Merge branch 'origin' into devel-stable

Conflicts:
	arch/arm/mach-mx2/devices.c
	arch/arm/mach-mx2/devices.h
	sound/soc/pxa/pxa-ssp.c

13 files changed, 256 insertions, 512 deletions

diff --git a/drivers/mtd/maps/Kconfig b/drivers/mtd/maps/Kconfig
index 2de0cc823d6..aa2807d0ce7 100644
--- a/drivers/mtd/maps/Kconfig
+++ b/drivers/mtd/maps/Kconfig
@@ -251,12 +251,6 @@ config MTD_NETtel
         help
           Support for flash chips on NETtel/SecureEdge/SnapGear boards.
 
-config MTD_ALCHEMY
-        tristate "AMD Alchemy Pb1xxx/Db1xxx/RDK MTD support"
-        depends on SOC_AU1X00 && MTD_PARTITIONS && MTD_CFI
-        help
-          Flash memory access on AMD Alchemy Pb/Db/RDK Reference Boards
-
 config MTD_DILNETPC
         tristate "CFI Flash device mapped on DIL/Net PC"
         depends on X86 && MTD_CONCAT && MTD_PARTITIONS && MTD_CFI_INTELEXT && BROKEN
@@ -428,15 +422,6 @@ config MTD_H720X
           This enables access to the flash chips on the Hynix evaluation boards.
           If you have such a board, say 'Y'.
 
-config MTD_OMAP_NOR
-        tristate "TI OMAP board mappings"
-        depends on MTD_CFI && ARCH_OMAP
-        help
-          This enables access to the NOR flash chips on TI OMAP-based
-          boards defining flash platform devices and flash platform data.
-          These boards include the Innovator, H2, H3, OSK, Perseus2, and
-          more.  If you have such a board, say 'Y'.
-
 # This needs CFI or JEDEC, depending on the cards found.
 config MTD_PCI
         tristate "PCI MTD driver"
diff --git a/drivers/mtd/maps/Makefile b/drivers/mtd/maps/Makefile
index ce315214ff2..bb035cd54c7 100644
--- a/drivers/mtd/maps/Makefile
+++ b/drivers/mtd/maps/Makefile
@@ -40,7 +40,6 @@ obj-$(CONFIG_MTD_SCx200_DOCFLASH)+= scx200_docflash.o
 obj-$(CONFIG_MTD_DBOX2)         += dbox2-flash.o
 obj-$(CONFIG_MTD_SOLUTIONENGINE)+= solutionengine.o
 obj-$(CONFIG_MTD_PCI)           += pci.o
-obj-$(CONFIG_MTD_ALCHEMY)       += alchemy-flash.o
 obj-$(CONFIG_MTD_AUTCPU12)      += autcpu12-nvram.o
 obj-$(CONFIG_MTD_EDB7312)       += edb7312.o
 obj-$(CONFIG_MTD_IMPA7)         += impa7.o
@@ -55,7 +54,6 @@ obj-$(CONFIG_MTD_IXP2000)	+= ixp2000.o
 obj-$(CONFIG_MTD_WRSBC8260)     += wr_sbc82xx_flash.o
 obj-$(CONFIG_MTD_DMV182)        += dmv182.o
 obj-$(CONFIG_MTD_PLATRAM)       += plat-ram.o
-obj-$(CONFIG_MTD_OMAP_NOR)      += omap_nor.o
 obj-$(CONFIG_MTD_INTEL_VR_NOR)  += intel_vr_nor.o
 obj-$(CONFIG_MTD_BFIN_ASYNC)    += bfin-async-flash.o
 obj-$(CONFIG_MTD_RBTX4939)      += rbtx4939-flash.o
diff --git a/drivers/mtd/maps/alchemy-flash.c b/drivers/mtd/maps/alchemy-flash.c
deleted file mode 100644
index 845ad4f2a54..00000000000
--- a/drivers/mtd/maps/alchemy-flash.c
+++ /dev/null
@@ -1,166 +0,0 @@
-/*
- * Flash memory access on AMD Alchemy evaluation boards
- *
- * (C) 2003, 2004 Pete Popov <ppopov@embeddedalley.com>
- */
-
-#include <linux/init.h>
-#include <linux/module.h>
-#include <linux/types.h>
-#include <linux/kernel.h>
-
-#include <linux/mtd/mtd.h>
-#include <linux/mtd/map.h>
-#include <linux/mtd/partitions.h>
-
-#include <asm/io.h>
-
-#ifdef CONFIG_MIPS_PB1000
-#define BOARD_MAP_NAME "Pb1000 Flash"
-#define BOARD_FLASH_SIZE 0x00800000 /* 8MB */
-#define BOARD_FLASH_WIDTH 4 /* 32-bits */
-#endif
-
-#ifdef CONFIG_MIPS_PB1500
-#define BOARD_MAP_NAME "Pb1500 Flash"
-#define BOARD_FLASH_SIZE 0x04000000 /* 64MB */
-#define BOARD_FLASH_WIDTH 4 /* 32-bits */
-#endif
-
-#ifdef CONFIG_MIPS_PB1100
-#define BOARD_MAP_NAME "Pb1100 Flash"
-#define BOARD_FLASH_SIZE 0x04000000 /* 64MB */
-#define BOARD_FLASH_WIDTH 4 /* 32-bits */
-#endif
-
-#ifdef CONFIG_MIPS_PB1550
-#define BOARD_MAP_NAME "Pb1550 Flash"
-#define BOARD_FLASH_SIZE 0x08000000 /* 128MB */
-#define BOARD_FLASH_WIDTH 4 /* 32-bits */
-#endif
-
-#ifdef CONFIG_MIPS_PB1200
-#define BOARD_MAP_NAME "Pb1200 Flash"
-#define BOARD_FLASH_SIZE 0x08000000 /* 128MB */
-#define BOARD_FLASH_WIDTH 2 /* 16-bits */
-#endif
-
-#ifdef CONFIG_MIPS_DB1000
-#define BOARD_MAP_NAME "Db1000 Flash"
-#define BOARD_FLASH_SIZE 0x02000000 /* 32MB */
-#define BOARD_FLASH_WIDTH 4 /* 32-bits */
-#endif
-
-#ifdef CONFIG_MIPS_DB1500
-#define BOARD_MAP_NAME "Db1500 Flash"
-#define BOARD_FLASH_SIZE 0x02000000 /* 32MB */
-#define BOARD_FLASH_WIDTH 4 /* 32-bits */
-#endif
-
-#ifdef CONFIG_MIPS_DB1100
-#define BOARD_MAP_NAME "Db1100 Flash"
-#define BOARD_FLASH_SIZE 0x02000000 /* 32MB */
-#define BOARD_FLASH_WIDTH 4 /* 32-bits */
-#endif
-
-#ifdef CONFIG_MIPS_DB1550
-#define BOARD_MAP_NAME "Db1550 Flash"
-#define BOARD_FLASH_SIZE 0x08000000 /* 128MB */
-#define BOARD_FLASH_WIDTH 4 /* 32-bits */
-#endif
-
-#ifdef CONFIG_MIPS_DB1200
-#define BOARD_MAP_NAME "Db1200 Flash"
-#define BOARD_FLASH_SIZE 0x04000000 /* 64MB */
-#define BOARD_FLASH_WIDTH 2 /* 16-bits */
-#endif
-
-#ifdef CONFIG_MIPS_BOSPORUS
-#define BOARD_MAP_NAME "Bosporus Flash"
-#define BOARD_FLASH_SIZE 0x01000000 /* 16MB */
-#define BOARD_FLASH_WIDTH 2 /* 16-bits */
-#endif
-
-#ifdef CONFIG_MIPS_MIRAGE
-#define BOARD_MAP_NAME "Mirage Flash"
-#define BOARD_FLASH_SIZE 0x04000000 /* 64MB */
-#define BOARD_FLASH_WIDTH 4 /* 32-bits */
-#define USE_LOCAL_ACCESSORS /* why? */
-#endif
-
-static struct map_info alchemy_map = {
-        .name = BOARD_MAP_NAME,
-};
-
-static struct mtd_partition alchemy_partitions[] = {
-        {
-                .name = "User FS",
-                .size = BOARD_FLASH_SIZE - 0x00400000,
-                .offset = 0x0000000
-        },{
-                .name = "YAMON",
-                .size = 0x0100000,
-                .offset = MTDPART_OFS_APPEND,
-                .mask_flags = MTD_WRITEABLE
-        },{
-                .name = "raw kernel",
-                .size = (0x300000 - 0x40000), /* last 256KB is yamon env */
-                .offset = MTDPART_OFS_APPEND,
-        }
-};
-
-static struct mtd_info *mymtd;
-
-static int __init alchemy_mtd_init(void)
-{
-        struct mtd_partition *parts;
-        int nb_parts = 0;
-        unsigned long window_addr;
-        unsigned long window_size;
-
-        /* Default flash buswidth */
-        alchemy_map.bankwidth = BOARD_FLASH_WIDTH;
-
-        window_addr = 0x20000000 - BOARD_FLASH_SIZE;
-        window_size = BOARD_FLASH_SIZE;
-
-        /*
-         * Static partition definition selection
-         */
-        parts = alchemy_partitions;
-        nb_parts = ARRAY_SIZE(alchemy_partitions);
-        alchemy_map.size = window_size;
-
-        /*
-         * Now let's probe for the actual flash.  Do it here since
-         * specific machine settings might have been set above.
-         */
-        printk(KERN_NOTICE BOARD_MAP_NAME ": probing %d-bit flash bus\n",
-                        alchemy_map.bankwidth*8);
-        alchemy_map.virt = ioremap(window_addr, window_size);
-        mymtd = do_map_probe("cfi_probe", &alchemy_map);
-        if (!mymtd) {
-                iounmap(alchemy_map.virt);
-                return -ENXIO;
-        }
-        mymtd->owner = THIS_MODULE;
-
-        add_mtd_partitions(mymtd, parts, nb_parts);
-        return 0;
-}
-
-static void __exit alchemy_mtd_cleanup(void)
-{
-        if (mymtd) {
-                del_mtd_partitions(mymtd);
-                map_destroy(mymtd);
-                iounmap(alchemy_map.virt);
-        }
-}
-
-module_init(alchemy_mtd_init);
-module_exit(alchemy_mtd_cleanup);
-
-MODULE_AUTHOR("Embedded Alley Solutions, Inc");
-MODULE_DESCRIPTION(BOARD_MAP_NAME " MTD driver");
-MODULE_LICENSE("GPL");
diff --git a/drivers/mtd/maps/omap_nor.c b/drivers/mtd/maps/omap_nor.c
index ead0b2fab67..e69de29bb2d 100644
--- a/drivers/mtd/maps/omap_nor.c
+++ b/drivers/mtd/maps/omap_nor.c
@@ -1,188 +0,0 @@
-/*
- * Flash memory support for various TI OMAP boards
- *
- * Copyright (C) 2001-2002 MontaVista Software Inc.
- * Copyright (C) 2003-2004 Texas Instruments
- * Copyright (C) 2004 Nokia Corporation
- *
- *      Assembled using driver code copyright the companies above
- *      and written by David Brownell, Jian Zhang <jzhang@ti.com>,
- *      Tony Lindgren <tony@atomide.com> and others.
- *
- * This program is free software; you can redistribute it and/or modify it
- * under the terms of the GNU General Public License as published by the
- * Free Software Foundation; either version 2 of the License, or (at your
- * option) any later version.
- *
- * THIS SOFTWARE IS PROVIDED ``AS IS'' AND ANY EXPRESS OR IMPLIED
- * WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES OF
- * MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE DISCLAIMED. IN
- * NO EVENT SHALL THE AUTHOR BE LIABLE FOR ANY DIRECT, INDIRECT,
- * INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT
- * NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF
- * USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON
- * ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
- * (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF
- * THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
- *
- * You should have received a copy of the  GNU General Public License along
- * with this program; if not, write  to the Free Software Foundation, Inc.,
- * 675 Mass Ave, Cambridge, MA 02139, USA.
- */
-
-#include <linux/platform_device.h>
-#include <linux/module.h>
-#include <linux/types.h>
-#include <linux/kernel.h>
-#include <linux/init.h>
-#include <linux/ioport.h>
-#include <linux/slab.h>
-
-#include <linux/mtd/mtd.h>
-#include <linux/mtd/map.h>
-#include <linux/mtd/partitions.h>
-
-#include <asm/io.h>
-#include <mach/hardware.h>
-#include <asm/mach/flash.h>
-#include <plat/tc.h>
-
-#ifdef CONFIG_MTD_PARTITIONS
-static const char *part_probes[] = { /* "RedBoot", */ "cmdlinepart", NULL };
-#endif
-
-struct omapflash_info {
-        struct mtd_partition    *parts;
-        struct mtd_info         *mtd;
-        struct map_info         map;
-};
-
-static void omap_set_vpp(struct map_info *map, int enable)
-{
-        static int      count;
-        u32 l;
-
-        if (cpu_class_is_omap1()) {
-                if (enable) {
-                        if (count++ == 0) {
-                                l = omap_readl(EMIFS_CONFIG);
-                                l |= OMAP_EMIFS_CONFIG_WP;
-                                omap_writel(l, EMIFS_CONFIG);
-                        }
-                } else {
-                        if (count && (--count == 0)) {
-                                l = omap_readl(EMIFS_CONFIG);
-                                l &= ~OMAP_EMIFS_CONFIG_WP;
-                                omap_writel(l, EMIFS_CONFIG);
-                        }
-                }
-        }
-}
-
-static int __init omapflash_probe(struct platform_device *pdev)
-{
-        int err;
-        struct omapflash_info *info;
-        struct flash_platform_data *pdata = pdev->dev.platform_data;
-        struct resource *res = pdev->resource;
-        unsigned long size = res->end - res->start + 1;
-
-        info = kzalloc(sizeof(struct omapflash_info), GFP_KERNEL);
-        if (!info)
-                return -ENOMEM;
-
-        if (!request_mem_region(res->start, size, "flash")) {
-                err = -EBUSY;
-                goto out_free_info;
-        }
-
-        info->map.virt          = ioremap(res->start, size);
-        if (!info->map.virt) {
-                err = -ENOMEM;
-                goto out_release_mem_region;
-        }
-        info->map.name          = dev_name(&pdev->dev);
-        info->map.phys          = res->start;
-        info->map.size          = size;
-        info->map.bankwidth     = pdata->width;
-        info->map.set_vpp       = omap_set_vpp;
-
-        simple_map_init(&info->map);
-        info->mtd = do_map_probe(pdata->map_name, &info->map);
-        if (!info->mtd) {
-                err = -EIO;
-                goto out_iounmap;
-        }
-        info->mtd->owner = THIS_MODULE;
-
-        info->mtd->dev.parent = &pdev->dev;
-
-#ifdef CONFIG_MTD_PARTITIONS
-        err = parse_mtd_partitions(info->mtd, part_probes, &info->parts, 0);
-        if (err > 0)
-                add_mtd_partitions(info->mtd, info->parts, err);
-        else if (err <= 0 && pdata->parts)
-                add_mtd_partitions(info->mtd, pdata->parts, pdata->nr_parts);
-        else
-#endif
-                add_mtd_device(info->mtd);
-
-        platform_set_drvdata(pdev, info);
-
-        return 0;
-
-out_iounmap:
-        iounmap(info->map.virt);
-out_release_mem_region:
-        release_mem_region(res->start, size);
-out_free_info:
-        kfree(info);
-
-        return err;
-}
-
-static int __exit omapflash_remove(struct platform_device *pdev)
-{
-        struct omapflash_info *info = platform_get_drvdata(pdev);
-
-        platform_set_drvdata(pdev, NULL);
-
-        if (info) {
-                if (info->parts) {
-                        del_mtd_partitions(info->mtd);
-                        kfree(info->parts);
-                } else
-                        del_mtd_device(info->mtd);
-                map_destroy(info->mtd);
-                release_mem_region(info->map.phys, info->map.size);
-                iounmap((void __iomem *) info->map.virt);
-                kfree(info);
-        }
-
-        return 0;
-}
-
-static struct platform_driver omapflash_driver = {
-        .remove = __exit_p(omapflash_remove),
-        .driver = {
-                .name   = "omapflash",
-                .owner  = THIS_MODULE,
-        },
-};
-
-static int __init omapflash_init(void)
-{
-        return platform_driver_probe(&omapflash_driver, omapflash_probe);
-}
-
-static void __exit omapflash_exit(void)
-{
-        platform_driver_unregister(&omapflash_driver);
-}
-
-module_init(omapflash_init);
-module_exit(omapflash_exit);
-
-MODULE_LICENSE("GPL");
-MODULE_DESCRIPTION("MTD NOR map driver for TI OMAP boards");
-MODULE_ALIAS("platform:omapflash");
diff --git a/drivers/mtd/nand/Kconfig b/drivers/mtd/nand/Kconfig
index 4f99274b24c..1157d5679e6 100644
--- a/drivers/mtd/nand/Kconfig
+++ b/drivers/mtd/nand/Kconfig
@@ -457,10 +457,10 @@ config MTD_NAND_NOMADIK
 
 config MTD_NAND_SH_FLCTL
         tristate "Support for NAND on Renesas SuperH FLCTL"
-        depends on MTD_NAND && SUPERH && CPU_SUBTYPE_SH7723
+        depends on MTD_NAND && SUPERH
         help
           Several Renesas SuperH CPU has FLCTL. This option enables support
-          for NAND Flash using FLCTL. This driver support SH7723.
+          for NAND Flash using FLCTL.
 
 config MTD_NAND_DAVINCI
         tristate "Support NAND on DaVinci SoC"
diff --git a/drivers/mtd/nand/au1550nd.c b/drivers/mtd/nand/au1550nd.c
index 92c334ff450..43d46e42404 100644
--- a/drivers/mtd/nand/au1550nd.c
+++ b/drivers/mtd/nand/au1550nd.c
@@ -19,6 +19,7 @@
 #include <asm/io.h>
 
 #include <asm/mach-au1x00/au1xxx.h>
+#include <asm/mach-db1x00/bcsr.h>
 
 /*
  * MTD structure for NAND controller
@@ -475,7 +476,8 @@ static int __init au1xxx_nand_init(void)
         /* set gpio206 high */
         au_writel(au_readl(GPIO2_DIR) & ~(1 << 6), GPIO2_DIR);
 
-        boot_swapboot = (au_readl(MEM_STSTAT) & (0x7 << 1)) | ((bcsr->status >> 6) & 0x1);
+        boot_swapboot = (au_readl(MEM_STSTAT) & (0x7 << 1)) | ((bcsr_read(BCSR_STATUS) >> 6) & 0x1);
+
         switch (boot_swapboot) {
         case 0:
         case 2:
diff --git a/drivers/mtd/nand/omap2.c b/drivers/mtd/nand/omap2.c
index 1bb799f0125..26aec008018 100644
--- a/drivers/mtd/nand/omap2.c
+++ b/drivers/mtd/nand/omap2.c
@@ -30,12 +30,8 @@
 
 #define DRIVER_NAME     "omap2-nand"
 
-/* size (4 KiB) for IO mapping */
-#define NAND_IO_SIZE    SZ_4K
-
 #define NAND_WP_OFF     0
 #define NAND_WP_BIT     0x00000010
-#define WR_RD_PIN_MONITORING    0x00600000
 
 #define GPMC_BUF_FULL   0x00000001
 #define GPMC_BUF_EMPTY  0x00000000
@@ -882,8 +878,6 @@ static int __devinit omap_nand_probe(struct platform_device *pdev)
         struct omap_nand_info           *info;
         struct omap_nand_platform_data  *pdata;
         int                             err;
-        unsigned long                   val;
-
 
         pdata = pdev->dev.platform_data;
         if (pdata == NULL) {
@@ -905,28 +899,14 @@ static int __devinit omap_nand_probe(struct platform_device *pdev)
         info->gpmc_cs           = pdata->cs;
         info->gpmc_baseaddr     = pdata->gpmc_baseaddr;
         info->gpmc_cs_baseaddr  = pdata->gpmc_cs_baseaddr;
+        info->phys_base         = pdata->phys_base;
 
         info->mtd.priv          = &info->nand;
         info->mtd.name          = dev_name(&pdev->dev);
         info->mtd.owner         = THIS_MODULE;
 
-        err = gpmc_cs_request(info->gpmc_cs, NAND_IO_SIZE, &info->phys_base);
-        if (err < 0) {
-                dev_err(&pdev->dev, "Cannot request GPMC CS\n");
-                goto out_free_info;
-        }
-
-        /* Enable RD PIN Monitoring Reg */
-        if (pdata->dev_ready) {
-                val  = gpmc_cs_read_reg(info->gpmc_cs, GPMC_CS_CONFIG1);
-                val |= WR_RD_PIN_MONITORING;
-                gpmc_cs_write_reg(info->gpmc_cs, GPMC_CS_CONFIG1, val);
-        }
-
-        val  = gpmc_cs_read_reg(info->gpmc_cs, GPMC_CS_CONFIG7);
-        val &= ~(0xf << 8);
-        val |=  (0xc & 0xf) << 8;
-        gpmc_cs_write_reg(info->gpmc_cs, GPMC_CS_CONFIG7, val);
+        info->nand.options      |= pdata->devsize ? NAND_BUSWIDTH_16 : 0;
+        info->nand.options      |= NAND_SKIP_BBTSCAN;
 
         /* NAND write protect off */
         omap_nand_wp(&info->mtd, NAND_WP_OFF);
@@ -934,7 +914,7 @@ static int __devinit omap_nand_probe(struct platform_device *pdev)
         if (!request_mem_region(info->phys_base, NAND_IO_SIZE,
                                 pdev->dev.driver->name)) {
                 err = -EBUSY;
-                goto out_free_cs;
+                goto out_free_info;
         }
 
         info->nand.IO_ADDR_R = ioremap(info->phys_base, NAND_IO_SIZE);
@@ -963,11 +943,6 @@ static int __devinit omap_nand_probe(struct platform_device *pdev)
                 info->nand.chip_delay = 50;
         }
 
-        info->nand.options  |= NAND_SKIP_BBTSCAN;
-        if ((gpmc_cs_read_reg(info->gpmc_cs, GPMC_CS_CONFIG1) & 0x3000)
-                                                                == 0x1000)
-                info->nand.options  |= NAND_BUSWIDTH_16;
-
         if (use_prefetch) {
                 /* copy the virtual address of nand base for fifo access */
                 info->nand_pref_fifo_add = info->nand.IO_ADDR_R;
@@ -1043,8 +1018,6 @@ static int __devinit omap_nand_probe(struct platform_device *pdev)
 
 out_release_mem_region:
         release_mem_region(info->phys_base, NAND_IO_SIZE);
-out_free_cs:
-        gpmc_cs_free(info->gpmc_cs);
 out_free_info:
         kfree(info);
 
diff --git a/drivers/mtd/nand/sh_flctl.c b/drivers/mtd/nand/sh_flctl.c
index 02bef21f2e4..1842df8bdd9 100644
--- a/drivers/mtd/nand/sh_flctl.c
+++ b/drivers/mtd/nand/sh_flctl.c
@@ -1,10 +1,10 @@
 /*
  * SuperH FLCTL nand controller
  *
- * Copyright © 2008 Renesas Solutions Corp.
- * Copyright © 2008 Atom Create Engineering Co., Ltd.
+ * Copyright (c) 2008 Renesas Solutions Corp.
+ * Copyright (c) 2008 Atom Create Engineering Co., Ltd.
  *
- * Based on fsl_elbc_nand.c, Copyright © 2006-2007 Freescale Semiconductor
+ * Based on fsl_elbc_nand.c, Copyright (c) 2006-2007 Freescale Semiconductor
  *
  * This program is free software; you can redistribute it and/or modify
  * it under the terms of the GNU General Public License as published by
@@ -75,6 +75,11 @@ static void start_translation(struct sh_flctl *flctl)
         writeb(TRSTRT, FLTRCR(flctl));
 }
 
+static void timeout_error(struct sh_flctl *flctl, const char *str)
+{
+        dev_err(&flctl->pdev->dev, "Timeout occured in %s\n", str);
+}
+
 static void wait_completion(struct sh_flctl *flctl)
 {
         uint32_t timeout = LOOP_TIMEOUT_MAX;
@@ -87,7 +92,7 @@ static void wait_completion(struct sh_flctl *flctl)
                 udelay(1);
         }
 
-        printk(KERN_ERR "wait_completion(): Timeout occured \n");
+        timeout_error(flctl, __func__);
         writeb(0x0, FLTRCR(flctl));
 }
 
@@ -100,6 +105,8 @@ static void set_addr(struct mtd_info *mtd, int column, int page_addr)
                 addr = page_addr;       /* ERASE1 */
         } else if (page_addr != -1) {
                 /* SEQIN, READ0, etc.. */
+                if (flctl->chip.options & NAND_BUSWIDTH_16)
+                        column >>= 1;
                 if (flctl->page_size) {
                         addr = column & 0x0FFF;
                         addr |= (page_addr & 0xff) << 16;
@@ -132,7 +139,7 @@ static void wait_rfifo_ready(struct sh_flctl *flctl)
                         return;
                 udelay(1);
         }
-        printk(KERN_ERR "wait_rfifo_ready(): Timeout occured \n");
+        timeout_error(flctl, __func__);
 }
 
 static void wait_wfifo_ready(struct sh_flctl *flctl)
@@ -146,7 +153,7 @@ static void wait_wfifo_ready(struct sh_flctl *flctl)
                         return;
                 udelay(1);
         }
-        printk(KERN_ERR "wait_wfifo_ready(): Timeout occured \n");
+        timeout_error(flctl, __func__);
 }
 
 static int wait_recfifo_ready(struct sh_flctl *flctl, int sector_number)
@@ -198,7 +205,7 @@ static int wait_recfifo_ready(struct sh_flctl *flctl, int sector_number)
                 writel(0, FL4ECCCR(flctl));
         }
 
-        printk(KERN_ERR "wait_recfifo_ready(): Timeout occured \n");
+        timeout_error(flctl, __func__);
         return 1;       /* timeout */
 }
 
@@ -214,7 +221,7 @@ static void wait_wecfifo_ready(struct sh_flctl *flctl)
                         return;
                 udelay(1);
         }
-        printk(KERN_ERR "wait_wecfifo_ready(): Timeout occured \n");
+        timeout_error(flctl, __func__);
 }
 
 static void read_datareg(struct sh_flctl *flctl, int offset)
@@ -275,7 +282,7 @@ static void write_fiforeg(struct sh_flctl *flctl, int rlen, int offset)
 static void set_cmd_regs(struct mtd_info *mtd, uint32_t cmd, uint32_t flcmcdr_val)
 {
         struct sh_flctl *flctl = mtd_to_flctl(mtd);
-        uint32_t flcmncr_val = readl(FLCMNCR(flctl));
+        uint32_t flcmncr_val = readl(FLCMNCR(flctl)) & ~SEL_16BIT;
         uint32_t flcmdcr_val, addr_len_bytes = 0;
 
         /* Set SNAND bit if page size is 2048byte */
@@ -297,6 +304,8 @@ static void set_cmd_regs(struct mtd_info *mtd, uint32_t cmd, uint32_t flcmcdr_va
         case NAND_CMD_READOOB:
                 addr_len_bytes = flctl->rw_ADRCNT;
                 flcmdcr_val |= CDSRC_E;
+                if (flctl->chip.options & NAND_BUSWIDTH_16)
+                        flcmncr_val |= SEL_16BIT;
                 break;
         case NAND_CMD_SEQIN:
                 /* This case is that cmd is READ0 or READ1 or READ00 */
@@ -305,6 +314,8 @@ static void set_cmd_regs(struct mtd_info *mtd, uint32_t cmd, uint32_t flcmcdr_va
         case NAND_CMD_PAGEPROG:
                 addr_len_bytes = flctl->rw_ADRCNT;
                 flcmdcr_val |= DOCMD2_E | CDSRC_E | SELRW;
+                if (flctl->chip.options & NAND_BUSWIDTH_16)
+                        flcmncr_val |= SEL_16BIT;
                 break;
         case NAND_CMD_READID:
                 flcmncr_val &= ~SNAND_E;
@@ -523,6 +534,8 @@ static void flctl_cmdfunc(struct mtd_info *mtd, unsigned int command,
                 set_addr(mtd, 0, page_addr);
 
                 flctl->read_bytes = mtd->writesize + mtd->oobsize;
+                if (flctl->chip.options & NAND_BUSWIDTH_16)
+                        column >>= 1;
                 flctl->index += column;
                 goto read_normal_exit;
 
@@ -686,6 +699,18 @@ static uint8_t flctl_read_byte(struct mtd_info *mtd)
         return data;
 }
 
+static uint16_t flctl_read_word(struct mtd_info *mtd)
+{
+       struct sh_flctl *flctl = mtd_to_flctl(mtd);
+       int index = flctl->index;
+       uint16_t data;
+       uint16_t *buf = (uint16_t *)&flctl->done_buff[index];
+
+       data = *buf;
+       flctl->index += 2;
+       return data;
+}
+
 static void flctl_read_buf(struct mtd_info *mtd, uint8_t *buf, int len)
 {
         int i;
@@ -769,38 +794,36 @@ static int flctl_chip_init_tail(struct mtd_info *mtd)
         return 0;
 }
 
-static int __init flctl_probe(struct platform_device *pdev)
+static int __devinit flctl_probe(struct platform_device *pdev)
 {
         struct resource *res;
         struct sh_flctl *flctl;
         struct mtd_info *flctl_mtd;
         struct nand_chip *nand;
         struct sh_flctl_platform_data *pdata;
-        int ret;
+        int ret = -ENXIO;
 
         pdata = pdev->dev.platform_data;
         if (pdata == NULL) {
-                printk(KERN_ERR "sh_flctl platform_data not found.\n");
-                return -ENODEV;
+                dev_err(&pdev->dev, "no platform data defined\n");
+                return -EINVAL;
         }
 
         flctl = kzalloc(sizeof(struct sh_flctl), GFP_KERNEL);
         if (!flctl) {
-                printk(KERN_ERR "Unable to allocate NAND MTD dev structure.\n");
+                dev_err(&pdev->dev, "failed to allocate driver data\n");
                 return -ENOMEM;
         }
 
         res = platform_get_resource(pdev, IORESOURCE_MEM, 0);
         if (!res) {
-                printk(KERN_ERR "%s: resource not found.\n", __func__);
-                ret = -ENODEV;
+                dev_err(&pdev->dev, "failed to get I/O memory\n");
                 goto err;
         }
 
-        flctl->reg = ioremap(res->start, res->end - res->start + 1);
+        flctl->reg = ioremap(res->start, resource_size(res));
         if (flctl->reg == NULL) {
-                printk(KERN_ERR "%s: ioremap error.\n", __func__);
-                ret = -ENOMEM;
+                dev_err(&pdev->dev, "failed to remap I/O memory\n");
                 goto err;
         }
 
@@ -808,6 +831,7 @@ static int __init flctl_probe(struct platform_device *pdev)
         flctl_mtd = &flctl->mtd;
         nand = &flctl->chip;
         flctl_mtd->priv = nand;
+        flctl->pdev = pdev;
         flctl->hwecc = pdata->has_hwecc;
 
         flctl_register_init(flctl, pdata->flcmncr_val);
@@ -825,6 +849,11 @@ static int __init flctl_probe(struct platform_device *pdev)
         nand->select_chip = flctl_select_chip;
         nand->cmdfunc = flctl_cmdfunc;
 
+        if (pdata->flcmncr_val & SEL_16BIT) {
+                nand->options |= NAND_BUSWIDTH_16;
+                nand->read_word = flctl_read_word;
+        }
+
         ret = nand_scan_ident(flctl_mtd, 1);
         if (ret)
                 goto err;
@@ -846,7 +875,7 @@ err:
         return ret;
 }
 
-static int __exit flctl_remove(struct platform_device *pdev)
+static int __devexit flctl_remove(struct platform_device *pdev)
 {
         struct sh_flctl *flctl = platform_get_drvdata(pdev);
 
diff --git a/drivers/mtd/ubi/build.c b/drivers/mtd/ubi/build.c
index 14cec04c34f..bc45ef9af17 100644
--- a/drivers/mtd/ubi/build.c
+++ b/drivers/mtd/ubi/build.c
@@ -37,6 +37,7 @@
 #include <linux/module.h>
 #include <linux/moduleparam.h>
 #include <linux/stringify.h>
+#include <linux/namei.h>
 #include <linux/stat.h>
 #include <linux/miscdevice.h>
 #include <linux/log2.h>
@@ -50,7 +51,8 @@
 
 /**
  * struct mtd_dev_param - MTD device parameter description data structure.
- * @name: MTD device name or number string
+ * @name: MTD character device node path, MTD device name, or MTD device number
+ *        string
  * @vid_hdr_offs: VID header offset
  */
 struct mtd_dev_param {
@@ -59,10 +61,10 @@ struct mtd_dev_param {
 };
 
 /* Numbers of elements set in the @mtd_dev_param array */
-static int mtd_devs;
+static int __initdata mtd_devs;
 
 /* MTD devices specification parameters */
-static struct mtd_dev_param mtd_dev_param[UBI_MAX_DEVICES];
+static struct mtd_dev_param __initdata mtd_dev_param[UBI_MAX_DEVICES];
 
 /* Root UBI "class" object (corresponds to '/<sysfs>/class/ubi/') */
 struct class *ubi_class;
@@ -363,11 +365,13 @@ static void dev_release(struct device *dev)
 /**
  * ubi_sysfs_init - initialize sysfs for an UBI device.
  * @ubi: UBI device description object
+ * @ref: set to %1 on exit in case of failure if a reference to @ubi->dev was
+ *       taken
  *
  * This function returns zero in case of success and a negative error code in
  * case of failure.
  */
-static int ubi_sysfs_init(struct ubi_device *ubi)
+static int ubi_sysfs_init(struct ubi_device *ubi, int *ref)
 {
         int err;
 
@@ -379,6 +383,7 @@ static int ubi_sysfs_init(struct ubi_device *ubi)
         if (err)
                 return err;
 
+        *ref = 1;
         err = device_create_file(&ubi->dev, &dev_eraseblock_size);
         if (err)
                 return err;
@@ -434,7 +439,7 @@ static void ubi_sysfs_close(struct ubi_device *ubi)
 }
 
 /**
- * kill_volumes - destroy all volumes.
+ * kill_volumes - destroy all user volumes.
  * @ubi: UBI device description object
  */
 static void kill_volumes(struct ubi_device *ubi)
@@ -447,36 +452,29 @@ static void kill_volumes(struct ubi_device *ubi)
 }
 
 /**
- * free_user_volumes - free all user volumes.
- * @ubi: UBI device description object
- *
- * Normally the volumes are freed at the release function of the volume device
- * objects. However, on error paths the volumes have to be freed before the
- * device objects have been initialized.
- */
-static void free_user_volumes(struct ubi_device *ubi)
-{
-        int i;
-
-        for (i = 0; i < ubi->vtbl_slots; i++)
-                if (ubi->volumes[i]) {
-                        kfree(ubi->volumes[i]->eba_tbl);
-                        kfree(ubi->volumes[i]);
-                }
-}
-
-/**
  * uif_init - initialize user interfaces for an UBI device.
  * @ubi: UBI device description object
+ * @ref: set to %1 on exit in case of failure if a reference to @ubi->dev was
+ *       taken, otherwise set to %0
+ *
+ * This function initializes various user interfaces for an UBI device. If the
+ * initialization fails at an early stage, this function frees all the
+ * resources it allocated, returns an error, and @ref is set to %0. However,
+ * if the initialization fails after the UBI device was registered in the
+ * driver core subsystem, this function takes a reference to @ubi->dev, because
+ * otherwise the release function ('dev_release()') would free whole @ubi
+ * object. The @ref argument is set to %1 in this case. The caller has to put
+ * this reference.
  *
  * This function returns zero in case of success and a negative error code in
- * case of failure. Note, this function destroys all volumes if it fails.
+ * case of failure.
  */
-static int uif_init(struct ubi_device *ubi)
+static int uif_init(struct ubi_device *ubi, int *ref)
 {
         int i, err;
         dev_t dev;
 
+        *ref = 0;
         sprintf(ubi->ubi_name, UBI_NAME_STR "%d", ubi->ubi_num);
 
         /*
@@ -504,7 +502,7 @@ static int uif_init(struct ubi_device *ubi)
                 goto out_unreg;
         }
 
-        err = ubi_sysfs_init(ubi);
+        err = ubi_sysfs_init(ubi, ref);
         if (err)
                 goto out_sysfs;
 
@@ -522,6 +520,8 @@ static int uif_init(struct ubi_device *ubi)
 out_volumes:
         kill_volumes(ubi);
 out_sysfs:
+        if (*ref)
+                get_device(&ubi->dev);
         ubi_sysfs_close(ubi);
         cdev_del(&ubi->cdev);
 out_unreg:
@@ -875,7 +875,7 @@ static int ubi_reboot_notifier(struct notifier_block *n, unsigned long state,
 int ubi_attach_mtd_dev(struct mtd_info *mtd, int ubi_num, int vid_hdr_offset)
 {
         struct ubi_device *ubi;
-        int i, err, do_free = 1;
+        int i, err, ref = 0;
 
         /*
          * Check if we already have the same MTD device attached.
@@ -975,9 +975,9 @@ int ubi_attach_mtd_dev(struct mtd_info *mtd, int ubi_num, int vid_hdr_offset)
                         goto out_detach;
         }
 
-        err = uif_init(ubi);
+        err = uif_init(ubi, &ref);
         if (err)
-                goto out_nofree;
+                goto out_detach;
 
         ubi->bgt_thread = kthread_create(ubi_thread, ubi, ubi->bgt_name);
         if (IS_ERR(ubi->bgt_thread)) {
@@ -1025,12 +1025,8 @@ int ubi_attach_mtd_dev(struct mtd_info *mtd, int ubi_num, int vid_hdr_offset)
 
 out_uif:
         uif_close(ubi);
-out_nofree:
-        do_free = 0;
 out_detach:
         ubi_wl_close(ubi);
-        if (do_free)
-                free_user_volumes(ubi);
         free_internal_volumes(ubi);
         vfree(ubi->vtbl);
 out_free:
@@ -1039,7 +1035,10 @@ out_free:
 #ifdef CONFIG_MTD_UBI_DEBUG_PARANOID
         vfree(ubi->dbg_peb_buf);
 #endif
-        kfree(ubi);
+        if (ref)
+                put_device(&ubi->dev);
+        else
+                kfree(ubi);
         return err;
 }
 
@@ -1096,7 +1095,7 @@ int ubi_detach_mtd_dev(int ubi_num, int anyway)
 
         /*
          * Get a reference to the device in order to prevent 'dev_release()'
-         * from freeing @ubi object.
+         * from freeing the @ubi object.
          */
         get_device(&ubi->dev);
 
@@ -1116,13 +1115,50 @@ int ubi_detach_mtd_dev(int ubi_num, int anyway)
 }
 
 /**
- * find_mtd_device - open an MTD device by its name or number.
- * @mtd_dev: name or number of the device
+ * open_mtd_by_chdev - open an MTD device by its character device node path.
+ * @mtd_dev: MTD character device node path
+ *
+ * This helper function opens an MTD device by its character node device path.
+ * Returns MTD device description object in case of success and a negative
+ * error code in case of failure.
+ */
+static struct mtd_info * __init open_mtd_by_chdev(const char *mtd_dev)
+{
+        int err, major, minor, mode;
+        struct path path;
+
+        /* Probably this is an MTD character device node path */
+        err = kern_path(mtd_dev, LOOKUP_FOLLOW, &path);
+        if (err)
+                return ERR_PTR(err);
+
+        /* MTD device number is defined by the major / minor numbers */
+        major = imajor(path.dentry->d_inode);
+        minor = iminor(path.dentry->d_inode);
+        mode = path.dentry->d_inode->i_mode;
+        path_put(&path);
+        if (major != MTD_CHAR_MAJOR || !S_ISCHR(mode))
+                return ERR_PTR(-EINVAL);
+
+        if (minor & 1)
+                /*
+                 * Just do not think the "/dev/mtdrX" devices support is need,
+                 * so do not support them to avoid doing extra work.
+                 */
+                return ERR_PTR(-EINVAL);
+
+        return get_mtd_device(NULL, minor / 2);
+}
+
+/**
+ * open_mtd_device - open MTD device by name, character device path, or number.
+ * @mtd_dev: name, character device node path, or MTD device device number
  *
  * This function tries to open and MTD device described by @mtd_dev string,
- * which is first treated as an ASCII number, and if it is not true, it is
- * treated as MTD device name. Returns MTD device description object in case of
- * success and a negative error code in case of failure.
+ * which is first treated as ASCII MTD device number, and if it is not true, it
+ * is treated as MTD device name, and if that is also not true, it is treated
+ * as MTD character device node path. Returns MTD device description object in
+ * case of success and a negative error code in case of failure.
  */
 static struct mtd_info * __init open_mtd_device(const char *mtd_dev)
 {
@@ -1137,6 +1173,9 @@ static struct mtd_info * __init open_mtd_device(const char *mtd_dev)
                  * MTD device name.
                  */
                 mtd = get_mtd_device_nm(mtd_dev);
+                if (IS_ERR(mtd) && PTR_ERR(mtd) == -ENODEV)
+                        /* Probably this is an MTD character device node path */
+                        mtd = open_mtd_by_chdev(mtd_dev);
         } else
                 mtd = get_mtd_device(NULL, mtd_num);
 
@@ -1352,13 +1391,15 @@ static int __init ubi_mtd_param_parse(const char *val, struct kernel_param *kp)
 
 module_param_call(mtd, ubi_mtd_param_parse, NULL, NULL, 000);
 MODULE_PARM_DESC(mtd, "MTD devices to attach. Parameter format: "
-                      "mtd=<name|num>[,<vid_hdr_offs>].\n"
+                      "mtd=<name|num|path>[,<vid_hdr_offs>].\n"
                       "Multiple \"mtd\" parameters may be specified.\n"
-                      "MTD devices may be specified by their number or name.\n"
+                      "MTD devices may be specified by their number, name, or "
+                      "path to the MTD character device node.\n"
                       "Optional \"vid_hdr_offs\" parameter specifies UBI VID "
-                      "header position and data starting position to be used "
-                      "by UBI.\n"
-                      "Example: mtd=content,1984 mtd=4 - attach MTD device"
+                      "header position to be used by UBI.\n"
+                      "Example 1: mtd=/dev/mtd0 - attach MTD device "
+                      "/dev/mtd0.\n"
+                      "Example 2: mtd=content,1984 mtd=4 - attach MTD device "
                       "with name \"content\" using VID header offset 1984, and "
                       "MTD device number 4 with default VID header offset.");
 
diff --git a/drivers/mtd/ubi/debug.h b/drivers/mtd/ubi/debug.h
index f30bcb372c0..17a10712972 100644
--- a/drivers/mtd/ubi/debug.h
+++ b/drivers/mtd/ubi/debug.h
@@ -96,8 +96,11 @@ void ubi_dbg_dump_flash(struct ubi_device *ubi, int pnum, int offset, int len);
 
 #ifdef CONFIG_MTD_UBI_DEBUG_PARANOID
 int ubi_dbg_check_all_ff(struct ubi_device *ubi, int pnum, int offset, int len);
+int ubi_dbg_check_write(struct ubi_device *ubi, const void *buf, int pnum,
+                        int offset, int len);
 #else
 #define ubi_dbg_check_all_ff(ubi, pnum, offset, len) 0
+#define ubi_dbg_check_write(ubi, buf, pnum, offset, len) 0
 #endif
 
 #ifdef CONFIG_MTD_UBI_DEBUG_DISABLE_BGT
@@ -176,6 +179,7 @@ static inline int ubi_dbg_is_erase_failure(void)
 #define ubi_dbg_is_write_failure() 0
 #define ubi_dbg_is_erase_failure() 0
 #define ubi_dbg_check_all_ff(ubi, pnum, offset, len) 0
+#define ubi_dbg_check_write(ubi, buf, pnum, offset, len) 0
 
 #endif /* !CONFIG_MTD_UBI_DEBUG */
 #endif /* !__UBI_DEBUG_H__ */
diff --git a/drivers/mtd/ubi/io.c b/drivers/mtd/ubi/io.c
index 8aa51e7a6a7..b4ecc84c754 100644
--- a/drivers/mtd/ubi/io.c
+++ b/drivers/mtd/ubi/io.c
@@ -143,7 +143,7 @@ int ubi_io_read(const struct ubi_device *ubi, void *buf, int pnum, int offset,
 
         err = paranoid_check_not_bad(ubi, pnum);
         if (err)
-                return err > 0 ? -EINVAL : err;
+                return err;
 
         addr = (loff_t)pnum * ubi->peb_size + offset;
 retry:
@@ -236,12 +236,12 @@ int ubi_io_write(struct ubi_device *ubi, const void *buf, int pnum, int offset,
 
         err = paranoid_check_not_bad(ubi, pnum);
         if (err)
-                return err > 0 ? -EINVAL : err;
+                return err;
 
         /* The area we are writing to has to contain all 0xFF bytes */
         err = ubi_dbg_check_all_ff(ubi, pnum, offset, len);
         if (err)
-                return err > 0 ? -EINVAL : err;
+                return err;
 
         if (offset >= ubi->leb_start) {
                 /*
@@ -250,10 +250,10 @@ int ubi_io_write(struct ubi_device *ubi, const void *buf, int pnum, int offset,
                  */
                 err = paranoid_check_peb_ec_hdr(ubi, pnum);
                 if (err)
-                        return err > 0 ? -EINVAL : err;
+                        return err;
                 err = paranoid_check_peb_vid_hdr(ubi, pnum);
                 if (err)
-                        return err > 0 ? -EINVAL : err;
+                        return err;
         }
 
         if (ubi_dbg_is_write_failure()) {
@@ -273,6 +273,21 @@ int ubi_io_write(struct ubi_device *ubi, const void *buf, int pnum, int offset,
         } else
                 ubi_assert(written == len);
 
+        if (!err) {
+                err = ubi_dbg_check_write(ubi, buf, pnum, offset, len);
+                if (err)
+                        return err;
+
+                /*
+                 * Since we always write sequentially, the rest of the PEB has
+                 * to contain only 0xFF bytes.
+                 */
+                offset += len;
+                len = ubi->peb_size - offset;
+                if (len)
+                        err = ubi_dbg_check_all_ff(ubi, pnum, offset, len);
+        }
+
         return err;
 }
 
@@ -348,7 +363,7 @@ retry:
 
         err = ubi_dbg_check_all_ff(ubi, pnum, 0, ubi->peb_size);
         if (err)
-                return err > 0 ? -EINVAL : err;
+                return err;
 
         if (ubi_dbg_is_erase_failure() && !err) {
                 dbg_err("cannot erase PEB %d (emulated)", pnum);
@@ -542,7 +557,7 @@ int ubi_io_sync_erase(struct ubi_device *ubi, int pnum, int torture)
 
         err = paranoid_check_not_bad(ubi, pnum);
         if (err != 0)
-                return err > 0 ? -EINVAL : err;
+                return err;
 
         if (ubi->ro_mode) {
                 ubi_err("read-only mode");
@@ -819,7 +834,7 @@ int ubi_io_write_ec_hdr(struct ubi_device *ubi, int pnum,
 
         err = paranoid_check_ec_hdr(ubi, pnum, ec_hdr);
         if (err)
-                return -EINVAL;
+                return err;
 
         err = ubi_io_write(ubi, ec_hdr, pnum, 0, ubi->ec_hdr_alsize);
         return err;
@@ -1083,7 +1098,7 @@ int ubi_io_write_vid_hdr(struct ubi_device *ubi, int pnum,
 
         err = paranoid_check_peb_ec_hdr(ubi, pnum);
         if (err)
-                return err > 0 ? -EINVAL : err;
+                return err;
 
         vid_hdr->magic = cpu_to_be32(UBI_VID_HDR_MAGIC);
         vid_hdr->version = UBI_VERSION;
@@ -1092,7 +1107,7 @@ int ubi_io_write_vid_hdr(struct ubi_device *ubi, int pnum,
 
         err = paranoid_check_vid_hdr(ubi, pnum, vid_hdr);
         if (err)
-                return -EINVAL;
+                return err;
 
         p = (char *)vid_hdr - ubi->vid_hdr_shift;
         err = ubi_io_write(ubi, p, pnum, ubi->vid_hdr_aloffset,
@@ -1107,8 +1122,8 @@ int ubi_io_write_vid_hdr(struct ubi_device *ubi, int pnum,
  * @ubi: UBI device description object
  * @pnum: physical eraseblock number to check
  *
- * This function returns zero if the physical eraseblock is good, a positive
- * number if it is bad and a negative error code if an error occurred.
+ * This function returns zero if the physical eraseblock is good, %-EINVAL if
+ * it is bad and a negative error code if an error occurred.
  */
 static int paranoid_check_not_bad(const struct ubi_device *ubi, int pnum)
 {
@@ -1120,7 +1135,7 @@ static int paranoid_check_not_bad(const struct ubi_device *ubi, int pnum)
 
         ubi_err("paranoid check failed for PEB %d", pnum);
         ubi_dbg_dump_stack();
-        return err;
+        return err > 0 ? -EINVAL : err;
 }
 
 /**
@@ -1130,7 +1145,7 @@ static int paranoid_check_not_bad(const struct ubi_device *ubi, int pnum)
  * @ec_hdr: the erase counter header to check
  *
  * This function returns zero if the erase counter header contains valid
- * values, and %1 if not.
+ * values, and %-EINVAL if not.
  */
 static int paranoid_check_ec_hdr(const struct ubi_device *ubi, int pnum,
                                  const struct ubi_ec_hdr *ec_hdr)
@@ -1156,7 +1171,7 @@ static int paranoid_check_ec_hdr(const struct ubi_device *ubi, int pnum,
 fail:
         ubi_dbg_dump_ec_hdr(ec_hdr);
         ubi_dbg_dump_stack();
-        return 1;
+        return -EINVAL;
 }
 
 /**
@@ -1164,8 +1179,8 @@ fail:
  * @ubi: UBI device description object
  * @pnum: the physical eraseblock number to check
  *
- * This function returns zero if the erase counter header is all right, %1 if
- * not, and a negative error code if an error occurred.
+ * This function returns zero if the erase counter header is all right and and
+ * a negative error code if not or if an error occurred.
  */
 static int paranoid_check_peb_ec_hdr(const struct ubi_device *ubi, int pnum)
 {
@@ -1188,7 +1203,7 @@ static int paranoid_check_peb_ec_hdr(const struct ubi_device *ubi, int pnum)
                 ubi_err("paranoid check failed for PEB %d", pnum);
                 ubi_dbg_dump_ec_hdr(ec_hdr);
                 ubi_dbg_dump_stack();
-                err = 1;
+                err = -EINVAL;
                 goto exit;
         }
 
@@ -1206,7 +1221,7 @@ exit:
  * @vid_hdr: the volume identifier header to check
  *
  * This function returns zero if the volume identifier header is all right, and
- * %1 if not.
+ * %-EINVAL if not.
  */
 static int paranoid_check_vid_hdr(const struct ubi_device *ubi, int pnum,
                                   const struct ubi_vid_hdr *vid_hdr)
@@ -1233,7 +1248,7 @@ fail:
         ubi_err("paranoid check failed for PEB %d", pnum);
         ubi_dbg_dump_vid_hdr(vid_hdr);
         ubi_dbg_dump_stack();
-        return 1;
+        return -EINVAL;
 
 }
 
@@ -1243,7 +1258,7 @@ fail:
  * @pnum: the physical eraseblock number to check
  *
  * This function returns zero if the volume identifier header is all right,
- * %1 if not, and a negative error code if an error occurred.
+ * and a negative error code if not or if an error occurred.
  */
 static int paranoid_check_peb_vid_hdr(const struct ubi_device *ubi, int pnum)
 {
@@ -1270,7 +1285,7 @@ static int paranoid_check_peb_vid_hdr(const struct ubi_device *ubi, int pnum)
                 ubi_err("paranoid check failed for PEB %d", pnum);
                 ubi_dbg_dump_vid_hdr(vid_hdr);
                 ubi_dbg_dump_stack();
-                err = 1;
+                err = -EINVAL;
                 goto exit;
         }
 
@@ -1282,6 +1297,61 @@ exit:
 }
 
 /**
+ * ubi_dbg_check_write - make sure write succeeded.
+ * @ubi: UBI device description object
+ * @buf: buffer with data which were written
+ * @pnum: physical eraseblock number the data were written to
+ * @offset: offset within the physical eraseblock the data were written to
+ * @len: how many bytes were written
+ *
+ * This functions reads data which were recently written and compares it with
+ * the original data buffer - the data have to match. Returns zero if the data
+ * match and a negative error code if not or in case of failure.
+ */
+int ubi_dbg_check_write(struct ubi_device *ubi, const void *buf, int pnum,
+                        int offset, int len)
+{
+        int err, i;
+
+        mutex_lock(&ubi->dbg_buf_mutex);
+        err = ubi_io_read(ubi, ubi->dbg_peb_buf, pnum, offset, len);
+        if (err)
+                goto out_unlock;
+
+        for (i = 0; i < len; i++) {
+                uint8_t c = ((uint8_t *)buf)[i];
+                uint8_t c1 = ((uint8_t *)ubi->dbg_peb_buf)[i];
+                int dump_len;
+
+                if (c == c1)
+                        continue;
+
+                ubi_err("paranoid check failed for PEB %d:%d, len %d",
+                        pnum, offset, len);
+                ubi_msg("data differ at position %d", i);
+                dump_len = max_t(int, 128, len - i);
+                ubi_msg("hex dump of the original buffer from %d to %d",
+                        i, i + dump_len);
+                print_hex_dump(KERN_DEBUG, "", DUMP_PREFIX_OFFSET, 32, 1,
+                               buf + i, dump_len, 1);
+                ubi_msg("hex dump of the read buffer from %d to %d",
+                        i, i + dump_len);
+                print_hex_dump(KERN_DEBUG, "", DUMP_PREFIX_OFFSET, 32, 1,
+                               ubi->dbg_peb_buf + i, dump_len, 1);
+                ubi_dbg_dump_stack();
+                err = -EINVAL;
+                goto out_unlock;
+        }
+        mutex_unlock(&ubi->dbg_buf_mutex);
+
+        return 0;
+
+out_unlock:
+        mutex_unlock(&ubi->dbg_buf_mutex);
+        return err;
+}
+
+/**
  * ubi_dbg_check_all_ff - check that a region of flash is empty.
  * @ubi: UBI device description object
  * @pnum: the physical eraseblock number to check
@@ -1289,8 +1359,8 @@ exit:
  * @len: the length of the region to check
  *
  * This function returns zero if only 0xFF bytes are present at offset
- * @offset of the physical eraseblock @pnum, %1 if not, and a negative error
- * code if an error occurred.
+ * @offset of the physical eraseblock @pnum, and a negative error code if not
+ * or if an error occurred.
  */
 int ubi_dbg_check_all_ff(struct ubi_device *ubi, int pnum, int offset, int len)
 {
@@ -1321,7 +1391,7 @@ fail:
         ubi_msg("hex dump of the %d-%d region", offset, offset + len);
         print_hex_dump(KERN_DEBUG, "", DUMP_PREFIX_OFFSET, 32, 1,
                        ubi->dbg_peb_buf, len, 1);
-        err = 1;
+        err = -EINVAL;
 error:
         ubi_dbg_dump_stack();
         mutex_unlock(&ubi->dbg_buf_mutex);
diff --git a/drivers/mtd/ubi/scan.c b/drivers/mtd/ubi/scan.c
index 90af61a2c3e..594184bbd56 100644
--- a/drivers/mtd/ubi/scan.c
+++ b/drivers/mtd/ubi/scan.c
@@ -974,11 +974,8 @@ struct ubi_scan_info *ubi_scan(struct ubi_device *ubi)
                         seb->ec = si->mean_ec;
 
         err = paranoid_check_si(ubi, si);
-        if (err) {
-                if (err > 0)
-                        err = -EINVAL;
+        if (err)
                 goto out_vidh;
-        }
 
         ubi_free_vid_hdr(ubi, vidh);
         kfree(ech);
@@ -1086,8 +1083,8 @@ void ubi_scan_destroy_si(struct ubi_scan_info *si)
  * @ubi: UBI device description object
  * @si: scanning information
  *
- * This function returns zero if the scanning information is all right, %1 if
- * not and a negative error code if an error occurred.
+ * This function returns zero if the scanning information is all right, and a
+ * negative error code if not or if an error occurred.
  */
 static int paranoid_check_si(struct ubi_device *ubi, struct ubi_scan_info *si)
 {
@@ -1346,7 +1343,7 @@ bad_vid_hdr:
 
 out:
         ubi_dbg_dump_stack();
-        return 1;
+        return -EINVAL;
 }
 
 #endif /* CONFIG_MTD_UBI_DEBUG_PARANOID */
diff --git a/drivers/mtd/ubi/wl.c b/drivers/mtd/ubi/wl.c
index 600c7229d5c..f64ddabd4ac 100644
--- a/drivers/mtd/ubi/wl.c
+++ b/drivers/mtd/ubi/wl.c
@@ -464,7 +464,7 @@ retry:
                                    ubi->peb_size - ubi->vid_hdr_aloffset);
         if (err) {
                 ubi_err("new PEB %d does not contain all 0xFF bytes", e->pnum);
-                return err > 0 ? -EINVAL : err;
+                return err;
         }
 
         return e->pnum;
@@ -513,7 +513,7 @@ static int sync_erase(struct ubi_device *ubi, struct ubi_wl_entry *e,
         dbg_wl("erase PEB %d, old EC %llu", e->pnum, ec);
 
         err = paranoid_check_ec(ubi, e->pnum, e->ec);
-        if (err > 0)
+        if (err)
                 return -EINVAL;
 
         ec_hdr = kzalloc(ubi->ec_hdr_alsize, GFP_NOFS);
@@ -1572,8 +1572,7 @@ void ubi_wl_close(struct ubi_device *ubi)
  * @ec: the erase counter to check
  *
  * This function returns zero if the erase counter of physical eraseblock @pnum
- * is equivalent to @ec, %1 if not, and a negative error code if an error
- * occurred.
+ * is equivalent to @ec, and a negative error code if not or if an error occurred.
  */
 static int paranoid_check_ec(struct ubi_device *ubi, int pnum, int ec)
 {
@@ -1611,8 +1610,8 @@ out_free:
  * @e: the wear-leveling entry to check
  * @root: the root of the tree
  *
- * This function returns zero if @e is in the @root RB-tree and %1 if it is
- * not.
+ * This function returns zero if @e is in the @root RB-tree and %-EINVAL if it
+ * is not.
  */
 static int paranoid_check_in_wl_tree(struct ubi_wl_entry *e,
                                      struct rb_root *root)
@@ -1623,7 +1622,7 @@ static int paranoid_check_in_wl_tree(struct ubi_wl_entry *e,
         ubi_err("paranoid check failed for PEB %d, EC %d, RB-tree %p ",
                 e->pnum, e->ec, root);
         ubi_dbg_dump_stack();
-        return 1;
+        return -EINVAL;
 }
 
 /**
@@ -1632,7 +1631,7 @@ static int paranoid_check_in_wl_tree(struct ubi_wl_entry *e,
  * @ubi: UBI device description object
  * @e: the wear-leveling entry to check
  *
- * This function returns zero if @e is in @ubi->pq and %1 if it is not.
+ * This function returns zero if @e is in @ubi->pq and %-EINVAL if it is not.
  */
 static int paranoid_check_in_pq(struct ubi_device *ubi, struct ubi_wl_entry *e)
 {
@@ -1647,6 +1646,6 @@ static int paranoid_check_in_pq(struct ubi_device *ubi, struct ubi_wl_entry *e)
         ubi_err("paranoid check failed for PEB %d, EC %d, Protect queue",
                 e->pnum, e->ec);
         ubi_dbg_dump_stack();
-        return 1;
+        return -EINVAL;
 }
 #endif /* CONFIG_MTD_UBI_DEBUG_PARANOID */