mtd: do not use mtd->lock, unlock and is_locked directly

Instead, call the corresponding MTD API function which will return
'-EOPNOTSUPP' if the operation is not supported.

Signed-off-by: Artem Bityutskiy <artem.bityutskiy@linux.intel.com>
Signed-off-by: David Woodhouse <David.Woodhouse@intel.com>

1 files changed, 6 insertions, 0 deletions

diff --git a/include/linux/mtd/mtd.h b/include/linux/mtd/mtd.h
index 305f12b940f..6c91ba59c22 100644
--- a/include/linux/mtd/mtd.h
+++ b/include/linux/mtd/mtd.h
@@ -406,16 +406,22 @@ static inline void mtd_sync(struct mtd_info *mtd)
 /* Chip-supported device locking */
 static inline int mtd_lock(struct mtd_info *mtd, loff_t ofs, uint64_t len)
 {
+        if (!mtd->lock)
+                return -EOPNOTSUPP;
         return mtd->lock(mtd, ofs, len);
 }
 
 static inline int mtd_unlock(struct mtd_info *mtd, loff_t ofs, uint64_t len)
 {
+        if (!mtd->unlock)
+                return -EOPNOTSUPP;
         return mtd->unlock(mtd, ofs, len);
 }
 
 static inline int mtd_is_locked(struct mtd_info *mtd, loff_t ofs, uint64_t len)
 {
+        if (!mtd->is_locked)
+                return -EOPNOTSUPP;
         return mtd->is_locked(mtd, ofs, len);
 }