kernel_optimize_test/block
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: bd166ef183 ("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
badblocks.c
bio-integrity.c
bio.c
blk-cgroup.c
blk-core.c
blk-exec.c
blk-flush.c
blk-integrity.c
blk-ioc.c
blk-lib.c
blk-map.c
blk-merge.c
blk-mq-cpumap.c
blk-mq-debugfs.c
blk-mq-pci.c
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-tag.c
blk-mq-tag.h
blk-mq-virtio.c
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
blk-softirq.c
blk-stat.c
blk-stat.h
blk-sysfs.c blk-mq-sched: fix crash in switch error path 2017-04-07 08:56:48 -06:00
blk-tag.c
blk-throttle.c
blk-timeout.c
blk-wbt.c
blk-wbt.h
blk-zoned.c
blk.h
bounce.c
bsg-lib.c
bsg.c
cfq-iosched.c
cmdline-parser.c
compat_ioctl.c
deadline-iosched.c
elevator.c block: respect BLK_MQ_F_NO_SCHED 2017-04-19 14:15:43 -06:00
genhd.c
ioctl.c
ioprio.c
Kconfig
Kconfig.iosched
Makefile
mq-deadline.c
noop-iosched.c
opal_proto.h
partition-generic.c
scsi_ioctl.c
sed-opal.c
t10-pi.c