blkg_destroy(blkg);
spin_unlock(&blkcg->lock);
}
+
+ /*
+ * root blkg is destroyed. Just clear the pointer since
+ * root_rl does not take reference on root blkg.
+ */
+ q->root_blkg = NULL;
+ q->root_rl.blkg = NULL;
}
static void blkg_rcu_free(struct rcu_head *rcu_head)
*/
if (rl == &q->root_rl) {
ent = &q->blkg_list;
+ /* There are no more block groups, hence no request lists */
+ if (list_empty(ent))
+ return NULL;
} else {
blkg = container_of(rl, struct blkcg_gq, rl);
ent = &blkg->q_node;