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path: root/fs/jffs2/jffs2_1pass.c
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Diffstat (limited to 'fs/jffs2/jffs2_1pass.c')
-rw-r--r--fs/jffs2/jffs2_1pass.c25
1 files changed, 25 insertions, 0 deletions
diff --git a/fs/jffs2/jffs2_1pass.c b/fs/jffs2/jffs2_1pass.c
index c55d472047..432579239d 100644
--- a/fs/jffs2/jffs2_1pass.c
+++ b/fs/jffs2/jffs2_1pass.c
@@ -1528,6 +1528,8 @@ jffs2_1pass_build_lists(struct part_info * part)
uint32_t sumlen;
int ret;
#endif
+ /* Indicates a sector with a CLEANMARKER was found */
+ int clean_sector = 0;
/* Set buf_size to maximum length */
buf_size = DEFAULT_EMPTY_SCAN_SIZE;
@@ -1652,6 +1654,14 @@ jffs2_1pass_build_lists(struct part_info * part)
ofs += 4;
}
/* Ran off end. */
+ /*
+ * If this sector had a clean marker at the
+ * beginning, and immediately following this
+ * have been a bunch of FF bytes, treat the
+ * entire sector as empty.
+ */
+ if (clean_sector)
+ break;
/* See how much more there is to read in this
* eraseblock...
@@ -1673,6 +1683,11 @@ jffs2_1pass_build_lists(struct part_info * part)
buf_ofs = ofs;
goto more_empty;
}
+ /*
+ * Found something not erased in the sector, so reset
+ * the 'clean_sector' flag.
+ */
+ clean_sector = 0;
if (node->magic != JFFS2_MAGIC_BITMASK ||
!hdr_crc(node)) {
ofs += 4;
@@ -1754,6 +1769,16 @@ jffs2_1pass_build_lists(struct part_info * part)
"%d != %zu\n",
node->totlen,
sizeof(struct jffs2_unknown_node));
+ if ((node->totlen ==
+ sizeof(struct jffs2_unknown_node)) &&
+ (ofs == sector_ofs)) {
+ /*
+ * Found a CLEANMARKER at the beginning
+ * of the sector. It's in the correct
+ * place with correct size and CRC.
+ */
+ clean_sector = 1;
+ }
break;
case JFFS2_NODETYPE_PADDING:
if (node->totlen < sizeof(struct jffs2_unknown_node))