Keith Busch d4d7444936 blk-mq: Allow blocking queue tag iter callbacks ...

commit 530ca2c9bd upstream.

A recent commit runs tag iterator callbacks under the rcu read lock,
but existing callbacks do not satisfy the non-blocking requirement.
The commit intended to prevent an iterator from accessing a queue that's
being modified. This patch fixes the original issue by taking a queue
reference instead of reading it, which allows callbacks to make blocking
calls.

Fixes: f5bbbbe4d6 ("blk-mq: sync the update nr_hw_queues with blk_mq_queue_tag_busy_iter")
Acked-by: Jianchao Wang <jianchao.w.wang@oracle.com>
Signed-off-by: Keith Busch <keith.busch@intel.com>
Signed-off-by: Jens Axboe <axboe@kernel.dk>
Signed-off-by: Giuliano Procida <gprocida@google.com>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>

2020-04-13 10:32:52 +02:00

..

partitions

partitions/aix: fix usage of uninitialized lv_info and lvname structures

2018-09-19 22:47:15 +02:00

badblocks.c

badblocks: fix wrong return value in badblocks_set if badblocks are disabled

2017-12-20 10:07:29 +01:00

bio-integrity.c

bio-integrity: Do not allocate integrity context for bio w/o data

2018-04-13 19:48:18 +02:00

bio.c

block: do not leak memory in bio_copy_user_iov()

2019-04-17 08:36:46 +02:00

blk-cgroup.c

block,blkcg: use __GFP_NOWARN for best-effort allocations in blkcg

2018-09-19 22:47:11 +02:00

blk-core.c

block: blk_init_allocated_queue() set q->fq as NULL in the fail case

2019-08-11 12:22:18 +02:00

blk-exec.c

block: Fix spelling in a source code comment

2016-07-20 21:28:22 -06:00

blk-flush.c

block: flush: fix IO hang in case of flood fua req

2016-10-26 07:49:27 -06:00

blk-integrity.c

block: fix blk_integrity_register to use template's interval_exp if not 0

2017-05-20 14:28:36 +02:00

blk-ioc.c

mm, page_alloc: distinguish between being unable to sleep, unwilling to sleep and avoiding waking kswapd

2015-11-06 17:50:42 -08:00

blk-lib.c

block: fix infinite loop if the device loses discard capability

2018-12-29 13:40:14 +01:00

blk-map.c

block: fix memleak when __blk_rq_map_user_iov() is failed

2020-01-12 11:24:24 +01:00

blk-merge.c

block: don't use bio->bi_vcnt to figure out segment number

2020-01-29 10:24:15 +01:00

blk-mq-cpumap.c

blk-mq: allow the driver to pass in a queue mapping

2016-09-15 08:42:03 -06:00

blk-mq-pci.c

blk-mq-pci: add a fallback when pci_irq_get_affinity returns NULL

2017-08-24 17:12:20 -07:00

blk-mq-sysfs.c

blk-mq: make sure that line break can be printed

2019-12-21 10:42:18 +01:00

blk-mq-tag.c

blk-mq: Allow blocking queue tag iter callbacks

2020-04-13 10:32:52 +02:00

blk-mq-tag.h

Merge branch 'for-4.9/block-irq' of git://git.kernel.dk/linux-block

2016-10-09 17:29:33 -07:00

blk-mq.c

blk-mq: sync the update nr_hw_queues with blk_mq_queue_tag_busy_iter

2020-04-13 10:32:52 +02:00

blk-mq.h

blk-mq: initialize mq kobjects in blk_mq_init_allocated_queue()

2017-12-14 09:28:21 +01:00

blk-settings.c

block: fix an integer overflow in logical block size

2020-01-23 08:19:38 +01:00

blk-softirq.c

Merge tag 'gcc-plugins-v4.9-rc1' of git://git.kernel.org/pub/scm/linux/kernel/git/kees/linux

2016-10-15 10:03:15 -07:00

blk-sysfs.c

blk-mq: register device instead of disk

2016-09-21 07:56:16 -06:00

blk-tag.c

block: support different tag allocation policy

2015-01-23 14:15:46 -07:00

blk-throttle.c

blk-throttle: make sure expire time isn't too big

2018-03-22 09:17:44 +01:00

blk-timeout.c

block: Fix a race between blk_cleanup_queue() and timeout handling

2017-11-30 08:39:06 +00:00

blk.h

blk-mq: remove ->map_queue

2016-09-15 08:42:03 -06:00

bounce.c

Merge branch 'for-linus' of git://git.kernel.dk/linux-block

2015-09-19 18:57:09 -07:00

bsg-lib.c

Revert "bsg-lib: don't free job in bsg_prepare_job"

2017-10-21 17:21:33 +02:00

bsg.c

sg_write()/bsg_write() is not fit to be called under KERNEL_DS

2017-01-09 08:32:25 +01:00

cfq-iosched.c

block,blkcg: use __GFP_NOWARN for best-effort allocations in blkcg

2018-09-19 22:47:11 +02:00

cmdline-parser.c

block: remove unrelated header files and export symbol

2014-01-21 20:18:26 -08:00

compat_ioctl.c

compat_ioctl: block: handle Persistent Reservations

2020-01-12 11:24:13 +01:00

deadline-iosched.c

block: do not merge requests without consulting with io scheduler

2016-07-20 21:35:12 -06:00

elevator.c

block: Fix secure erase

2016-08-16 09:16:51 -06:00

genhd.c

block: fix bdi vs gendisk lifetime mismatch

2016-08-04 14:19:16 -06:00

ioctl.c

block: invalidate the page cache when issuing BLKZEROOUT

2016-10-11 15:06:30 -07:00

ioprio.c

block: fix use-after-free in sys_ioprio_get()

2016-07-01 08:39:24 -06:00

Kconfig

Merge branch 'for-4.9/block-irq' of git://git.kernel.dk/linux-block

2016-10-09 17:29:33 -07:00

Kconfig.iosched

blkcg: make CONFIG_BLK_CGROUP bool

2012-03-06 21:27:21 +01:00

Makefile

Merge branch 'for-4.9/block-smp' of git://git.kernel.dk/linux-block

2016-10-09 17:32:20 -07:00

noop-iosched.c

elevator: use list_{first,prev,next}_entry

2015-11-16 15:21:48 -07:00

partition-generic.c

block: fix an error code in add_partition()

2018-04-13 19:48:04 +02:00

scsi_ioctl.c

block: allow WRITE_SAME commands with the SG_IO ioctl

2017-03-22 12:43:38 +01:00

t10-pi.c

block: Consolidate static integrity profile properties

2015-10-21 14:42:38 -06:00