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>
diff --git a/include/linux/mtd/mtd.h b/include/linux/mtd/mtd.h
index 7cd56d2..a994129 100644
--- a/include/linux/mtd/mtd.h
+++ b/include/linux/mtd/mtd.h
@@ -389,6 +389,8 @@
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);
}