From ce988b0f03f8e930859563e59ea90bdc193d1c9f Mon Sep 17 00:00:00 2001
From: marty <marty>
Date: Tue, 29 Nov 2005 20:54:32 +0000
Subject: [PATCH] Subject: [Yaffs] Avoid tagsEccUnfixed stats bump on mounting 
 partially usedblock

IIUC, yaffs1 compatibility mode checks tags ECCs and updates
stats on tags ECC errors when scanning an unused chunk of a
partially-allocated block at mount time.  This causes a
mildly alarming "tagsEccUnfixed..... 1" in /proc/yaffs.
Suggested fix below.

Signed-off-by: Todd Poynor <tpoynor@mvista.com>
---
 yaffs_tagscompat.c | 18 ++++++++++--------
 1 file changed, 10 insertions(+), 8 deletions(-)

diff --git a/yaffs_tagscompat.c b/yaffs_tagscompat.c
index 2cf783e..b51bccd 100644
--- a/yaffs_tagscompat.c
+++ b/yaffs_tagscompat.c
@@ -10,7 +10,7 @@
  * it under the terms of the GNU General Public License version 2 as
  * published by the Free Software Foundation.
  *
- * $Id: yaffs_tagscompat.c,v 1.7 2005-09-20 23:12:38 charles Exp $
+ * $Id: yaffs_tagscompat.c,v 1.8 2005-11-29 20:54:32 marty Exp $
  */
 
 #include "yaffs_guts.h"
@@ -455,20 +455,22 @@ int yaffs_TagsCompatabilityReadChunkWithTagsFromNAND(yaffs_Device * dev,
 			int deleted =
 			    (yaffs_CountBits(spare.pageStatus) < 7) ? 1 : 0;
 
-			yaffs_GetTagsFromSpare(dev, &spare, &tags);
-
 			eTags->chunkDeleted = deleted;
-			eTags->objectId = tags.objectId;
-			eTags->chunkId = tags.chunkId;
-			eTags->byteCount = tags.byteCount;
-			eTags->serialNumber = tags.serialNumber;
 			eTags->eccResult = eccResult;
 			eTags->blockBad = 0;	/* We're reading it */
 			/* therefore it is not a bad block */
-
 			eTags->chunkUsed =
 			    (memcmp(&spareFF, &spare, sizeof(spareFF)) !=
 			     0) ? 1 : 0;
+
+			if (eTags->chunkUsed) {
+				yaffs_GetTagsFromSpare(dev, &spare, &tags);
+
+				eTags->objectId = tags.objectId;
+				eTags->chunkId = tags.chunkId;
+				eTags->byteCount = tags.byteCount;
+				eTags->serialNumber = tags.serialNumber;
+			}
 		}
 
 		return YAFFS_OK;
-- 
2.30.2