25 files changed, 238 insertions, 925 deletions

diff --git a/drivers/mtd/chips/map_rom.c b/drivers/mtd/chips/map_rom.c
index 821d0ed6bae..c76d6e5f47e 100644
--- a/drivers/mtd/chips/map_rom.c
+++ b/drivers/mtd/chips/map_rom.c
@@ -19,6 +19,7 @@ static int maprom_read (struct mtd_info *, loff_t, size_t, size_t *, u_char *);
 static int maprom_write (struct mtd_info *, loff_t, size_t, size_t *, const u_char *);
 static void maprom_nop (struct mtd_info *);
 static struct mtd_info *map_rom_probe(struct map_info *map);
+static int maprom_erase (struct mtd_info *mtd, struct erase_info *info);
 
 static struct mtd_chip_driver maprom_chipdrv = {
 	.probe	= map_rom_probe,
@@ -42,6 +43,7 @@ static struct mtd_info *map_rom_probe(struct map_info *map)
 	mtd->read = maprom_read;
 	mtd->write = maprom_write;
 	mtd->sync = maprom_nop;
+	mtd->erase = maprom_erase;
 	mtd->flags = MTD_CAP_ROM;
 	mtd->erasesize = map->size;
 	mtd->writesize = 1;
@@ -71,6 +73,12 @@ static int maprom_write (struct mtd_info *mtd, loff_t to, size_t len, size_t *re
 	return -EIO;
 }
 
+static int maprom_erase (struct mtd_info *mtd, struct erase_info *info)
+{
+	/* We do our best 8) */
+	return -EROFS;
+}
+
 static int __init map_rom_init(void)
 {
 	register_mtd_chip_driver(&maprom_chipdrv);
diff --git a/drivers/mtd/devices/Kconfig b/drivers/mtd/devices/Kconfig
index bc33200535f..6fde0a2e356 100644
--- a/drivers/mtd/devices/Kconfig
+++ b/drivers/mtd/devices/Kconfig
@@ -120,13 +120,6 @@ config MTD_PHRAM
 	  doesn't have access to, memory beyond the mem=xxx limit, nvram,
 	  memory on the video card, etc...
 
-config MTD_PS3VRAM
-	tristate "PS3 video RAM"
-	depends on FB_PS3
-	help
-	  This driver allows you to use excess PS3 video RAM as volatile
-	  storage or system swap.
-
 config MTD_LART
 	tristate "28F160xx flash driver for LART"
 	depends on SA1100_LART
diff --git a/drivers/mtd/devices/Makefile b/drivers/mtd/devices/Makefile
index e51521df4e4..0993d5cf392 100644
--- a/drivers/mtd/devices/Makefile
+++ b/drivers/mtd/devices/Makefile
@@ -16,4 +16,3 @@ obj-$(CONFIG_MTD_LART)		+= lart.o
 obj-$(CONFIG_MTD_BLOCK2MTD)	+= block2mtd.o
 obj-$(CONFIG_MTD_DATAFLASH)	+= mtd_dataflash.o
 obj-$(CONFIG_MTD_M25P80)	+= m25p80.o
-obj-$(CONFIG_MTD_PS3VRAM)	+= ps3vram.o
diff --git a/drivers/mtd/devices/mtd_dataflash.c b/drivers/mtd/devices/mtd_dataflash.c
index d44f741ae22..6d9f810565c 100644
--- a/drivers/mtd/devices/mtd_dataflash.c
+++ b/drivers/mtd/devices/mtd_dataflash.c
@@ -821,7 +821,8 @@ static struct flash_info *__devinit jedec_probe(struct spi_device *spi)
 					if (!(info->flags & IS_POW2PS))
 						return info;
 				}
-			}
+			} else
+				return info;
 		}
 	}
 
diff --git a/drivers/mtd/devices/ps3vram.c b/drivers/mtd/devices/ps3vram.c
deleted file mode 100644
index d21e9beb7ed..00000000000
--- a/drivers/mtd/devices/ps3vram.c
+++ /dev/null
@@ -1,768 +0,0 @@
-/**
- * ps3vram - Use extra PS3 video ram as MTD block device.
- *
- * Copyright (c) 2007-2008 Jim Paris <jim@jtan.com>
- * Added support RSX DMA Vivien Chappelier <vivien.chappelier@free.fr>
- */
-
-#include <linux/io.h>
-#include <linux/mm.h>
-#include <linux/init.h>
-#include <linux/kernel.h>
-#include <linux/list.h>
-#include <linux/module.h>
-#include <linux/moduleparam.h>
-#include <linux/slab.h>
-#include <linux/version.h>
-#include <linux/gfp.h>
-#include <linux/delay.h>
-#include <linux/mtd/mtd.h>
-
-#include <asm/lv1call.h>
-#include <asm/ps3.h>
-
-#define DEVICE_NAME		"ps3vram"
-
-#define XDR_BUF_SIZE (2 * 1024 * 1024) /* XDR buffer (must be 1MiB aligned) */
-#define XDR_IOIF 0x0c000000
-
-#define FIFO_BASE XDR_IOIF
-#define FIFO_SIZE (64 * 1024)
-
-#define DMA_PAGE_SIZE (4 * 1024)
-
-#define CACHE_PAGE_SIZE (256 * 1024)
-#define CACHE_PAGE_COUNT ((XDR_BUF_SIZE - FIFO_SIZE) / CACHE_PAGE_SIZE)
-
-#define CACHE_OFFSET CACHE_PAGE_SIZE
-#define FIFO_OFFSET 0
-
-#define CTRL_PUT 0x10
-#define CTRL_GET 0x11
-#define CTRL_TOP 0x15
-
-#define UPLOAD_SUBCH	1
-#define DOWNLOAD_SUBCH	2
-
-#define NV_MEMORY_TO_MEMORY_FORMAT_OFFSET_IN	0x0000030c
-#define NV_MEMORY_TO_MEMORY_FORMAT_NOTIFY	0x00000104
-
-#define L1GPU_CONTEXT_ATTRIBUTE_FB_BLIT 0x601
-
-struct mtd_info ps3vram_mtd;
-
-#define CACHE_PAGE_PRESENT 1
-#define CACHE_PAGE_DIRTY   2
-
-struct ps3vram_tag {
-	unsigned int address;
-	unsigned int flags;
-};
-
-struct ps3vram_cache {
-	unsigned int page_count;
-	unsigned int page_size;
-	struct ps3vram_tag *tags;
-};
-
-struct ps3vram_priv {
-	u64 memory_handle;
-	u64 context_handle;
-	u32 *ctrl;
-	u32 *reports;
-	u8 __iomem *ddr_base;
-	u8 *xdr_buf;
-
-	u32 *fifo_base;
-	u32 *fifo_ptr;
-
-	struct device *dev;
-	struct ps3vram_cache cache;
-
-	/* Used to serialize cache/DMA operations */
-	struct mutex lock;
-};
-
-#define DMA_NOTIFIER_HANDLE_BASE 0x66604200 /* first DMA notifier handle */
-#define DMA_NOTIFIER_OFFSET_BASE 0x1000     /* first DMA notifier offset */
-#define DMA_NOTIFIER_SIZE        0x40
-#define NOTIFIER 7	/* notifier used for completion report */
-
-/* A trailing '-' means to subtract off ps3fb_videomemory.size */
-char *size = "256M-";
-module_param(size, charp, 0);
-MODULE_PARM_DESC(size, "memory size");
-
-static u32 *ps3vram_get_notifier(u32 *reports, int notifier)
-{
-	return (void *) reports +
-		DMA_NOTIFIER_OFFSET_BASE +
-		DMA_NOTIFIER_SIZE * notifier;
-}
-
-static void ps3vram_notifier_reset(struct mtd_info *mtd)
-{
-	int i;
-
-	struct ps3vram_priv *priv = mtd->priv;
-	u32 *notify = ps3vram_get_notifier(priv->reports, NOTIFIER);
-	for (i = 0; i < 4; i++)
-		notify[i] = 0xffffffff;
-}
-
-static int ps3vram_notifier_wait(struct mtd_info *mtd, unsigned int timeout_ms)
-{
-	struct ps3vram_priv *priv = mtd->priv;
-	u32 *notify = ps3vram_get_notifier(priv->reports, NOTIFIER);
-	unsigned long timeout = jiffies + msecs_to_jiffies(timeout_ms);
-
-	do {
-		if (!notify[3])
-			return 0;
-		msleep(1);
-	} while (time_before(jiffies, timeout));
-
-	return -ETIMEDOUT;
-}
-
-static void ps3vram_init_ring(struct mtd_info *mtd)
-{
-	struct ps3vram_priv *priv = mtd->priv;
-
-	priv->ctrl[CTRL_PUT] = FIFO_BASE + FIFO_OFFSET;
-	priv->ctrl[CTRL_GET] = FIFO_BASE + FIFO_OFFSET;
-}
-
-static int ps3vram_wait_ring(struct mtd_info *mtd, unsigned int timeout_ms)
-{
-	struct ps3vram_priv *priv = mtd->priv;
-	unsigned long timeout = jiffies + msecs_to_jiffies(timeout_ms);
-
-	do {
-		if (priv->ctrl[CTRL_PUT] == priv->ctrl[CTRL_GET])
-			return 0;
-		msleep(1);
-	} while (time_before(jiffies, timeout));
-
-	dev_dbg(priv->dev, "%s:%d: FIFO timeout (%08x/%08x/%08x)\n", __func__,
-		__LINE__, priv->ctrl[CTRL_PUT], priv->ctrl[CTRL_GET],
-		priv->ctrl[CTRL_TOP]);
-
-	return -ETIMEDOUT;
-}
-
-static void ps3vram_out_ring(struct ps3vram_priv *priv, u32 data)
-{
-	*(priv->fifo_ptr)++ = data;
-}
-
-static void ps3vram_begin_ring(struct ps3vram_priv *priv, u32 chan,
-				      u32 tag, u32 size)
-{
-	ps3vram_out_ring(priv, (size << 18) | (chan << 13) | tag);
-}
-
-static void ps3vram_rewind_ring(struct mtd_info *mtd)
-{
-	struct ps3vram_priv *priv = mtd->priv;
-	u64 status;
-
-	ps3vram_out_ring(priv, 0x20000000 | (FIFO_BASE + FIFO_OFFSET));
-
-	priv->ctrl[CTRL_PUT] = FIFO_BASE + FIFO_OFFSET;
-
-	/* asking the HV for a blit will kick the fifo */
-	status = lv1_gpu_context_attribute(priv->context_handle,
-					   L1GPU_CONTEXT_ATTRIBUTE_FB_BLIT,
-					   0, 0, 0, 0);
-	if (status)
-		dev_err(priv->dev, "%s:%d: lv1_gpu_context_attribute failed\n",
-			__func__, __LINE__);
-
-	priv->fifo_ptr = priv->fifo_base;
-}
-
-static void ps3vram_fire_ring(struct mtd_info *mtd)
-{
-	struct ps3vram_priv *priv = mtd->priv;
-	u64 status;
-
-	mutex_lock(&ps3_gpu_mutex);
-
-	priv->ctrl[CTRL_PUT] = FIFO_BASE + FIFO_OFFSET +
-		(priv->fifo_ptr - priv->fifo_base) * sizeof(u32);
-
-	/* asking the HV for a blit will kick the fifo */
-	status = lv1_gpu_context_attribute(priv->context_handle,
-					   L1GPU_CONTEXT_ATTRIBUTE_FB_BLIT,
-					   0, 0, 0, 0);
-	if (status)
-		dev_err(priv->dev, "%s:%d: lv1_gpu_context_attribute failed\n",
-			__func__, __LINE__);
-
-	if ((priv->fifo_ptr - priv->fifo_base) * sizeof(u32) >
-		FIFO_SIZE - 1024) {
-		dev_dbg(priv->dev, "%s:%d: fifo full, rewinding\n", __func__,
-			__LINE__);
-		ps3vram_wait_ring(mtd, 200);
-		ps3vram_rewind_ring(mtd);
-	}
-
-	mutex_unlock(&ps3_gpu_mutex);
-}
-
-static void ps3vram_bind(struct mtd_info *mtd)
-{
-	struct ps3vram_priv *priv = mtd->priv;
-
-	ps3vram_begin_ring(priv, UPLOAD_SUBCH, 0, 1);
-	ps3vram_out_ring(priv, 0x31337303);
-	ps3vram_begin_ring(priv, UPLOAD_SUBCH, 0x180, 3);
-	ps3vram_out_ring(priv, DMA_NOTIFIER_HANDLE_BASE + NOTIFIER);
-	ps3vram_out_ring(priv, 0xfeed0001);	/* DMA system RAM instance */
-	ps3vram_out_ring(priv, 0xfeed0000);     /* DMA video RAM instance */
-
-	ps3vram_begin_ring(priv, DOWNLOAD_SUBCH, 0, 1);
-	ps3vram_out_ring(priv, 0x3137c0de);
-	ps3vram_begin_ring(priv, DOWNLOAD_SUBCH, 0x180, 3);
-	ps3vram_out_ring(priv, DMA_NOTIFIER_HANDLE_BASE + NOTIFIER);
-	ps3vram_out_ring(priv, 0xfeed0000);	/* DMA video RAM instance */
-	ps3vram_out_ring(priv, 0xfeed0001);	/* DMA system RAM instance */
-
-	ps3vram_fire_ring(mtd);
-}
-
-static int ps3vram_upload(struct mtd_info *mtd, unsigned int src_offset,
-			  unsigned int dst_offset, int len, int count)
-{
-	struct ps3vram_priv *priv = mtd->priv;
-
-	ps3vram_begin_ring(priv, UPLOAD_SUBCH,
-			   NV_MEMORY_TO_MEMORY_FORMAT_OFFSET_IN, 8);
-	ps3vram_out_ring(priv, XDR_IOIF + src_offset);
-	ps3vram_out_ring(priv, dst_offset);
-	ps3vram_out_ring(priv, len);
-	ps3vram_out_ring(priv, len);
-	ps3vram_out_ring(priv, len);
-	ps3vram_out_ring(priv, count);
-	ps3vram_out_ring(priv, (1 << 8) | 1);
-	ps3vram_out_ring(priv, 0);
-
-	ps3vram_notifier_reset(mtd);
-	ps3vram_begin_ring(priv, UPLOAD_SUBCH,
-			   NV_MEMORY_TO_MEMORY_FORMAT_NOTIFY, 1);
-	ps3vram_out_ring(priv, 0);
-	ps3vram_begin_ring(priv, UPLOAD_SUBCH, 0x100, 1);
-	ps3vram_out_ring(priv, 0);
-	ps3vram_fire_ring(mtd);
-	if (ps3vram_notifier_wait(mtd, 200) < 0) {
-		dev_dbg(priv->dev, "%s:%d: notifier timeout\n", __func__,
-			__LINE__);
-		return -1;
-	}
-
-	return 0;
-}
-
-static int ps3vram_download(struct mtd_info *mtd, unsigned int src_offset,
-			    unsigned int dst_offset, int len, int count)
-{
-	struct ps3vram_priv *priv = mtd->priv;
-
-	ps3vram_begin_ring(priv, DOWNLOAD_SUBCH,
-			   NV_MEMORY_TO_MEMORY_FORMAT_OFFSET_IN, 8);
-	ps3vram_out_ring(priv, src_offset);
-	ps3vram_out_ring(priv, XDR_IOIF + dst_offset);
-	ps3vram_out_ring(priv, len);
-	ps3vram_out_ring(priv, len);
-	ps3vram_out_ring(priv, len);
-	ps3vram_out_ring(priv, count);
-	ps3vram_out_ring(priv, (1 << 8) | 1);
-	ps3vram_out_ring(priv, 0);
-
-	ps3vram_notifier_reset(mtd);
-	ps3vram_begin_ring(priv, DOWNLOAD_SUBCH,
-			   NV_MEMORY_TO_MEMORY_FORMAT_NOTIFY, 1);
-	ps3vram_out_ring(priv, 0);
-	ps3vram_begin_ring(priv, DOWNLOAD_SUBCH, 0x100, 1);
-	ps3vram_out_ring(priv, 0);
-	ps3vram_fire_ring(mtd);
-	if (ps3vram_notifier_wait(mtd, 200) < 0) {
-		dev_dbg(priv->dev, "%s:%d: notifier timeout\n", __func__,
-			__LINE__);
-		return -1;
-	}
-
-	return 0;
-}
-
-static void ps3vram_cache_evict(struct mtd_info *mtd, int entry)
-{
-	struct ps3vram_priv *priv = mtd->priv;
-	struct ps3vram_cache *cache = &priv->cache;
-
-	if (cache->tags[entry].flags & CACHE_PAGE_DIRTY) {
-		dev_dbg(priv->dev, "%s:%d: flushing %d : 0x%08x\n", __func__,
-			__LINE__, entry, cache->tags[entry].address);
-		if (ps3vram_upload(mtd,
-				   CACHE_OFFSET + entry * cache->page_size,
-				   cache->tags[entry].address,
-				   DMA_PAGE_SIZE,
-				   cache->page_size / DMA_PAGE_SIZE) < 0) {
-			dev_dbg(priv->dev, "%s:%d: failed to upload from "
-				"0x%x to 0x%x size 0x%x\n", __func__, __LINE__,
-				entry * cache->page_size,
-				cache->tags[entry].address, cache->page_size);
-		}
-		cache->tags[entry].flags &= ~CACHE_PAGE_DIRTY;
-	}
-}
-
-static void ps3vram_cache_load(struct mtd_info *mtd, int entry,
-			       unsigned int address)
-{
-	struct ps3vram_priv *priv = mtd->priv;
-	struct ps3vram_cache *cache = &priv->cache;
-
-	dev_dbg(priv->dev, "%s:%d: fetching %d : 0x%08x\n", __func__, __LINE__,
-		entry, address);
-	if (ps3vram_download(mtd,
-			     address,
-			     CACHE_OFFSET + entry * cache->page_size,
-			     DMA_PAGE_SIZE,
-			     cache->page_size / DMA_PAGE_SIZE) < 0) {
-		dev_err(priv->dev, "%s:%d: failed to download from "
-			"0x%x to 0x%x size 0x%x\n", __func__, __LINE__, address,
-			entry * cache->page_size, cache->page_size);
-	}
-
-	cache->tags[entry].address = address;
-	cache->tags[entry].flags |= CACHE_PAGE_PRESENT;
-}
-
-
-static void ps3vram_cache_flush(struct mtd_info *mtd)
-{
-	struct ps3vram_priv *priv = mtd->priv;
-	struct ps3vram_cache *cache = &priv->cache;
-	int i;
-
-	dev_dbg(priv->dev, "%s:%d: FLUSH\n", __func__, __LINE__);
-	for (i = 0; i < cache->page_count; i++) {
-		ps3vram_cache_evict(mtd, i);
-		cache->tags[i].flags = 0;
-	}
-}
-
-static unsigned int ps3vram_cache_match(struct mtd_info *mtd, loff_t address)
-{
-	struct ps3vram_priv *priv = mtd->priv;
-	struct ps3vram_cache *cache = &priv->cache;
-	unsigned int base;
-	unsigned int offset;
-	int i;
-	static int counter;
-
-	offset = (unsigned int) (address & (cache->page_size - 1));
-	base = (unsigned int) (address - offset);
-
-	/* fully associative check */
-	for (i = 0; i < cache->page_count; i++) {
-		if ((cache->tags[i].flags & CACHE_PAGE_PRESENT) &&
-		    cache->tags[i].address == base) {
-			dev_dbg(priv->dev, "%s:%d: found entry %d : 0x%08x\n",
-				__func__, __LINE__, i, cache->tags[i].address);
-			return i;
-		}
-	}
-
-	/* choose a random entry */
-	i = (jiffies + (counter++)) % cache->page_count;
-	dev_dbg(priv->dev, "%s:%d: using entry %d\n", __func__, __LINE__, i);
-
-	ps3vram_cache_evict(mtd, i);
-	ps3vram_cache_load(mtd, i, base);
-
-	return i;
-}
-
-static int ps3vram_cache_init(struct mtd_info *mtd)
-{
-	struct ps3vram_priv *priv = mtd->priv;
-
-	priv->cache.page_count = CACHE_PAGE_COUNT;
-	priv->cache.page_size = CACHE_PAGE_SIZE;
-	priv->cache.tags = kzalloc(sizeof(struct ps3vram_tag) *
-				   CACHE_PAGE_COUNT, GFP_KERNEL);
-	if (priv->cache.tags == NULL) {
-		dev_err(priv->dev, "%s:%d: could not allocate cache tags\n",
-			__func__, __LINE__);
-		return -ENOMEM;
-	}
-
-	dev_info(priv->dev, "created ram cache: %d entries, %d KiB each\n",
-		CACHE_PAGE_COUNT, CACHE_PAGE_SIZE / 1024);
-
-	return 0;
-}
-
-static void ps3vram_cache_cleanup(struct mtd_info *mtd)
-{
-	struct ps3vram_priv *priv = mtd->priv;
-
-	ps3vram_cache_flush(mtd);
-	kfree(priv->cache.tags);
-}
-
-static int ps3vram_erase(struct mtd_info *mtd, struct erase_info *instr)
-{
-	struct ps3vram_priv *priv = mtd->priv;
-
-	if (instr->addr + instr->len > mtd->size)
-		return -EINVAL;
-
-	mutex_lock(&priv->lock);
-
-	ps3vram_cache_flush(mtd);
-
-	/* Set bytes to 0xFF */
-	memset_io(priv->ddr_base + instr->addr, 0xFF, instr->len);
-
-	mutex_unlock(&priv->lock);
-
-	instr->state = MTD_ERASE_DONE;
-	mtd_erase_callback(instr);
-
-	return 0;
-}
-
-static int ps3vram_read(struct mtd_info *mtd, loff_t from, size_t len,
-			size_t *retlen, u_char *buf)
-{
-	struct ps3vram_priv *priv = mtd->priv;
-	unsigned int cached, count;
-
-	dev_dbg(priv->dev, "%s:%d: from=0x%08x len=0x%zx\n", __func__, __LINE__,
-		(unsigned int)from, len);
-
-	if (from >= mtd->size)
-		return -EINVAL;
-
-	if (len > mtd->size - from)
-		len = mtd->size - from;
-
-	/* Copy from vram to buf */
-	count = len;
-	while (count) {
-		unsigned int offset, avail;
-		unsigned int entry;
-
-		offset = (unsigned int) (from & (priv->cache.page_size - 1));
-		avail  = priv->cache.page_size - offset;
-
-		mutex_lock(&priv->lock);
-
-		entry = ps3vram_cache_match(mtd, from);
-		cached = CACHE_OFFSET + entry * priv->cache.page_size + offset;
-
-		dev_dbg(priv->dev, "%s:%d: from=%08x cached=%08x offset=%08x "
-			"avail=%08x count=%08x\n", __func__, __LINE__,
-			(unsigned int)from, cached, offset, avail, count);
-
-		if (avail > count)
-			avail = count;
-		memcpy(buf, priv->xdr_buf + cached, avail);
-
-		mutex_unlock(&priv->lock);
-
-		buf += avail;
-		count -= avail;
-		from += avail;
-	}
-
-	*retlen = len;
-	return 0;
-}
-
-static int ps3vram_write(struct mtd_info *mtd, loff_t to, size_t len,
-			 size_t *retlen, const u_char *buf)
-{
-	struct ps3vram_priv *priv = mtd->priv;
-	unsigned int cached, count;
-
-	if (to >= mtd->size)
-		return -EINVAL;
-
-	if (len > mtd->size - to)
-		len = mtd->size - to;
-
-	/* Copy from buf to vram */
-	count = len;
-	while (count) {
-		unsigned int offset, avail;
-		unsigned int entry;
-
-		offset = (unsigned int) (to & (priv->cache.page_size - 1));
-		avail  = priv->cache.page_size - offset;
-
-		mutex_lock(&priv->lock);
-
-		entry = ps3vram_cache_match(mtd, to);
-		cached = CACHE_OFFSET + entry * priv->cache.page_size + offset;
-
-		dev_dbg(priv->dev, "%s:%d: to=%08x cached=%08x offset=%08x "
-			"avail=%08x count=%08x\n", __func__, __LINE__,
-			(unsigned int)to, cached, offset, avail, count);
-
-		if (avail > count)
-			avail = count;
-		memcpy(priv->xdr_buf + cached, buf, avail);
-
-		priv->cache.tags[entry].flags |= CACHE_PAGE_DIRTY;
-
-		mutex_unlock(&priv->lock);
-
-		buf += avail;
-		count -= avail;
-		to += avail;
-	}
-
-	*retlen = len;
-	return 0;
-}
-
-static int __devinit ps3vram_probe(struct ps3_system_bus_device *dev)
-{
-	struct ps3vram_priv *priv;
-	int status;
-	u64 ddr_lpar;
-	u64 ctrl_lpar;
-	u64 info_lpar;
-	u64 reports_lpar;
-	u64 ddr_size;
-	u64 reports_size;
-	int ret = -ENOMEM;
-	char *rest;
-
-	ret = -EIO;
-	ps3vram_mtd.priv = kzalloc(sizeof(struct ps3vram_priv), GFP_KERNEL);
-	if (!ps3vram_mtd.priv)
-		goto out;
-	priv = ps3vram_mtd.priv;
-
-	mutex_init(&priv->lock);
-	priv->dev = &dev->core;
-
-	/* Allocate XDR buffer (1MiB aligned) */
-	priv->xdr_buf = (void *)__get_free_pages(GFP_KERNEL,
-		get_order(XDR_BUF_SIZE));
-	if (priv->xdr_buf == NULL) {
-		dev_dbg(&dev->core, "%s:%d: could not allocate XDR buffer\n",
-			__func__, __LINE__);
-		ret = -ENOMEM;
-		goto out_free_priv;
-	}
-
-	/* Put FIFO at begginning of XDR buffer */
-	priv->fifo_base = (u32 *) (priv->xdr_buf + FIFO_OFFSET);
-	priv->fifo_ptr = priv->fifo_base;
-
-	/* XXX: Need to open GPU, in case ps3fb or snd_ps3 aren't loaded */
-	if (ps3_open_hv_device(dev)) {
-		dev_err(&dev->core, "%s:%d: ps3_open_hv_device failed\n",
-			__func__, __LINE__);
-		ret = -EAGAIN;
-		goto out_close_gpu;
-	}
-
-	/* Request memory */
-	status = -1;
-	ddr_size = memparse(size, &rest);
-	if (*rest == '-')
-		ddr_size -= ps3fb_videomemory.size;
-	ddr_size = ALIGN(ddr_size, 1024*1024);
-	if (ddr_size <= 0) {
-		dev_err(&dev->core, "%s:%d: specified size is too small\n",
-			__func__, __LINE__);
-		ret = -EINVAL;
-		goto out_close_gpu;
-	}
-
-	while (ddr_size > 0) {
-		status = lv1_gpu_memory_allocate(ddr_size, 0, 0, 0, 0,
-						 &priv->memory_handle,
-						 &ddr_lpar);
-		if (!status)
-			break;
-		ddr_size -= 1024*1024;
-	}
-	if (status || ddr_size <= 0) {
-		dev_err(&dev->core, "%s:%d: lv1_gpu_memory_allocate failed\n",
-			__func__, __LINE__);
-		ret = -ENOMEM;
-		goto out_free_xdr_buf;
-	}
-
-	/* Request context */
-	status = lv1_gpu_context_allocate(priv->memory_handle,
-					  0,
-					  &priv->context_handle,
-					  &ctrl_lpar,
-					  &info_lpar,
-					  &reports_lpar,
-					  &reports_size);
-	if (status) {
-		dev_err(&dev->core, "%s:%d: lv1_gpu_context_allocate failed\n",
-			__func__, __LINE__);
-		ret = -ENOMEM;
-		goto out_free_memory;
-	}
-
-	/* Map XDR buffer to RSX */
-	status = lv1_gpu_context_iomap(priv->context_handle, XDR_IOIF,
-				       ps3_mm_phys_to_lpar(__pa(priv->xdr_buf)),
-				       XDR_BUF_SIZE, 0);
-	if (status) {
-		dev_err(&dev->core, "%s:%d: lv1_gpu_context_iomap failed\n",
-			__func__, __LINE__);
-		ret = -ENOMEM;
-		goto out_free_context;
-	}
-
-	priv->ddr_base = ioremap_flags(ddr_lpar, ddr_size, _PAGE_NO_CACHE);
-
-	if (!priv->ddr_base) {
-		dev_err(&dev->core, "%s:%d: ioremap failed\n", __func__,
-			__LINE__);
-		ret = -ENOMEM;
-		goto out_free_context;
-	}
-
-	priv->ctrl = ioremap(ctrl_lpar, 64 * 1024);
-	if (!priv->ctrl) {
-		dev_err(&dev->core, "%s:%d: ioremap failed\n", __func__,
-			__LINE__);
-		ret = -ENOMEM;
-		goto out_unmap_vram;
-	}
-
-	priv->reports = ioremap(reports_lpar, reports_size);
-	if (!priv->reports) {
-		dev_err(&dev->core, "%s:%d: ioremap failed\n", __func__,
-			__LINE__);
-		ret = -ENOMEM;
-		goto out_unmap_ctrl;
-	}
-
-	mutex_lock(&ps3_gpu_mutex);
-	ps3vram_init_ring(&ps3vram_mtd);
-	mutex_unlock(&ps3_gpu_mutex);
-
-	ps3vram_mtd.name = "ps3vram";
-	ps3vram_mtd.size = ddr_size;
-	ps3vram_mtd.flags = MTD_CAP_RAM;
-	ps3vram_mtd.erase = ps3vram_erase;
-	ps3vram_mtd.point = NULL;
-	ps3vram_mtd.unpoint = NULL;
-	ps3vram_mtd.read = ps3vram_read;
-	ps3vram_mtd.write = ps3vram_write;
-	ps3vram_mtd.owner = THIS_MODULE;
-	ps3vram_mtd.type = MTD_RAM;
-	ps3vram_mtd.erasesize = CACHE_PAGE_SIZE;
-	ps3vram_mtd.writesize = 1;
-
-	ps3vram_bind(&ps3vram_mtd);
-
-	mutex_lock(&ps3_gpu_mutex);
-	ret = ps3vram_wait_ring(&ps3vram_mtd, 100);
-	mutex_unlock(&ps3_gpu_mutex);
-	if (ret < 0) {
-		dev_err(&dev->core, "%s:%d: failed to initialize channels\n",
-			__func__, __LINE__);
-		ret = -ETIMEDOUT;
-		goto out_unmap_reports;
-	}
-
-	ps3vram_cache_init(&ps3vram_mtd);
-
-	if (add_mtd_device(&ps3vram_mtd)) {
-		dev_err(&dev->core, "%s:%d: add_mtd_device failed\n",
-			__func__, __LINE__);
-		ret = -EAGAIN;
-		goto out_cache_cleanup;
-	}
-
-	dev_info(&dev->core, "reserved %u MiB of gpu memory\n",
-		(unsigned int)(ddr_size / 1024 / 1024));
-
-	return 0;
-
-out_cache_cleanup:
-	ps3vram_cache_cleanup(&ps3vram_mtd);
-out_unmap_reports:
-	iounmap(priv->reports);
-out_unmap_ctrl:
-	iounmap(priv->ctrl);
-out_unmap_vram:
-	iounmap(priv->ddr_base);
-out_free_context:
-	lv1_gpu_context_free(priv->context_handle);
-out_free_memory:
-	lv1_gpu_memory_free(priv->memory_handle);
-out_close_gpu:
-	ps3_close_hv_device(dev);
-out_free_xdr_buf:
-	free_pages((unsigned long) priv->xdr_buf, get_order(XDR_BUF_SIZE));
-out_free_priv:
-	kfree(ps3vram_mtd.priv);
-	ps3vram_mtd.priv = NULL;
-out:
-	return ret;
-}
-
-static int ps3vram_shutdown(struct ps3_system_bus_device *dev)
-{
-	struct ps3vram_priv *priv;
-
-	priv = ps3vram_mtd.priv;
-
-	del_mtd_device(&ps3vram_mtd);
-	ps3vram_cache_cleanup(&ps3vram_mtd);
-	iounmap(priv->reports);
-	iounmap(priv->ctrl);
-	iounmap(priv->ddr_base);
-	lv1_gpu_context_free(priv->context_handle);
-	lv1_gpu_memory_free(priv->memory_handle);
-	ps3_close_hv_device(dev);
-	free_pages((unsigned long) priv->xdr_buf, get_order(XDR_BUF_SIZE));
-	kfree(priv);
-	return 0;
-}
-
-static struct ps3_system_bus_driver ps3vram_driver = {
-	.match_id	= PS3_MATCH_ID_GPU,
-	.match_sub_id	= PS3_MATCH_SUB_ID_GPU_RAMDISK,
-	.core.name	= DEVICE_NAME,
-	.core.owner	= THIS_MODULE,
-	.probe		= ps3vram_probe,
-	.remove		= ps3vram_shutdown,
-	.shutdown	= ps3vram_shutdown,
-};
-
-static int __init ps3vram_init(void)
-{
-	return ps3_system_bus_driver_register(&ps3vram_driver);
-}
-
-static void __exit ps3vram_exit(void)
-{
-	ps3_system_bus_driver_unregister(&ps3vram_driver);
-}
-
-module_init(ps3vram_init);
-module_exit(ps3vram_exit);
-
-MODULE_LICENSE("GPL");
-MODULE_AUTHOR("Jim Paris <jim@jtan.com>");
-MODULE_DESCRIPTION("MTD driver for PS3 video RAM");
-MODULE_ALIAS(PS3_MODULE_ALIAS_GPU_RAMDISK);
diff --git a/drivers/mtd/devices/slram.c b/drivers/mtd/devices/slram.c
index a425d09f35a..00248e81ecd 100644
--- a/drivers/mtd/devices/slram.c
+++ b/drivers/mtd/devices/slram.c
@@ -267,22 +267,28 @@ static int parse_cmdline(char *devname, char *szstart, char *szlength)
 	if (*(szlength) != '+') {
 		devlength = simple_strtoul(szlength, &buffer, 0);
 		devlength = handle_unit(devlength, buffer) - devstart;
+		if (devlength < devstart)
+			goto err_out;
+
+		devlength -= devstart;
 	} else {
 		devlength = simple_strtoul(szlength + 1, &buffer, 0);
 		devlength = handle_unit(devlength, buffer);
 	}
 	T("slram: devname=%s, devstart=0x%lx, devlength=0x%lx\n",
 			devname, devstart, devlength);
-	if ((devstart < 0) || (devlength < 0) || (devlength % SLRAM_BLK_SZ != 0)) {
-		E("slram: Illegal start / length parameter.\n");
-		return(-EINVAL);
-	}
+	if (devlength % SLRAM_BLK_SZ != 0)
+		goto err_out;
 
 	if ((devstart = register_device(devname, devstart, devlength))){
 		unregister_devices();
 		return((int)devstart);
 	}
 	return(0);
+
+err_out:
+	E("slram: Illegal length parameter.\n");
+	return(-EINVAL);
 }
 
 #ifndef MODULE
diff --git a/drivers/mtd/lpddr/Kconfig b/drivers/mtd/lpddr/Kconfig
index acd4ea9b227..5a401d8047a 100644
--- a/drivers/mtd/lpddr/Kconfig
+++ b/drivers/mtd/lpddr/Kconfig
@@ -12,6 +12,7 @@ config MTD_LPDDR
 	  DDR memories, intended for battery-operated systems.
 
 config MTD_QINFO_PROBE
+	depends on MTD_LPDDR
 	tristate "Detect flash chips by QINFO probe"
 	help
 	    Device Information for LPDDR chips is offered through the Overlay
diff --git a/drivers/mtd/maps/Kconfig b/drivers/mtd/maps/Kconfig
index 0225cbbf22d..043d50fb6ef 100644
--- a/drivers/mtd/maps/Kconfig
+++ b/drivers/mtd/maps/Kconfig
@@ -491,7 +491,7 @@ config MTD_PCMCIA_ANONYMOUS
 
 config MTD_BFIN_ASYNC
 	tristate "Blackfin BF533-STAMP Flash Chip Support"
-	depends on BFIN533_STAMP && MTD_CFI
+	depends on BFIN533_STAMP && MTD_CFI && MTD_COMPLEX_MAPPINGS
 	select MTD_PARTITIONS
 	default y
 	help
diff --git a/drivers/mtd/maps/bfin-async-flash.c b/drivers/mtd/maps/bfin-async-flash.c
index 6fec86aaed7..576611f605d 100644
--- a/drivers/mtd/maps/bfin-async-flash.c
+++ b/drivers/mtd/maps/bfin-async-flash.c
@@ -152,14 +152,18 @@ static int __devinit bfin_flash_probe(struct platform_device *pdev)
 
 	if (gpio_request(state->enet_flash_pin, DRIVER_NAME)) {
 		pr_devinit(KERN_ERR DRIVER_NAME ": Failed to request gpio %d\n", state->enet_flash_pin);
+		kfree(state);
 		return -EBUSY;
 	}
 	gpio_direction_output(state->enet_flash_pin, 1);
 
 	pr_devinit(KERN_NOTICE DRIVER_NAME ": probing %d-bit flash bus\n", state->map.bankwidth * 8);
 	state->mtd = do_map_probe(memory->name, &state->map);
-	if (!state->mtd)
+	if (!state->mtd) {
+		gpio_free(state->enet_flash_pin);
+		kfree(state);
 		return -ENXIO;
+	}
 
 #ifdef CONFIG_MTD_PARTITIONS
 	ret = parse_mtd_partitions(state->mtd, part_probe_types, &pdata->parts, 0);
diff --git a/drivers/mtd/maps/ck804xrom.c b/drivers/mtd/maps/ck804xrom.c
index 5f7a245ed13..424f17d6ffd 100644
--- a/drivers/mtd/maps/ck804xrom.c
+++ b/drivers/mtd/maps/ck804xrom.c
@@ -342,9 +342,9 @@ static struct pci_device_id ck804xrom_pci_tbl[] = {
 	{ 0, }
 };
 
+#if 0
 MODULE_DEVICE_TABLE(pci, ck804xrom_pci_tbl);
 
-#if 0
 static struct pci_driver ck804xrom_driver = {
 	.name =		MOD_NAME,
 	.id_table =	ck804xrom_pci_tbl,
diff --git a/drivers/mtd/maps/physmap.c b/drivers/mtd/maps/physmap.c
index 87743661d48..229718222db 100644
--- a/drivers/mtd/maps/physmap.c
+++ b/drivers/mtd/maps/physmap.c
@@ -29,6 +29,7 @@ struct physmap_flash_info {
 	struct map_info		map[MAX_RESOURCES];
 #ifdef CONFIG_MTD_PARTITIONS
 	int			nr_parts;
+	struct mtd_partition	*parts;
 #endif
 };
 
@@ -45,25 +46,29 @@ static int physmap_flash_remove(struct platform_device *dev)
 
 	physmap_data = dev->dev.platform_data;
 
-#ifdef CONFIG_MTD_CONCAT
-	if (info->cmtd != info->mtd[0]) {
+	if (info->cmtd) {
+#ifdef CONFIG_MTD_PARTITIONS
+		if (info->nr_parts || physmap_data->nr_parts)
+			del_mtd_partitions(info->cmtd);
+		else
+			del_mtd_device(info->cmtd);
+#else
 		del_mtd_device(info->cmtd);
-		mtd_concat_destroy(info->cmtd);
+#endif
 	}
+#ifdef CONFIG_MTD_PARTITIONS
+	if (info->nr_parts)
+		kfree(info->parts);
 #endif
 
-	for (i = 0; i < MAX_RESOURCES; i++) {
-		if (info->mtd[i] != NULL) {
-#ifdef CONFIG_MTD_PARTITIONS
-			if (info->nr_parts || physmap_data->nr_parts)
-				del_mtd_partitions(info->mtd[i]);
-			else
-				del_mtd_device(info->mtd[i]);
-#else
-			del_mtd_device(info->mtd[i]);
+#ifdef CONFIG_MTD_CONCAT
+	if (info->cmtd != info->mtd[0])
+		mtd_concat_destroy(info->cmtd);
 #endif
+
+	for (i = 0; i < MAX_RESOURCES; i++) {
+		if (info->mtd[i] != NULL)
 			map_destroy(info->mtd[i]);
-		}
 	}
 	return 0;
 }
@@ -86,9 +91,6 @@ static int physmap_flash_probe(struct platform_device *dev)
 	int err = 0;
 	int i;
 	int devices_found = 0;
-#ifdef CONFIG_MTD_PARTITIONS
-	struct mtd_partition *parts;
-#endif
 
 	physmap_data = dev->dev.platform_data;
 	if (physmap_data == NULL)
@@ -167,10 +169,11 @@ static int physmap_flash_probe(struct platform_device *dev)
 		goto err_out;
 
 #ifdef CONFIG_MTD_PARTITIONS
-	err = parse_mtd_partitions(info->cmtd, part_probe_types, &parts, 0);
+	err = parse_mtd_partitions(info->cmtd, part_probe_types,
+				&info->parts, 0);
 	if (err > 0) {
-		add_mtd_partitions(info->cmtd, parts, err);
-		kfree(parts);
+		add_mtd_partitions(info->cmtd, info->parts, err);
+		info->nr_parts = err;
 		return 0;
 	}
 
diff --git a/drivers/mtd/maps/sa1100-flash.c b/drivers/mtd/maps/sa1100-flash.c
index 7df6bbf0e4d..6f6a0f6dafd 100644
--- a/drivers/mtd/maps/sa1100-flash.c
+++ b/drivers/mtd/maps/sa1100-flash.c
@@ -453,7 +453,7 @@ static struct platform_driver sa1100_mtd_driver = {
 	.resume		= sa1100_mtd_resume,
 	.shutdown	= sa1100_mtd_shutdown,
 	.driver		= {
-		.name	= "flash",
+		.name	= "sa1100-mtd",
 		.owner	= THIS_MODULE,
 	},
 };
@@ -474,4 +474,4 @@ module_exit(sa1100_mtd_exit);
 MODULE_AUTHOR("Nicolas Pitre");
 MODULE_DESCRIPTION("SA1100 CFI map driver");
 MODULE_LICENSE("GPL");
-MODULE_ALIAS("platform:flash");
+MODULE_ALIAS("platform:sa1100-mtd");
diff --git a/drivers/mtd/nand/atmel_nand.c b/drivers/mtd/nand/atmel_nand.c
index c98c1570a40..47a33cec379 100644
--- a/drivers/mtd/nand/atmel_nand.c
+++ b/drivers/mtd/nand/atmel_nand.c
@@ -139,7 +139,8 @@ static int atmel_nand_device_ready(struct mtd_info *mtd)
 	struct nand_chip *nand_chip = mtd->priv;
 	struct atmel_nand_host *host = nand_chip->priv;
 
-	return gpio_get_value(host->board->rdy_pin);
+	return gpio_get_value(host->board->rdy_pin) ^
+                !!host->board->rdy_pin_active_low;
 }
 
 /*
diff --git a/drivers/mtd/nand/fsl_elbc_nand.c b/drivers/mtd/nand/fsl_elbc_nand.c
index 65929db2944..1f6eb257871 100644
--- a/drivers/mtd/nand/fsl_elbc_nand.c
+++ b/drivers/mtd/nand/fsl_elbc_nand.c
@@ -676,7 +676,7 @@ static int fsl_elbc_chip_init_tail(struct mtd_info *mtd)
 
 	dev_dbg(ctrl->dev, "fsl_elbc_init: nand->numchips = %d\n",
 	        chip->numchips);
-	dev_dbg(ctrl->dev, "fsl_elbc_init: nand->chipsize = %ld\n",
+	dev_dbg(ctrl->dev, "fsl_elbc_init: nand->chipsize = %lld\n",
 	        chip->chipsize);
 	dev_dbg(ctrl->dev, "fsl_elbc_init: nand->pagemask = %8x\n",
 	        chip->pagemask);
@@ -703,7 +703,7 @@ static int fsl_elbc_chip_init_tail(struct mtd_info *mtd)
 	dev_dbg(ctrl->dev, "fsl_elbc_init: nand->ecc.layout = %p\n",
 	        chip->ecc.layout);
 	dev_dbg(ctrl->dev, "fsl_elbc_init: mtd->flags = %08x\n", mtd->flags);
-	dev_dbg(ctrl->dev, "fsl_elbc_init: mtd->size = %d\n", mtd->size);
+	dev_dbg(ctrl->dev, "fsl_elbc_init: mtd->size = %lld\n", mtd->size);
 	dev_dbg(ctrl->dev, "fsl_elbc_init: mtd->erasesize = %d\n",
 	        mtd->erasesize);
 	dev_dbg(ctrl->dev, "fsl_elbc_init: mtd->writesize = %d\n",
@@ -932,8 +932,8 @@ static int __devinit fsl_elbc_chip_probe(struct fsl_elbc_ctrl *ctrl,
 #endif
 		add_mtd_device(&priv->mtd);
 
-	printk(KERN_INFO "eLBC NAND device at 0x%zx, bank %d\n",
-	       res.start, priv->bank);
+	printk(KERN_INFO "eLBC NAND device at 0x%llx, bank %d\n",
+	       (unsigned long long)res.start, priv->bank);
 	return 0;
 
 err:
diff --git a/drivers/mtd/nand/orion_nand.c b/drivers/mtd/nand/orion_nand.c
index 917cf8d3ae9..c2dfd3ea353 100644
--- a/drivers/mtd/nand/orion_nand.c
+++ b/drivers/mtd/nand/orion_nand.c
@@ -149,7 +149,7 @@ static int __devexit orion_nand_remove(struct platform_device *pdev)
 
 static struct platform_driver orion_nand_driver = {
 	.probe		= orion_nand_probe,
-	.remove		= orion_nand_remove,
+	.remove		= __devexit_p(orion_nand_remove),
 	.driver		= {
 		.name	= "orion_nand",
 		.owner	= THIS_MODULE,
diff --git a/drivers/mtd/nand/pasemi_nand.c b/drivers/mtd/nand/pasemi_nand.c
index 9bd6c9ac844..a8b9376cf32 100644
--- a/drivers/mtd/nand/pasemi_nand.c
+++ b/drivers/mtd/nand/pasemi_nand.c
@@ -107,7 +107,7 @@ static int __devinit pasemi_nand_probe(struct of_device *ofdev,
 	if (pasemi_nand_mtd)
 		return -ENODEV;
 
-	pr_debug("pasemi_nand at %lx-%lx\n", res.start, res.end);
+	pr_debug("pasemi_nand at %llx-%llx\n", res.start, res.end);
 
 	/* Allocate memory for MTD device structure and private data */
 	pasemi_nand_mtd = kzalloc(sizeof(struct mtd_info) +
@@ -170,7 +170,7 @@ static int __devinit pasemi_nand_probe(struct of_device *ofdev,
 		goto out_lpc;
 	}
 
-	printk(KERN_INFO "PA Semi NAND flash at %08lx, control at I/O %x\n",
+	printk(KERN_INFO "PA Semi NAND flash at %08llx, control at I/O %x\n",
 	       res.start, lpcctl);
 
 	return 0;
diff --git a/drivers/mtd/onenand/omap2.c b/drivers/mtd/onenand/omap2.c
index 96ecc1766fa..77a4f144615 100644
--- a/drivers/mtd/onenand/omap2.c
+++ b/drivers/mtd/onenand/omap2.c
@@ -629,7 +629,7 @@ static int __devinit omap2_onenand_probe(struct platform_device *pdev)
 	}
 
 	if (c->gpio_irq) {
-		if ((r = omap_request_gpio(c->gpio_irq)) < 0) {
+		if ((r = gpio_request(c->gpio_irq, "OneNAND irq")) < 0) {
 			dev_err(&pdev->dev,  "Failed to request GPIO%d for "
 				"OneNAND\n", c->gpio_irq);
 			goto err_iounmap;
@@ -726,7 +726,7 @@ err_release_dma:
 		free_irq(gpio_to_irq(c->gpio_irq), c);
 err_release_gpio:
 	if (c->gpio_irq)
-		omap_free_gpio(c->gpio_irq);
+		gpio_free(c->gpio_irq);
 err_iounmap:
 	iounmap(c->onenand.base);
 err_release_mem_region:
@@ -761,7 +761,7 @@ static int __devexit omap2_onenand_remove(struct platform_device *pdev)
 	platform_set_drvdata(pdev, NULL);
 	if (c->gpio_irq) {
 		free_irq(gpio_to_irq(c->gpio_irq), c);
-		omap_free_gpio(c->gpio_irq);
+		gpio_free(c->gpio_irq);
 	}
 	iounmap(c->onenand.base);
 	release_mem_region(c->phys_base, ONENAND_IO_SIZE);
diff --git a/drivers/mtd/ubi/Kconfig.debug b/drivers/mtd/ubi/Kconfig.debug
index 1e2ee22edef..2246f154e2f 100644
--- a/drivers/mtd/ubi/Kconfig.debug
+++ b/drivers/mtd/ubi/Kconfig.debug
@@ -33,16 +33,6 @@ config MTD_UBI_DEBUG_DISABLE_BGT
 	  This option switches the background thread off by default. The thread
 	  may be also be enabled/disabled via UBI sysfs.
 
-config MTD_UBI_DEBUG_USERSPACE_IO
-	bool "Direct user-space write/erase support"
-	default n
-	depends on MTD_UBI_DEBUG
-	help
-	  By default, users cannot directly write and erase individual
-	  eraseblocks of dynamic volumes, and have to use update operation
-	  instead. This option enables this capability - it is very useful for
-	  debugging and testing.
-
 config MTD_UBI_DEBUG_EMULATE_BITFLIPS
 	bool "Emulate flash bit-flips"
 	depends on MTD_UBI_DEBUG
diff --git a/drivers/mtd/ubi/build.c b/drivers/mtd/ubi/build.c
index 9082768cc6c..4048db83aef 100644
--- a/drivers/mtd/ubi/build.c
+++ b/drivers/mtd/ubi/build.c
@@ -263,8 +263,12 @@ static ssize_t dev_attribute_show(struct device *dev,
 	return ret;
 }
 
-/* Fake "release" method for UBI devices */
-static void dev_release(struct device *dev) { }
+static void dev_release(struct device *dev)
+{
+	struct ubi_device *ubi = container_of(dev, struct ubi_device, dev);
+
+	kfree(ubi);
+}
 
 /**
  * ubi_sysfs_init - initialize sysfs for an UBI device.
@@ -380,7 +384,7 @@ static void free_user_volumes(struct ubi_device *ubi)
  */
 static int uif_init(struct ubi_device *ubi)
 {
-	int i, err, do_free = 0;
+	int i, err;
 	dev_t dev;
 
 	sprintf(ubi->ubi_name, UBI_NAME_STR "%d", ubi->ubi_num);
@@ -427,13 +431,10 @@ static int uif_init(struct ubi_device *ubi)
 
 out_volumes:
 	kill_volumes(ubi);
-	do_free = 0;
 out_sysfs:
 	ubi_sysfs_close(ubi);
 	cdev_del(&ubi->cdev);
 out_unreg:
-	if (do_free)
-		free_user_volumes(ubi);
 	unregister_chrdev_region(ubi->cdev.dev, ubi->vtbl_slots + 1);
 	ubi_err("cannot initialize UBI %s, error %d", ubi->ubi_name, err);
 	return err;
@@ -947,6 +948,12 @@ int ubi_detach_mtd_dev(int ubi_num, int anyway)
 	if (ubi->bgt_thread)
 		kthread_stop(ubi->bgt_thread);
 
+	/*
+	 * Get a reference to the device in order to prevent 'dev_release()'
+	 * from freeing @ubi object.
+	 */
+	get_device(&ubi->dev);
+
 	uif_close(ubi);
 	ubi_wl_close(ubi);
 	free_internal_volumes(ubi);
@@ -958,7 +965,7 @@ int ubi_detach_mtd_dev(int ubi_num, int anyway)
 	vfree(ubi->dbg_peb_buf);
 #endif
 	ubi_msg("mtd%d is detached from ubi%d", ubi->mtd->index, ubi->ubi_num);
-	kfree(ubi);
+	put_device(&ubi->dev);
 	return 0;
 }
 
diff --git a/drivers/mtd/ubi/cdev.c b/drivers/mtd/ubi/cdev.c
index 98cf31ed081..e63c8fc3df3 100644
--- a/drivers/mtd/ubi/cdev.c
+++ b/drivers/mtd/ubi/cdev.c
@@ -40,9 +40,9 @@
 #include <linux/ioctl.h>
 #include <linux/capability.h>
 #include <linux/uaccess.h>
-#include <linux/smp_lock.h>
+#include <linux/compat.h>
+#include <linux/math64.h>
 #include <mtd/ubi-user.h>
-#include <asm/div64.h>
 #include "ubi.h"
 
 /**
@@ -195,7 +195,6 @@ static ssize_t vol_cdev_read(struct file *file, __user char *buf, size_t count,
 	int err, lnum, off, len,  tbuf_size;
 	size_t count_save = count;
 	void *tbuf;
-	uint64_t tmp;
 
 	dbg_gen("read %zd bytes from offset %lld of volume %d",
 		count, *offp, vol->vol_id);
@@ -225,10 +224,7 @@ static ssize_t vol_cdev_read(struct file *file, __user char *buf, size_t count,
 		return -ENOMEM;
 
 	len = count > tbuf_size ? tbuf_size : count;
-
-	tmp = *offp;
-	off = do_div(tmp, vol->usable_leb_size);
-	lnum = tmp;
+	lnum = div_u64_rem(*offp, vol->usable_leb_size, &off);
 
 	do {
 		cond_resched();
@@ -263,12 +259,9 @@ static ssize_t vol_cdev_read(struct file *file, __user char *buf, size_t count,
 	return err ? err : count_save - count;
 }
 
-#ifdef CONFIG_MTD_UBI_DEBUG_USERSPACE_IO
-
 /*
  * This function allows to directly write to dynamic UBI volumes, without
- * issuing the volume update operation. Available only as a debugging feature.
- * Very useful for testing UBI.
+ * issuing the volume update operation.
  */
 static ssize_t vol_cdev_direct_write(struct file *file, const char __user *buf,
 				     size_t count, loff_t *offp)
@@ -279,7 +272,9 @@ static ssize_t vol_cdev_direct_write(struct file *file, const char __user *buf,
 	int lnum, off, len, tbuf_size, err = 0;
 	size_t count_save = count;
 	char *tbuf;
-	uint64_t tmp;
+
+	if (!vol->direct_writes)
+		return -EPERM;
 
 	dbg_gen("requested: write %zd bytes to offset %lld of volume %u",
 		count, *offp, vol->vol_id);
@@ -287,10 +282,7 @@ static ssize_t vol_cdev_direct_write(struct file *file, const char __user *buf,
 	if (vol->vol_type == UBI_STATIC_VOLUME)
 		return -EROFS;
 
-	tmp = *offp;
-	off = do_div(tmp, vol->usable_leb_size);
-	lnum = tmp;
-
+	lnum = div_u64_rem(*offp, vol->usable_leb_size, &off);
 	if (off & (ubi->min_io_size - 1)) {
 		dbg_err("unaligned position");
 		return -EINVAL;
@@ -347,10 +339,6 @@ static ssize_t vol_cdev_direct_write(struct file *file, const char __user *buf,
 	return err ? err : count_save - count;
 }
 
-#else
-#define vol_cdev_direct_write(file, buf, count, offp) (-EPERM)
-#endif /* CONFIG_MTD_UBI_DEBUG_USERSPACE_IO */
-
 static ssize_t vol_cdev_write(struct file *file, const char __user *buf,
 			      size_t count, loff_t *offp)
 {
@@ -402,8 +390,8 @@ static ssize_t vol_cdev_write(struct file *file, const char __user *buf,
 	return count;
 }
 
-static int vol_cdev_ioctl(struct inode *inode, struct file *file,
-			  unsigned int cmd, unsigned long arg)
+static long vol_cdev_ioctl(struct file *file, unsigned int cmd,
+			   unsigned long arg)
 {
 	int err = 0;
 	struct ubi_volume_desc *desc = file->private_data;
@@ -487,7 +475,6 @@ static int vol_cdev_ioctl(struct inode *inode, struct file *file,
 		break;
 	}
 
-#ifdef CONFIG_MTD_UBI_DEBUG_USERSPACE_IO
 	/* Logical eraseblock erasure command */
 	case UBI_IOCEBER:
 	{
@@ -518,13 +505,77 @@ static int vol_cdev_ioctl(struct inode *inode, struct file *file,
 		err = ubi_wl_flush(ubi);
 		break;
 	}
-#endif
+
+	/* Logical eraseblock map command */
+	case UBI_IOCEBMAP:
+	{
+		struct ubi_map_req req;
+
+		err = copy_from_user(&req, argp, sizeof(struct ubi_map_req));
+		if (err) {
+			err = -EFAULT;
+			break;
+		}
+		err = ubi_leb_map(desc, req.lnum, req.dtype);
+		break;
+	}
+
+	/* Logical eraseblock un-map command */
+	case UBI_IOCEBUNMAP:
+	{
+		int32_t lnum;
+
+		err = get_user(lnum, (__user int32_t *)argp);
+		if (err) {
+			err = -EFAULT;
+			break;
+		}
+		err = ubi_leb_unmap(desc, lnum);
+		break;
+	}
+
+	/* Check if logical eraseblock is mapped command */
+	case UBI_IOCEBISMAP:
+	{
+		int32_t lnum;
+
+		err = get_user(lnum, (__user int32_t *)argp);
+		if (err) {
+			err = -EFAULT;
+			break;
+		}
+		err = ubi_is_mapped(desc, lnum);
+		break;
+	}
+
+	/* Set volume property command*/
+	case UBI_IOCSETPROP:
+	{
+		struct ubi_set_prop_req req;
+
+		err = copy_from_user(&req, argp,
+				sizeof(struct ubi_set_prop_req));
+		if (err) {
+			err = -EFAULT;
+			break;
+		}
+		switch (req.property) {
+		case UBI_PROP_DIRECT_WRITE:
+			mutex_lock(&ubi->volumes_mutex);
+			desc->vol->direct_writes = !!req.value;
+			mutex_unlock(&ubi->volumes_mutex);
+			break;
+		default:
+			err = -EINVAL;
+			break;
+		}
+		break;
+	}
 
 	default:
 		err = -ENOTTY;
 		break;
 	}
-
 	return err;
 }
 
@@ -762,8 +813,8 @@ out_free:
 	return err;
 }
 
-static int ubi_cdev_ioctl(struct inode *inode, struct file *file,
-			  unsigned int cmd, unsigned long arg)
+static long ubi_cdev_ioctl(struct file *file, unsigned int cmd,
+			   unsigned long arg)
 {
 	int err = 0;
 	struct ubi_device *ubi;
@@ -773,7 +824,7 @@ static int ubi_cdev_ioctl(struct inode *inode, struct file *file,
 	if (!capable(CAP_SYS_RESOURCE))
 		return -EPERM;
 
-	ubi = ubi_get_by_major(imajor(inode));
+	ubi = ubi_get_by_major(imajor(file->f_mapping->host));
 	if (!ubi)
 		return -ENODEV;
 
@@ -843,7 +894,6 @@ static int ubi_cdev_ioctl(struct inode *inode, struct file *file,
 	case UBI_IOCRSVOL:
 	{
 		int pebs;
-		uint64_t tmp;
 		struct ubi_rsvol_req req;
 
 		dbg_gen("re-size volume");
@@ -863,9 +913,8 @@ static int ubi_cdev_ioctl(struct inode *inode, struct file *file,
 			break;
 		}
 
-		tmp = req.bytes;
-		pebs = !!do_div(tmp, desc->vol->usable_leb_size);
-		pebs += tmp;
+		pebs = div_u64(req.bytes + desc->vol->usable_leb_size - 1,
+			       desc->vol->usable_leb_size);
 
 		mutex_lock(&ubi->volumes_mutex);
 		err = ubi_resize_volume(desc, pebs);
@@ -909,8 +958,8 @@ static int ubi_cdev_ioctl(struct inode *inode, struct file *file,
 	return err;
 }
 
-static int ctrl_cdev_ioctl(struct inode *inode, struct file *file,
-			   unsigned int cmd, unsigned long arg)
+static long ctrl_cdev_ioctl(struct file *file, unsigned int cmd,
+			    unsigned long arg)
 {
 	int err = 0;
 	void __user *argp = (void __user *)arg;
@@ -986,26 +1035,59 @@ static int ctrl_cdev_ioctl(struct inode *inode, struct file *file,
 	return err;
 }
 
-/* UBI control character device operations */
-struct file_operations ubi_ctrl_cdev_operations = {
-	.ioctl = ctrl_cdev_ioctl,
-	.owner = THIS_MODULE,
+#ifdef CONFIG_COMPAT
+static long vol_cdev_compat_ioctl(struct file *file, unsigned int cmd,
+				  unsigned long arg)
+{
+	unsigned long translated_arg = (unsigned long)compat_ptr(arg);
+
+	return vol_cdev_ioctl(file, cmd, translated_arg);
+}
+
+static long ubi_cdev_compat_ioctl(struct file *file, unsigned int cmd,
+				  unsigned long arg)
+{
+	unsigned long translated_arg = (unsigned long)compat_ptr(arg);
+
+	return ubi_cdev_ioctl(file, cmd, translated_arg);
+}
+
+static long ctrl_cdev_compat_ioctl(struct file *file, unsigned int cmd,
+				   unsigned long arg)
+{
+	unsigned long translated_arg = (unsigned long)compat_ptr(arg);
+
+	return ctrl_cdev_ioctl(file, cmd, translated_arg);
+}
+#else
+#define vol_cdev_compat_ioctl  NULL
+#define ubi_cdev_compat_ioctl  NULL
+#define ctrl_cdev_compat_ioctl NULL
+#endif
+
+/* UBI volume character device operations */
+const struct file_operations ubi_vol_cdev_operations = {
+	.owner          = THIS_MODULE,
+	.open           = vol_cdev_open,
+	.release        = vol_cdev_release,
+	.llseek         = vol_cdev_llseek,
+	.read           = vol_cdev_read,
+	.write          = vol_cdev_write,
+	.unlocked_ioctl = vol_cdev_ioctl,
+	.compat_ioctl   = vol_cdev_compat_ioctl,
 };
 
 /* UBI character device operations */
-struct file_operations ubi_cdev_operations = {
-	.owner = THIS_MODULE,
-	.ioctl = ubi_cdev_ioctl,
-	.llseek = no_llseek,
+const struct file_operations ubi_cdev_operations = {
+	.owner          = THIS_MODULE,
+	.llseek         = no_llseek,
+	.unlocked_ioctl = ubi_cdev_ioctl,
+	.compat_ioctl   = ubi_cdev_compat_ioctl,
 };
 
-/* UBI volume character device operations */
-struct file_operations ubi_vol_cdev_operations = {
-	.owner   = THIS_MODULE,
-	.open    = vol_cdev_open,
-	.release = vol_cdev_release,
-	.llseek  = vol_cdev_llseek,
-	.read    = vol_cdev_read,
-	.write   = vol_cdev_write,
-	.ioctl   = vol_cdev_ioctl,
+/* UBI control character device operations */
+const struct file_operations ubi_ctrl_cdev_operations = {
+	.owner          = THIS_MODULE,
+	.unlocked_ioctl = ctrl_cdev_ioctl,
+	.compat_ioctl   = ctrl_cdev_compat_ioctl,
 };
diff --git a/drivers/mtd/ubi/gluebi.c b/drivers/mtd/ubi/gluebi.c
index 6dd4f5e77f8..49cd55ade9c 100644
--- a/drivers/mtd/ubi/gluebi.c
+++ b/drivers/mtd/ubi/gluebi.c
@@ -28,7 +28,7 @@
  * eraseblock size is equivalent to the logical eraseblock size of the volume.
  */
 
-#include <asm/div64.h>
+#include <linux/math64.h>
 #include "ubi.h"
 
 /**
@@ -109,7 +109,6 @@ static int gluebi_read(struct mtd_info *mtd, loff_t from, size_t len,
 	int err = 0, lnum, offs, total_read;
 	struct ubi_volume *vol;
 	struct ubi_device *ubi;
-	uint64_t tmp = from;
 
 	dbg_gen("read %zd bytes from offset %lld", len, from);
 
@@ -119,9 +118,7 @@ static int gluebi_read(struct mtd_info *mtd, loff_t from, size_t len,
 	vol = container_of(mtd, struct ubi_volume, gluebi_mtd);
 	ubi = vol->ubi;
 
-	offs = do_div(tmp, mtd->erasesize);
-	lnum = tmp;
-
+	lnum = div_u64_rem(from, mtd->erasesize, &offs);
 	total_read = len;
 	while (total_read) {
 		size_t to_read = mtd->erasesize - offs;
@@ -160,7 +157,6 @@ static int gluebi_write(struct mtd_info *mtd, loff_t to, size_t len,
 	int err = 0, lnum, offs, total_written;
 	struct ubi_volume *vol;
 	struct ubi_device *ubi;
-	uint64_t tmp = to;
 
 	dbg_gen("write %zd bytes to offset %lld", len, to);
 
@@ -173,8 +169,7 @@ static int gluebi_write(struct mtd_info *mtd, loff_t to, size_t len,
 	if (ubi->ro_mode)
 		return -EROFS;
 
-	offs = do_div(tmp, mtd->erasesize);
-	lnum = tmp;
+	lnum = div_u64_rem(to, mtd->erasesize, &offs);
 
 	if (len % mtd->writesize || offs % mtd->writesize)
 		return -EINVAL;
diff --git a/drivers/mtd/ubi/scan.c b/drivers/mtd/ubi/scan.c
index ecde202a5a1..c3d653ba5ca 100644
--- a/drivers/mtd/ubi/scan.c
+++ b/drivers/mtd/ubi/scan.c
@@ -42,7 +42,7 @@
 
 #include <linux/err.h>
 #include <linux/crc32.h>
-#include <asm/div64.h>
+#include <linux/math64.h>
 #include "ubi.h"
 
 #ifdef CONFIG_MTD_UBI_DEBUG_PARANOID
@@ -904,10 +904,8 @@ struct ubi_scan_info *ubi_scan(struct ubi_device *ubi)
 	dbg_msg("scanning is finished");
 
 	/* Calculate mean erase counter */
-	if (si->ec_count) {
-		do_div(si->ec_sum, si->ec_count);
-		si->mean_ec = si->ec_sum;
-	}
+	if (si->ec_count)
+		si->mean_ec = div_u64(si->ec_sum, si->ec_count);
 
 	if (si->is_empty)
 		ubi_msg("empty MTD device detected");
diff --git a/drivers/mtd/ubi/ubi.h b/drivers/mtd/ubi/ubi.h
index 4a8ec485c91..c055511bb1b 100644
--- a/drivers/mtd/ubi/ubi.h
+++ b/drivers/mtd/ubi/ubi.h
@@ -206,6 +206,7 @@ struct ubi_volume_desc;
  * @upd_marker: %1 if the update marker is set for this volume
  * @updating: %1 if the volume is being updated
  * @changing_leb: %1 if the atomic LEB change ioctl command is in progress
+ * @direct_writes: %1 if direct writes are enabled for this volume
  *
  * @gluebi_desc: gluebi UBI volume descriptor
  * @gluebi_refcount: reference count of the gluebi MTD device
@@ -253,6 +254,7 @@ struct ubi_volume {
 	unsigned int upd_marker:1;
 	unsigned int updating:1;
 	unsigned int changing_leb:1;
+	unsigned int direct_writes:1;
 
 #ifdef CONFIG_MTD_UBI_GLUEBI
 	/*
@@ -304,7 +306,8 @@ struct ubi_wl_entry;
  * @vtbl_size: size of the volume table in bytes
  * @vtbl: in-RAM volume table copy
  * @volumes_mutex: protects on-flash volume table and serializes volume
- *                 changes, like creation, deletion, update, re-size and re-name
+ *                 changes, like creation, deletion, update, re-size,
+ *                 re-name and set property
  *
  * @max_ec: current highest erase counter value
  * @mean_ec: current mean erase counter value
@@ -449,9 +452,9 @@ struct ubi_device {
 };
 
 extern struct kmem_cache *ubi_wl_entry_slab;
-extern struct file_operations ubi_ctrl_cdev_operations;
-extern struct file_operations ubi_cdev_operations;
-extern struct file_operations ubi_vol_cdev_operations;
+extern const struct file_operations ubi_ctrl_cdev_operations;
+extern const struct file_operations ubi_cdev_operations;
+extern const struct file_operations ubi_vol_cdev_operations;
 extern struct class *ubi_class;
 extern struct mutex ubi_devices_mutex;
 
diff --git a/drivers/mtd/ubi/upd.c b/drivers/mtd/ubi/upd.c
index 8b89cc18ff0..6b4d1ae891a 100644
--- a/drivers/mtd/ubi/upd.c
+++ b/drivers/mtd/ubi/upd.c
@@ -40,7 +40,7 @@
 
 #include <linux/err.h>
 #include <linux/uaccess.h>
-#include <asm/div64.h>
+#include <linux/math64.h>
 #include "ubi.h"
 
 /**
@@ -89,7 +89,6 @@ static int clear_update_marker(struct ubi_device *ubi, struct ubi_volume *vol,
 			       long long bytes)
 {
 	int err;
-	uint64_t tmp;
 	struct ubi_vtbl_record vtbl_rec;
 
 	dbg_gen("clear update marker for volume %d", vol->vol_id);
@@ -101,9 +100,9 @@ static int clear_update_marker(struct ubi_device *ubi, struct ubi_volume *vol,
 
 	if (vol->vol_type == UBI_STATIC_VOLUME) {
 		vol->corrupted = 0;
-		vol->used_bytes = tmp = bytes;
-		vol->last_eb_bytes = do_div(tmp, vol->usable_leb_size);
-		vol->used_ebs = tmp;
+		vol->used_bytes = bytes;
+		vol->used_ebs = div_u64_rem(bytes, vol->usable_leb_size,
+					    &vol->last_eb_bytes);
 		if (vol->last_eb_bytes)
 			vol->used_ebs += 1;
 		else
@@ -131,7 +130,6 @@ int ubi_start_update(struct ubi_device *ubi, struct ubi_volume *vol,
 		     long long bytes)
 {
 	int i, err;
-	uint64_t tmp;
 
 	dbg_gen("start update of volume %d, %llu bytes", vol->vol_id, bytes);
 	ubi_assert(!vol->updating && !vol->changing_leb);
@@ -161,9 +159,8 @@ int ubi_start_update(struct ubi_device *ubi, struct ubi_volume *vol,
 	if (!vol->upd_buf)
 		return -ENOMEM;
 
-	tmp = bytes;
-	vol->upd_ebs = !!do_div(tmp, vol->usable_leb_size);
-	vol->upd_ebs += tmp;
+	vol->upd_ebs = div_u64(bytes + vol->usable_leb_size - 1,
+			       vol->usable_leb_size);
 	vol->upd_bytes = bytes;
 	vol->upd_received = 0;
 	return 0;
@@ -282,7 +279,6 @@ static int write_leb(struct ubi_device *ubi, struct ubi_volume *vol, int lnum,
 int ubi_more_update_data(struct ubi_device *ubi, struct ubi_volume *vol,
 			 const void __user *buf, int count)
 {
-	uint64_t tmp;
 	int lnum, offs, err = 0, len, to_write = count;
 
 	dbg_gen("write %d of %lld bytes, %lld already passed",
@@ -291,10 +287,7 @@ int ubi_more_update_data(struct ubi_device *ubi, struct ubi_volume *vol,
 	if (ubi->ro_mode)
 		return -EROFS;
 
-	tmp = vol->upd_received;
-	offs = do_div(tmp, vol->usable_leb_size);
-	lnum = tmp;
-
+	lnum = div_u64_rem(vol->upd_received,  vol->usable_leb_size, &offs);
 	if (vol->upd_received + count > vol->upd_bytes)
 		to_write = count = vol->upd_bytes - vol->upd_received;
 
diff --git a/drivers/mtd/ubi/vmt.c b/drivers/mtd/ubi/vmt.c
index 22e1d7398fc..df5483562b7 100644
--- a/drivers/mtd/ubi/vmt.c
+++ b/drivers/mtd/ubi/vmt.c
@@ -24,7 +24,7 @@
  */
 
 #include <linux/err.h>
-#include <asm/div64.h>
+#include <linux/math64.h>
 #include "ubi.h"
 
 #ifdef CONFIG_MTD_UBI_DEBUG_PARANOID
@@ -205,7 +205,6 @@ int ubi_create_volume(struct ubi_device *ubi, struct ubi_mkvol_req *req)
 	int i, err, vol_id = req->vol_id, do_free = 1;
 	struct ubi_volume *vol;
 	struct ubi_vtbl_record vtbl_rec;
-	uint64_t bytes;
 	dev_t dev;
 
 	if (ubi->ro_mode)
@@ -255,10 +254,8 @@ int ubi_create_volume(struct ubi_device *ubi, struct ubi_mkvol_req *req)
 
 	/* Calculate how many eraseblocks are requested */
 	vol->usable_leb_size = ubi->leb_size - ubi->leb_size % req->alignment;
-	bytes = req->bytes;
-	if (do_div(bytes, vol->usable_leb_size))
-		vol->reserved_pebs = 1;
-	vol->reserved_pebs += bytes;
+	vol->reserved_pebs += div_u64(req->bytes + vol->usable_leb_size - 1,
+				      vol->usable_leb_size);
 
 	/* Reserve physical eraseblocks */
 	if (vol->reserved_pebs > ubi->avail_pebs) {
@@ -301,10 +298,10 @@ int ubi_create_volume(struct ubi_device *ubi, struct ubi_mkvol_req *req)
 		vol->used_bytes =
 			(long long)vol->used_ebs * vol->usable_leb_size;
 	} else {
-		bytes = vol->used_bytes;
-		vol->last_eb_bytes = do_div(bytes, vol->usable_leb_size);
-		vol->used_ebs = bytes;
-		if (vol->last_eb_bytes)
+		vol->used_ebs = div_u64_rem(vol->used_bytes,
+					    vol->usable_leb_size,
+					    &vol->last_eb_bytes);
+		if (vol->last_eb_bytes != 0)
 			vol->used_ebs += 1;
 		else
 			vol->last_eb_bytes = vol->usable_leb_size;