the given directory */
while (inodeoffset < size) {
- inode = (struct cramfs_inode *) (info->offset + offset +
+ inode = (struct cramfs_inode *) (PART_OFFSET(info) + offset +
inodeoffset);
nextoffset = cramfs_list_inode (info, offset + inodeoffset);
@@ -324,14 +329,17 @@ int cramfs_info (struct part_info *info)
int cramfs_check (struct part_info *info)
{
- struct cramfs_super *sb = (struct cramfs_super *) info->offset;
+ struct cramfs_super *sb;
+
+ if (info->dev->id->type != MTD_DEV_TYPE_NOR)
+ return 0;
+ sb = (struct cramfs_super *) PART_OFFSET(info);
if (sb->magic != CRAMFS_32 (CRAMFS_MAGIC)) {
/* check at 512 byte offset */
- sb = (struct cramfs_super *) (info->offset + 512);
- if (sb->magic != CRAMFS_32 (CRAMFS_MAGIC)) {
+ sb = (struct cramfs_super *) (PART_OFFSET(info) + 512);
+ if (sb->magic != CRAMFS_32 (CRAMFS_MAGIC))
return 0;
- }
}
return 1;
}
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