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
  ...

1 files changed, 12 insertions, 29 deletions

diff --git a/drivers/md/dm-thin.c b/drivers/md/dm-thin.c
index ec119d2422d5..f4234d615aa1 100644
--- a/drivers/md/dm-thin.c
+++ b/drivers/md/dm-thin.c
@@ -282,8 +282,6 @@ struct pool {
 	struct dm_bio_prison_cell **cell_sort_array;
 
 	mempool_t mapping_pool;
-
-	struct bio flush_bio;
 };
 
 static void metadata_operation_failed(struct pool *pool, const char *op, int r);
@@ -1179,25 +1177,17 @@ static void process_prepared_discard_passdown_pt1(struct dm_thin_new_mapping *m)
 		return;
 	}
 
-	discard_parent = bio_alloc(GFP_NOIO, 1);
-	if (!discard_parent) {
-		DMWARN("%s: unable to allocate top level discard bio for passdown. Skipping passdown.",
-		       dm_device_name(tc->pool->pool_md));
-		queue_passdown_pt2(m);
-
-	} else {
-		discard_parent->bi_end_io = passdown_endio;
-		discard_parent->bi_private = m;
-
-		if (m->maybe_shared)
-			passdown_double_checking_shared_status(m, discard_parent);
-		else {
-			struct discard_op op;
-
-			begin_discard(&op, tc, discard_parent);
-			r = issue_discard(&op, m->data_block, data_end);
-			end_discard(&op, r);
-		}
+	discard_parent = bio_alloc(NULL, 1, 0, GFP_NOIO);
+	discard_parent->bi_end_io = passdown_endio;
+	discard_parent->bi_private = m;
+ 	if (m->maybe_shared)
+ 		passdown_double_checking_shared_status(m, discard_parent);
+ 	else {
+		struct discard_op op;
+
+		begin_discard(&op, tc, discard_parent);
+		r = issue_discard(&op, m->data_block, data_end);
+		end_discard(&op, r);
 	}
 }
 
@@ -2913,7 +2903,6 @@ static void __pool_destroy(struct pool *pool)
 	if (pool->next_mapping)
 		mempool_free(pool->next_mapping, &pool->mapping_pool);
 	mempool_exit(&pool->mapping_pool);
-	bio_uninit(&pool->flush_bio);
 	dm_deferred_set_destroy(pool->shared_read_ds);
 	dm_deferred_set_destroy(pool->all_io_ds);
 	kfree(pool);
@@ -2994,7 +2983,6 @@ static struct pool *pool_create(struct mapped_device *pool_md,
 	pool->low_water_triggered = false;
 	pool->suspended = true;
 	pool->out_of_data_space = false;
-	bio_init(&pool->flush_bio, NULL, 0);
 
 	pool->shared_read_ds = dm_deferred_set_create();
 	if (!pool->shared_read_ds) {
@@ -3201,13 +3189,8 @@ static void metadata_low_callback(void *context)
 static int metadata_pre_commit_callback(void *context)
 {
 	struct pool *pool = context;
-	struct bio *flush_bio = &pool->flush_bio;
-
-	bio_reset(flush_bio);
-	bio_set_dev(flush_bio, pool->data_dev);
-	flush_bio->bi_opf = REQ_OP_WRITE | REQ_PREFLUSH;
 
-	return submit_bio_wait(flush_bio);
+	return blkdev_issue_flush(pool->data_dev);
 }
 
 static sector_t get_dev_size(struct block_device *bdev)