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mtd: do not use mtd->lock_user_prot_reg directly

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Instead, check the -EOPNOTSUPP return code of 'mtd_lock_user_prot_reg()'.

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 2011-12-29 10:45:04 +02:00 committed by David Woodhouse
parent 27c151a5e5
commit e2936b2af5
2 changed files with 2 additions and 2 deletions
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2
drivers/mtd/mtdchar.c
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@ -949,8 +949,6 @@ static int mtdchar_ioctl(struct file *file, u_int cmd, u_long arg)
return -EINVAL;
if (copy_from_user(&oinfo, argp, sizeof(oinfo)))
return -EFAULT;
if (!mtd->lock_user_prot_reg)
return -EOPNOTSUPP;
ret = mtd_lock_user_prot_reg(mtd, oinfo.start, oinfo.length);
break;
}

2
include/linux/mtd/mtd.h
View File

@ -389,6 +389,8 @@ static inline int mtd_write_user_prot_reg(struct mtd_info *mtd, loff_t to,
static inline int mtd_lock_user_prot_reg(struct mtd_info *mtd, loff_t from,
size_t len)
{
if (!mtd->lock_user_prot_reg)
return -EOPNOTSUPP;
return mtd->lock_user_prot_reg(mtd, from, len);
}