blkdebug: Simplify passing of Error through qemu_opts_foreach()

Cc: Kevin Wolf <kwolf@redhat.com>
Cc: qemu-block@nongnu.org
Signed-off-by: Markus Armbruster <armbru@redhat.com>
Reviewed-by: Eric Blake <eblake@redhat.com>
Acked-by: Kevin Wolf <kwolf@redhat.com>

block/blkdebug.c

diff --git a/block/blkdebug.c b/block/blkdebug.c
index be0d273..1e92607 100644
--- a/block/blkdebug.c
+++ b/block/blkdebug.c
@@ -216,7 +216,6 @@
 struct add_rule_data {
     BDRVBlkdebugState *s;
     int action;
-    Error **errp;
 };
 
 static int add_rule(void *opaque, QemuOpts *opts, Error **errp)
@@ -230,10 +229,10 @@
     /* Find the right event for the rule */
     event_name = qemu_opt_get(opts, "event");
     if (!event_name) {
-        error_setg(d->errp, "Missing event name for rule");
+        error_setg(errp, "Missing event name for rule");
         return -1;
     } else if (get_event_by_name(event_name, &event) < 0) {
-        error_setg(d->errp, "Invalid event name \"%s\"", event_name);
+        error_setg(errp, "Invalid event name \"%s\"", event_name);
         return -1;
     }
 
@@ -319,8 +318,7 @@
 
     d.s = s;
     d.action = ACTION_INJECT_ERROR;
-    d.errp = &local_err;
-    qemu_opts_foreach(&inject_error_opts, add_rule, &d, NULL);
+    qemu_opts_foreach(&inject_error_opts, add_rule, &d, &local_err);
     if (local_err) {
         error_propagate(errp, local_err);
         ret = -EINVAL;
@@ -328,7 +326,7 @@
     }
 
     d.action = ACTION_SET_STATE;
-    qemu_opts_foreach(&set_state_opts, add_rule, &d, NULL);
+    qemu_opts_foreach(&set_state_opts, add_rule, &d, &local_err);
     if (local_err) {
         error_propagate(errp, local_err);
         ret = -EINVAL;