tree 0958090c3fe9bd7d265cb46b02f04a9e4b2169bf
parent 0ce267ff95a0302cf6fb2a552833abbfb7861a43
author Miklos Szeredi <mszeredi@redhat.com> 1471504244 +0200
committer Miklos Szeredi <mszeredi@redhat.com> 1479209661 +0100

fuse: fix fuse_write_end() if zero bytes were copied

If pos is at the beginning of a page and copied is zero then page is not
zeroed but is marked uptodate.

Fix by skipping everything except unlock/put of page if zero bytes were
copied.

Reported-by: Al Viro <viro@zeniv.linux.org.uk>
Fixes: 6b12c1b37e55 ("fuse: Implement write_begin/write_end callbacks")
Cc: <stable@vger.kernel.org> # v3.15+
Signed-off-by: Miklos Szeredi <mszeredi@redhat.com>