1 files changed, 4 insertions, 0 deletions

diff --git a/include/linux/mtd/mtd.h b/include/linux/mtd/mtd.h
index 721a63ffeb96..7122efdc6d99 100644
--- a/include/linux/mtd/mtd.h
+++ b/include/linux/mtd/mtd.h
@@ -342,6 +342,8 @@ static inline int mtd_write_oob(struct mtd_info *mtd, loff_t to,
 static inline int mtd_get_fact_prot_info(struct mtd_info *mtd,
                                          struct otp_info *buf, size_t len)
 {
+        if (!mtd->get_fact_prot_info)
+                return -EOPNOTSUPP;
         return mtd->get_fact_prot_info(mtd, buf, len);
 }
 
@@ -357,6 +359,8 @@ static inline int mtd_get_user_prot_info(struct mtd_info *mtd,
                                          struct otp_info *buf,
                                          size_t len)
 {
+        if (!mtd->get_user_prot_info)
+                return -EOPNOTSUPP;
         return mtd->get_user_prot_info(mtd, buf, len);
 }