mtd: introduce mtd_unlock interface

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

drivers/mtd/mtdchar.c

@@ -838,7 +838,7 @@ static int mtdchar_ioctl(struct file *file, u_int cmd, u_long arg)
 		if (!mtd->unlock)
 			ret = -EOPNOTSUPP;
 		else
-			ret = mtd->unlock(mtd, einfo.start, einfo.length);
+			ret = mtd_unlock(mtd, einfo.start, einfo.length);
 		break;
 	}
 

drivers/mtd/mtdconcat.c

@@ -596,7 +596,7 @@ static int concat_unlock(struct mtd_info *mtd, loff_t ofs, uint64_t len)
 			size = len;
 
 		if (subdev->unlock) {
-			err = subdev->unlock(subdev, ofs, size);
+			err = mtd_unlock(subdev, ofs, size);
 			if (err)
 				break;
 		} else

drivers/mtd/mtdcore.c

@@ -340,7 +340,7 @@ int add_mtd_device(struct mtd_info *mtd)
 	/* Some chips always power up locked. Unlock them now */
 	if ((mtd->flags & MTD_WRITEABLE)
 	    && (mtd->flags & MTD_POWERUP_LOCK) && mtd->unlock) {
-		if (mtd->unlock(mtd, 0, mtd->size))
+		if (mtd_unlock(mtd, 0, mtd->size))
 			printk(KERN_WARNING
 			       "%s: unlock failed, writes may not work\n",
 			       mtd->name);

drivers/mtd/mtdpart.c

@@ -287,7 +287,7 @@ static int part_unlock(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->unlock(part->master, ofs + part->offset, len);
+	return mtd_unlock(part->master, ofs + part->offset, len);
 }
 
 static int part_is_locked(struct mtd_info *mtd, loff_t ofs, uint64_t len)

include/linux/mtd/mtd.h

@@ -208,13 +208,13 @@ struct mtd_info {
 			unsigned long count, loff_t to, size_t *retlen);
 	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);
 
 	/* Backing device capabilities for this device
 	 * - provides mmap capabilities
 	 */
 	struct backing_dev_info *backing_dev_info;
 
-	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);
 
 	/* Power Management functions */
@@ -389,6 +389,11 @@ static inline int mtd_lock(struct mtd_info *mtd, loff_t ofs, uint64_t len)
 	return mtd->lock(mtd, ofs, len);
 }
 
+static inline int mtd_unlock(struct mtd_info *mtd, loff_t ofs, uint64_t len)
+{
+	return mtd->unlock(mtd, ofs, len);
+}
+
 static inline struct mtd_info *dev_to_mtd(struct device *dev)
 {
 	return dev ? dev_get_drvdata(dev) : NULL;