Alex Elder
23ed6e13b3
rbd: ignore result of ceph_copy_from_page_vector() ...
The result of ceph_copy_from_page_vector() is simply the length
argument it is provided.
This is called by rbd_obj_method_sync(), which returns the result if
it's non-negative. But we always either ignore or overwrite that
return value. So explicitly ignore what's returned by the copy
function, and have rbd_obj_method_sync() always return either a
negative errno or 0.
We also return the result of ceph_copy_from_page_vector() in
rbd_obj_read_sync(). There we still want to return the number of
bytes transferred, but we can use the value we already have in hand
rather than what ceph_copy_from_page_vector() provides.
Signed-off-by: Alex Elder <elder@inktank.com>
Reviewed-by: Josh Durgin <josh.durgin@inktank.com>
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