Ming Lei
ec1b6ab9fe
BACKPORT: blk-mq: fix is_flush_rq ...
is_flush_rq() is called from bt_iter()/bt_tags_iter(), and runs the
following check:
hctx->fq->flush_rq == req
but the passed hctx from bt_iter()/bt_tags_iter() may be NULL because:
1) memory re-order in blk_mq_rq_ctx_init():
rq->mq_hctx = data->hctx;
...
refcount_set(&rq->ref, 1);
OR
2) tag re-use and ->rqs[] isn't updated with new request.
Fix the issue by re-writing is_flush_rq() as:
return rq->end_io == flush_end_io;
which turns out simpler to follow and immune to data race since we have
ordered WRITE rq->end_io and refcount_set(&rq->ref, 1).
Fixes: 2e315dc07df0 ("blk-mq: grab rq->refcount before calling ->fn in
blk_mq_tagset_busy_iter")
Cc: "Blank-Burian, Markus, Dr." <blankburian@uni-muenster.de>
Cc: Yufen Yu <yuyufen@huawei.com>
Signed-off-by: Ming Lei <ming.lei@redhat.com>
Bug: 197804811
Change-Id: Iba551d228e5cd96749c13f4c19e13687b0e89196
(cherry picked from commit a9ed27a764156929efe714033edb3e9023c5f321)
[Pradeep: Resolved conflicts in block/blk.h]
Signed-off-by: Pradeep P V K <pragalla@codeaurora.org>
2021-08-31 18:35:29 +00:00
bfq: fix blkio cgroup leakage v4
2020-09-03 11:26:54 +02:00
kyber: fix out of bounds access when preempted
2021-05-19 10:08:30 +02:00
bfq: fix blkio cgroup leakage v4
2020-09-03 11:26:54 +02:00
bfq: fix blkio cgroup leakage v4
2020-09-03 11:26:54 +02:00
This is the 5.4.113 stable release
2021-04-16 12:16:55 +02:00
blk-cgroup: Use cond_resched() when destroy blkgs
2021-02-13 13:52:56 +01:00
This is the 5.4.96 stable release
2021-02-07 16:03:32 +01:00
BACKPORT: blk-mq: fix is_flush_rq
2021-08-31 18:35:29 +00:00
blk-iocost: ioc_pd_free() shouldn't assume irq disabled
2020-09-09 19:12:35 +02:00
This is the 5.4.132 stable release
2021-07-14 17:12:58 +02:00
kyber: fix out of bounds access when preempted
2021-05-19 10:08:30 +02:00
block: only call sched requeue_request() for scheduled requests
2020-09-23 12:40:37 +02:00
blk-mq: move cancel of hctx->run_work to the front of blk_exit_queue
2020-10-29 09:57:34 +01:00
BACKPORT: blk-mq: clear stale request in tags->rq[] before freeing one request pool
2021-08-31 18:34:56 +00:00
BACKPORT: blk-mq: clear stale request in tags->rq[] before freeing one request pool
2021-08-31 18:34:56 +00:00
BACKPORT: blk-mq: fix is_flush_rq
2021-08-31 18:35:29 +00:00
BACKPORT: blk-mq: grab rq->refcount before calling ->fn in blk_mq_tagset_busy_iter
2021-08-31 18:34:10 +00:00
This is the 5.4.87 stable release
2021-01-06 09:12:49 -08:00
rq-qos: fix missed wake-ups in rq_qos_throttle try two
2021-07-19 08:53:16 +02:00
block: fix race between adding/removing rq qos and normal IO
2021-07-14 16:53:18 +02:00
blk-settings: align max_sectors on "logical_block_size" boundary
2021-03-04 10:26:40 +01:00
blk-mq: move cancel of hctx->run_work to the front of blk_exit_queue
2020-10-29 09:57:34 +01:00
blk-wbt: make sure throttle is enabled properly
2021-07-14 16:53:25 +02:00
blk-wbt: introduce a new disable state to prevent false positive by rwb_enabled()
2021-07-14 16:53:25 +02:00
block: Simplify REQ_OP_ZONE_RESET_ALL handling
2020-12-30 11:50:54 +01:00
BACKPORT: blk-mq: fix is_flush_rq
2021-08-31 18:35:29 +00:00
bsg: free the request before return error code
2021-03-04 10:26:22 +01:00
block: Suppress uevent for hidden device when removed
2021-03-30 14:35:23 +02:00
kyber: fix out of bounds access when preempted
2021-05-19 10:08:30 +02:00
kyber: fix out of bounds access when preempted
2021-05-19 10:08:30 +02:00
ANDROID: Add OWNERS files referring to the respective android-mainline OWNERS
2021-04-01 13:45:14 +00:00
ec1b6ab9fe