mtd: do not use mtd->lock_user_prot_reg directly

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>

2 files changed, 2 insertions, 2 deletions

diff --git a/drivers/mtd/mtdchar.c b/drivers/mtd/mtdchar.c
index 25bbbc3aa665..2020a169ed9c 100644
--- a/drivers/mtd/mtdchar.c
+++ b/drivers/mtd/mtdchar.c
@@ -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;
         }
diff --git a/include/linux/mtd/mtd.h b/include/linux/mtd/mtd.h
index 7cd56d2b9419..a994129ede55 100644
--- a/include/linux/mtd/mtd.h
+++ b/include/linux/mtd/mtd.h
@@ -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);
 }