blkcg: check pol->cpd_free_fn before free cpd (58a9edce) · Commits · 戴 / test

check pol->cpd_free_fn() instead of pol->cpd_alloc_fn() when free cpd. Reviewed-by:

block/blk-cgroup.c

+2 −2

Original line number	Diff line number	Diff line
		@@ -1452,7 +1452,7 @@ int blkcg_policy_register(struct blkcg_policy *pol)
		return 0;

		err_free_cpds:
		if (pol->cpd_alloc_fn) {
		if (pol->cpd_free_fn) {
		list_for_each_entry(blkcg, &all_blkcgs, all_blkcgs_node) {
		if (blkcg->cpd[pol->plid]) {
		pol->cpd_free_fn(blkcg->cpd[pol->plid]);
		@@ -1492,7 +1492,7 @@ void blkcg_policy_unregister(struct blkcg_policy *pol)
		/* remove cpds and unregister */
		mutex_lock(&blkcg_pol_mutex);

		if (pol->cpd_alloc_fn) {
		if (pol->cpd_free_fn) {
		list_for_each_entry(blkcg, &all_blkcgs, all_blkcgs_node) {
		if (blkcg->cpd[pol->plid]) {
		pol->cpd_free_fn(blkcg->cpd[pol->plid]);