-EINVAL (in host order, no less) is not a good thing to return to client.
nfsd4_truncate() returns it in one case and its callers expect nfs_....  from
it.  AFAICS, it should be nfserr_inval
Signed-off-by: Al Viro <viro@zeniv.linux.org.uk>
Signed-off-by: Neil Brown <neilb@suse.de>
Signed-off-by: Andrew Morton <akpm@osdl.org>
Signed-off-by: Linus Torvalds <torvalds@osdl.org>
        if (!open->op_truncate)
                return 0;
        if (!(open->op_share_access & NFS4_SHARE_ACCESS_WRITE))
-               return -EINVAL;
+               return nfserr_inval;
        return nfsd_setattr(rqstp, fh, &iattr, 0, (time_t)0);
 }