Commit 8ddcd653257c "block: introduce GENHD_FL_HIDDEN" added handling of
hidden devices to get_gendisk() but forgot to drop module reference
which is also acquired by get_disk(). Drop the reference as necessary.
Arguably the function naming here is misleading as put_disk() is *not*
the counterpart of get_disk() but let's fix that in the follow up
commit since that will be more intrusive.
Fixes: 8ddcd653257c18a669fcb75ee42c37054908e0d6
CC: Christoph Hellwig <hch@xxxxxx>
Signed-off-by: Jan Kara <jack@xxxxxxx>
---
block/genhd.c | 3 +++
1 file changed, 3 insertions(+)
diff --git a/block/genhd.c b/block/genhd.c
index 96a66f671720..22f4fc340a3a 100644
--- a/block/genhd.c
+++ b/block/genhd.c
@@ -802,7 +802,10 @@ struct gendisk *get_gendisk(dev_t devt, int *partno)
}
if (disk && unlikely(disk->flags & GENHD_FL_HIDDEN)) {
+ struct module *owner = disk->fops->owner;
+
put_disk(disk);
+ module_put(owner);
disk = NULL;
}
return disk;
--
2.13.6
