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author | Artem Bityutskiy <artem.bityutskiy@linux.intel.com> | 2012-02-03 14:23:52 (GMT) |
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committer | David Woodhouse <David.Woodhouse@intel.com> | 2012-03-26 23:28:18 (GMT) |
commit | 5def48982b778aaebe201f85af7170b7d0a6619f (patch) | |
tree | 2920f1b524698877fab8521ee04349a5e285e47d /drivers/mtd/devices/phram.c | |
parent | 8273a0c911d8e068297ef70aa7241ee78db4c712 (diff) | |
download | linux-fsl-qoriq-5def48982b778aaebe201f85af7170b7d0a6619f.tar.xz |
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>
Diffstat (limited to 'drivers/mtd/devices/phram.c')
-rw-r--r-- | drivers/mtd/devices/phram.c | 23 |
1 files changed, 0 insertions, 23 deletions
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 @@ static int phram_erase(struct mtd_info *mtd, struct erase_info *instr) { 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 @@ static int phram_read(struct mtd_info *mtd, loff_t from, size_t len, { 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 @@ static int phram_write(struct mtd_info *mtd, loff_t to, size_t len, { 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; } |