diff -ruN mtd-original/drivers/mtd/mtdpart.c mtd-work/drivers/mtd/mtdpart.c
--- mtd-original/drivers/mtd/mtdpart.c	2004-03-30 01:00:17.000000000 +0300
+++ mtd-work/drivers/mtd/mtdpart.c	2004-05-06 10:00:40.449248560 +0300
@@ -485,6 +485,9 @@
 				parts[i].name);
 		}
 
+		/* copy oobinfo from master */ 
+		memcpy(&slave->mtd.oobinfo, &master->oobinfo, sizeof(slave->mtd.oobinfo));
+
 		if(parts[i].mtdp)
 		{	/* store the object pointer (caller may or may not register it */
 			*parts[i].mtdp = &slave->mtd;
diff -ruN mtd-original/drivers/mtd/nand/nand.c mtd-work/drivers/mtd/nand/nand.c
--- mtd-original/drivers/mtd/nand/nand.c	2004-05-05 01:00:35.000000000 +0300
+++ mtd-work/drivers/mtd/nand/nand.c	2004-05-06 10:01:55.231879872 +0300
@@ -1163,7 +1163,7 @@
 	/* Check, if the buffer must be filled with ff again */
 	if (this->oobdirty) {	
 		memset (this->oob_buf, 0xff, 
-			mtd->oobsize * (mtd->erasesize / mtd->oobblock));
+			mtd->oobsize << (this->erase_shift - this->page_shift));
 		this->oobdirty = 0;
 	}	
 	
@@ -1671,7 +1671,7 @@
 	chipnr = (int)((unsigned long)instr->addr / this->chipsize);
 
 	/* Calculate pages in each block */
-	pages_per_block = mtd->erasesize / mtd->oobblock;
+	pages_per_block = 1 << (this->erase_shift - this->page_shift);
 
 	/* Select the NAND device */
 	this->select_chip(mtd, chipnr);
@@ -1941,6 +1941,7 @@
 		
 		/* Calculate the address shift from the page size */	
 		this->page_shift = ffs(mtd->oobblock) - 1;
+		this->erase_shift = ffs(mtd->erasesize) - 1;
 
 		/* Set the bad block position */
 		this->badblockpos = mtd->oobblock > 512 ? 
@@ -1994,7 +1995,7 @@
 	/* Convert chipsize to number of pages per chip -1. */
 	this->pagemask = (this->chipsize >> this->page_shift) - 1;
 	/* Preset the internal oob buffer */
-	memset(this->oob_buf, 0xff, mtd->oobsize * (mtd->erasesize / mtd->oobblock));	
+	memset(this->oob_buf, 0xff, mtd->oobsize << (this->erase_shift - this->page_shift));
 
 	/* If no default placement scheme is given, select an
 	 * appropriate one */
@@ -2120,6 +2121,10 @@
 	mtd->resume = NULL;
 	mtd->block_isbad = nand_block_isbad;
 	mtd->block_markbad = nand_block_markbad;
+
+	/* and make the autooob the default one */
+	memcpy(&mtd->oobinfo, this->autooob, sizeof(mtd->oobinfo));
+
 	mtd->owner = THIS_MODULE;
 
 	/* Return happy */
diff -ruN mtd-original/include/linux/mtd/nand.h mtd-work/include/linux/mtd/nand.h
--- mtd-original/include/linux/mtd/nand.h	2004-04-17 01:00:05.000000000 +0300
+++ mtd-work/include/linux/mtd/nand.h	2004-05-06 09:59:30.404896920 +0300
@@ -235,6 +235,7 @@
 	wait_queue_head_t wq;
 	nand_state_t 	state;
 	int 		page_shift;
+	int		erase_shift;
 	u_char 		*data_buf;
 	u_char		*oob_buf;
 	int		oobdirty;