openwrt/target/linux/generic/patches-3.9/508-yaffs-3.3-use-mtd_-helpers.patch

--- a/fs/yaffs2/yaffs_mtdif1.c
+++ b/fs/yaffs2/yaffs_mtdif1.c
@@ -133,7 +133,7 @@ int nandmtd1_WriteChunkWithTagsToNAND(ya
 	ops.datbuf = (__u8 *)data;
 	ops.oobbuf = (__u8 *)&pt1;
 
-	retval = mtd->write_oob(mtd, addr, &ops);
+	retval = mtd_write_oob(mtd, addr, &ops);
 	if (retval) {
 		T(YAFFS_TRACE_MTD,
 			(TSTR("write_oob failed, chunk %d, mtd error %d"TENDSTR),
@@ -194,7 +194,7 @@ int nandmtd1_ReadChunkWithTagsFromNAND(y
 	/* Read page and oob using MTD.
 	 * Check status and determine ECC result.
 	 */
-	retval = mtd->read_oob(mtd, addr, &ops);
+	retval = mtd_read_oob(mtd, addr, &ops);
 	if (retval) {
 		T(YAFFS_TRACE_MTD,
 			(TSTR("read_oob failed, chunk %d, mtd error %d"TENDSTR),
@@ -218,7 +218,7 @@ int nandmtd1_ReadChunkWithTagsFromNAND(y
 		/* fall into... */
 	default:
 		rettags(etags, YAFFS_ECC_RESULT_UNFIXED, 0);
-		etags->block_bad = (mtd->block_isbad)(mtd, addr);
+		etags->block_bad = mtd_block_isbad(mtd, addr);
 		return YAFFS_FAIL;
 	}
 
@@ -286,7 +286,7 @@ int nandmtd1_MarkNANDBlockBad(struct yaf
 
 	T(YAFFS_TRACE_BAD_BLOCKS,(TSTR("marking block %d bad"TENDSTR), block_no));
 
-	retval = mtd->block_markbad(mtd, (loff_t)blocksize * block_no);
+	retval = mtd_block_markbad(mtd, (loff_t)blocksize * block_no);
 	return (retval) ? YAFFS_FAIL : YAFFS_OK;
 }
 
@@ -336,7 +336,7 @@ int nandmtd1_QueryNANDBlock(struct yaffs
 		return YAFFS_FAIL;
 
 	retval = nandmtd1_ReadChunkWithTagsFromNAND(dev, chunkNo, NULL, &etags);
-	etags.block_bad = (mtd->block_isbad)(mtd, addr);
+	etags.block_bad = mtd_block_isbad(mtd, addr);
 	if (etags.block_bad) {
 		T(YAFFS_TRACE_BAD_BLOCKS,
 			(TSTR("block %d is marked bad"TENDSTR), block_no));
--- a/fs/yaffs2/yaffs_vfs_glue.c
+++ b/fs/yaffs2/yaffs_vfs_glue.c
@@ -2607,8 +2607,8 @@ static void yaffs_MTDPutSuper(struct sup
 {
 	struct mtd_info *mtd = yaffs_dev_to_mtd(yaffs_SuperToDevice(sb));
 
-	if (mtd->sync)
-		mtd->sync(mtd);
+	if (mtd)
+		mtd_sync(mtd);
 
 	put_mtd_device(mtd);
 }
--- a/fs/yaffs2/yaffs_mtdif2.c
+++ b/fs/yaffs2/yaffs_mtdif2.c
@@ -77,7 +77,7 @@ int nandmtd2_WriteChunkWithTagsToNAND(ya
 	ops.ooboffs = 0;
 	ops.datbuf = (__u8 *)data;
 	ops.oobbuf = (dev->param.inband_tags) ? NULL : packed_tags_ptr;
-	retval = mtd->write_oob(mtd, addr, &ops);
+	retval = mtd_write_oob(mtd, addr, &ops);
 
 #else
 	if (!dev->param.inband_tags) {
@@ -133,7 +133,7 @@ int nandmtd2_ReadChunkWithTagsFromNAND(y
 
 #if (LINUX_VERSION_CODE > KERNEL_VERSION(2, 6, 17))
 	if (dev->param.inband_tags || (data && !tags))
-		retval = mtd->read(mtd, addr, dev->param.total_bytes_per_chunk,
+		retval = mtd_read(mtd, addr, dev->param.total_bytes_per_chunk,
 				&dummy, data);
 	else if (tags) {
 		ops.mode = MTD_OPS_AUTO_OOB;
@@ -142,7 +142,7 @@ int nandmtd2_ReadChunkWithTagsFromNAND(y
 		ops.ooboffs = 0;
 		ops.datbuf = data;
 		ops.oobbuf = yaffs_dev_to_lc(dev)->spareBuffer;
-		retval = mtd->read_oob(mtd, addr, &ops);
+		retval = mtd_read_oob(mtd, addr, &ops);
 	}
 #else
 	if (!dev->param.inband_tags && data && tags) {
@@ -201,7 +201,7 @@ int nandmtd2_MarkNANDBlockBad(struct yaf
 	  (TSTR("nandmtd2_MarkNANDBlockBad %d" TENDSTR), block_no));
 
 	retval =
-	    mtd->block_markbad(mtd,
+	    mtd_block_markbad(mtd,
 			       block_no * dev->param.chunks_per_block *
 			       dev->param.total_bytes_per_chunk);
 
@@ -221,7 +221,7 @@ int nandmtd2_QueryNANDBlock(struct yaffs
 	T(YAFFS_TRACE_MTD,
 	  (TSTR("nandmtd2_QueryNANDBlock %d" TENDSTR), block_no));
 	retval =
-	    mtd->block_isbad(mtd,
+	    mtd_block_isbad(mtd,
 			     block_no * dev->param.chunks_per_block *
 			     dev->param.total_bytes_per_chunk);
 
--- a/fs/yaffs2/yaffs_mtdif.h
+++ b/fs/yaffs2/yaffs_mtdif.h
@@ -31,4 +31,39 @@ int nandmtd_InitialiseNAND(yaffs_dev_t *
 #define MTD_OPS_AUTO_OOB 	MTD_OOB_AUTO
 #endif
 
+#if (LINUX_VERSION_CODE < KERNEL_VERSION(3, 3, 0))
+static inline int mtd_erase(struct mdt_info *mtd, struct erase_info *ei)
+{
+	return mtd->erase(mtd, ei);
+}
+
+static inline int mtd_block_markbad(struct mtd_info *mtd, loff_t ofs)
+{
+	return mtd->block_mark_bad(mtd, ofs);
+}
+
+static inline int mtd_block_isbad(struct mtd_info *mtd, loff_t ofs)
+{
+	return mtd->block_is_bad(mtd, ofs);
+}
+
+static inline int mtd_read_oob(struct mtd_info *mtd, loff_t from,
+			       struct mtd_oob_ops *ops)
+{
+	return mtd->read_oob(mtd, from, ops);
+}
+
+static inline int mtd_write_oob(struct mtd_info *mtd, loff_t to,
+				struct mtd_oob_ops *ops)
+{
+	return mtd->write_oob(mtd, to, ops);
+}
+
+static inline void mtd_sync(struct mtd_info *mtd)
+{
+	if (mtd->sync)
+		mtd->sync(mtd);
+}
+#endif
+
 #endif
--- a/fs/yaffs2/yaffs_mtdif.c
+++ b/fs/yaffs2/yaffs_mtdif.c
@@ -41,7 +41,7 @@ int nandmtd_EraseBlockInNAND(yaffs_dev_t
 	ei.callback = NULL;
 	ei.priv = (u_long) dev;
 
-	retval = mtd->erase(mtd, &ei);
+	retval = mtd_erase(mtd, &ei);
 
 	if (retval == 0)
 		return YAFFS_OK;