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>

diff --git a/yaffs_tagscompat.c b/yaffs_tagscompat.c
index 2cf783e65a9bf998ba53df8c9738fbe9350124e5..b51bccd6c91ab50a099e6a262739bfdf460af8a7 100644 (file)
--- 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.
  *
  * 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"
  */
 
 #include "yaffs_guts.h"


@@ -455,20 +455,22 @@ int yaffs_TagsCompatabilityReadChunkWithTagsFromNAND(yaffs_Device * dev,
                        int deleted =
                            (yaffs_CountBits(spare.pageStatus) < 7) ? 1 : 0;
 
                        int deleted =
                            (yaffs_CountBits(spare.pageStatus) < 7) ? 1 : 0;
 

-                       yaffs_GetTagsFromSpare(dev, &spare, &tags);
-

                        eTags->chunkDeleted = deleted;
                        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->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;
                        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;
                }
 
                return YAFFS_OK;