diff --git a/drivers/mtd/inftlcore.c b/drivers/mtd/inftlcore.c
index a1b2de6..d2f54c0 100644
--- a/drivers/mtd/inftlcore.c
+++ b/drivers/mtd/inftlcore.c
@@ -163,10 +163,9 @@
 	ops.ooblen = len;
 	ops.oobbuf = buf;
 	ops.datbuf = NULL;
-	ops.len = len;
 
 	res = mtd->read_oob(mtd, offs & ~(mtd->writesize - 1), &ops);
-	*retlen = ops.retlen;
+	*retlen = ops.oobretlen;
 	return res;
 }
 
@@ -184,10 +183,9 @@
 	ops.ooblen = len;
 	ops.oobbuf = buf;
 	ops.datbuf = NULL;
-	ops.len = len;
 
 	res = mtd->write_oob(mtd, offs & ~(mtd->writesize - 1), &ops);
-	*retlen = ops.retlen;
+	*retlen = ops.oobretlen;
 	return res;
 }
 
diff --git a/drivers/mtd/mtdchar.c b/drivers/mtd/mtdchar.c
index 866c8e0..07618f5 100644
--- a/drivers/mtd/mtdchar.c
+++ b/drivers/mtd/mtdchar.c
@@ -499,13 +499,12 @@
 		if (ret)
 			return ret;
 
-		ops.len = buf.length;
 		ops.ooblen = buf.length;
 		ops.ooboffs = buf.start & (mtd->oobsize - 1);
 		ops.datbuf = NULL;
 		ops.mode = MTD_OOB_PLACE;
 
-		if (ops.ooboffs && ops.len > (mtd->oobsize - ops.ooboffs))
+		if (ops.ooboffs && ops.ooblen > (mtd->oobsize - ops.ooboffs))
 			return -EINVAL;
 
 		ops.oobbuf = kmalloc(buf.length, GFP_KERNEL);
@@ -520,7 +519,7 @@
 		buf.start &= ~(mtd->oobsize - 1);
 		ret = mtd->write_oob(mtd, buf.start, &ops);
 
-		if (copy_to_user(argp + sizeof(uint32_t), &ops.retlen,
+		if (copy_to_user(argp + sizeof(uint32_t), &ops.oobretlen,
 				 sizeof(uint32_t)))
 			ret = -EFAULT;
 
@@ -548,7 +547,6 @@
 		if (ret)
 			return ret;
 
-		ops.len = buf.length;
 		ops.ooblen = buf.length;
 		ops.ooboffs = buf.start & (mtd->oobsize - 1);
 		ops.datbuf = NULL;
@@ -564,10 +562,10 @@
 		buf.start &= ~(mtd->oobsize - 1);
 		ret = mtd->read_oob(mtd, buf.start, &ops);
 
-		if (put_user(ops.retlen, (uint32_t __user *)argp))
+		if (put_user(ops.oobretlen, (uint32_t __user *)argp))
 			ret = -EFAULT;
-		else if (ops.retlen && copy_to_user(buf.ptr, ops.oobbuf,
-						    ops.retlen))
+		else if (ops.oobretlen && copy_to_user(buf.ptr, ops.oobbuf,
+						    ops.oobretlen))
 			ret = -EFAULT;
 
 		kfree(ops.oobbuf);
diff --git a/drivers/mtd/mtdconcat.c b/drivers/mtd/mtdconcat.c
index 1fea631..cf927a8 100644
--- a/drivers/mtd/mtdconcat.c
+++ b/drivers/mtd/mtdconcat.c
@@ -247,7 +247,7 @@
 	struct mtd_oob_ops devops = *ops;
 	int i, err, ret = 0;
 
-	ops->retlen = 0;
+	ops->retlen = ops->oobretlen = 0;
 
 	for (i = 0; i < concat->num_subdev; i++) {
 		struct mtd_info *subdev = concat->subdev[i];
@@ -263,6 +263,7 @@
 
 		err = subdev->read_oob(subdev, from, &devops);
 		ops->retlen += devops.retlen;
+		ops->oobretlen += devops.oobretlen;
 
 		/* Save information about bitflips! */
 		if (unlikely(err)) {
@@ -278,14 +279,18 @@
 				return err;
 		}
 
-		devops.len = ops->len - ops->retlen;
-		if (!devops.len)
-			return ret;
-
-		if (devops.datbuf)
+		if (devops.datbuf) {
+			devops.len = ops->len - ops->retlen;
+			if (!devops.len)
+				return ret;
 			devops.datbuf += devops.retlen;
-		if (devops.oobbuf)
-			devops.oobbuf += devops.ooblen;
+		}
+		if (devops.oobbuf) {
+			devops.ooblen = ops->ooblen - ops->oobretlen;
+			if (!devops.ooblen)
+				return ret;
+			devops.oobbuf += ops->oobretlen;
+		}
 
 		from = 0;
 	}
@@ -321,14 +326,18 @@
 		if (err)
 			return err;
 
-		devops.len = ops->len - ops->retlen;
-		if (!devops.len)
-			return 0;
-
-		if (devops.datbuf)
+		if (devops.datbuf) {
+			devops.len = ops->len - ops->retlen;
+			if (!devops.len)
+				return 0;
 			devops.datbuf += devops.retlen;
-		if (devops.oobbuf)
-			devops.oobbuf += devops.ooblen;
+		}
+		if (devops.oobbuf) {
+			devops.ooblen = ops->ooblen - ops->oobretlen;
+			if (!devops.ooblen)
+				return 0;
+			devops.oobbuf += devops.oobretlen;
+		}
 		to = 0;
 	}
 	return -EINVAL;
diff --git a/drivers/mtd/mtdpart.c b/drivers/mtd/mtdpart.c
index 06a9303..a20f75f 100644
--- a/drivers/mtd/mtdpart.c
+++ b/drivers/mtd/mtdpart.c
@@ -94,7 +94,7 @@
 
 	if (from >= mtd->size)
 		return -EINVAL;
-	if (from + ops->len > mtd->size)
+	if (ops->datbuf && from + ops->len > mtd->size)
 		return -EINVAL;
 	res = part->master->read_oob(part->master, from + part->offset, ops);
 
@@ -161,7 +161,7 @@
 
 	if (to >= mtd->size)
 		return -EINVAL;
-	if (to + ops->len > mtd->size)
+	if (ops->datbuf && to + ops->len > mtd->size)
 		return -EINVAL;
 	return part->master->write_oob(part->master, to + part->offset, ops);
 }
diff --git a/drivers/mtd/nand/nand_base.c b/drivers/mtd/nand/nand_base.c
index 8df36e2..5dcb2e0 100644
--- a/drivers/mtd/nand/nand_base.c
+++ b/drivers/mtd/nand/nand_base.c
@@ -897,12 +897,11 @@
  * @chip:	nand chip structure
  * @oob:	oob destination address
  * @ops:	oob ops structure
+ * @len:	size of oob to transfer
  */
 static uint8_t *nand_transfer_oob(struct nand_chip *chip, uint8_t *oob,
-				  struct mtd_oob_ops *ops)
+				  struct mtd_oob_ops *ops, size_t len)
 {
-	size_t len = ops->ooblen;
-
 	switch(ops->mode) {
 
 	case MTD_OOB_PLACE:
@@ -960,6 +959,7 @@
 	int sndcmd = 1;
 	int ret = 0;
 	uint32_t readlen = ops->len;
+	uint32_t oobreadlen = ops->ooblen;
 	uint8_t *bufpoi, *oob, *buf;
 
 	stats = mtd->ecc_stats;
@@ -1006,10 +1006,17 @@
 
 			if (unlikely(oob)) {
 				/* Raw mode does data:oob:data:oob */
-				if (ops->mode != MTD_OOB_RAW)
-					oob = nand_transfer_oob(chip, oob, ops);
-				else
-					buf = nand_transfer_oob(chip, buf, ops);
+				if (ops->mode != MTD_OOB_RAW) {
+					int toread = min(oobreadlen,
+						chip->ecc.layout->oobavail);
+					if (toread) {
+						oob = nand_transfer_oob(chip,
+							oob, ops, toread);
+						oobreadlen -= toread;
+					}
+				} else
+					buf = nand_transfer_oob(chip,
+						buf, ops, mtd->oobsize);
 			}
 
 			if (!(chip->options & NAND_NO_READRDY)) {
@@ -1056,6 +1063,8 @@
 	}
 
 	ops->retlen = ops->len - (size_t) readlen;
+	if (oob)
+		ops->oobretlen = ops->ooblen - oobreadlen;
 
 	if (ret)
 		return ret;
@@ -1256,12 +1265,18 @@
 	int page, realpage, chipnr, sndcmd = 1;
 	struct nand_chip *chip = mtd->priv;
 	int blkcheck = (1 << (chip->phys_erase_shift - chip->page_shift)) - 1;
-	int readlen = ops->len;
+	int readlen = ops->ooblen;
+	int len;
 	uint8_t *buf = ops->oobbuf;
 
 	DEBUG(MTD_DEBUG_LEVEL3, "nand_read_oob: from = 0x%08Lx, len = %i\n",
 	      (unsigned long long)from, readlen);
 
+	if (ops->mode == MTD_OOB_RAW)
+		len = mtd->oobsize;
+	else
+		len = chip->ecc.layout->oobavail;
+
 	chipnr = (int)(from >> chip->chip_shift);
 	chip->select_chip(mtd, chipnr);
 
@@ -1271,7 +1286,9 @@
 
 	while(1) {
 		sndcmd = chip->ecc.read_oob(mtd, chip, page, sndcmd);
-		buf = nand_transfer_oob(chip, buf, ops);
+
+		len = min(len, readlen);
+		buf = nand_transfer_oob(chip, buf, ops, len);
 
 		if (!(chip->options & NAND_NO_READRDY)) {
 			/*
@@ -1286,7 +1303,7 @@
 				nand_wait_ready(mtd);
 		}
 
-		readlen -= ops->ooblen;
+		readlen -= len;
 		if (!readlen)
 			break;
 
@@ -1308,7 +1325,7 @@
 			sndcmd = 1;
 	}
 
-	ops->retlen = ops->len;
+	ops->oobretlen = ops->ooblen;
 	return 0;
 }
 
@@ -1329,7 +1346,7 @@
 	ops->retlen = 0;
 
 	/* Do not allow reads past end of device */
-	if ((from + ops->len) > mtd->size) {
+	if (ops->datbuf && (from + ops->len) > mtd->size) {
 		DEBUG(MTD_DEBUG_LEVEL0, "nand_read_oob: "
 		      "Attempt read beyond end of device\n");
 		return -EINVAL;
@@ -1654,6 +1671,8 @@
 	}
 
 	ops->retlen = ops->len - writelen;
+	if (unlikely(oob))
+		ops->oobretlen = ops->ooblen;
 	return ret;
 }
 
@@ -1709,10 +1728,10 @@
 	struct nand_chip *chip = mtd->priv;
 
 	DEBUG(MTD_DEBUG_LEVEL3, "nand_write_oob: to = 0x%08x, len = %i\n",
-	      (unsigned int)to, (int)ops->len);
+	      (unsigned int)to, (int)ops->ooblen);
 
 	/* Do not allow write past end of page */
-	if ((ops->ooboffs + ops->len) > mtd->oobsize) {
+	if ((ops->ooboffs + ops->ooblen) > mtd->oobsize) {
 		DEBUG(MTD_DEBUG_LEVEL0, "nand_write_oob: "
 		      "Attempt to write past end of page\n");
 		return -EINVAL;
@@ -1748,7 +1767,7 @@
 	if (status)
 		return status;
 
-	ops->retlen = ops->len;
+	ops->oobretlen = ops->ooblen;
 
 	return 0;
 }
@@ -1768,7 +1787,7 @@
 	ops->retlen = 0;
 
 	/* Do not allow writes past end of device */
-	if ((to + ops->len) > mtd->size) {
+	if (ops->datbuf && (to + ops->len) > mtd->size) {
 		DEBUG(MTD_DEBUG_LEVEL0, "nand_read_oob: "
 		      "Attempt read beyond end of device\n");
 		return -EINVAL;
diff --git a/drivers/mtd/nand/nand_bbt.c b/drivers/mtd/nand/nand_bbt.c
index 9402653..4e74fe9 100644
--- a/drivers/mtd/nand/nand_bbt.c
+++ b/drivers/mtd/nand/nand_bbt.c
@@ -333,7 +333,6 @@
 	struct mtd_oob_ops ops;
 	int j, ret;
 
-	ops.len = mtd->oobsize;
 	ops.ooblen = mtd->oobsize;
 	ops.oobbuf = buf;
 	ops.ooboffs = 0;
@@ -676,10 +675,10 @@
 				       "bad block table\n");
 			}
 			/* Read oob data */
-			ops.len = (len >> this->page_shift) * mtd->oobsize;
+			ops.ooblen = (len >> this->page_shift) * mtd->oobsize;
 			ops.oobbuf = &buf[len];
 			res = mtd->read_oob(mtd, to + mtd->writesize, &ops);
-			if (res < 0 || ops.retlen != ops.len)
+			if (res < 0 || ops.oobretlen != ops.ooblen)
 				goto outerr;
 
 			/* Calc the byte offset in the buffer */
diff --git a/drivers/mtd/nftlcore.c b/drivers/mtd/nftlcore.c
index d974ada..f4d3854 100644
--- a/drivers/mtd/nftlcore.c
+++ b/drivers/mtd/nftlcore.c
@@ -147,10 +147,9 @@
 	ops.ooblen = len;
 	ops.oobbuf = buf;
 	ops.datbuf = NULL;
-	ops.len = len;
 
 	res = mtd->read_oob(mtd, offs & ~(mtd->writesize - 1), &ops);
-	*retlen = ops.retlen;
+	*retlen = ops.oobretlen;
 	return res;
 }
 
@@ -168,10 +167,9 @@
 	ops.ooblen = len;
 	ops.oobbuf = buf;
 	ops.datbuf = NULL;
-	ops.len = len;
 
 	res = mtd->write_oob(mtd, offs & ~(mtd->writesize - 1), &ops);
-	*retlen = ops.retlen;
+	*retlen = ops.oobretlen;
 	return res;
 }
 
diff --git a/drivers/mtd/ssfdc.c b/drivers/mtd/ssfdc.c
index 79d3bb6..e834cc1 100644
--- a/drivers/mtd/ssfdc.c
+++ b/drivers/mtd/ssfdc.c
@@ -172,13 +172,12 @@
 
 	ops.mode = MTD_OOB_RAW;
 	ops.ooboffs = 0;
-	ops.ooblen = mtd->oobsize;
-	ops.len = OOB_SIZE;
+	ops.ooblen = OOB_SIZE;
 	ops.oobbuf = buf;
 	ops.datbuf = NULL;
 
 	ret = mtd->read_oob(mtd, offs, &ops);
-	if (ret < 0 || ops.retlen != OOB_SIZE)
+	if (ret < 0 || ops.oobretlen != OOB_SIZE)
 		return -1;
 
 	return 0;