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block: make gendisk hold a reference to its queue
[pandora-kernel.git]
/
block
/
genhd.c
diff --git
a/block/genhd.c
b/block/genhd.c
index
e2f6790
..
d261b73
100644
(file)
--- a/
block/genhd.c
+++ b/
block/genhd.c
@@
-611,6
+611,12
@@
void add_disk(struct gendisk *disk)
register_disk(disk);
blk_register_queue(disk);
register_disk(disk);
blk_register_queue(disk);
+ /*
+ * Take an extra ref on queue which will be put on disk_release()
+ * so that it sticks around as long as @disk is there.
+ */
+ WARN_ON_ONCE(blk_get_queue(disk->queue));
+
retval = sysfs_create_link(&disk_to_dev(disk)->kobj, &bdi->dev->kobj,
"bdi");
WARN_ON(retval);
retval = sysfs_create_link(&disk_to_dev(disk)->kobj, &bdi->dev->kobj,
"bdi");
WARN_ON(retval);
@@
-1095,6
+1101,8
@@
static void disk_release(struct device *dev)
disk_replace_part_tbl(disk, NULL);
free_part_stats(&disk->part0);
free_part_info(&disk->part0);
disk_replace_part_tbl(disk, NULL);
free_part_stats(&disk->part0);
free_part_info(&disk->part0);
+ if (disk->queue)
+ blk_put_queue(disk->queue);
kfree(disk);
}
struct class block_class = {
kfree(disk);
}
struct class block_class = {