From: Charles Manning <cdhmanning@gmail.com>
Date: Sun, 3 Apr 2011 19:57:39 +0000 (+1200)
Subject: yaffs: Discard partially written summary data
X-Git-Tag: pre-driver-refactoring~41^2~13
X-Git-Url: http://www.aleph1.co.uk/gitweb/?p=yaffs2.git;a=commitdiff_plain;h=ce2c1ba4eba2b445c8a9c871eebe1c71b4303fd1

yaffs: Discard partially written summary data

A power failure during the write of a multi-chunk summary can leave stuff
lying around that  looks like part of a file. If this is detected then delete it.

Signed-off-by: Charles Manning <cdhmanning@gmail.com>
---

diff --git a/yaffs_yaffs2.c b/yaffs_yaffs2.c
index 093e485..5761e96 100644
--- a/yaffs_yaffs2.c
+++ b/yaffs_yaffs2.c
@@ -1023,6 +1023,7 @@ static inline int yaffs2_scan_chunk(struct yaffs_dev *dev,
 			dev->n_free_chunks++;
 	} else if (tags.obj_id > YAFFS_MAX_OBJECT_ID ||
 		   tags.chunk_id > YAFFS_MAX_CHUNK_ID ||
+		   tags.obj_id == YAFFS_OBJECTID_SUMMARY ||
 		   (tags.chunk_id > 0 &&
 		     tags.n_bytes > dev->data_bytes_per_chunk) ||
 		   tags.seq_number != bi->seq_number) {