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>

1 files changed, 0 insertions, 38 deletions

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 @@ static int pmc551_erase(struct mtd_info *mtd, struct erase_info *instr)
 #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 @@ static int pmc551_point(struct mtd_info *mtd, loff_t from, size_t len,
 	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 @@ static int pmc551_read(struct mtd_info *mtd, loff_t from, size_t len,
 #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 @@ static int pmc551_write(struct mtd_info *mtd, loff_t to, size_t len,
 #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);