staging: lustre: lmv: cleanup req in lmv_getattr_name()

In lmv_getattr_name() don't return a freed request in the error path.
Signed-off-by: John L. Hammond <john.hammond@intel.com>
Intel-bug-id: https://jira.hpdd.intel.com/browse/LU-4826
Reviewed-on: http://review.whamcloud.com/9863Reviewed-by: Nathaniel Clark <nathaniel.l.clark@intel.com>
Reviewed-by: Bob Glossman <bob.glossman@intel.com>
Reviewed-by: Oleg Drokin <oleg.drokin@intel.com>
Signed-off-by: James Simmons <jsimmons@infradead.org>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>

drivers/staging/lustre/lustre/lmv/lmv_obd.c

@@ -1920,6 +1920,7 @@ lmv_getattr_name(struct obd_export *exp, struct md_op_data *op_data,
 		tgt = lmv_find_target(lmv, &rid);
 		if (IS_ERR(tgt)) {
 			ptlrpc_req_finished(*request);
+			*request = NULL;
 			return PTR_ERR(tgt);
 		}