Move the initialization bits into common place at the beginning of the
function.

Also removing some superfluous zero initialization for addr and
transaction, because we zero all the data at the top.
Signed-off-by: NJiri Olsa <jolsa@kernel.org>
Cc: Adrian Hunter <adrian.hunter@intel.com>
Cc: David Ahern <dsahern@gmail.com>
Cc: Namhyung Kim <namhyung@kernel.org>
Cc: Wang Nan <wangnan0@huawei.com>
Link: http://lkml.kernel.org/n/tip-1gv5t6fvv735t1rt3mxpy1h9@git.kernel.orgSigned-off-by: NArnaldo Carvalho de Melo <acme@redhat.com>