[PATCH 28/28] mtd: introduce mtd_put_device interface

[Artem Bityutskiy <dedekind1@gmail.com>]

From: Artem Bityutskiy <artem.bityutskiy@linux.intel.com>

Signed-off-by: Artem Bityutskiy <artem.bityutskiy@linux.intel.com>
---
 drivers/mtd/mtdcore.c   |    2 +-
 fs/logfs/super.c        |    6 +++---
 include/linux/mtd/mtd.h |   18 ++++++++++++------
 3 files changed, 16 insertions(+), 10 deletions(-)

diff --git a/drivers/mtd/mtdcore.c b/drivers/mtd/mtdcore.c
index fbecbe8..8395b61 100644
--- a/drivers/mtd/mtdcore.c
+++ b/drivers/mtd/mtdcore.c
@@ -677,7 +677,7 @@ void __put_mtd_device(struct mtd_info *mtd)
 	BUG_ON(mtd->usecount < 0);
 
 	if (mtd->put_device)
-		mtd->put_device(mtd);
+		mtd_put_device(mtd);
 
 	module_put(mtd->owner);
 }
diff --git a/fs/logfs/super.c b/fs/logfs/super.c
index e795c234..2234d29 100644
--- a/fs/logfs/super.c
+++ b/fs/logfs/super.c
@@ -503,7 +503,7 @@ static void logfs_kill_sb(struct super_block *sb)
 	logfs_cleanup_rw(sb);
 	if (super->s_erase_page)
 		__free_page(super->s_erase_page);
-	super->s_devops->put_device(super);
+	mtd_put_device(super);
 	logfs_mempool_destroy(super->s_btree_pool);
 	logfs_mempool_destroy(super->s_alias_pool);
 	kfree(super);
@@ -522,14 +522,14 @@ static struct dentry *logfs_get_sb_device(struct logfs_super *super,
 	err = -EINVAL;
 	sb = sget(type, logfs_sb_test, logfs_sb_set, super);
 	if (IS_ERR(sb)) {
-		super->s_devops->put_device(super);
+		mtd_put_device(super);
 		kfree(super);
 		return ERR_CAST(sb);
 	}
 
 	if (sb->s_root) {
 		/* Device is already in use */
-		super->s_devops->put_device(super);
+		mtd_put_device(super);
 		kfree(super);
 		return dget(sb->s_root);
 	}
diff --git a/include/linux/mtd/mtd.h b/include/linux/mtd/mtd.h
index 0e696b7..e8c4409 100644
--- a/include/linux/mtd/mtd.h
+++ b/include/linux/mtd/mtd.h
@@ -215,6 +215,7 @@ struct mtd_info {
 	int (*suspend) (struct mtd_info *mtd);
 	void (*resume) (struct mtd_info *mtd);
 	int (*get_device) (struct mtd_info *mtd);
+	void (*put_device) (struct mtd_info *mtd);
 
 	/* Backing device capabilities for this device
 	 * - provides mmap capabilities
@@ -233,12 +234,6 @@ struct mtd_info {
 	struct module *owner;
 	struct device dev;
 	int usecount;
-
-	/* If the driver is something smart, like UBI, it may need to maintain
-	 * its own reference counting. The below functions are only for driver.
-	 * The driver may register its callbacks. These callbacks are not
-	 * supposed to be called by MTD users */
-	void (*put_device) (struct mtd_info *mtd);
 };
 
 /*
@@ -414,11 +409,22 @@ static inline int mtd_block_markbad(struct mtd_info *mtd, loff_t ofs)
 	return mtd->block_markbad(mtd, ofs);
 }
 
+/*
+ * If the driver is something smart, like UBI, it may need to maintain its own
+ * reference counting. The below functions are only for driver. The driver may
+ * register its callbacks. These callbacks are not supposed to be called by MTD
+ * users.
+ */
 static inline int mtd_get_device(struct mtd_info *mtd)
 {
 	return mtd->get_device(mtd);
 }
 
+static inline void mtd_put_device(struct mtd_info *mtd)
+{
+	return mtd->put_device(mtd);
+}
+
 static inline struct mtd_info *dev_to_mtd(struct device *dev)
 {
 	return dev ? dev_get_drvdata(dev) : NULL;
-- 
1.7.7.3