AuxXxilium/linux_dsm_epyc7002
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Ming Lei c6064ee6c2 blk-iocost: fix lockdep warning on blkcg->lock 
[ Upstream commit 11431e26c9c43fa26f6b33ee1a90989f57b86024 ]

blkcg->lock depends on q->queue_lock which may depend on another driver
lock required in irq context, one example is dm-thin:

	Chain exists of:
	  &pool->lock#3 --> &q->queue_lock --> &blkcg->lock

	 Possible interrupt unsafe locking scenario:

	       CPU0                    CPU1
	       ----                    ----
	  lock(&blkcg->lock);
	                               local_irq_disable();
	                               lock(&pool->lock#3);
	                               lock(&q->queue_lock);
	  <Interrupt>
	    lock(&pool->lock#3);

Fix the issue by using spin_lock_irq(&blkcg->lock) in ioc_weight_write().

Cc: Tejun Heo <tj@kernel.org>
Reported-by: Bruno Goncalves <bgoncalv@redhat.com>
Link: https://lore.kernel.org/linux-block/CA+QYu4rzz6079ighEanS3Qq_Dmnczcf45ZoJoHKVLVATTo1e4Q@mail.gmail.com/T/#u
Signed-off-by: Ming Lei <ming.lei@redhat.com>
Acked-by: Tejun Heo <tj@kernel.org>
Link: https://lore.kernel.org/r/20210803070608.1766400-1-ming.lei@redhat.com
Signed-off-by: Jens Axboe <axboe@kernel.dk>
Signed-off-by: Sasha Levin <sashal@kernel.org>
2024-07-05 18:56:55 +02:00
..
partitions init: add dsm gpl source 2024-07-05 18:00:04 +02:00
badblocks.c treewide: Use fallthrough pseudo-keyword 2020-08-23 17:36:59 -05:00
bfq-cgroup.c bfq: fix blkio cgroup leakage v4 2020-08-18 07:48:08 -07:00
bfq-iosched.c kyber: fix out of bounds access when preempted 2021-05-19 10:13:13 +02:00
bfq-iosched.h bfq: fix blkio cgroup leakage v4 2020-08-18 07:48:08 -07:00
bfq-wf2q.c bfq: fix blkio cgroup leakage v4 2020-08-18 07:48:08 -07:00
bio-integrity.c block: make function __bio_integrity_free() static 2020-07-02 12:38:18 -06:00
bio.c init: add dsm gpl source 2024-07-05 18:00:04 +02:00
blk-cgroup-rwstat.c blk-cgroup: Fix the recursive blkg rwstat 2021-03-30 14:31:48 +02:00
blk-cgroup-rwstat.h blk-cgroup: separate out blkg_rwstat under CONFIG_BLK_CGROUP_RWSTAT 2019-11-07 12:28:13 -07:00
blk-cgroup.c blk-cgroup: Use cond_resched() when destroy blkgs 2021-02-13 13:55:13 +01:00
blk-core.c init: add dsm gpl source 2024-07-05 18:00:04 +02:00
blk-crypto-fallback.c block: rename generic_make_request to submit_bio_noacct 2020-07-01 07:27:24 -06:00
blk-crypto-internal.h block: make blk_crypto_rq_bio_prep() able to fail 2020-10-05 10:47:43 -06:00
blk-crypto.c block: warn if !__GFP_DIRECT_RECLAIM in bio_crypt_set_ctx() 2020-10-05 10:47:43 -06:00
blk-exec.c block: add a blk_account_io_merge_bio helper 2020-05-27 05:21:23 -06:00
blk-flush.c init: add dsm gpl source 2024-07-05 18:00:04 +02:00
blk-integrity.c block: remove the unused blk_integrity_merge_bio export 2020-10-06 07:29:53 -06:00
blk-ioc.c block: remove retry loop in ioc_release_fn() 2020-07-16 10:22:15 -06:00
blk-iocost.c blk-iocost: fix lockdep warning on blkcg->lock 2024-07-05 18:56:55 +02:00
blk-iolatency.c blk-iolatency: error out if blk_get_queue() failed in iolatency_set_limit() 2024-07-05 18:52:09 +02:00
blk-lib.c init: add dsm gpl source 2024-07-05 18:00:04 +02:00
blk-map.c init: add dsm gpl source 2024-07-05 18:00:04 +02:00
blk-merge.c init: add dsm gpl source 2024-07-05 18:00:04 +02:00
blk-mq-cpumap.c blk-mq: remove the calling of local_memory_node() 2020-10-20 07:08:17 -06:00
blk-mq-debugfs-zoned.c block: Cleanup license notice 2019-01-17 21:21:40 -07:00
blk-mq-debugfs.c blk-mq-debugfs: Add decode for BLK_MQ_F_TAG_HCTX_SHARED 2021-01-19 18:27:29 +01:00
blk-mq-debugfs.h blk-mq: no need to check return value of debugfs_create functions 2019-06-13 03:00:30 -06:00
blk-mq-pci.c block: Fix blk_mq_*_map_queues() kernel-doc headers 2019-05-31 15:12:34 -06:00
blk-mq-rdma.c block: Fix blk_mq_*_map_queues() kernel-doc headers 2019-05-31 15:12:34 -06:00
blk-mq-sched.c kyber: fix out of bounds access when preempted 2021-05-19 10:13:13 +02:00
blk-mq-sched.h block-5.10-2020-10-12 2020-10-13 12:12:44 -07:00
blk-mq-sysfs.c blk-mq: move cancel of hctx->run_work to the front of blk_exit_queue 2020-10-09 12:46:28 -06:00
blk-mq-tag.c blk-mq: clear stale request in tags->rq[] before freeing one request pool 2021-07-14 16:55:58 +02:00
blk-mq-tag.h blk-mq: clear stale request in tags->rq[] before freeing one request pool 2021-07-14 16:55:58 +02:00
blk-mq-virtio.c blk-mq: Fix typo in comment 2020-03-17 20:55:21 +01:00
blk-mq.c init: add dsm gpl source 2024-07-05 18:00:04 +02:00
blk-mq.h blk-mq: grab rq->refcount before calling ->fn in blk_mq_tagset_busy_iter 2021-07-14 16:55:58 +02:00
blk-pm.c scsi: block: Fix a race in the runtime power management code 2021-01-06 14:56:50 +01:00
blk-pm.h scsi: block: Do not accept any requests while suspended 2021-01-12 20:18:17 +01:00
blk-rq-qos.c rq-qos: fix missed wake-ups in rq_qos_throttle try two 2021-07-19 09:45:00 +02:00
blk-rq-qos.h block: fix race between adding/removing rq qos and normal IO 2021-07-14 16:56:00 +02:00
blk-settings.c blk-settings: align max_sectors on "logical_block_size" boundary 2021-03-04 11:38:22 +01:00
blk-stat.c blk-stat: make q->stats->lock irqsafe 2020-09-01 16:48:46 -06:00
blk-stat.h block: deactivate blk_stat timer in wbt_disable_default() 2018-12-12 06:47:51 -07:00
blk-sysfs.c init: add dsm gpl source 2024-07-05 18:00:04 +02:00
blk-throttle.c blk-throttle: Re-use the throtl_set_slice_end() 2020-10-08 08:01:38 -06:00
blk-timeout.c block: blk-timeout: delete duplicated word 2020-07-31 16:29:47 -06:00
blk-wbt.c blk-wbt: make sure throttle is enabled properly 2021-07-14 16:56:12 +02:00
blk-wbt.h blk-wbt: introduce a new disable state to prevent false positive by rwb_enabled() 2021-07-14 16:56:12 +02:00
blk-zoned.c block: Fix REQ_OP_ZONE_RESET_ALL handling 2021-03-30 14:31:51 +02:00
blk.h init: add dsm gpl source 2024-07-05 18:00:04 +02:00
bounce.c init: add dsm gpl source 2024-07-05 18:00:04 +02:00
bsg-lib.c block: drop double zeroing 2020-09-23 09:18:13 -06:00
bsg.c bsg: free the request before return error code 2021-03-04 11:37:42 +01:00
cmdline-parser.c License cleanup: add SPDX GPL-2.0 license identifier to files with no license 2017-11-02 11:10:55 +01:00
elevator.c init: add dsm gpl source 2024-07-05 18:00:04 +02:00
genhd.c init: add dsm gpl source 2024-07-05 18:00:04 +02:00
ioctl.c init: add dsm gpl source 2024-07-05 18:00:04 +02:00
ioprio.c block: grant IOPRIO_CLASS_RT to CAP_SYS_NICE 2020-09-01 19:38:33 -06:00
Kconfig blk-wbt: Remove obsolete multiqueue I/O scheduling comment 2020-09-01 16:49:26 -06:00
Kconfig.iosched treewide: replace '---help---' in Kconfig files with 'help' 2020-06-14 01:57:21 +09:00
keyslot-manager.c block/keyslot-manager: prevent crash when num_slots=1 2020-11-20 11:52:52 -07:00
kyber-iosched.c kyber: fix out of bounds access when preempted 2021-05-19 10:13:13 +02:00
Makefile blk-mq: merge blk-softirq.c into blk-mq.c 2020-06-24 09:15:56 -06:00
mq-deadline.c kyber: fix out of bounds access when preempted 2021-05-19 10:13:13 +02:00
opal_proto.h block: sed-opal: Change the check condition for regular session validity 2020-03-12 08:00:10 -06:00
scsi_ioctl.c init: add dsm gpl source 2024-07-05 18:00:04 +02:00
sed-opal.c block: sed-opal: Change the check condition for regular session validity 2020-03-12 08:00:10 -06:00
t10-pi.c block: Allow t10-pi to be modular 2020-01-06 20:59:04 -07:00