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authorLinus Torvalds <torvalds@linux-foundation.org>2022-03-22 02:48:55 +0300
committerLinus Torvalds <torvalds@linux-foundation.org>2022-03-22 02:48:55 +0300
commit616355cc818c6ddadc393fdfd4491f94458cb715 (patch)
treea96907b179ccbeb84cd1df5515cd10c90eb5bd59 /block/elevator.c
parentb080cee72ef355669cbc52ff55dc513d37433600 (diff)
parent8f9e7b65f833cb9a4b2e2f54a049d74df394d906 (diff)
downloadlinux-616355cc818c6ddadc393fdfd4491f94458cb715.tar.xz
Merge tag 'for-5.18/block-2022-03-18' of git://git.kernel.dk/linux-block
Pull block updates from Jens Axboe: - BFQ cleanups and fixes (Yu, Zhang, Yahu, Paolo) - blk-rq-qos completion fix (Tejun) - blk-cgroup merge fix (Tejun) - Add offline error return value to distinguish it from an IO error on the device (Song) - IO stats fixes (Zhang, Christoph) - blkcg refcount fixes (Ming, Yu) - Fix for indefinite dispatch loop softlockup (Shin'ichiro) - blk-mq hardware queue management improvements (Ming) - sbitmap dead code removal (Ming, John) - Plugging merge improvements (me) - Show blk-crypto capabilities in sysfs (Eric) - Multiple delayed queue run improvement (David) - Block throttling fixes (Ming) - Start deprecating auto module loading based on dev_t (Christoph) - bio allocation improvements (Christoph, Chaitanya) - Get rid of bio_devname (Christoph) - bio clone improvements (Christoph) - Block plugging improvements (Christoph) - Get rid of genhd.h header (Christoph) - Ensure drivers use appropriate flush helpers (Christoph) - Refcounting improvements (Christoph) - Queue initialization and teardown improvements (Ming, Christoph) - Misc fixes/improvements (Barry, Chaitanya, Colin, Dan, Jiapeng, Lukas, Nian, Yang, Eric, Chengming) * tag 'for-5.18/block-2022-03-18' of git://git.kernel.dk/linux-block: (127 commits) block: cancel all throttled bios in del_gendisk() block: let blkcg_gq grab request queue's refcnt block: avoid use-after-free on throttle data block: limit request dispatch loop duration block/bfq-iosched: Fix spelling mistake "tenative" -> "tentative" sr: simplify the local variable initialization in sr_block_open() block: don't merge across cgroup boundaries if blkcg is enabled block: fix rq-qos breakage from skipping rq_qos_done_bio() block: flush plug based on hardware and software queue order block: ensure plug merging checks the correct queue at least once block: move rq_qos_exit() into disk_release() block: do more work in elevator_exit block: move blk_exit_queue into disk_release block: move q_usage_counter release into blk_queue_release block: don't remove hctx debugfs dir from blk_mq_exit_queue block: move blkcg initialization/destroy into disk allocation/release handler sr: implement ->free_disk to simplify refcounting sd: implement ->free_disk to simplify refcounting sd: delay calling free_opal_dev sd: call sd_zbc_release_disk before releasing the scsi_device reference ...
Diffstat (limited to 'block/elevator.c')
-rw-r--r--block/elevator.c16
1 files changed, 8 insertions, 8 deletions
diff --git a/block/elevator.c b/block/elevator.c
index 482df2a350fc..c319765892bb 100644
--- a/block/elevator.c
+++ b/block/elevator.c
@@ -35,7 +35,6 @@
#include <linux/hash.h>
#include <linux/uaccess.h>
#include <linux/pm_runtime.h>
-#include <linux/blk-cgroup.h>
#include <trace/events/block.h>
@@ -44,6 +43,7 @@
#include "blk-mq-sched.h"
#include "blk-pm.h"
#include "blk-wbt.h"
+#include "blk-cgroup.h"
static DEFINE_SPINLOCK(elv_list_lock);
static LIST_HEAD(elv_list);
@@ -192,6 +192,9 @@ void elevator_exit(struct request_queue *q)
{
struct elevator_queue *e = q->elevator;
+ ioc_clear_queue(q);
+ blk_mq_sched_free_rqs(q);
+
mutex_lock(&e->sysfs_lock);
blk_mq_exit_sched(q, e);
mutex_unlock(&e->sysfs_lock);
@@ -516,9 +519,11 @@ int elv_register_queue(struct request_queue *q, bool uevent)
void elv_unregister_queue(struct request_queue *q)
{
+ struct elevator_queue *e = q->elevator;
+
lockdep_assert_held(&q->sysfs_lock);
- if (q) {
+ if (e && e->registered) {
struct elevator_queue *e = q->elevator;
kobject_uevent(&e->kobj, KOBJ_REMOVE);
@@ -591,11 +596,7 @@ int elevator_switch_mq(struct request_queue *q,
lockdep_assert_held(&q->sysfs_lock);
if (q->elevator) {
- if (q->elevator->registered)
- elv_unregister_queue(q);
-
- ioc_clear_queue(q);
- blk_mq_sched_free_rqs(q);
+ elv_unregister_queue(q);
elevator_exit(q);
}
@@ -606,7 +607,6 @@ int elevator_switch_mq(struct request_queue *q,
if (new_e) {
ret = elv_register_queue(q, true);
if (ret) {
- blk_mq_sched_free_rqs(q);
elevator_exit(q);
goto out;
}