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Bart Van Assche fd9c40f64c block: Revert v5.0 blk_mq_request_issue_directly() changes 
blk_mq_try_issue_directly() can return BLK_STS*_RESOURCE for requests that
have been queued. If that happens when blk_mq_try_issue_directly() is called
by the dm-mpath driver then dm-mpath will try to resubmit a request that is
already queued and a kernel crash follows. Since it is nontrivial to fix
blk_mq_request_issue_directly(), revert the blk_mq_request_issue_directly()
changes that went into kernel v5.0.

This patch reverts the following commits:
* d6a51a97c0 ("blk-mq: replace and kill blk_mq_request_issue_directly") # v5.0.
* 5b7a6f128a ("blk-mq: issue directly with bypass 'false' in blk_mq_sched_insert_requests") # v5.0.
* 7f556a44e6 ("blk-mq: refactor the code of issue request directly") # v5.0.

Cc: Christoph Hellwig <hch@infradead.org>
Cc: Ming Lei <ming.lei@redhat.com>
Cc: Jianchao Wang <jianchao.w.wang@oracle.com>
Cc: Hannes Reinecke <hare@suse.com>
Cc: Johannes Thumshirn <jthumshirn@suse.de>
Cc: James Smart <james.smart@broadcom.com>
Cc: Dongli Zhang <dongli.zhang@oracle.com>
Cc: Laurence Oberman <loberman@redhat.com>
Cc: <stable@vger.kernel.org>
Reported-by: Laurence Oberman <loberman@redhat.com>
Tested-by: Laurence Oberman <loberman@redhat.com>
Fixes: 7f556a44e6 ("blk-mq: refactor the code of issue request directly") # v5.0.
Signed-off-by: Bart Van Assche <bvanassche@acm.org>
Signed-off-by: Jens Axboe <axboe@kernel.dk>
 		2019-04-05 09:40:46 -06:00
..
partitions partitions/aix: append null character to print data from disk 2018-07-27 09:17:41 -06:00
Kconfig Kconfig updates for v4.21 2018-12-29 13:03:29 -08:00
Kconfig.iosched block: remove legacy IO schedulers 2018-11-07 13:42:32 -07:00
Makefile block: remove legacy IO schedulers 2018-11-07 13:42:32 -07:00
badblocks.c badblocks: fix wrong return value in badblocks_set if badblocks are disabled 2017-11-03 11:29:50 -07:00
bfq-cgroup.c blkcg: fix ref count issue with bio_blkcg() using task_css 2018-12-07 22:26:36 -07:00
bfq-iosched.c block/bfq: fix ifdef for CONFIG_BFQ_GROUP_IOSCHED=y 2019-04-01 06:56:15 -06:00
bfq-iosched.h block, bfq: fix in-service-queue check for queue merging 2019-01-31 12:50:24 -07:00
bfq-wf2q.c block/bfq: fix ifdef for CONFIG_BFQ_GROUP_IOSCHED=y 2019-04-01 06:56:15 -06:00
bio-integrity.c block: remove the bio_integrity_advance export 2018-12-16 08:33:57 -07:00
bio.c block: add BIO_NO_PAGE_REF flag 2019-03-18 10:44:48 -06:00
blk-cgroup.c blkcg: Fix kernel-doc warnings 2019-03-20 14:39:09 -06:00
blk-core.c block: Revert v5.0 blk_mq_request_issue_directly() changes 2019-04-05 09:40:46 -06:00
blk-exec.c block: remove dead elevator code 2018-11-07 13:42:32 -07:00
blk-flush.c blk-mq: use blk_mq_put_driver_tag() to put tag 2019-03-24 10:26:16 -06:00
blk-integrity.c block: merge BIOVEC_SEG_BOUNDARY into biovec_phys_mergeable 2018-09-24 12:33:57 -06:00
blk-ioc.c block: remove the queue_lock indirection 2018-11-15 12:17:28 -07:00
blk-iolatency.c blk-iolatency: #include "blk.h" 2019-03-20 14:19:38 -06:00
blk-lib.c block: fix 32 bit overflow in __blkdev_issue_discard() 2018-11-14 08:17:18 -07:00
blk-map.c Merge branch 'for-4.16/block' of git://git.kernel.dk/linux-block 2018-01-29 11:51:49 -08:00
blk-merge.c block: fix segment calculation for passthrough IO 2019-03-06 09:42:54 -07:00
blk-mq-cpumap.c blk-mq: initial support for multiple queue maps 2018-11-07 13:45:00 -07:00
blk-mq-debugfs-zoned.c block: Cleanup license notice 2019-01-17 21:21:40 -07:00
blk-mq-debugfs.c SCSI misc on 20190306 2019-03-09 16:53:47 -08:00
blk-mq-debugfs.h blk-mq-debugfs: support rq_qos 2018-12-16 19:53:47 -07:00
blk-mq-pci.c blk-mq: initial support for multiple queue maps 2018-11-07 13:45:00 -07:00
blk-mq-rdma.c blk-mq-rdma: pass in queue map to blk_mq_rdma_map_queues 2018-12-13 09:59:08 +01:00
blk-mq-sched.c block: Revert v5.0 blk_mq_request_issue_directly() changes 2019-04-05 09:40:46 -06:00
blk-mq-sched.h block: mq-deadline: Fix write completion handling 2018-12-17 11:19:39 -07:00
blk-mq-sysfs.c blk-mq: export hctx->type in debugfs instead of sysfs 2018-12-17 05:44:45 -07:00
blk-mq-tag.c blk-mq: save queue mapping result into ctx directly 2019-02-01 08:33:04 -07:00
blk-mq-tag.h Merge branch 'for-4.15/block' of git://git.kernel.dk/linux-block 2017-11-14 15:32:19 -08:00
blk-mq-virtio.c blk-mq: initial support for multiple queue maps 2018-11-07 13:45:00 -07:00
blk-mq.c block: Revert v5.0 blk_mq_request_issue_directly() changes 2019-04-05 09:40:46 -06:00
blk-mq.h block: Revert v5.0 blk_mq_request_issue_directly() changes 2019-04-05 09:40:46 -06:00
blk-pm.c block: remove the queue_lock indirection 2018-11-15 12:17:28 -07:00
blk-pm.h block: remove the queue_lock indirection 2018-11-15 12:17:28 -07:00
blk-rq-qos.c blk-mq-debugfs: support rq_qos 2018-12-16 19:53:47 -07:00
blk-rq-qos.h block: fix blk-iolatency accounting underflow 2018-12-17 11:19:54 -07:00
blk-settings.c block: kill QUEUE_FLAG_FLUSH_NQ 2019-02-09 15:40:24 -07:00
blk-softirq.c block: remove a few unused exports 2018-11-15 12:13:25 -07:00
blk-stat.c block: remove a few unused exports 2018-11-15 12:13:25 -07:00
blk-stat.h block: deactivate blk_stat timer in wbt_disable_default() 2018-12-12 06:47:51 -07:00
blk-sysfs.c block: add BLK_MQ_POLL_CLASSIC for hybrid poll and return EINVAL for unexpected value 2019-03-20 14:02:07 -06:00
blk-throttle.c blkcg: consolidate bio_issue_init() to be a part of core 2018-12-07 22:26:37 -07:00
blk-timeout.c block: don't hold the queue_lock over blk_abort_request 2018-11-15 12:13:18 -07:00
blk-wbt.c blk-wbt: Declare local functions static 2019-01-24 11:09:21 -07:00
blk-wbt.h block: remove external dependency on wbt_flags 2018-07-09 09:07:54 -06:00
blk-zoned.c for-4.21/block-20181221 2018-12-28 13:19:59 -08:00
blk.h blk-mq: save queue mapping result into ctx directly 2019-02-01 08:33:04 -07:00
bounce.c block: bounce: make sure that bvec table is updated 2019-02-21 10:58:44 -07:00
bsg-lib.c scsi: bsg-lib: handle bidi requests without block layer help 2019-02-05 21:27:40 -05:00
bsg.c scsi: bsg-lib: handle bidi requests without block layer help 2019-02-05 21:27:40 -05:00
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
compat_ioctl.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 block: avoid setting none scheduler if it's already none 2019-02-11 08:21:40 -07:00
genhd.c block: Replace function name in string with __func__ 2019-02-28 14:09:08 -07:00
ioctl.c block: Introduce BLKGETNRZONES ioctl 2018-10-25 11:17:40 -06:00
ioprio.c block: add ioprio_check_cap function 2018-05-31 10:50:54 -04:00
kyber-iosched.c kyber: use sbitmap add_wait_queue/list_del wait helpers 2018-12-20 12:17:21 -07:00
mq-deadline.c block: mq-deadline: Fix write completion handling 2018-12-17 11:19:39 -07:00
opal_proto.h block: sed-opal: Set MBRDone on S3 resume path if TPER is MBREnabled 2017-09-11 09:45:52 -06:00
partition-generic.c block: return just one value from part_in_flight 2018-12-10 08:30:38 -07:00
scsi_ioctl.c block: consistently use GFP_NOIO instead of __GFP_NORECLAIM 2018-05-14 08:55:18 -06:00
sed-opal.c block: sed-opal: Fix a couple off by one bugs 2018-06-20 12:04:06 -06:00
t10-pi.c block: move dif_prepare/dif_complete functions to block layer 2018-07-30 08:27:02 -06:00