[PATCH v3 0/8] blk-mq: various fixes and cleanups

[Omar Sandoval <osandov@osandov.com>]

From: Omar Sandoval <osandov@fb.com>

Rebase of v2 [1] onto block-next. As with v2,

- Patch 1 is the new fix for a hang that Josef reported after trying v1.
- Patches 2-6 are the original series. Patch 5 now has Christoph's and
  Sagi's Reviewed-by.
- Patches 7 and 8 are trivial cleanups.

Patches 1-5 should probably go into 4.11, and 6-8 are for 4.12.

1: http://marc.info/?l=linux-block&m=149141696306216&w=2

Omar Sandoval (8):
  blk-mq: use the right hctx when getting a driver tag fails
  blk-mq-sched: refactor scheduler initialization
  blk-mq-sched: set up scheduler tags when bringing up new queues
  blk-mq-sched: fix crash in switch error path
  blk-mq: remap queues when adding/removing hardware queues
  blk-mq-sched: provide hooks for initializing hardware queue data
  blk-mq: make driver tag failure path easier to follow
  blk-mq: use true instead of 1 for blk_mq_queue_data.last

 block/blk-mq-sched.c     | 187 +++++++++++++++++++++++++++++------------------
 block/blk-mq-sched.h     |  13 ++--
 block/blk-mq.c           |  71 ++++++++++--------
 block/blk-mq.h           |   2 +-
 block/blk-sysfs.c        |   2 +-
 block/elevator.c         | 114 +++++++++++++++--------------
 include/linux/elevator.h |   4 +-
 7 files changed, 227 insertions(+), 166 deletions(-)

-- 
2.12.2