--- a/drivers/mtd/mtdchar.c
+++ b/drivers/mtd/mtdchar.c
@@ -595,7 +595,10 @@
 		/* Sanitize user input */
 		p.devname[BLKPG_DEVNAMELTH - 1] = '\0';
 
-		return mtd_add_partition(mtd, p.devname, p.start, p.length);
+		/* No mtd flags masking required */
+		uint32_t mask_flags = 0;
+
+		return mtd_add_partition(mtd, p.devname, p.start, p.length, mask_flags);
 
 	case BLKPG_DEL_PARTITION:
 
--- a/drivers/mtd/mtdpart.c
+++ b/drivers/mtd/mtdpart.c
@@ -726,7 +726,7 @@
 }
 
 int mtd_add_partition(struct mtd_info *parent, const char *name,
-		      long long offset, long long length)
+		      long long offset, long long length, uint32_t mask_flags)
 {
 	struct mtd_partition part;
 	struct mtd_part *new;
@@ -747,6 +747,7 @@
 	part.name = name;
 	part.size = length;
 	part.offset = offset;
+	part.mask_flags = mask_flags;
 
 	new = allocate_partition(parent, &part, -1, offset);
 	if (IS_ERR(new))
@@ -855,10 +856,14 @@
 		/* adjust partition offsets */
 		parts[i].offset += slave->offset;
 
+		/* adjust partition mask */
+		parts[i].mask_flags = !(slave->mtd.flags & MTD_WRITEABLE) ? MTD_WRITEABLE : 0;
+
 		mtd_add_partition(slave->parent,
 				  parts[i].name,
 				  parts[i].offset,
-				  parts[i].size);
+				  parts[i].size,
+				  parts[i].mask_flags);
 	}
 
 	kfree(parts);
--- a/include/linux/mtd/partitions.h
+++ b/include/linux/mtd/partitions.h
@@ -114,7 +114,7 @@
 
 int mtd_is_partition(const struct mtd_info *mtd);
 int mtd_add_partition(struct mtd_info *master, const char *name,
-		      long long offset, long long length);
+		      long long offset, long long length, uint32_t mask_flags);
 int mtd_del_partition(struct mtd_info *master, int partno);
 struct mtd_info *mtdpart_get_master(const struct mtd_info *mtd);
 uint64_t mtdpart_get_offset(const struct mtd_info *mtd);