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blkcg: check pol->cpd_free_fn before free cpd

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

Reviewed-by: Johannes Thumshirn <jthumshirn@suse.de>
Signed-off-by: weiping zhang <zhangweiping@didichuxing.com>
Signed-off-by: Jens Axboe <axboe@kernel.dk>
This commit is contained in:
weiping zhang 2017-10-10 22:53:46 +08:00 committed by Jens Axboe
parent 8264c3214f
commit 58a9edce0a
1 changed files with 2 additions and 2 deletions
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4
block/blk-cgroup.c
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@ -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]);