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rbd: fix snapshot context reference count for discards 

Discards take a reference to the snapshot context of an image when
they are created.  This reference needs to be cleaned up when the
request is done just as it is for regular writes.

Signed-off-by: Josh Durgin <josh.durgin@inktank.com>
This commit is contained in:
Josh Durgin 2014-04-04 17:47:52 -07:00 committed by Ilya Dryomov
parent 3c5df89367
commit bef95455a4
1 changed files with 2 additions and 1 deletions
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3
drivers/block/rbd.c
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@ -2170,7 +2170,8 @@ static void rbd_img_request_destroy(struct kref *kref)
rbd_dev_parent_put(img_request->rbd_dev);
}
if (img_request_write_test(img_request))
if (img_request_write_test(img_request) ||
img_request_discard_test(img_request))
ceph_put_snap_context(img_request->snapc);
kmem_cache_free(rbd_img_request_cache, img_request);