1 files changed, 4 insertions, 2 deletions

diff --git a/include/linux/mtd/mtd.h b/include/linux/mtd/mtd.h
index e2e545616b2a..8c243117c087 100644
--- a/include/linux/mtd/mtd.h
+++ b/include/linux/mtd/mtd.h
@@ -177,7 +177,7 @@ struct mtd_info {
         int (*_erase) (struct mtd_info *mtd, struct erase_info *instr);
         int (*_point) (struct mtd_info *mtd, loff_t from, size_t len,
                        size_t *retlen, void **virt, resource_size_t *phys);
-        void (*_unpoint) (struct mtd_info *mtd, loff_t from, size_t len);
+        int (*_unpoint) (struct mtd_info *mtd, loff_t from, size_t len);
         unsigned long (*_get_unmapped_area) (struct mtd_info *mtd,
                                              unsigned long len,
                                              unsigned long offset,
@@ -265,8 +265,10 @@ static inline int mtd_point(struct mtd_info *mtd, loff_t from, size_t len,
 }
 
 /* We probably shouldn't allow XIP if the unpoint isn't a NULL */
-static inline void mtd_unpoint(struct mtd_info *mtd, loff_t from, size_t len)
+static inline int mtd_unpoint(struct mtd_info *mtd, loff_t from, size_t len)
 {
+        if (!mtd->_point)
+                return -EOPNOTSUPP;
         return mtd->_unpoint(mtd, from, len);
 }