[kernel] generic-2.6: revert yaffs changes [11378], the new code is not working corre...

[openwrt.git] / target / linux / generic-2.6 / files-2.6.26 / fs / yaffs2 / yaffs_mtdif2.c

diff --git a/target/linux/generic-2.6/files-2.6.26/fs/yaffs2/yaffs_mtdif2.c b/target/linux/generic-2.6/files-2.6.26/fs/yaffs2/yaffs_mtdif2.c
index 3768b9b..cdad073 100644 (file)
--- a/target/linux/generic-2.6/files-2.6.26/fs/yaffs2/yaffs_mtdif2.c
+++ b/target/linux/generic-2.6/files-2.6.26/fs/yaffs2/yaffs_mtdif2.c
@@ -14,7 +14,7 @@
 /* mtd interface for YAFFS2 */
 
 const char *yaffs_mtdif2_c_version =
-    "$Id: yaffs_mtdif2.c,v 1.20 2008-05-05 07:58:58 charles Exp $";
+    "$Id: yaffs_mtdif2.c,v 1.17 2007-02-14 01:09:06 wookey Exp $";
 
 #include "yportenv.h"
 
@@ -27,23 +27,19 @@ const char *yaffs_mtdif2_c_version =
 
 #include "yaffs_packedtags2.h"
 
-/* NB For use with inband tags....
- * We assume that the data buffer is of size totalBytersPerChunk so that we can also
- * use it to load the tags.
- */
 int nandmtd2_WriteChunkWithTagsToNAND(yaffs_Device * dev, int chunkInNAND,
                                      const __u8 * data,
                                      const yaffs_ExtendedTags * tags)
 {
        struct mtd_info *mtd = (struct mtd_info *)(dev->genericDevice);
-#if (MTD_VERSION_CODE > MTD_VERSION(2,6,17))
+#if (LINUX_VERSION_CODE > KERNEL_VERSION(2,6,17))
        struct mtd_oob_ops ops;
 #else
        size_t dummy;
 #endif
        int retval = 0;
 
-       loff_t addr;
+       loff_t addr = ((loff_t) chunkInNAND) * dev->nDataBytesPerChunk;
 
        yaffs_PackedTags2 pt;
 
@@ -51,42 +47,47 @@ int nandmtd2_WriteChunkWithTagsToNAND(yaffs_Device * dev, int chunkInNAND,
          (TSTR
           ("nandmtd2_WriteChunkWithTagsToNAND chunk %d data %p tags %p"
            TENDSTR), chunkInNAND, data, tags));
-           
-
-       addr  = ((loff_t) chunkInNAND) * dev->totalBytesPerChunk;
-       
-       /* For yaffs2 writing there must be both data and tags.
-        * If we're using inband tags, then the tags are stuffed into
-        * the end of the data buffer.
-        */
-       if(!data || !tags)
-               BUG();  
-       else if(dev->inbandTags){
-               yaffs_PackedTags2TagsPart *pt2tp;
-               pt2tp = (yaffs_PackedTags2TagsPart *)(data + dev->nDataBytesPerChunk);
-               yaffs_PackTags2TagsPart(pt2tp,tags);
-       }
-       else
-               yaffs_PackTags2(&pt, tags);
-       
+
 #if (LINUX_VERSION_CODE > KERNEL_VERSION(2,6,17))
-       ops.mode = MTD_OOB_AUTO;
-       ops.ooblen = (dev->inbandTags) ? 0 : sizeof(pt);
-       ops.len = dev->totalBytesPerChunk;
-       ops.ooboffs = 0;
-       ops.datbuf = (__u8 *)data;
-       ops.oobbuf = (dev->inbandTags) ? NULL : (void *)&pt;
-       retval = mtd->write_oob(mtd, addr, &ops);
+       if (tags)
+               yaffs_PackTags2(&pt, tags);
+       else
+               BUG(); /* both tags and data should always be present */
 
+       if (data) {
+               ops.mode = MTD_OOB_AUTO;
+               ops.ooblen = sizeof(pt);
+               ops.len = dev->nDataBytesPerChunk;
+               ops.ooboffs = 0;
+               ops.datbuf = (__u8 *)data;
+               ops.oobbuf = (void *)&pt;
+               retval = mtd->write_oob(mtd, addr, &ops);
+       } else
+               BUG(); /* both tags and data should always be present */
 #else
-       if (!dev->inbandTags) {
-               retval =
-                   mtd->write_ecc(mtd, addr, dev->nDataBytesPerChunk,
-                                  &dummy, data, (__u8 *) & pt, NULL);
+       if (tags) {
+               yaffs_PackTags2(&pt, tags);
+       }
+
+       if (data && tags) {
+               if (dev->useNANDECC)
+                       retval =
+                           mtd->write_ecc(mtd, addr, dev->nDataBytesPerChunk,
+                                          &dummy, data, (__u8 *) & pt, NULL);
+               else
+                       retval =
+                           mtd->write_ecc(mtd, addr, dev->nDataBytesPerChunk,
+                                          &dummy, data, (__u8 *) & pt, NULL);
        } else {
-               retval =
-                   mtd->write(mtd, addr, dev->totalBytesPerChunk, &dummy,
-                              data);
+               if (data)
+                       retval =
+                           mtd->write(mtd, addr, dev->nDataBytesPerChunk, &dummy,
+                                      data);
+               if (tags)
+                       retval =
+                           mtd->write_oob(mtd, addr, mtd->oobsize, &dummy,
+                                          (__u8 *) & pt);
+
        }
 #endif
 
@@ -100,12 +101,11 @@ int nandmtd2_ReadChunkWithTagsFromNAND(yaffs_Device * dev, int chunkInNAND,
                                       __u8 * data, yaffs_ExtendedTags * tags)
 {
        struct mtd_info *mtd = (struct mtd_info *)(dev->genericDevice);
-#if (MTD_VERSION_CODE > MTD_VERSION(2,6,17))
+#if (LINUX_VERSION_CODE > KERNEL_VERSION(2,6,17))
        struct mtd_oob_ops ops;
 #endif
        size_t dummy;
        int retval = 0;
-       int localData = 0;
 
        loff_t addr = ((loff_t) chunkInNAND) * dev->nDataBytesPerChunk;
 
@@ -115,21 +115,10 @@ int nandmtd2_ReadChunkWithTagsFromNAND(yaffs_Device * dev, int chunkInNAND,
          (TSTR
           ("nandmtd2_ReadChunkWithTagsFromNAND chunk %d data %p tags %p"
            TENDSTR), chunkInNAND, data, tags));
-           
-       if(dev->inbandTags){
-               
-               if(!data) {
-                       localData = 1;
-                       data = yaffs_GetTempBuffer(dev,__LINE__);
-               }
-               
-
-       }
-
 
 #if (LINUX_VERSION_CODE > KERNEL_VERSION(2,6,17))
-       if (dev->inbandTags || (data && !tags))
-               retval = mtd->read(mtd, addr, dev->totalBytesPerChunk,
+       if (data && !tags)
+               retval = mtd->read(mtd, addr, dev->nDataBytesPerChunk,
                                &dummy, data);
        else if (tags) {
                ops.mode = MTD_OOB_AUTO;
@@ -141,43 +130,38 @@ int nandmtd2_ReadChunkWithTagsFromNAND(yaffs_Device * dev, int chunkInNAND,
                retval = mtd->read_oob(mtd, addr, &ops);
        }
 #else
-       if (!dev->inbandTags && data && tags) {
-
-               retval = mtd->read_ecc(mtd, addr, dev->nDataBytesPerChunk,
+       if (data && tags) {
+               if (dev->useNANDECC) {
+                       retval =
+                           mtd->read_ecc(mtd, addr, dev->nDataBytesPerChunk,
                                          &dummy, data, dev->spareBuffer,
                                          NULL);
+               } else {
+                       retval =
+                           mtd->read_ecc(mtd, addr, dev->nDataBytesPerChunk,
+                                         &dummy, data, dev->spareBuffer,
+                                         NULL);
+               }
        } else {
                if (data)
                        retval =
                            mtd->read(mtd, addr, dev->nDataBytesPerChunk, &dummy,
                                      data);
-               if (!dev->inbandTags && tags)
+               if (tags)
                        retval =
                            mtd->read_oob(mtd, addr, mtd->oobsize, &dummy,
                                          dev->spareBuffer);
        }
 #endif
 
+       memcpy(&pt, dev->spareBuffer, sizeof(pt));
 
-       if(dev->inbandTags){
-               if(tags){
-                       yaffs_PackedTags2TagsPart * pt2tp;
-                       pt2tp = (yaffs_PackedTags2TagsPart *)&data[dev->nDataBytesPerChunk];    
-                       yaffs_UnpackTags2TagsPart(tags,pt2tp);
-               }
-       }
-       else {
-               if (tags){
-                       memcpy(&pt, dev->spareBuffer, sizeof(pt));
-                       yaffs_UnpackTags2(tags, &pt);
-               }
-       }
+       if (tags)
+               yaffs_UnpackTags2(tags, &pt);
 
-       if(localData)
-               yaffs_ReleaseTempBuffer(dev,data,__LINE__);
-       
        if(tags && retval == -EBADMSG && tags->eccResult == YAFFS_ECC_RESULT_NO_ERROR)
-               tags->eccResult = YAFFS_ECC_RESULT_UNFIXED;             
+               tags->eccResult = YAFFS_ECC_RESULT_UNFIXED;
+
        if (retval == 0)
                return YAFFS_OK;
        else