UBI: introduce volume refcounting
Add ref_count field to UBI volumes and remove weired "vol->removed"
field. This way things are better understandable and we do not have
to do whold show_attr operation under spinlock.
Signed-off-by: Artem Bityutskiy <Artem.Bityutskiy@nokia.com>
diff --git a/drivers/mtd/ubi/kapi.c b/drivers/mtd/ubi/kapi.c
index 9c28376..780c273 100644
--- a/drivers/mtd/ubi/kapi.c
+++ b/drivers/mtd/ubi/kapi.c
@@ -152,6 +152,7 @@
break;
}
get_device(&vol->dev);
+ vol->ref_count += 1;
spin_unlock(&ubi->volumes_lock);
desc->vol = vol;
@@ -261,10 +262,11 @@
case UBI_EXCLUSIVE:
vol->exclusive = 0;
}
+ vol->ref_count -= 1;
spin_unlock(&vol->ubi->volumes_lock);
- kfree(desc);
put_device(&vol->dev);
+ kfree(desc);
module_put(THIS_MODULE);
}
EXPORT_SYMBOL_GPL(ubi_close_volume);