Jens Axboe 3a07bb1d76 blk-mq: fix potential oops with polling and blk-mq scheduler ...

If we have a scheduler attached, blk_mq_tag_to_rq() on the
scheduled tags will return NULL if a request is no longer
in flight. This is different than using the normal tags,
where it will always return the fixed request. Check for
this condition for polling, in case we happen to enter
polling for a completed request.

The request address remains valid, so this check and return
should be perfectly safe.

Fixes: bd166ef183c2 ("blk-mq-sched: add framework for MQ capable IO schedulers")
Tested-by: Stephen Bates <sbates@raithlin.com>
Signed-off-by: Jens Axboe <axboe@fb.com>

2017-04-20 14:53:28 -06:00

..

partitions

partitions/efi: Fix integer overflow in GPT size calculation

2017-01-17 09:02:31 -07:00

badblocks.c

badblocks: badblocks_set/clear update unacked_exist

2016-10-21 15:45:47 -06:00

bio-integrity.c

block: remove bio_is_rw

2016-10-28 08:45:17 -06:00

bio.c

blk: Ensure users for current->bio_list can see the full list.

2017-03-11 15:31:37 -07:00

blk-cgroup.c

sched/headers: Prepare to move signal wakeup & sigpending methods from <linux/sched.h> into <linux/sched/signal.h>

2017-03-02 08:42:32 +01:00

blk-core.c

blk: Ensure users for current->bio_list can see the full list.

2017-03-11 15:31:37 -07:00

blk-exec.c

block: introduce blk_rq_is_passthrough

2017-01-31 14:00:34 -07:00

blk-flush.c

block: don't defer flushes on blk-mq + scheduling

2017-02-17 12:35:47 -07:00

blk-integrity.c

block: Use pointer to backing_dev_info from request_queue

2017-02-02 08:20:48 -07:00

blk-ioc.c

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

2017-03-03 10:53:35 -08:00

blk-lib.c

block: don't try Write Same from __blkdev_issue_zeroout

2017-02-06 09:34:46 -07:00

blk-map.c

sched/headers: Prepare for new header dependencies before moving code to <linux/sched/task_stack.h>

2017-03-02 08:42:36 +01:00

blk-merge.c

block: optionally merge discontiguous discard bios into a single request

2017-02-08 13:43:08 -07:00

blk-mq-cpumap.c

blk-mq: export blk_mq_map_queues

2016-11-08 17:30:00 -05:00

blk-mq-debugfs.c

block: use same block debugfs directory for blk-mq and blktrace

2017-02-02 10:20:16 -07:00

blk-mq-pci.c

blk_mq: linux/blk-mq.h does not include all the headers it depends on

2016-09-19 08:21:51 -06:00

blk-mq-sched.c

blk-mq: Restart a single queue if tag sets are shared

2017-04-07 12:40:09 -06:00

blk-mq-sched.h

blk-mq: Restart a single queue if tag sets are shared

2017-04-07 12:40:09 -06:00

blk-mq-sysfs.c

blk-mq: free hctx->cpumask in release handler of hctx's kobject

2017-03-08 09:56:12 -07:00

blk-mq-tag.c

blk-mq: Fix tagset reinit in the presence of cpu hot-unplug

2017-03-13 08:14:23 -06:00

blk-mq-tag.h

blk-mq-sched: Allocate sched reserved tags as specified in the original queue tagset

2017-03-02 08:56:04 -07:00

blk-mq-virtio.c

blk-mq: provide a default queue mapping for virtio device

2017-02-27 20:54:05 +02:00

blk-mq.c

blk-mq: fix potential oops with polling and blk-mq scheduler

2017-04-20 14:53:28 -06:00

blk-mq.h

blk-mq: use the right hctx when getting a driver tag fails

2017-04-07 08:56:26 -06:00

blk-settings.c

block: optionally merge discontiguous discard bios into a single request

2017-02-08 13:43:08 -07:00

blk-softirq.c

sched/headers: Prepare for new header dependencies before moving code to <linux/sched/topology.h>

2017-03-02 08:42:26 +01:00

blk-stat.c

blk-stat: fix blk_stat_sum() if all samples are batched

2017-03-16 09:46:14 -06:00

blk-stat.h

block: add scalable completion tracking of requests

2016-11-10 13:53:26 -07:00

blk-sysfs.c

blk-mq-sched: fix crash in switch error path

2017-04-07 08:56:48 -06:00

blk-tag.c

blk-mq-sched: add framework for MQ capable IO schedulers

2017-01-17 10:04:20 -07:00

blk-throttle.c

scripts/spelling.txt: add "embeded" pattern and fix typo instances

2017-02-27 18:43:47 -08:00

blk-timeout.c

block: remove REQ_NO_TIMEOUT flag

2015-12-22 09:38:34 -07:00

blk-wbt.c

block: Use pointer to backing_dev_info from request_queue

2017-02-02 08:20:48 -07:00

blk-wbt.h

blk-wbt: allow wbt to be enabled always through sysfs

2016-11-28 10:27:03 -07:00

blk-zoned.c

block: Rename blk_queue_zone_size and bdev_zone_size

2017-01-12 07:58:32 -07:00

blk.h

block: optionally merge discontiguous discard bios into a single request

2017-02-08 13:43:08 -07:00

bounce.c

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

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

bsg-lib.c

block: split scsi_request out of struct request

2017-01-27 15:08:35 -07:00

bsg.c

lib/vsprintf.c: remove %Z support

2017-02-27 18:43:47 -08:00

cfq-iosched.c

sched/headers: Prepare for new header dependencies before moving code to <linux/sched/clock.h>

2017-03-02 08:42:27 +01:00

cmdline-parser.c

block: remove unrelated header files and export symbol

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

compat_ioctl.c

block: Get rid of blk_get_backing_dev_info()

2017-02-02 08:21:32 -07:00

deadline-iosched.c

block: enumify ELEVATOR_*_MERGE

2017-02-08 13:43:06 -07:00

elevator.c

block: respect BLK_MQ_F_NO_SCHED

2017-04-19 14:15:43 -06:00

genhd.c

Revert "scsi, block: fix duplicate bdi name registration crashes"

2017-03-08 10:55:17 -07:00

ioctl.c

block: Get rid of blk_get_backing_dev_info()

2017-02-02 08:21:32 -07:00

ioprio.c

sched/headers: Prepare to move the task_lock()/unlock() APIs to <linux/sched/task.h>

2017-03-02 08:42:38 +01:00

Kconfig

virtio, vhost: optimizations, fixes

2017-03-02 13:53:13 -08:00

Kconfig.iosched

block: get rid of blk-mq default scheduler choice Kconfig entries

2017-02-22 13:19:45 -07:00

Makefile

virtio, vhost: optimizations, fixes

2017-03-02 13:53:13 -08:00

mq-deadline.c

block: enumify ELEVATOR_*_MERGE

2017-02-08 13:43:06 -07:00

noop-iosched.c

block: move existing elevator ops to union

2017-01-17 10:03:33 -07:00

opal_proto.h

block/sed-opal: allocate struct opal_dev dynamically

2017-02-17 12:41:47 -07:00

partition-generic.c

block: Rename blk_queue_zone_size and bdev_zone_size

2017-01-12 07:58:32 -07:00

scsi_ioctl.c

block: fold cmd_type into the REQ_OP_ space

2017-01-31 14:00:44 -07:00

sed-opal.c

block/sed: Fix opal user range check and unused variables

2017-03-08 09:56:12 -07:00

t10-pi.c

block: Consolidate static integrity profile properties

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