10 files changed, 28 insertions, 268 deletions

diff --git a/drivers/mtd/maps/Kconfig b/drivers/mtd/maps/Kconfig
index 0b98654d8eed..7a58bd5522fd 100644
--- a/drivers/mtd/maps/Kconfig
+++ b/drivers/mtd/maps/Kconfig
@@ -284,13 +284,6 @@ config MTD_L440GX
 
           BE VERY CAREFUL.
 
-config MTD_SBC8240
-        tristate "Flash device on SBC8240"
-        depends on MTD_JEDECPROBE && 8260
-        help
-          Flash access on the SBC8240 board from Wind River.  See
-          <http://www.windriver.com/products/sbc8240/>
-
 config MTD_TQM8XXL
         tristate "CFI Flash device mapped on TQM8XXL"
         depends on MTD_CFI && TQM8xxL
diff --git a/drivers/mtd/maps/Makefile b/drivers/mtd/maps/Makefile
index 8bae7f9850c0..5beb0662d724 100644
--- a/drivers/mtd/maps/Makefile
+++ b/drivers/mtd/maps/Makefile
@@ -50,7 +50,6 @@ obj-$(CONFIG_MTD_UCLINUX)	+= uclinux.o
 obj-$(CONFIG_MTD_NETtel)        += nettel.o
 obj-$(CONFIG_MTD_SCB2_FLASH)    += scb2_flash.o
 obj-$(CONFIG_MTD_H720X)         += h720x-flash.o
-obj-$(CONFIG_MTD_SBC8240)       += sbc8240.o
 obj-$(CONFIG_MTD_IXP4XX)        += ixp4xx.o
 obj-$(CONFIG_MTD_IXP2000)       += ixp2000.o
 obj-$(CONFIG_MTD_WRSBC8260)     += wr_sbc82xx_flash.o
diff --git a/drivers/mtd/maps/sbc8240.c b/drivers/mtd/maps/sbc8240.c
index d5374cdcb163..e69de29bb2d1 100644
--- a/drivers/mtd/maps/sbc8240.c
+++ b/drivers/mtd/maps/sbc8240.c
@@ -1,250 +0,0 @@
-/*
- * Handle mapping of the flash memory access routines on the SBC8240 board.
- *
- * Carolyn Smith, Tektronix, Inc.
- *
- * This code is GPLed
- */
-
-/*
- * The SBC8240 has 2 flash banks.
- * Bank 0 is a 512 KiB AMD AM29F040B; 8 x 64 KiB sectors.
- * It contains the U-Boot code (7 sectors) and the environment (1 sector).
- * Bank 1 is 4 x 1 MiB AMD AM29LV800BT; 15 x 64 KiB sectors, 1 x 32 KiB sector,
- * 2 x 8 KiB sectors, 1 x 16 KiB sectors.
- * Both parts are JEDEC compatible.
- */
-
-#include <linux/module.h>
-#include <linux/types.h>
-#include <linux/kernel.h>
-#include <asm/io.h>
-
-#include <linux/mtd/mtd.h>
-#include <linux/mtd/map.h>
-#include <linux/mtd/cfi.h>
-
-#ifdef CONFIG_MTD_PARTITIONS
-#include <linux/mtd/partitions.h>
-#endif
-
-#define DEBUG
-
-#ifdef  DEBUG
-# define debugk(fmt,args...)    printk(fmt ,##args)
-#else
-# define debugk(fmt,args...)
-#endif
-
-
-#define WINDOW_ADDR0    0xFFF00000              /* 512 KiB */
-#define WINDOW_SIZE0    0x00080000
-#define BUSWIDTH0       1
-
-#define WINDOW_ADDR1    0xFF000000              /* 4 MiB */
-#define WINDOW_SIZE1    0x00400000
-#define BUSWIDTH1       8
-
-#define MSG_PREFIX "sbc8240:"   /* prefix for our printk()'s */
-#define MTDID      "sbc8240-%d" /* for mtdparts= partitioning */
-
-
-static struct map_info sbc8240_map[2] = {
-        {
-                .name           = "sbc8240 Flash Bank #0",
-                .size           = WINDOW_SIZE0,
-                .bankwidth       = BUSWIDTH0,
-        },
-        {
-                .name           = "sbc8240 Flash Bank #1",
-                .size           = WINDOW_SIZE1,
-                .bankwidth       = BUSWIDTH1,
-        }
-};
-
-#define NUM_FLASH_BANKS ARRAY_SIZE(sbc8240_map)
-
-/*
- * The following defines the partition layout of SBC8240 boards.
- *
- * See include/linux/mtd/partitions.h for definition of the
- * mtd_partition structure.
- *
- * The *_max_flash_size is the maximum possible mapped flash size
- * which is not necessarily the actual flash size. It must correspond
- * to the value specified in the mapping definition defined by the
- * "struct map_desc *_io_desc" for the corresponding machine.
- */
-
-#ifdef CONFIG_MTD_PARTITIONS
-
-static struct mtd_partition sbc8240_uboot_partitions [] = {
-        /* Bank 0 */
-        {
-                .name = "U-boot",                       /* U-Boot Firmware      */
-                .offset =       0,
-                .size = 0x00070000,                     /*  7 x 64 KiB sectors  */
-                .mask_flags = MTD_WRITEABLE,            /*  force read-only     */
-        },
-        {
-                .name = "environment",                  /* U-Boot environment   */
-                .offset =       0x00070000,
-                .size = 0x00010000,                     /*  1 x 64 KiB sector   */
-        },
-};
-
-static struct mtd_partition sbc8240_fs_partitions [] = {
-        {
-                .name = "jffs",                         /* JFFS  filesystem     */
-                .offset =       0,
-                .size = 0x003C0000,                     /*  4 * 15 * 64KiB      */
-        },
-        {
-                .name = "tmp32",
-                .offset =       0x003C0000,
-                .size = 0x00020000,                     /*  4 * 32KiB           */
-        },
-        {
-                .name = "tmp8a",
-                .offset =       0x003E0000,
-                .size = 0x00008000,                     /*  4 * 8KiB            */
-        },
-        {
-                .name = "tmp8b",
-                .offset =       0x003E8000,
-                .size = 0x00008000,                     /*  4 * 8KiB            */
-        },
-        {
-                .name = "tmp16",
-                .offset =       0x003F0000,
-                .size = 0x00010000,                     /*  4 * 16KiB           */
-        }
-};
-
-/* trivial struct to describe partition information */
-struct mtd_part_def
-{
-        int nums;
-        unsigned char *type;
-        struct mtd_partition* mtd_part;
-};
-
-static struct mtd_info *sbc8240_mtd[NUM_FLASH_BANKS];
-static struct mtd_part_def sbc8240_part_banks[NUM_FLASH_BANKS];
-
-
-#endif  /* CONFIG_MTD_PARTITIONS */
-
-
-static int __init init_sbc8240_mtd (void)
-{
-        static struct _cjs {
-                u_long addr;
-                u_long size;
-        } pt[NUM_FLASH_BANKS] = {
-                {
-                        .addr = WINDOW_ADDR0,
-                        .size = WINDOW_SIZE0
-                },
-                {
-                        .addr = WINDOW_ADDR1,
-                        .size = WINDOW_SIZE1
-                },
-        };
-
-        int devicesfound = 0;
-        int i,j;
-
-        for (i = 0; i < NUM_FLASH_BANKS; i++) {
-                printk (KERN_NOTICE MSG_PREFIX
-                        "Probing 0x%08lx at 0x%08lx\n", pt[i].size, pt[i].addr);
-
-                sbc8240_map[i].map_priv_1 =
-                        (unsigned long) ioremap (pt[i].addr, pt[i].size);
-                if (!sbc8240_map[i].map_priv_1) {
-                        printk (MSG_PREFIX "failed to ioremap\n");
-                        for (j = 0; j < i; j++) {
-                                iounmap((void *) sbc8240_map[j].map_priv_1);
-                                sbc8240_map[j].map_priv_1 = 0;
-                        }
-                        return -EIO;
-                }
-                simple_map_init(&sbc8240_mtd[i]);
-
-                sbc8240_mtd[i] = do_map_probe("jedec_probe", &sbc8240_map[i]);
-
-                if (sbc8240_mtd[i]) {
-                        sbc8240_mtd[i]->module = THIS_MODULE;
-                        devicesfound++;
-                } else {
-                        if (sbc8240_map[i].map_priv_1) {
-                                iounmap((void *) sbc8240_map[i].map_priv_1);
-                                sbc8240_map[i].map_priv_1 = 0;
-                        }
-                }
-        }
-
-        if (!devicesfound) {
-                printk(KERN_NOTICE MSG_PREFIX
-                       "No suppported flash chips found!\n");
-                return -ENXIO;
-        }
-
-#ifdef CONFIG_MTD_PARTITIONS
-        sbc8240_part_banks[0].mtd_part   = sbc8240_uboot_partitions;
-        sbc8240_part_banks[0].type       = "static image";
-        sbc8240_part_banks[0].nums       = ARRAY_SIZE(sbc8240_uboot_partitions);
-        sbc8240_part_banks[1].mtd_part   = sbc8240_fs_partitions;
-        sbc8240_part_banks[1].type       = "static file system";
-        sbc8240_part_banks[1].nums       = ARRAY_SIZE(sbc8240_fs_partitions);
-
-        for (i = 0; i < NUM_FLASH_BANKS; i++) {
-
-                if (!sbc8240_mtd[i]) continue;
-                if (sbc8240_part_banks[i].nums == 0) {
-                        printk (KERN_NOTICE MSG_PREFIX
-                                "No partition info available, registering whole device\n");
-                        add_mtd_device(sbc8240_mtd[i]);
-                } else {
-                        printk (KERN_NOTICE MSG_PREFIX
-                                "Using %s partition definition\n", sbc8240_part_banks[i].mtd_part->name);
-                        add_mtd_partitions (sbc8240_mtd[i],
-                                            sbc8240_part_banks[i].mtd_part,
-                                            sbc8240_part_banks[i].nums);
-                }
-        }
-#else
-        printk(KERN_NOTICE MSG_PREFIX
-               "Registering %d flash banks at once\n", devicesfound);
-
-        for (i = 0; i < devicesfound; i++) {
-                add_mtd_device(sbc8240_mtd[i]);
-        }
-#endif  /* CONFIG_MTD_PARTITIONS */
-
-        return devicesfound == 0 ? -ENXIO : 0;
-}
-
-static void __exit cleanup_sbc8240_mtd (void)
-{
-        int i;
-
-        for (i = 0; i < NUM_FLASH_BANKS; i++) {
-                if (sbc8240_mtd[i]) {
-                        del_mtd_device (sbc8240_mtd[i]);
-                        map_destroy (sbc8240_mtd[i]);
-                }
-                if (sbc8240_map[i].map_priv_1) {
-                        iounmap ((void *) sbc8240_map[i].map_priv_1);
-                        sbc8240_map[i].map_priv_1 = 0;
-                }
-        }
-}
-
-module_init (init_sbc8240_mtd);
-module_exit (cleanup_sbc8240_mtd);
-
-MODULE_LICENSE ("GPL");
-MODULE_AUTHOR ("Carolyn Smith <carolyn.smith@tektronix.com>");
-MODULE_DESCRIPTION ("MTD map driver for SBC8240 boards");
-
diff --git a/drivers/mtd/mtd_blkdevs.c b/drivers/mtd/mtd_blkdevs.c
index c3f62654b6df..7baba40c1ed2 100644
--- a/drivers/mtd/mtd_blkdevs.c
+++ b/drivers/mtd/mtd_blkdevs.c
@@ -144,7 +144,7 @@ static int blktrans_open(struct block_device *bdev, fmode_t mode)
         struct mtd_blktrans_ops *tr = dev->tr;
         int ret = -ENODEV;
 
-        if (!try_module_get(dev->mtd->owner))
+        if (!get_mtd_device(NULL, dev->mtd->index))
                 goto out;
 
         if (!try_module_get(tr->owner))
@@ -158,7 +158,7 @@ static int blktrans_open(struct block_device *bdev, fmode_t mode)
         ret = 0;
         if (tr->open && (ret = tr->open(dev))) {
                 dev->mtd->usecount--;
-                module_put(dev->mtd->owner);
+                put_mtd_device(dev->mtd);
         out_tr:
                 module_put(tr->owner);
         }
@@ -177,7 +177,7 @@ static int blktrans_release(struct gendisk *disk, fmode_t mode)
 
         if (!ret) {
                 dev->mtd->usecount--;
-                module_put(dev->mtd->owner);
+                put_mtd_device(dev->mtd);
                 module_put(tr->owner);
         }
 
diff --git a/drivers/mtd/mtdblock.c b/drivers/mtd/mtdblock.c
index 208c6faa0358..77db5ce24d92 100644
--- a/drivers/mtd/mtdblock.c
+++ b/drivers/mtd/mtdblock.c
@@ -29,6 +29,8 @@ static struct mtdblk_dev {
         enum { STATE_EMPTY, STATE_CLEAN, STATE_DIRTY } cache_state;
 } *mtdblks[MAX_MTD_DEVICES];
 
+static struct mutex mtdblks_lock;
+
 /*
  * Cache stuff...
  *
@@ -270,15 +272,19 @@ static int mtdblock_open(struct mtd_blktrans_dev *mbd)
 
         DEBUG(MTD_DEBUG_LEVEL1,"mtdblock_open\n");
 
+        mutex_lock(&mtdblks_lock);
         if (mtdblks[dev]) {
                 mtdblks[dev]->count++;
+                mutex_unlock(&mtdblks_lock);
                 return 0;
         }
 
         /* OK, it's not open. Create cache info for it */
         mtdblk = kzalloc(sizeof(struct mtdblk_dev), GFP_KERNEL);
-        if (!mtdblk)
+        if (!mtdblk) {
+                mutex_unlock(&mtdblks_lock);
                 return -ENOMEM;
+        }
 
         mtdblk->count = 1;
         mtdblk->mtd = mtd;
@@ -291,6 +297,7 @@ static int mtdblock_open(struct mtd_blktrans_dev *mbd)
         }
 
         mtdblks[dev] = mtdblk;
+        mutex_unlock(&mtdblks_lock);
 
         DEBUG(MTD_DEBUG_LEVEL1, "ok\n");
 
@@ -304,6 +311,8 @@ static int mtdblock_release(struct mtd_blktrans_dev *mbd)
 
         DEBUG(MTD_DEBUG_LEVEL1, "mtdblock_release\n");
 
+        mutex_lock(&mtdblks_lock);
+
         mutex_lock(&mtdblk->cache_mutex);
         write_cached_data(mtdblk);
         mutex_unlock(&mtdblk->cache_mutex);
@@ -316,6 +325,9 @@ static int mtdblock_release(struct mtd_blktrans_dev *mbd)
                 vfree(mtdblk->cache_data);
                 kfree(mtdblk);
         }
+
+        mutex_unlock(&mtdblks_lock);
+
         DEBUG(MTD_DEBUG_LEVEL1, "ok\n");
 
         return 0;
@@ -376,6 +388,8 @@ static struct mtd_blktrans_ops mtdblock_tr = {
 
 static int __init init_mtdblock(void)
 {
+        mutex_init(&mtdblks_lock);
+
         return register_mtd_blktrans(&mtdblock_tr);
 }
 
diff --git a/drivers/mtd/mtdcore.c b/drivers/mtd/mtdcore.c
index fac54a3fa3f1..00ebf7af7467 100644
--- a/drivers/mtd/mtdcore.c
+++ b/drivers/mtd/mtdcore.c
@@ -65,8 +65,8 @@ static void mtd_release(struct device *dev)
 static int mtd_cls_suspend(struct device *dev, pm_message_t state)
 {
         struct mtd_info *mtd = dev_to_mtd(dev);
-        
-        if (mtd->suspend)
+
+        if (mtd && mtd->suspend)
                 return mtd->suspend(mtd);
         else
                 return 0;
@@ -76,7 +76,7 @@ static int mtd_cls_resume(struct device *dev)
 {
         struct mtd_info *mtd = dev_to_mtd(dev);
         
-        if (mtd->resume)
+        if (mtd && mtd->resume)
                 mtd->resume(mtd);
         return 0;
 }
@@ -298,6 +298,7 @@ int add_mtd_device(struct mtd_info *mtd)
                         mtd->dev.class = &mtd_class;
                         mtd->dev.devt = MTD_DEVT(i);
                         dev_set_name(&mtd->dev, "mtd%d", i);
+                        dev_set_drvdata(&mtd->dev, mtd);
                         if (device_register(&mtd->dev) != 0) {
                                 mtd_table[i] = NULL;
                                 break;
diff --git a/drivers/mtd/onenand/omap2.c b/drivers/mtd/onenand/omap2.c
index 38d656b9b2ee..0108ed42e877 100644
--- a/drivers/mtd/onenand/omap2.c
+++ b/drivers/mtd/onenand/omap2.c
@@ -266,7 +266,7 @@ static inline int omap2_onenand_bufferram_offset(struct mtd_info *mtd, int area)
 
         if (ONENAND_CURRENT_BUFFERRAM(this)) {
                 if (area == ONENAND_DATARAM)
-                        return mtd->writesize;
+                        return this->writesize;
                 if (area == ONENAND_SPARERAM)
                         return mtd->oobsize;
         }
@@ -770,6 +770,7 @@ static int __devexit omap2_onenand_remove(struct platform_device *pdev)
         }
         iounmap(c->onenand.base);
         release_mem_region(c->phys_base, ONENAND_IO_SIZE);
+        gpmc_cs_free(c->gpmc_cs);
         kfree(c);
 
         return 0;
diff --git a/fs/jffs2/file.c b/fs/jffs2/file.c
index 5edc2bf20581..23c947539864 100644
--- a/fs/jffs2/file.c
+++ b/fs/jffs2/file.c
@@ -99,7 +99,7 @@ static int jffs2_do_readpage_nolock (struct inode *inode, struct page *pg)
         kunmap(pg);
 
         D2(printk(KERN_DEBUG "readpage finished\n"));
-        return 0;
+        return ret;
 }
 
 int jffs2_do_readpage_unlock(struct inode *inode, struct page *pg)
diff --git a/include/linux/mtd/mtd.h b/include/linux/mtd/mtd.h
index 5675b63a0631..0f32a9b6ff55 100644
--- a/include/linux/mtd/mtd.h
+++ b/include/linux/mtd/mtd.h
@@ -251,7 +251,7 @@ struct mtd_info {
 
 static inline struct mtd_info *dev_to_mtd(struct device *dev)
 {
-        return dev ? container_of(dev, struct mtd_info, dev) : NULL;
+        return dev ? dev_get_drvdata(dev) : NULL;
 }
 
 static inline uint32_t mtd_div_by_eb(uint64_t sz, struct mtd_info *mtd)
diff --git a/include/linux/mtd/partitions.h b/include/linux/mtd/partitions.h
index af6dcb992bc3..b70313d33ff8 100644
--- a/include/linux/mtd/partitions.h
+++ b/include/linux/mtd/partitions.h
@@ -47,6 +47,8 @@ struct mtd_partition {
 #define MTDPART_SIZ_FULL        (0)
 
 
+struct mtd_info;
+
 int add_mtd_partitions(struct mtd_info *, const struct mtd_partition *, int);
 int del_mtd_partitions(struct mtd_info *);