UBI: remove redundant field

Remove redundant ubi->major field - we have it in ubi->cdev.dev
already.

Signed-off-by: Artem Bityutskiy <Artem.Bityutskiy@nokia.com>

drivers/mtd/ubi/build.c

@@ -150,7 +150,7 @@ static int ubi_sysfs_init(struct ubi_device *ubi)
 	int err;
 
 	ubi->dev.release = dev_release;
-	ubi->dev.devt = MKDEV(ubi->major, 0);
+	ubi->dev.devt = ubi->cdev.dev;
 	ubi->dev.class = ubi_class;
 	sprintf(&ubi->dev.bus_id[0], UBI_NAME_STR"%d", ubi->ubi_num);
 	err = device_register(&ubi->dev);
@@ -278,12 +278,11 @@ static int uif_init(struct ubi_device *ubi)
 		return err;
 	}
 
+	ubi_assert(MINOR(dev) == 0);
 	cdev_init(&ubi->cdev, &ubi_cdev_operations);
-	ubi->major = MAJOR(dev);
-	dbg_msg("%s major is %u", ubi->ubi_name, ubi->major);
+	dbg_msg("%s major is %u", ubi->ubi_name, MAJOR(dev));
 	ubi->cdev.owner = THIS_MODULE;
 
-	dev = MKDEV(ubi->major, 0);
 	err = cdev_add(&ubi->cdev, dev, 1);
 	if (err) {
 		ubi_err("cannot add character device %s", ubi->ubi_name);
@@ -309,8 +308,7 @@ out_volumes:
 out_cdev:
 	cdev_del(&ubi->cdev);
 out_unreg:
-	unregister_chrdev_region(MKDEV(ubi->major, 0),
-				 ubi->vtbl_slots + 1);
+	unregister_chrdev_region(ubi->cdev.dev, ubi->vtbl_slots + 1);
 	return err;
 }
 
@@ -323,7 +321,7 @@ static void uif_close(struct ubi_device *ubi)
 	kill_volumes(ubi);
 	ubi_sysfs_close(ubi);
 	cdev_del(&ubi->cdev);
-	unregister_chrdev_region(MKDEV(ubi->major, 0), ubi->vtbl_slots + 1);
+	unregister_chrdev_region(ubi->cdev.dev, ubi->vtbl_slots + 1);
 }
 
 /**

drivers/mtd/ubi/cdev.c

@@ -61,7 +61,7 @@ static struct ubi_device *major_to_device(int major)
 	int i;
 
 	for (i = 0; i < ubi_devices_cnt; i++)
-		if (ubi_devices[i] && ubi_devices[i]->major == major)
+		if (ubi_devices[i] && MAJOR(ubi_devices[i]->cdev.dev) == major)
 			return ubi_devices[i];
 	BUG();
 	return NULL;

drivers/mtd/ubi/kapi.c

@@ -46,7 +46,7 @@ int ubi_get_device_info(int ubi_num, struct ubi_device_info *di)
 	di->leb_size = ubi->leb_size;
 	di->min_io_size = ubi->min_io_size;
 	di->ro_mode = ubi->ro_mode;
-	di->cdev = MKDEV(ubi->major, 0);
+	di->cdev = ubi->cdev.dev;
 	return 0;
 }
 EXPORT_SYMBOL_GPL(ubi_get_device_info);
@@ -73,7 +73,7 @@ void ubi_get_volume_info(struct ubi_volume_desc *desc,
 	vi->usable_leb_size = vol->usable_leb_size;
 	vi->name_len = vol->name_len;
 	vi->name = vol->name;
-	vi->cdev = MKDEV(ubi->major, vi->vol_id + 1);
+	vi->cdev = vol->cdev.dev;
 }
 EXPORT_SYMBOL_GPL(ubi_get_volume_info);
 

drivers/mtd/ubi/ubi.h

@@ -204,7 +204,6 @@ struct ubi_wl_entry;
  * @cdev: character device object to create character device
  * @ubi_num: UBI device number
  * @ubi_name: UBI device name
- * @major: character device major number
  * @vol_count: number of volumes in this UBI device
  * @volumes: volumes of this UBI device
  * @volumes_lock: protects @volumes, @rsvd_pebs, @avail_pebs, beb_rsvd_pebs,
@@ -287,7 +286,6 @@ struct ubi_device {
 	struct device dev;
 	int ubi_num;
 	char ubi_name[sizeof(UBI_NAME_STR)+5];
-	int major;
 	int vol_count;
 	struct ubi_volume *volumes[UBI_MAX_VOLUMES+UBI_INT_VOL_COUNT];
 	spinlock_t volumes_lock;

drivers/mtd/ubi/vmt.c

@@ -192,6 +192,7 @@ int ubi_create_volume(struct ubi_device *ubi, struct ubi_mkvol_req *req)
 	struct ubi_volume *vol;
 	struct ubi_vtbl_record vtbl_rec;
 	uint64_t bytes;
+	dev_t dev;
 
 	if (ubi->ro_mode)
 		return -EROFS;
@@ -301,7 +302,8 @@ int ubi_create_volume(struct ubi_device *ubi, struct ubi_mkvol_req *req)
 	/* Register character device for the volume */
 	cdev_init(&vol->cdev, &ubi_vol_cdev_operations);
 	vol->cdev.owner = THIS_MODULE;
-	err = cdev_add(&vol->cdev, MKDEV(ubi->major, vol_id + 1), 1);
+	dev = MKDEV(MAJOR(ubi->cdev.dev), vol_id + 1);
+	err = cdev_add(&vol->cdev, dev, 1);
 	if (err) {
 		ubi_err("cannot add character device for volume %d", vol_id);
 		goto out_mapping;
@@ -313,7 +315,7 @@ int ubi_create_volume(struct ubi_device *ubi, struct ubi_mkvol_req *req)
 
 	vol->dev.release = vol_release;
 	vol->dev.parent = &ubi->dev;
-	vol->dev.devt = MKDEV(ubi->major, vol->vol_id + 1);
+	vol->dev.devt = dev;
 	vol->dev.class = ubi_class;
 	sprintf(&vol->dev.bus_id[0], "%s_%d", ubi->ubi_name, vol->vol_id);
 	err = device_register(&vol->dev);
@@ -576,6 +578,7 @@ out_free:
 int ubi_add_volume(struct ubi_device *ubi, int vol_id)
 {
 	int err;
+	dev_t dev;
 	struct ubi_volume *vol = ubi->volumes[vol_id];
 
 	dbg_msg("add volume %d", vol_id);
@@ -585,7 +588,8 @@ int ubi_add_volume(struct ubi_device *ubi, int vol_id)
 	/* Register character device for the volume */
 	cdev_init(&vol->cdev, &ubi_vol_cdev_operations);
 	vol->cdev.owner = THIS_MODULE;
-	err = cdev_add(&vol->cdev, MKDEV(ubi->major, vol->vol_id + 1), 1);
+	dev = MKDEV(MAJOR(ubi->cdev.dev), vol->vol_id + 1);
+	err = cdev_add(&vol->cdev, dev, 1);
 	if (err) {
 		ubi_err("cannot add character device for volume %d", vol_id);
 		return err;
@@ -597,7 +601,7 @@ int ubi_add_volume(struct ubi_device *ubi, int vol_id)
 
 	vol->dev.release = vol_release;
 	vol->dev.parent = &ubi->dev;
-	vol->dev.devt = MKDEV(ubi->major, vol->vol_id + 1);
+	vol->dev.devt = dev;
 	vol->dev.class = ubi_class;
 	sprintf(&vol->dev.bus_id[0], "%s_%d", ubi->ubi_name, vol->vol_id);
 	err = device_register(&vol->dev);