mtd: introduce mtd_is_locked interface

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

drivers/mtd/mtdchar.c

@@ -852,7 +852,7 @@ static int mtdchar_ioctl(struct file *file, u_int cmd, u_long arg)
 		if (!mtd->is_locked)
 			ret = -EOPNOTSUPP;
 		else
-			ret = mtd->is_locked(mtd, einfo.start, einfo.length);
+			ret = mtd_is_locked(mtd, einfo.start, einfo.length);
 		break;
 	}
 

drivers/mtd/mtdpart.c

@@ -295,7 +295,7 @@ static int part_is_locked(struct mtd_info *mtd, loff_t ofs, uint64_t len)
 	struct mtd_part *part = PART(mtd);
 	if ((len + ofs) > mtd->size)
 		return -EINVAL;
-	return part->master->is_locked(part->master, ofs + part->offset, len);
+	return mtd_is_locked(part->master, ofs + part->offset, len);
 }
 
 static void part_sync(struct mtd_info *mtd)

include/linux/mtd/mtd.h

@@ -209,14 +209,13 @@ struct mtd_info {
 	void (*sync) (struct mtd_info *mtd);
 	int (*lock) (struct mtd_info *mtd, loff_t ofs, uint64_t len);
 	int (*unlock) (struct mtd_info *mtd, loff_t ofs, uint64_t len);
+	int (*is_locked) (struct mtd_info *mtd, loff_t ofs, uint64_t len);
 
 	/* Backing device capabilities for this device
 	 * - provides mmap capabilities
 	 */
 	struct backing_dev_info *backing_dev_info;
 
-	int (*is_locked) (struct mtd_info *mtd, loff_t ofs, uint64_t len);
-
 	/* Power Management functions */
 	int (*suspend) (struct mtd_info *mtd);
 	void (*resume) (struct mtd_info *mtd);
@@ -394,6 +393,11 @@ static inline int mtd_unlock(struct mtd_info *mtd, loff_t ofs, uint64_t len)
 	return mtd->unlock(mtd, ofs, len);
 }
 
+static inline int mtd_is_locked(struct mtd_info *mtd, loff_t ofs, uint64_t len)
+{
+	return mtd->is_locked(mtd, ofs, len);
+}
+
 static inline struct mtd_info *dev_to_mtd(struct device *dev)
 {
 	return dev ? dev_get_drvdata(dev) : NULL;