[S390] cio: cm_enable memory leak.

We allocage two pages when channel path measurements are enabled
via cm_enable. We must not forget to free them again when
channel path measurements are disabled again.
Signed-off-by: NCornelia Huck <cornelia.huck@de.ibm.com>
Signed-off-by: NMartin Schwidefsky <schwidefsky@de.ibm.com>

drivers/s390/cio/chsc.c

@@ -818,7 +818,7 @@ chsc_secm(struct channel_subsystem *css, int enable)
 		} else
 			chsc_remove_cmg_attr(css);
 	}
-	if (enable && !css->cm_enabled) {
+	if (!css->cm_enabled) {
 		free_page((unsigned long)css->cub_addr1);
 		free_page((unsigned long)css->cub_addr2);
 	}