Merge branch 'master' into upstream

12 files changed, 255 insertions, 100 deletions

diff --git a/drivers/atm/he.c b/drivers/atm/he.c
index dd96123a2b7..ffcb9fd31c3 100644
--- a/drivers/atm/he.c
+++ b/drivers/atm/he.c
@@ -1928,7 +1928,9 @@ he_service_rbrq(struct he_dev *he_dev, int group)
 #ifdef notdef
 		ATM_SKB(skb)->vcc = vcc;
 #endif
+		spin_unlock(&he_dev->global_lock);
 		vcc->push(vcc, skb);
+		spin_lock(&he_dev->global_lock);
 
 		atomic_inc(&vcc->stats->rx);
 
diff --git a/drivers/mtd/chips/cfi_cmdset_0001.c b/drivers/mtd/chips/cfi_cmdset_0001.c
index 39edb8250fb..7ea49a0d5ec 100644
--- a/drivers/mtd/chips/cfi_cmdset_0001.c
+++ b/drivers/mtd/chips/cfi_cmdset_0001.c
@@ -908,7 +908,7 @@ static void __xipram xip_enable(struct map_info *map, struct flchip *chip,
 
 static int __xipram xip_wait_for_operation(
 		struct map_info *map, struct flchip *chip,
-		unsigned long adr, int *chip_op_time )
+		unsigned long adr, unsigned int chip_op_time )
 {
 	struct cfi_private *cfi = map->fldrv_priv;
 	struct cfi_pri_intelext *cfip = cfi->cmdset_priv;
@@ -917,7 +917,7 @@ static int __xipram xip_wait_for_operation(
 	flstate_t oldstate, newstate;
 
        	start = xip_currtime();
-	usec = *chip_op_time * 8;
+	usec = chip_op_time * 8;
 	if (usec == 0)
 		usec = 500000;
 	done = 0;
@@ -1027,8 +1027,8 @@ static int __xipram xip_wait_for_operation(
 #define XIP_INVAL_CACHED_RANGE(map, from, size)  \
 	INVALIDATE_CACHED_RANGE(map, from, size)
 
-#define INVAL_CACHE_AND_WAIT(map, chip, cmd_adr, inval_adr, inval_len, p_usec) \
-	xip_wait_for_operation(map, chip, cmd_adr, p_usec)
+#define INVAL_CACHE_AND_WAIT(map, chip, cmd_adr, inval_adr, inval_len, usec) \
+	xip_wait_for_operation(map, chip, cmd_adr, usec)
 
 #else
 
@@ -1040,64 +1040,64 @@ static int __xipram xip_wait_for_operation(
 static int inval_cache_and_wait_for_operation(
 		struct map_info *map, struct flchip *chip,
 		unsigned long cmd_adr, unsigned long inval_adr, int inval_len,
-		int *chip_op_time )
+		unsigned int chip_op_time)
 {
 	struct cfi_private *cfi = map->fldrv_priv;
 	map_word status, status_OK = CMD(0x80);
-	int z, chip_state = chip->state;
-	unsigned long timeo;
+	int chip_state = chip->state;
+	unsigned int timeo, sleep_time;
 
 	spin_unlock(chip->mutex);
 	if (inval_len)
 		INVALIDATE_CACHED_RANGE(map, inval_adr, inval_len);
-	if (*chip_op_time)
-		cfi_udelay(*chip_op_time);
 	spin_lock(chip->mutex);
 
-	timeo = *chip_op_time * 8 * HZ / 1000000;
-	if (timeo < HZ/2)
-		timeo = HZ/2;
-	timeo += jiffies;
+	/* set our timeout to 8 times the expected delay */
+	timeo = chip_op_time * 8;
+	if (!timeo)
+		timeo = 500000;
+	sleep_time = chip_op_time / 2;
 
-	z = 0;
 	for (;;) {
-		if (chip->state != chip_state) {
-			/* Someone's suspended the operation: sleep */
-			DECLARE_WAITQUEUE(wait, current);
-
-			set_current_state(TASK_UNINTERRUPTIBLE);
-			add_wait_queue(&chip->wq, &wait);
-			spin_unlock(chip->mutex);
-			schedule();
-			remove_wait_queue(&chip->wq, &wait);
-			timeo = jiffies + (HZ / 2); /* FIXME */
-			spin_lock(chip->mutex);
-			continue;
-		}
-
 		status = map_read(map, cmd_adr);
 		if (map_word_andequal(map, status, status_OK, status_OK))
 			break;
 
-		/* OK Still waiting */
-		if (time_after(jiffies, timeo)) {
+		if (!timeo) {
 			map_write(map, CMD(0x70), cmd_adr);
 			chip->state = FL_STATUS;
 			return -ETIME;
 		}
 
-		/* Latency issues. Drop the lock, wait a while and retry */
-		z++;
+		/* OK Still waiting. Drop the lock, wait a while and retry. */
 		spin_unlock(chip->mutex);
-		cfi_udelay(1);
+		if (sleep_time >= 1000000/HZ) {
+			/*
+			 * Half of the normal delay still remaining
+			 * can be performed with a sleeping delay instead
+			 * of busy waiting.
+			 */
+			msleep(sleep_time/1000);
+			timeo -= sleep_time;
+			sleep_time = 1000000/HZ;
+		} else {
+			udelay(1);
+			cond_resched();
+			timeo--;
+		}
 		spin_lock(chip->mutex);
-	}
 
-	if (!z) {
-		if (!--(*chip_op_time))
-			*chip_op_time = 1;
-	} else if (z > 1)
-		++(*chip_op_time);
+		if (chip->state != chip_state) {
+			/* Someone's suspended the operation: sleep */
+			DECLARE_WAITQUEUE(wait, current);
+			set_current_state(TASK_UNINTERRUPTIBLE);
+			add_wait_queue(&chip->wq, &wait);
+			spin_unlock(chip->mutex);
+			schedule();
+			remove_wait_queue(&chip->wq, &wait);
+			spin_lock(chip->mutex);
+		}
+	}
 
 	/* Done and happy. */
  	chip->state = FL_STATUS;
@@ -1107,8 +1107,7 @@ static int inval_cache_and_wait_for_operation(
 #endif
 
 #define WAIT_TIMEOUT(map, chip, adr, udelay) \
-	({ int __udelay = (udelay); \
-	   INVAL_CACHE_AND_WAIT(map, chip, adr, 0, 0, &__udelay); })
+	INVAL_CACHE_AND_WAIT(map, chip, adr, 0, 0, udelay);
 
 
 static int do_point_onechip (struct map_info *map, struct flchip *chip, loff_t adr, size_t len)
@@ -1332,7 +1331,7 @@ static int __xipram do_write_oneword(struct map_info *map, struct flchip *chip,
 
 	ret = INVAL_CACHE_AND_WAIT(map, chip, adr,
 				   adr, map_bankwidth(map),
-				   &chip->word_write_time);
+				   chip->word_write_time);
 	if (ret) {
 		xip_enable(map, chip, adr);
 		printk(KERN_ERR "%s: word write error (status timeout)\n", map->name);
@@ -1569,7 +1568,7 @@ static int __xipram do_write_buffer(struct map_info *map, struct flchip *chip,
 
 	ret = INVAL_CACHE_AND_WAIT(map, chip, cmd_adr,
 				   adr, len,
-				   &chip->buffer_write_time);
+				   chip->buffer_write_time);
 	if (ret) {
 		map_write(map, CMD(0x70), cmd_adr);
 		chip->state = FL_STATUS;
@@ -1704,7 +1703,7 @@ static int __xipram do_erase_oneblock(struct map_info *map, struct flchip *chip,
 
 	ret = INVAL_CACHE_AND_WAIT(map, chip, adr,
 				   adr, len,
-				   &chip->erase_time);
+				   chip->erase_time);
 	if (ret) {
 		map_write(map, CMD(0x70), adr);
 		chip->state = FL_STATUS;
diff --git a/drivers/mtd/chips/cfi_cmdset_0002.c b/drivers/mtd/chips/cfi_cmdset_0002.c
index 9885726a16e..a482e8922de 100644
--- a/drivers/mtd/chips/cfi_cmdset_0002.c
+++ b/drivers/mtd/chips/cfi_cmdset_0002.c
@@ -45,9 +45,11 @@
 #define MAX_WORD_RETRIES 3
 
 #define MANUFACTURER_AMD	0x0001
+#define MANUFACTURER_ATMEL	0x001F
 #define MANUFACTURER_SST	0x00BF
 #define SST49LF004B	        0x0060
 #define SST49LF008A		0x005a
+#define AT49BV6416		0x00d6
 
 static int cfi_amdstd_read (struct mtd_info *, loff_t, size_t, size_t *, u_char *);
 static int cfi_amdstd_write_words(struct mtd_info *, loff_t, size_t, size_t *, const u_char *);
@@ -68,6 +70,9 @@ static int get_chip(struct map_info *map, struct flchip *chip, unsigned long adr
 static void put_chip(struct map_info *map, struct flchip *chip, unsigned long adr);
 #include "fwh_lock.h"
 
+static int cfi_atmel_lock(struct mtd_info *mtd, loff_t ofs, size_t len);
+static int cfi_atmel_unlock(struct mtd_info *mtd, loff_t ofs, size_t len);
+
 static struct mtd_chip_driver cfi_amdstd_chipdrv = {
 	.probe		= NULL, /* Not usable directly */
 	.destroy	= cfi_amdstd_destroy,
@@ -161,6 +166,26 @@ static void fixup_use_write_buffers(struct mtd_info *mtd, void *param)
 	}
 }
 
+/* Atmel chips don't use the same PRI format as AMD chips */
+static void fixup_convert_atmel_pri(struct mtd_info *mtd, void *param)
+{
+	struct map_info *map = mtd->priv;
+	struct cfi_private *cfi = map->fldrv_priv;
+	struct cfi_pri_amdstd *extp = cfi->cmdset_priv;
+	struct cfi_pri_atmel atmel_pri;
+
+	memcpy(&atmel_pri, extp, sizeof(atmel_pri));
+	memset((char *)extp + 5, 0, sizeof(*extp) - 5);
+
+	if (atmel_pri.Features & 0x02)
+		extp->EraseSuspend = 2;
+
+	if (atmel_pri.BottomBoot)
+		extp->TopBottom = 2;
+	else
+		extp->TopBottom = 3;
+}
+
 static void fixup_use_secsi(struct mtd_info *mtd, void *param)
 {
 	/* Setup for chips with a secsi area */
@@ -179,6 +204,16 @@ static void fixup_use_erase_chip(struct mtd_info *mtd, void *param)
 
 }
 
+/*
+ * Some Atmel chips (e.g. the AT49BV6416) power-up with all sectors
+ * locked by default.
+ */
+static void fixup_use_atmel_lock(struct mtd_info *mtd, void *param)
+{
+	mtd->lock = cfi_atmel_lock;
+	mtd->unlock = cfi_atmel_unlock;
+}
+
 static struct cfi_fixup cfi_fixup_table[] = {
 #ifdef AMD_BOOTLOC_BUG
 	{ CFI_MFR_AMD, CFI_ID_ANY, fixup_amd_bootblock, NULL },
@@ -192,6 +227,7 @@ static struct cfi_fixup cfi_fixup_table[] = {
 #if !FORCE_WORD_WRITE
 	{ CFI_MFR_ANY, CFI_ID_ANY, fixup_use_write_buffers, NULL, },
 #endif
+	{ CFI_MFR_ATMEL, CFI_ID_ANY, fixup_convert_atmel_pri, NULL },
 	{ 0, 0, NULL, NULL }
 };
 static struct cfi_fixup jedec_fixup_table[] = {
@@ -207,6 +243,7 @@ static struct cfi_fixup fixup_table[] = {
 	 * we know that is the case.
 	 */
 	{ CFI_MFR_ANY, CFI_ID_ANY, fixup_use_erase_chip, NULL },
+	{ CFI_MFR_ATMEL, AT49BV6416, fixup_use_atmel_lock, NULL },
 	{ 0, 0, NULL, NULL }
 };
 
@@ -1607,6 +1644,80 @@ static int cfi_amdstd_erase_chip(struct mtd_info *mtd, struct erase_info *instr)
 	return 0;
 }
 
+static int do_atmel_lock(struct map_info *map, struct flchip *chip,
+			 unsigned long adr, int len, void *thunk)
+{
+	struct cfi_private *cfi = map->fldrv_priv;
+	int ret;
+
+	spin_lock(chip->mutex);
+	ret = get_chip(map, chip, adr + chip->start, FL_LOCKING);
+	if (ret)
+		goto out_unlock;
+	chip->state = FL_LOCKING;
+
+	DEBUG(MTD_DEBUG_LEVEL3, "MTD %s(): LOCK 0x%08lx len %d\n",
+	      __func__, adr, len);
+
+	cfi_send_gen_cmd(0xAA, cfi->addr_unlock1, chip->start, map, cfi,
+			 cfi->device_type, NULL);
+	cfi_send_gen_cmd(0x55, cfi->addr_unlock2, chip->start, map, cfi,
+			 cfi->device_type, NULL);
+	cfi_send_gen_cmd(0x80, cfi->addr_unlock1, chip->start, map, cfi,
+			 cfi->device_type, NULL);
+	cfi_send_gen_cmd(0xAA, cfi->addr_unlock1, chip->start, map, cfi,
+			 cfi->device_type, NULL);
+	cfi_send_gen_cmd(0x55, cfi->addr_unlock2, chip->start, map, cfi,
+			 cfi->device_type, NULL);
+	map_write(map, CMD(0x40), chip->start + adr);
+
+	chip->state = FL_READY;
+	put_chip(map, chip, adr + chip->start);
+	ret = 0;
+
+out_unlock:
+	spin_unlock(chip->mutex);
+	return ret;
+}
+
+static int do_atmel_unlock(struct map_info *map, struct flchip *chip,
+			   unsigned long adr, int len, void *thunk)
+{
+	struct cfi_private *cfi = map->fldrv_priv;
+	int ret;
+
+	spin_lock(chip->mutex);
+	ret = get_chip(map, chip, adr + chip->start, FL_UNLOCKING);
+	if (ret)
+		goto out_unlock;
+	chip->state = FL_UNLOCKING;
+
+	DEBUG(MTD_DEBUG_LEVEL3, "MTD %s(): LOCK 0x%08lx len %d\n",
+	      __func__, adr, len);
+
+	cfi_send_gen_cmd(0xAA, cfi->addr_unlock1, chip->start, map, cfi,
+			 cfi->device_type, NULL);
+	map_write(map, CMD(0x70), adr);
+
+	chip->state = FL_READY;
+	put_chip(map, chip, adr + chip->start);
+	ret = 0;
+
+out_unlock:
+	spin_unlock(chip->mutex);
+	return ret;
+}
+
+static int cfi_atmel_lock(struct mtd_info *mtd, loff_t ofs, size_t len)
+{
+	return cfi_varsize_frob(mtd, do_atmel_lock, ofs, len, NULL);
+}
+
+static int cfi_atmel_unlock(struct mtd_info *mtd, loff_t ofs, size_t len)
+{
+	return cfi_varsize_frob(mtd, do_atmel_unlock, ofs, len, NULL);
+}
+
 
 static void cfi_amdstd_sync (struct mtd_info *mtd)
 {
diff --git a/drivers/mtd/chips/jedec_probe.c b/drivers/mtd/chips/jedec_probe.c
index 8f39d0a3143..1154dac715a 100644
--- a/drivers/mtd/chips/jedec_probe.c
+++ b/drivers/mtd/chips/jedec_probe.c
@@ -111,6 +111,7 @@
 #define MX29LV040C	0x004F
 #define MX29LV160T	0x22C4
 #define MX29LV160B	0x2249
+#define MX29F040	0x00A4
 #define MX29F016	0x00AD
 #define MX29F002T	0x00B0
 #define MX29F004T	0x0045
@@ -1172,6 +1173,19 @@ static const struct amd_flash_info jedec_table[] = {
 		}
 	}, {
 		.mfr_id		= MANUFACTURER_MACRONIX,
+		.dev_id		= MX29F040,
+		.name		= "Macronix MX29F040",
+		.uaddr		= {
+			[0] = MTD_UADDR_0x0555_0x02AA /* x8 */
+		},
+		.DevSize	= SIZE_512KiB,
+		.CmdSet		= P_ID_AMD_STD,
+		.NumEraseRegions= 1,
+		.regions	= {
+			ERASEINFO(0x10000,8),
+		}
+        }, {
+		.mfr_id		= MANUFACTURER_MACRONIX,
 		.dev_id		= MX29F016,
 		.name		= "Macronix MX29F016",
 		.uaddr		= {
diff --git a/drivers/mtd/devices/block2mtd.c b/drivers/mtd/devices/block2mtd.c
index ede3561be87..401c6a294ba 100644
--- a/drivers/mtd/devices/block2mtd.c
+++ b/drivers/mtd/devices/block2mtd.c
@@ -18,6 +18,7 @@
 #include <linux/mtd/mtd.h>
 #include <linux/buffer_head.h>
 #include <linux/mutex.h>
+#include <linux/mount.h>
 
 #define VERSION "$Revision: 1.30 $"
 
@@ -236,6 +237,8 @@ static int _block2mtd_write(struct block2mtd_dev *dev, const u_char *buf,
 	}
 	return 0;
 }
+
+
 static int block2mtd_write(struct mtd_info *mtd, loff_t to, size_t len,
 		size_t *retlen, const u_char *buf)
 {
@@ -299,6 +302,19 @@ static struct block2mtd_dev *add_device(char *devname, int erase_size)
 
 	/* Get a handle on the device */
 	bdev = open_bdev_excl(devname, O_RDWR, NULL);
+#ifndef MODULE
+	if (IS_ERR(bdev)) {
+
+		/* We might not have rootfs mounted at this point. Try
+		   to resolve the device name by other means. */
+
+		dev_t dev = name_to_dev_t(devname);
+		if (dev != 0) {
+			bdev = open_by_devnum(dev, FMODE_WRITE | FMODE_READ);
+		}
+	}
+#endif
+
 	if (IS_ERR(bdev)) {
 		ERROR("error: cannot open device %s", devname);
 		goto devinit_err;
@@ -393,26 +409,6 @@ static int parse_num(size_t *num, const char *token)
 }
 
 
-static int parse_name(char **pname, const char *token, size_t limit)
-{
-	size_t len;
-	char *name;
-
-	len = strlen(token) + 1;
-	if (len > limit)
-		return -ENOSPC;
-
-	name = kmalloc(len, GFP_KERNEL);
-	if (!name)
-		return -ENOMEM;
-
-	strcpy(name, token);
-
-	*pname = name;
-	return 0;
-}
-
-
 static inline void kill_final_newline(char *str)
 {
 	char *newline = strrchr(str, '\n');
@@ -426,9 +422,15 @@ static inline void kill_final_newline(char *str)
 	return 0;				\
 } while (0)
 
-static int block2mtd_setup(const char *val, struct kernel_param *kp)
+#ifndef MODULE
+static int block2mtd_init_called = 0;
+static __initdata char block2mtd_paramline[80 + 12]; /* 80 for device, 12 for erase size */
+#endif
+
+
+static int block2mtd_setup2(const char *val)
 {
-	char buf[80+12]; /* 80 for device, 12 for erase size */
+	char buf[80 + 12]; /* 80 for device, 12 for erase size */
 	char *str = buf;
 	char *token[2];
 	char *name;
@@ -450,13 +452,9 @@ static int block2mtd_setup(const char *val, struct kernel_param *kp)
 	if (!token[0])
 		parse_err("no argument");
 
-	ret = parse_name(&name, token[0], 80);
-	if (ret == -ENOMEM)
-		parse_err("out of memory");
-	if (ret == -ENOSPC)
-		parse_err("name too long");
-	if (ret)
-		return 0;
+	name = token[0];
+	if (strlen(name) + 1 > 80)
+		parse_err("device name too long");
 
 	if (token[1]) {
 		ret = parse_num(&erase_size, token[1]);
@@ -472,13 +470,48 @@ static int block2mtd_setup(const char *val, struct kernel_param *kp)
 }
 
 
+static int block2mtd_setup(const char *val, struct kernel_param *kp)
+{
+#ifdef MODULE
+	return block2mtd_setup2(val);
+#else
+	/* If more parameters are later passed in via
+	   /sys/module/block2mtd/parameters/block2mtd
+	   and block2mtd_init() has already been called,
+	   we can parse the argument now. */
+
+	if (block2mtd_init_called)
+		return block2mtd_setup2(val);
+
+	/* During early boot stage, we only save the parameters
+	   here. We must parse them later: if the param passed
+	   from kernel boot command line, block2mtd_setup() is
+	   called so early that it is not possible to resolve
+	   the device (even kmalloc() fails). Deter that work to
+	   block2mtd_setup2(). */
+
+	strlcpy(block2mtd_paramline, val, sizeof(block2mtd_paramline));
+
+	return 0;
+#endif
+}
+
+
 module_param_call(block2mtd, block2mtd_setup, NULL, NULL, 0200);
 MODULE_PARM_DESC(block2mtd, "Device to use. \"block2mtd=<dev>[,<erasesize>]\"");
 
 static int __init block2mtd_init(void)
 {
+	int ret = 0;
 	INFO("version " VERSION);
-	return 0;
+
+#ifndef MODULE
+	if (strlen(block2mtd_paramline))
+		ret = block2mtd_setup2(block2mtd_paramline);
+	block2mtd_init_called = 1;
+#endif
+
+	return ret;
 }
 
 
diff --git a/drivers/mtd/devices/m25p80.c b/drivers/mtd/devices/m25p80.c
index a8466141e91..ef4a731ca5c 100644
--- a/drivers/mtd/devices/m25p80.c
+++ b/drivers/mtd/devices/m25p80.c
@@ -406,13 +406,13 @@ struct flash_info {
 
 static struct flash_info __devinitdata m25p_data [] = {
 	/* REVISIT: fill in JEDEC ids, for parts that have them */
-	{ "m25p05", 0x05, 0x0000, 32 * 1024, 2 },
-	{ "m25p10", 0x10, 0x0000, 32 * 1024, 4 },
-	{ "m25p20", 0x11, 0x0000, 64 * 1024, 4 },
-	{ "m25p40", 0x12, 0x0000, 64 * 1024, 8 },
+	{ "m25p05", 0x05, 0x2010, 32 * 1024, 2 },
+	{ "m25p10", 0x10, 0x2011, 32 * 1024, 4 },
+	{ "m25p20", 0x11, 0x2012, 64 * 1024, 4 },
+	{ "m25p40", 0x12, 0x2013, 64 * 1024, 8 },
 	{ "m25p80", 0x13, 0x0000, 64 * 1024, 16 },
-	{ "m25p16", 0x14, 0x0000, 64 * 1024, 32 },
-	{ "m25p32", 0x15, 0x0000, 64 * 1024, 64 },
+	{ "m25p16", 0x14, 0x2015, 64 * 1024, 32 },
+	{ "m25p32", 0x15, 0x2016, 64 * 1024, 64 },
 	{ "m25p64", 0x16, 0x2017, 64 * 1024, 128 },
 };
 
diff --git a/drivers/mtd/devices/pmc551.c b/drivers/mtd/devices/pmc551.c
index 6f9bbf6fee4..2c014970873 100644
--- a/drivers/mtd/devices/pmc551.c
+++ b/drivers/mtd/devices/pmc551.c
@@ -99,10 +99,6 @@
 #include <asm/system.h>
 #include <linux/pci.h>
 
-#ifndef CONFIG_PCI
-#error Enable PCI in your kernel config
-#endif
-
 #include <linux/mtd/mtd.h>
 #include <linux/mtd/pmc551.h>
 #include <linux/mtd/compatmac.h>
diff --git a/drivers/mtd/maps/Kconfig b/drivers/mtd/maps/Kconfig
index 83d0b2a5252..64d1b6a6c92 100644
--- a/drivers/mtd/maps/Kconfig
+++ b/drivers/mtd/maps/Kconfig
@@ -13,13 +13,13 @@ config MTD_COMPLEX_MAPPINGS
 
 config MTD_PHYSMAP
 	tristate "CFI Flash device in physical memory map"
-	depends on MTD_CFI
+	depends on MTD_CFI || MTD_JEDECPROBE || MTD_ROM
 	help
-	  This provides a 'mapping' driver which allows the CFI probe and
-	  command set driver code to communicate with flash chips which
-	  are mapped physically into the CPU's memory. You will need to
-	  configure the physical address and size of the flash chips on
-	  your particular board as well as the bus width, either statically
+	  This provides a 'mapping' driver which allows the NOR Flash and
+	  ROM driver code to communicate with chips which are mapped
+	  physically into the CPU's memory. You will need to configure
+	  the physical address and size of the flash chips on your
+	  particular board as well as the bus width, either statically
 	  with config options or at run-time.
 
 config MTD_PHYSMAP_START
diff --git a/drivers/mtd/mtdchar.c b/drivers/mtd/mtdchar.c
index fb8b4f7e48d..5b6acfcb2b8 100644
--- a/drivers/mtd/mtdchar.c
+++ b/drivers/mtd/mtdchar.c
@@ -62,15 +62,12 @@ static loff_t mtd_lseek (struct file *file, loff_t offset, int orig)
 	struct mtd_info *mtd = mfi->mtd;
 
 	switch (orig) {
-	case 0:
-		/* SEEK_SET */
+	case SEEK_SET:
 		break;
-	case 1:
-		/* SEEK_CUR */
+	case SEEK_CUR:
 		offset += file->f_pos;
 		break;
-	case 2:
-		/* SEEK_END */
+	case SEEK_END:
 		offset += mtd->size;
 		break;
 	default:
diff --git a/drivers/mtd/nand/Kconfig b/drivers/mtd/nand/Kconfig
index 3db77eec0ed..c99302ed382 100644
--- a/drivers/mtd/nand/Kconfig
+++ b/drivers/mtd/nand/Kconfig
@@ -11,7 +11,7 @@ config MTD_NAND
 	help
 	  This enables support for accessing all type of NAND flash
 	  devices. For further information see
-	  <http://www.linux-mtd.infradead.org/tech/nand.html>.
+	  <http://www.linux-mtd.infradead.org/doc/nand.html>.
 
 config MTD_NAND_VERIFY_WRITE
 	bool "Verify NAND page writes"
diff --git a/drivers/mtd/nand/nand_base.c b/drivers/mtd/nand/nand_base.c
index 0a54d003ef3..975b2ef6112 100644
--- a/drivers/mtd/nand/nand_base.c
+++ b/drivers/mtd/nand/nand_base.c
@@ -2224,7 +2224,7 @@ static struct nand_flash_dev *nand_get_flash_type(struct mtd_info *mtd,
 	}
 
 	/* Try to identify manufacturer */
-	for (maf_idx = 0; nand_manuf_ids[maf_idx].id != 0x0; maf_id++) {
+	for (maf_idx = 0; nand_manuf_ids[maf_idx].id != 0x0; maf_idx++) {
 		if (nand_manuf_ids[maf_idx].id == *maf_id)
 			break;
 	}
diff --git a/drivers/mtd/nand/sharpsl.c b/drivers/mtd/nand/sharpsl.c
index fbeedc3184e..51c7288ab49 100644
--- a/drivers/mtd/nand/sharpsl.c
+++ b/drivers/mtd/nand/sharpsl.c
@@ -78,7 +78,7 @@ static struct mtd_partition sharpsl_nand_default_partition_info[] = {
 /*
  *	hardware specific access to control-lines
  *	ctrl:
- *	NAND_CNE: bit 0 -> bit 0 & 4
+ *	NAND_CNE: bit 0 -> ! bit 0 & 4
  *	NAND_CLE: bit 1 -> bit 1
  *	NAND_ALE: bit 2 -> bit 2
  *
@@ -92,7 +92,10 @@ static void sharpsl_nand_hwcontrol(struct mtd_info *mtd, int cmd,
 		unsigned char bits = ctrl & 0x07;
 
 		bits |= (ctrl & 0x01) << 4;
-		writeb((readb(FLASHCTL) & 0x17) | bits, FLASHCTL);
+
+		bits ^= 0x11;
+
+		writeb((readb(FLASHCTL) & ~0x17) | bits, FLASHCTL);
 	}
 
 	if (cmd != NAND_CMD_NONE)