mtd: do not duplicate length and offset checks in drivers
We already verify that offset and length are within the MTD device size
in the MTD API functions. Let's remove the duplicated checks in drivers.
This patch only affects the following API's:
'mtd_erase()'
'mtd_point()'
'mtd_unpoint()'
'mtd_get_unmapped_area()'
'mtd_read()'
'mtd_write()'
'mtd_panic_write()'
'mtd_lock()'
'mtd_unlock()'
'mtd_is_locked()'
'mtd_block_isbad()'
'mtd_block_markbad()'
This patch adds a bit of noise by removing too sparse empty lines, but this is
not too bad.
Signed-off-by: Artem Bityutskiy <artem.bityutskiy@linux.intel.com>
Signed-off-by: David Woodhouse <David.Woodhouse@intel.com>
diff --git a/drivers/mtd/chips/cfi_cmdset_0001.c b/drivers/mtd/chips/cfi_cmdset_0001.c
index 4d04551..27008ae 100644
--- a/drivers/mtd/chips/cfi_cmdset_0001.c
+++ b/drivers/mtd/chips/cfi_cmdset_0001.c
@@ -1324,7 +1324,7 @@
int chipnum;
int ret = 0;
- if (!map->virt || (from + len > mtd->size))
+ if (!map->virt)
return -EINVAL;
/* Now lock the chip(s) to POINT state */
diff --git a/drivers/mtd/chips/cfi_cmdset_0020.c b/drivers/mtd/chips/cfi_cmdset_0020.c
index 3861cca..160402f 100644
--- a/drivers/mtd/chips/cfi_cmdset_0020.c
+++ b/drivers/mtd/chips/cfi_cmdset_0020.c
@@ -904,12 +904,6 @@
int i, first;
struct mtd_erase_region_info *regions = mtd->eraseregions;
- if (instr->addr > mtd->size)
- return -EINVAL;
-
- if ((instr->len + instr->addr) > mtd->size)
- return -EINVAL;
-
/* Check that both start and end of the requested erase are
* aligned with the erasesize at the appropriate addresses.
*/
@@ -1155,9 +1149,6 @@
if (len & (mtd->erasesize -1))
return -EINVAL;
- if ((len + ofs) > mtd->size)
- return -EINVAL;
-
chipnum = ofs >> cfi->chipshift;
adr = ofs - (chipnum << cfi->chipshift);
diff --git a/drivers/mtd/chips/cfi_util.c b/drivers/mtd/chips/cfi_util.c
index 8e46405..f992418f 100644
--- a/drivers/mtd/chips/cfi_util.c
+++ b/drivers/mtd/chips/cfi_util.c
@@ -173,12 +173,6 @@
int i, first;
struct mtd_erase_region_info *regions = mtd->eraseregions;
- if (ofs > mtd->size)
- return -EINVAL;
-
- if ((len + ofs) > mtd->size)
- return -EINVAL;
-
/* Check that both start and end of the requested erase are
* aligned with the erasesize at the appropriate addresses.
*/
diff --git a/drivers/mtd/devices/block2mtd.c b/drivers/mtd/devices/block2mtd.c
index 0fccf14..4c2f84c 100644
--- a/drivers/mtd/devices/block2mtd.c
+++ b/drivers/mtd/devices/block2mtd.c
@@ -104,11 +104,6 @@
int offset = from & (PAGE_SIZE-1);
int cpylen;
- if (from > mtd->size)
- return -EINVAL;
- if (from + len > mtd->size)
- len = mtd->size - from;
-
if (retlen)
*retlen = 0;
@@ -190,10 +185,6 @@
if (!len)
return 0;
- if (to >= mtd->size)
- return -ENOSPC;
- if (to + len > mtd->size)
- len = mtd->size - to;
mutex_lock(&dev->write_mutex);
err = _block2mtd_write(dev, buf, to, len, retlen);
diff --git a/drivers/mtd/devices/doc2000.c b/drivers/mtd/devices/doc2000.c
index 115d890..ee4ee0b 100644
--- a/drivers/mtd/devices/doc2000.c
+++ b/drivers/mtd/devices/doc2000.c
@@ -602,10 +602,6 @@
int i, len256 = 0, ret=0;
size_t left = len;
- /* Don't allow read past end of device */
- if (from >= this->totlen)
- return -EINVAL;
-
mutex_lock(&this->lock);
*retlen = 0;
@@ -748,10 +744,6 @@
size_t left = len;
int status;
- /* Don't allow write past end of device */
- if (to >= this->totlen)
- return -EINVAL;
-
mutex_lock(&this->lock);
*retlen = 0;
diff --git a/drivers/mtd/devices/doc2001.c b/drivers/mtd/devices/doc2001.c
index b1185f9..1784415 100644
--- a/drivers/mtd/devices/doc2001.c
+++ b/drivers/mtd/devices/doc2001.c
@@ -383,10 +383,6 @@
void __iomem *docptr = this->virtadr;
struct Nand *mychip = &this->chips[from >> (this->chipshift)];
- /* Don't allow read past end of device */
- if (from >= this->totlen)
- return -EINVAL;
-
/* Don't allow a single read to cross a 512-byte block boundary */
if (from + len > ((from | 0x1ff) + 1))
len = ((from | 0x1ff) + 1) - from;
@@ -494,10 +490,6 @@
void __iomem *docptr = this->virtadr;
struct Nand *mychip = &this->chips[to >> (this->chipshift)];
- /* Don't allow write past end of device */
- if (to >= this->totlen)
- return -EINVAL;
-
#if 0
/* Don't allow a single write to cross a 512-byte block boundary */
if (to + len > ( (to | 0x1ff) + 1))
diff --git a/drivers/mtd/devices/doc2001plus.c b/drivers/mtd/devices/doc2001plus.c
index c9fbadd..a472bab 100644
--- a/drivers/mtd/devices/doc2001plus.c
+++ b/drivers/mtd/devices/doc2001plus.c
@@ -581,10 +581,6 @@
void __iomem * docptr = this->virtadr;
struct Nand *mychip = &this->chips[from >> (this->chipshift)];
- /* Don't allow read past end of device */
- if (from >= this->totlen)
- return -EINVAL;
-
/* Don't allow a single read to cross a 512-byte block boundary */
if (from + len > ((from | 0x1ff) + 1))
len = ((from | 0x1ff) + 1) - from;
@@ -700,10 +696,6 @@
void __iomem * docptr = this->virtadr;
struct Nand *mychip = &this->chips[to >> (this->chipshift)];
- /* Don't allow write past end of device */
- if (to >= this->totlen)
- return -EINVAL;
-
/* Don't allow writes which aren't exactly one block (512 bytes) */
if ((to & 0x1ff) || (len != 0x200))
return -EINVAL;
diff --git a/drivers/mtd/devices/lart.c b/drivers/mtd/devices/lart.c
index 6d6502c..c9ae601 100644
--- a/drivers/mtd/devices/lart.c
+++ b/drivers/mtd/devices/lart.c
@@ -367,9 +367,6 @@
printk (KERN_DEBUG "%s(addr = 0x%.8x, len = %d)\n", __func__, instr->addr, instr->len);
#endif
- /* sanity checks */
- if (instr->addr + instr->len > mtd->size) return (-EINVAL);
-
/*
* check that both start and end of the requested erase are
* aligned with the erasesize at the appropriate addresses.
@@ -442,7 +439,6 @@
/* sanity checks */
if (!len) return (0);
- if (from + len > mtd->size) return (-EINVAL);
/* we always read len bytes */
*retlen = len;
@@ -526,7 +522,6 @@
/* sanity checks */
if (!len) return (0);
- if (to + len > mtd->size) return (-EINVAL);
/* first, we write a 0xFF.... padded byte until we reach a dword boundary */
if (to & (BUSWIDTH - 1))
diff --git a/drivers/mtd/devices/m25p80.c b/drivers/mtd/devices/m25p80.c
index 8808da9..0955a8f 100644
--- a/drivers/mtd/devices/m25p80.c
+++ b/drivers/mtd/devices/m25p80.c
@@ -288,9 +288,6 @@
__func__, (long long)instr->addr,
(long long)instr->len);
- /* sanity checks */
- if (instr->addr + instr->len > flash->mtd.size)
- return -EINVAL;
div_u64_rem(instr->len, mtd->erasesize, &rem);
if (rem)
return -EINVAL;
@@ -353,9 +350,6 @@
if (!len)
return 0;
- if (from + len > flash->mtd.size)
- return -EINVAL;
-
spi_message_init(&m);
memset(t, 0, (sizeof t));
@@ -423,9 +417,6 @@
if (!len)
return(0);
- if (to + len > flash->mtd.size)
- return -EINVAL;
-
spi_message_init(&m);
memset(t, 0, (sizeof t));
@@ -515,9 +506,6 @@
if (!len)
return 0;
- if (to + len > flash->mtd.size)
- return -EINVAL;
-
spi_message_init(&m);
memset(t, 0, (sizeof t));
diff --git a/drivers/mtd/devices/ms02-nv.c b/drivers/mtd/devices/ms02-nv.c
index 3a05af5..182849d 100644
--- a/drivers/mtd/devices/ms02-nv.c
+++ b/drivers/mtd/devices/ms02-nv.c
@@ -59,12 +59,8 @@
{
struct ms02nv_private *mp = mtd->priv;
- if (from + len > mtd->size)
- return -EINVAL;
-
memcpy(buf, mp->uaddr + from, len);
*retlen = len;
-
return 0;
}
@@ -73,12 +69,8 @@
{
struct ms02nv_private *mp = mtd->priv;
- if (to + len > mtd->size)
- return -EINVAL;
-
memcpy(mp->uaddr + to, buf, len);
*retlen = len;
-
return 0;
}
diff --git a/drivers/mtd/devices/mtd_dataflash.c b/drivers/mtd/devices/mtd_dataflash.c
index fd4a9fc..fc5c781 100644
--- a/drivers/mtd/devices/mtd_dataflash.c
+++ b/drivers/mtd/devices/mtd_dataflash.c
@@ -164,9 +164,6 @@
dev_name(&spi->dev), (long long)instr->addr,
(long long)instr->len);
- /* Sanity checks */
- if (instr->addr + instr->len > mtd->size)
- return -EINVAL;
div_u64_rem(instr->len, priv->page_size, &rem);
if (rem)
return -EINVAL;
@@ -257,8 +254,6 @@
/* Sanity checks */
if (!len)
return 0;
- if (from + len > mtd->size)
- return -EINVAL;
/* Calculate flash page/byte address */
addr = (((unsigned)from / priv->page_size) << priv->page_offset)
@@ -333,8 +328,6 @@
/* Sanity checks */
if (!len)
return 0;
- if ((to + len) > mtd->size)
- return -EINVAL;
spi_message_init(&msg);
diff --git a/drivers/mtd/devices/mtdram.c b/drivers/mtd/devices/mtdram.c
index e1f017bf0..0e0e6ed 100644
--- a/drivers/mtd/devices/mtdram.c
+++ b/drivers/mtd/devices/mtdram.c
@@ -34,27 +34,18 @@
static int ram_erase(struct mtd_info *mtd, struct erase_info *instr)
{
- if (instr->addr + instr->len > mtd->size)
- return -EINVAL;
-
memset((char *)mtd->priv + instr->addr, 0xff, instr->len);
-
instr->state = MTD_ERASE_DONE;
mtd_erase_callback(instr);
-
return 0;
}
static int ram_point(struct mtd_info *mtd, loff_t from, size_t len,
size_t *retlen, void **virt, resource_size_t *phys)
{
- if (from + len > mtd->size)
- return -EINVAL;
-
/* can we return a physical address with this driver? */
if (phys)
return -EINVAL;
-
*virt = mtd->priv + from;
*retlen = len;
return 0;
@@ -81,11 +72,7 @@
static int ram_read(struct mtd_info *mtd, loff_t from, size_t len,
size_t *retlen, u_char *buf)
{
- if (from + len > mtd->size)
- return -EINVAL;
-
memcpy(buf, mtd->priv + from, len);
-
*retlen = len;
return 0;
}
@@ -93,11 +80,7 @@
static int ram_write(struct mtd_info *mtd, loff_t to, size_t len,
size_t *retlen, const u_char *buf)
{
- if (to + len > mtd->size)
- return -EINVAL;
-
memcpy((char *)mtd->priv + to, buf, len);
-
*retlen = len;
return 0;
}
diff --git a/drivers/mtd/devices/phram.c b/drivers/mtd/devices/phram.c
index 3803555..36add7c 100644
--- a/drivers/mtd/devices/phram.c
+++ b/drivers/mtd/devices/phram.c
@@ -38,29 +38,20 @@
{
u_char *start = mtd->priv;
- if (instr->addr + instr->len > mtd->size)
- return -EINVAL;
-
memset(start + instr->addr, 0xff, instr->len);
/* This'll catch a few races. Free the thing before returning :)
* I don't feel at all ashamed. This kind of thing is possible anyway
* with flash, but unlikely.
*/
-
instr->state = MTD_ERASE_DONE;
-
mtd_erase_callback(instr);
-
return 0;
}
static int phram_point(struct mtd_info *mtd, loff_t from, size_t len,
size_t *retlen, void **virt, resource_size_t *phys)
{
- if (from + len > mtd->size)
- return -EINVAL;
-
/* can we return a physical address with this driver? */
if (phys)
return -EINVAL;
@@ -80,14 +71,7 @@
{
u_char *start = mtd->priv;
- if (from >= mtd->size)
- return -EINVAL;
-
- if (len > mtd->size - from)
- len = mtd->size - from;
-
memcpy(buf, start + from, len);
-
*retlen = len;
return 0;
}
@@ -97,14 +81,7 @@
{
u_char *start = mtd->priv;
- if (to >= mtd->size)
- return -EINVAL;
-
- if (len > mtd->size - to)
- len = mtd->size - to;
-
memcpy(start + to, buf, len);
-
*retlen = len;
return 0;
}
diff --git a/drivers/mtd/devices/pmc551.c b/drivers/mtd/devices/pmc551.c
index 933127e..d394e06 100644
--- a/drivers/mtd/devices/pmc551.c
+++ b/drivers/mtd/devices/pmc551.c
@@ -116,16 +116,6 @@
#endif
end = instr->addr + instr->len - 1;
-
- /* Is it past the end? */
- if (end > mtd->size) {
-#ifdef CONFIG_MTD_PMC551_DEBUG
- printk(KERN_DEBUG "pmc551_erase() out of bounds (%ld > %ld)\n",
- (long)end, (long)mtd->size);
-#endif
- return -EINVAL;
- }
-
eoff_hi = end & ~(priv->asize - 1);
soff_hi = instr->addr & ~(priv->asize - 1);
eoff_lo = end & (priv->asize - 1);
@@ -179,14 +169,6 @@
printk(KERN_DEBUG "pmc551_point(%ld, %ld)\n", (long)from, (long)len);
#endif
- if (from + len > mtd->size) {
-#ifdef CONFIG_MTD_PMC551_DEBUG
- printk(KERN_DEBUG "pmc551_point() out of bounds (%ld > %ld)\n",
- (long)from + len, (long)mtd->size);
-#endif
- return -EINVAL;
- }
-
/* can we return a physical address with this driver? */
if (phys)
return -EINVAL;
@@ -230,16 +212,6 @@
#endif
end = from + len - 1;
-
- /* Is it past the end? */
- if (end > mtd->size) {
-#ifdef CONFIG_MTD_PMC551_DEBUG
- printk(KERN_DEBUG "pmc551_read() out of bounds (%ld > %ld)\n",
- (long)end, (long)mtd->size);
-#endif
- return -EINVAL;
- }
-
soff_hi = from & ~(priv->asize - 1);
eoff_hi = end & ~(priv->asize - 1);
soff_lo = from & (priv->asize - 1);
@@ -297,16 +269,6 @@
#endif
end = to + len - 1;
- /* Is it past the end? or did the u32 wrap? */
- if (end > mtd->size) {
-#ifdef CONFIG_MTD_PMC551_DEBUG
- printk(KERN_DEBUG "pmc551_write() out of bounds (end: %ld, "
- "size: %ld, to: %ld)\n", (long)end, (long)mtd->size,
- (long)to);
-#endif
- return -EINVAL;
- }
-
soff_hi = to & ~(priv->asize - 1);
eoff_hi = end & ~(priv->asize - 1);
soff_lo = to & (priv->asize - 1);
diff --git a/drivers/mtd/devices/slram.c b/drivers/mtd/devices/slram.c
index 9431ffc..842e489 100644
--- a/drivers/mtd/devices/slram.c
+++ b/drivers/mtd/devices/slram.c
@@ -84,21 +84,13 @@
{
slram_priv_t *priv = mtd->priv;
- if (instr->addr + instr->len > mtd->size) {
- return(-EINVAL);
- }
-
memset(priv->start + instr->addr, 0xff, instr->len);
-
/* This'll catch a few races. Free the thing before returning :)
* I don't feel at all ashamed. This kind of thing is possible anyway
* with flash, but unlikely.
*/
-
instr->state = MTD_ERASE_DONE;
-
mtd_erase_callback(instr);
-
return(0);
}
@@ -110,10 +102,6 @@
/* can we return a physical address with this driver? */
if (phys)
return -EINVAL;
-
- if (from + len > mtd->size)
- return -EINVAL;
-
*virt = priv->start + from;
*retlen = len;
return(0);
@@ -129,14 +117,7 @@
{
slram_priv_t *priv = mtd->priv;
- if (from > mtd->size)
- return -EINVAL;
-
- if (from + len > mtd->size)
- len = mtd->size - from;
-
memcpy(buf, priv->start + from, len);
-
*retlen = len;
return(0);
}
@@ -146,11 +127,7 @@
{
slram_priv_t *priv = mtd->priv;
- if (to + len > mtd->size)
- return -EINVAL;
-
memcpy(priv->start + to, buf, len);
-
*retlen = len;
return(0);
}
diff --git a/drivers/mtd/devices/spear_smi.c b/drivers/mtd/devices/spear_smi.c
index b80cb5b..2238ab9 100644
--- a/drivers/mtd/devices/spear_smi.c
+++ b/drivers/mtd/devices/spear_smi.c
@@ -510,10 +510,6 @@
if (!flash || !dev)
return -ENODEV;
- /* do not allow erase past end of device */
- if (e_info->addr + e_info->len > flash->mtd.size)
- return -EINVAL;
-
bank = flash->bank;
if (bank > dev->num_flashes - 1) {
dev_err(&dev->pdev->dev, "Invalid Bank Num");
@@ -573,10 +569,6 @@
if (!flash || !dev)
return -ENODEV;
- /* do not allow reads past end of device */
- if (from + len > flash->mtd.size)
- return -EINVAL;
-
if (flash->bank > dev->num_flashes - 1) {
dev_err(&dev->pdev->dev, "Invalid Bank Num");
return -EINVAL;
@@ -678,10 +670,6 @@
if (!len)
return 0;
- /* do not allow write past end of page */
- if (to + len > flash->mtd.size)
- return -EINVAL;
-
if (flash->bank > dev->num_flashes - 1) {
dev_err(&dev->pdev->dev, "Invalid Bank Num");
return -EINVAL;
diff --git a/drivers/mtd/devices/sst25l.c b/drivers/mtd/devices/sst25l.c
index 8b9ffaf..99d4a3c 100644
--- a/drivers/mtd/devices/sst25l.c
+++ b/drivers/mtd/devices/sst25l.c
@@ -175,9 +175,6 @@
int err;
/* Sanity checks */
- if (instr->addr + instr->len > flash->mtd.size)
- return -EINVAL;
-
if ((uint32_t)instr->len % mtd->erasesize)
return -EINVAL;
@@ -227,9 +224,6 @@
if (len == 0)
return 0;
- if (from + len > flash->mtd.size)
- return -EINVAL;
-
if (retlen)
*retlen = 0;
@@ -278,9 +272,6 @@
if (!len)
return 0;
- if (to + len > flash->mtd.size)
- return -EINVAL;
-
if ((uint32_t)to % mtd->writesize)
return -EINVAL;
diff --git a/drivers/mtd/lpddr/lpddr_cmds.c b/drivers/mtd/lpddr/lpddr_cmds.c
index de960b1..0f3731c 100644
--- a/drivers/mtd/lpddr/lpddr_cmds.c
+++ b/drivers/mtd/lpddr/lpddr_cmds.c
@@ -530,7 +530,7 @@
struct flchip *chip = &lpddr->chips[chipnum];
int ret = 0;
- if (!map->virt || (adr + len > mtd->size))
+ if (!map->virt)
return -EINVAL;
/* ofs: offset within the first chip that the first read should start */
@@ -692,9 +692,6 @@
ofs = instr->addr;
len = instr->len;
- if (ofs > mtd->size || (len + ofs) > mtd->size)
- return -EINVAL;
-
while (len > 0) {
ret = do_erase_oneblock(mtd, ofs);
if (ret)
diff --git a/drivers/mtd/mtdconcat.c b/drivers/mtd/mtdconcat.c
index d826a8a..1f20718 100644
--- a/drivers/mtd/mtdconcat.c
+++ b/drivers/mtd/mtdconcat.c
@@ -185,10 +185,6 @@
for (i = 0; i < count; i++)
total_len += vecs[i].iov_len;
- /* Do not allow write past end of device */
- if ((to + total_len) > mtd->size)
- return -EINVAL;
-
/* Check alignment */
if (mtd->writesize > 1) {
uint64_t __to = to;
@@ -406,12 +402,6 @@
if (!(mtd->flags & MTD_WRITEABLE))
return -EROFS;
- if (instr->addr > concat->mtd.size)
- return -EINVAL;
-
- if (instr->len + instr->addr > concat->mtd.size)
- return -EINVAL;
-
/*
* Check for proper erase block alignment of the to-be-erased area.
* It is easier to do this based on the super device's erase
@@ -538,9 +528,6 @@
struct mtd_concat *concat = CONCAT(mtd);
int i, err = -EINVAL;
- if ((len + ofs) > mtd->size)
- return -EINVAL;
-
for (i = 0; i < concat->num_subdev; i++) {
struct mtd_info *subdev = concat->subdev[i];
uint64_t size;
@@ -575,9 +562,6 @@
struct mtd_concat *concat = CONCAT(mtd);
int i, err = 0;
- if ((len + ofs) > mtd->size)
- return -EINVAL;
-
for (i = 0; i < concat->num_subdev; i++) {
struct mtd_info *subdev = concat->subdev[i];
uint64_t size;
@@ -650,9 +634,6 @@
if (!mtd_can_have_bb(concat->subdev[0]))
return res;
- if (ofs > mtd->size)
- return -EINVAL;
-
for (i = 0; i < concat->num_subdev; i++) {
struct mtd_info *subdev = concat->subdev[i];
@@ -673,9 +654,6 @@
struct mtd_concat *concat = CONCAT(mtd);
int i, err = -EINVAL;
- if (ofs > mtd->size)
- return -EINVAL;
-
for (i = 0; i < concat->num_subdev; i++) {
struct mtd_info *subdev = concat->subdev[i];
@@ -713,10 +691,6 @@
continue;
}
- /* we've found the subdev over which the mapping will reside */
- if (offset + len > subdev->size)
- return (unsigned long) -EINVAL;
-
return mtd_get_unmapped_area(subdev, len, offset, flags);
}
diff --git a/drivers/mtd/mtdpart.c b/drivers/mtd/mtdpart.c
index da8a0b2..fbe2c8a 100644
--- a/drivers/mtd/mtdpart.c
+++ b/drivers/mtd/mtdpart.c
@@ -65,11 +65,6 @@
int res;
stats = part->master->ecc_stats;
-
- if (from >= mtd->size)
- len = 0;
- else if (from + len > mtd->size)
- len = mtd->size - from;
res = mtd_read(part->master, from + part->offset, len, retlen, buf);
if (unlikely(res)) {
if (mtd_is_bitflip(res))
@@ -84,10 +79,7 @@
size_t *retlen, void **virt, resource_size_t *phys)
{
struct mtd_part *part = PART(mtd);
- if (from >= mtd->size)
- len = 0;
- else if (from + len > mtd->size)
- len = mtd->size - from;
+
return mtd_point(part->master, from + part->offset, len, retlen,
virt, phys);
}
@@ -182,10 +174,6 @@
struct mtd_part *part = PART(mtd);
if (!(mtd->flags & MTD_WRITEABLE))
return -EROFS;
- if (to >= mtd->size)
- len = 0;
- else if (to + len > mtd->size)
- len = mtd->size - to;
return mtd_write(part->master, to + part->offset, len, retlen, buf);
}
@@ -195,10 +183,6 @@
struct mtd_part *part = PART(mtd);
if (!(mtd->flags & MTD_WRITEABLE))
return -EROFS;
- if (to >= mtd->size)
- len = 0;
- else if (to + len > mtd->size)
- len = mtd->size - to;
return mtd_panic_write(part->master, to + part->offset, len, retlen,
buf);
}
@@ -248,8 +232,6 @@
int ret;
if (!(mtd->flags & MTD_WRITEABLE))
return -EROFS;
- if (instr->addr >= mtd->size)
- return -EINVAL;
instr->addr += part->offset;
ret = mtd_erase(part->master, instr);
if (ret) {
@@ -277,24 +259,18 @@
static int part_lock(struct mtd_info *mtd, loff_t ofs, uint64_t len)
{
struct mtd_part *part = PART(mtd);
- if ((len + ofs) > mtd->size)
- return -EINVAL;
return mtd_lock(part->master, ofs + part->offset, len);
}
static int part_unlock(struct mtd_info *mtd, loff_t ofs, uint64_t len)
{
struct mtd_part *part = PART(mtd);
- if ((len + ofs) > mtd->size)
- return -EINVAL;
return mtd_unlock(part->master, ofs + part->offset, len);
}
static int part_is_locked(struct mtd_info *mtd, loff_t ofs, uint64_t len)
{
struct mtd_part *part = PART(mtd);
- if ((len + ofs) > mtd->size)
- return -EINVAL;
return mtd_is_locked(part->master, ofs + part->offset, len);
}
@@ -319,8 +295,6 @@
static int part_block_isbad(struct mtd_info *mtd, loff_t ofs)
{
struct mtd_part *part = PART(mtd);
- if (ofs >= mtd->size)
- return -EINVAL;
ofs += part->offset;
return mtd_block_isbad(part->master, ofs);
}
@@ -332,8 +306,6 @@
if (!(mtd->flags & MTD_WRITEABLE))
return -EROFS;
- if (ofs >= mtd->size)
- return -EINVAL;
ofs += part->offset;
res = mtd_block_markbad(part->master, ofs);
if (!res)
diff --git a/drivers/mtd/nand/nand_base.c b/drivers/mtd/nand/nand_base.c
index 13a56d3..dd182c8 100644
--- a/drivers/mtd/nand/nand_base.c
+++ b/drivers/mtd/nand/nand_base.c
@@ -123,12 +123,6 @@
ret = -EINVAL;
}
- /* Do not allow past end of device */
- if (ofs + len > mtd->size) {
- pr_debug("%s: past end of device\n", __func__);
- ret = -EINVAL;
- }
-
return ret;
}
@@ -1620,25 +1614,17 @@
struct mtd_oob_ops ops;
int ret;
- /* Do not allow reads past end of device */
- if ((from + len) > mtd->size)
- return -EINVAL;
if (!len)
return 0;
nand_get_device(chip, mtd, FL_READING);
-
ops.len = len;
ops.datbuf = buf;
ops.oobbuf = NULL;
ops.mode = 0;
-
ret = nand_do_read_ops(mtd, from, &ops);
-
*retlen = ops.retlen;
-
nand_release_device(mtd);
-
return ret;
}
@@ -2328,8 +2314,6 @@
int ret;
/* Do not allow reads past end of device */
- if ((to + len) > mtd->size)
- return -EINVAL;
if (!len)
return 0;
@@ -2367,25 +2351,17 @@
struct mtd_oob_ops ops;
int ret;
- /* Do not allow reads past end of device */
- if ((to + len) > mtd->size)
- return -EINVAL;
if (!len)
return 0;
nand_get_device(chip, mtd, FL_WRITING);
-
ops.len = len;
ops.datbuf = (uint8_t *)buf;
ops.oobbuf = NULL;
ops.mode = 0;
-
ret = nand_do_write_ops(mtd, to, &ops);
-
*retlen = ops.retlen;
-
nand_release_device(mtd);
-
return ret;
}
@@ -2749,10 +2725,6 @@
*/
static int nand_block_isbad(struct mtd_info *mtd, loff_t offs)
{
- /* Check for invalid offset */
- if (offs > mtd->size)
- return -EINVAL;
-
return nand_block_checkbad(mtd, offs, 1, 0);
}
diff --git a/drivers/mtd/onenand/onenand_base.c b/drivers/mtd/onenand/onenand_base.c
index 914c49b..9c6445d 100644
--- a/drivers/mtd/onenand/onenand_base.c
+++ b/drivers/mtd/onenand/onenand_base.c
@@ -1756,13 +1756,6 @@
/* Initialize retlen, in case of early exit */
*retlen = 0;
- /* Do not allow writes past end of device */
- if (unlikely((to + len) > mtd->size)) {
- printk(KERN_ERR "%s: Attempt write to past end of device\n",
- __func__);
- return -EINVAL;
- }
-
/* Reject writes, which are not page aligned */
if (unlikely(NOTALIGNED(to) || NOTALIGNED(len))) {
printk(KERN_ERR "%s: Attempt to write not page aligned data\n",
@@ -1890,13 +1883,6 @@
ops->retlen = 0;
ops->oobretlen = 0;
- /* Do not allow writes past end of device */
- if (unlikely((to + len) > mtd->size)) {
- printk(KERN_ERR "%s: Attempt write to past end of device\n",
- __func__);
- return -EINVAL;
- }
-
/* Reject writes, which are not page aligned */
if (unlikely(NOTALIGNED(to) || NOTALIGNED(len))) {
printk(KERN_ERR "%s: Attempt to write not page aligned data\n",
@@ -2493,12 +2479,6 @@
(unsigned long long)instr->addr,
(unsigned long long)instr->len);
- /* Do not allow erase past end of device */
- if (unlikely((len + addr) > mtd->size)) {
- printk(KERN_ERR "%s: Erase past end of device\n", __func__);
- return -EINVAL;
- }
-
if (FLEXONENAND(this)) {
/* Find the eraseregion of this address */
int i = flexonenand_region(mtd, addr);
diff --git a/drivers/mtd/ubi/gluebi.c b/drivers/mtd/ubi/gluebi.c
index 0101dce..b875c2c 100644
--- a/drivers/mtd/ubi/gluebi.c
+++ b/drivers/mtd/ubi/gluebi.c
@@ -174,11 +174,7 @@
int err = 0, lnum, offs, total_read;
struct gluebi_device *gluebi;
- if (len < 0 || from < 0 || from + len > mtd->size)
- return -EINVAL;
-
gluebi = container_of(mtd, struct gluebi_device, mtd);
-
lnum = div_u64_rem(from, mtd->erasesize, &offs);
total_read = len;
while (total_read) {
@@ -218,9 +214,6 @@
int err = 0, lnum, offs, total_written;
struct gluebi_device *gluebi;
- if (len < 0 || to < 0 || len + to > mtd->size)
- return -EINVAL;
-
gluebi = container_of(mtd, struct gluebi_device, mtd);
if (!(mtd->flags & MTD_WRITEABLE))
@@ -265,10 +258,6 @@
int err, i, lnum, count;
struct gluebi_device *gluebi;
- if (instr->addr < 0 || instr->addr > mtd->size - mtd->erasesize)
- return -EINVAL;
- if (instr->len < 0 || instr->addr + instr->len > mtd->size)
- return -EINVAL;
if (mtd_mod_by_ws(instr->addr, mtd) || mtd_mod_by_ws(instr->len, mtd))
return -EINVAL;
