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mtd: do not use mtd->read_oob directly 

Instead of checking whether 'mtd->read_oob' is defined, just call
'mtd_read_oob()' and handle the '-EOPNOTSUPP' error which will be returned
if the function is undefined.

Additionally, make 'mtd_write_oob()' return '-EOPNOTSUPP' if the function
is undefined.

Signed-off-by: Artem Bityutskiy <artem.bityutskiy@linux.intel.com>
Signed-off-by: David Woodhouse <David.Woodhouse@intel.com>
This commit is contained in:
Artem Bityutskiy 2011-12-28 17:50:34 +02:00 committed by David Woodhouse
parent 016c1291ce
commit dac2639f98
2 changed files with 6 additions and 7 deletions
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9
drivers/mtd/mtdchar.c
View File

@ -452,13 +452,8 @@ static int mtdchar_readoob(struct file *file, struct mtd_info *mtd,
if (length > 4096)
return -EINVAL;
if (!mtd->read_oob)
ret = -EOPNOTSUPP;
else
ret = access_ok(VERIFY_WRITE, ptr,
length) ? 0 : -EFAULT;
if (ret)
return ret;
if (!access_ok(VERIFY_WRITE, ptr, length))
return -EFAULT;
ops.ooblen = length;
ops.ooboffs = start & (mtd->writesize - 1);

4
include/linux/mtd/mtd.h
View File

@ -320,6 +320,8 @@ static inline int mtd_read_oob(struct mtd_info *mtd, loff_t from,
struct mtd_oob_ops *ops)
{
ops->retlen = ops->oobretlen = 0;
if (!mtd->read_oob)
return -EOPNOTSUPP;
return mtd->read_oob(mtd, from, ops);
}
@ -327,6 +329,8 @@ static inline int mtd_write_oob(struct mtd_info *mtd, loff_t to,
struct mtd_oob_ops *ops)
{
ops->retlen = ops->oobretlen = 0;
if (!mtd->write_oob)
return -EOPNOTSUPP;
return mtd->write_oob(mtd, to, ops);
}