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, 1 insertions, 4 deletions

diff --git a/drivers/mtd/lpddr/lpddr_cmds.c b/drivers/mtd/lpddr/lpddr_cmds.c
index de960b1d395..0f3731c6b3f 100644
--- a/drivers/mtd/lpddr/lpddr_cmds.c
+++ b/drivers/mtd/lpddr/lpddr_cmds.c
@@ -530,7 +530,7 @@ static int lpddr_point(struct mtd_info *mtd, loff_t adr, size_t len,
         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 @@ static int lpddr_erase(struct mtd_info *mtd, struct erase_info *instr)
         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)