[GIT PULL] Block driver changes for 4.7-rc1

From: Jens Axboe
Date: Tue May 17 2016 - 11:35:43 EST

Hi Linus,

On top of the core pull request, this is the drivers pull request for
this merge window. This pull request contains:

- Switching drivers to the new write back cache API, and killing off the
flush flags. From me.

- Kill the discard support for the STEC pci-e flash driver. It's
trivially broken, and apparently unmaintained, so it's safer to just
remove it. From Jeff Moyer.

- A set of lightnvm updates from the usual suspects (Matias/Javier, and
Simon), and fixes from Arnd, Jeff Mahoney, Sagi, and Wenwei Tao.

- A set of updates for NVMe:

- Turn the controller state management into a proper state
machine. From Christoph. This ends up throwing a merge
conflict with a stable fix that went in later in the series,
see below for how to resolve.

- Shuffling of code in preparation for NVMe-over-fabrics, also
from Christoph.

- Cleanup of the command prep part from Ming Lin.

- Rewrite of the discard support from Ming Lin.

- Deadlock fix for namespace removal from Ming Lin.

- Use the now exported blk-mq tag helper for IO termination.
From Sagi.

- Various little fixes from Christoph, Guilherme, Keith, Ming
Lin, Wang Sheng-Hui.

- Convert mtip32xx to use the now exported blk-mq tag iter function,
from Keith.

As mentioned, there will be two small conflicts in nvme, due to a
removal fix that was sent in through for-linus later in the cycle. One
hunk is trivial to resolve (remove the test/set_bit, just call the state
change function), for the other see below, I've attached my resolution.
It's not hard either.

Please pull!

git://git.kernel.dk/linux-block.git for-4.7/drivers

Arnd Bergmann (1):
lightnvm: pass dma address to hardware rather than pointer

Christoph Hellwig (6):
nvme: fix cntlid type
nvme: remove the io_incapable method
nvme: introduce a controller state machine
nvme: tighten up state check for namespace scanning
nvme: move namespace scanning to core
nvme: move AER handling to common code

Guilherme G. Piccoli (1):
nvme: Avoid reset work on watchdog timer function during error recovery

Javier GonzÃlez (6):
lightnvm: do not free unused metadata on rrpc
lightnvm: enable metadata to be sent to device
lightnvm: rename dma helper functions
lightnvm: do not assume sequential lun alloc.
lightnvm: rename nr_pages to nr_ppas on nvm_rq
lightnvm: reserved space calculation incorrect

Jeff Mahoney (1):
lightnvm: fix "warning: âretâ may be used uninitialized"

Jeff Moyer (1):
skd: remove broken discard support

Jens Axboe (22):
Merge branch 'for-4.7/core' into for-4.7/drivers
sd: switch to using blk_queue_write_cache()
NVMe: switch to using blk_queue_write_cache()
drbd: switch to using blk_queue_write_cache()
loop: switch to using blk_queue_write_cache()
mtip32xx: remove call to blk_queue_flush()
nbd: switch to using blk_queue_write_cache()
osdblk: switch to using blk_queue_write_cache()
skd_main: switch to using blk_queue_write_cache()
ps3disk: switch to using blk_queue_write_cache()
virtio_blk: switch to using blk_queue_write_cache()
bcache: switch to using blk_queue_write_cache()
dm: switch to using blk_queue_write_cache()
xen-blkfront: switch to using blk_queue_write_cache()
ide-disk: update to using blk_queue_write_cache()
md: update to using blk_queue_write_cache()
mmc/block: switch to using blk_queue_write_cache()
mtd: switch to using blk_queue_write_cache()
um: switch to using blk_queue_write_cache()
block: kill blk_queue_flush()
NVMe: silence warning about unused 'dev'
block: kill off q->flush_flags

Keith Busch (3):
NVMe: Skip async events for degraded controllers
mtip32xx: Convert to use blk_mq_tagset_busy_iter
NVMe: Fix check_flush_dependency warning

Matias BjÃrling (15):
lightnvm: handle submit_io failure
lightnvm: implement nvm_submit_ppa_list
lightnvm: add fpg_size and pfpg_size to struct nvm_dev
lightnvm: move block fold outside of get_bb_tbl()
lightnvm: avoid memory leak when lun_map kcalloc fails
lightnvm: introduce nvm_for_each_lun_ppa() macro
lightnvm: refactor device ops->get_bb_tbl()
lightnvm: remove struct factory_blks
lightnvm: make nvm_set_rqd_ppalist() aware of vblks
lightnvm: move responsibility for bad blk mgmt to target
lightnvm: refactor set_bb_tbl for accepting ppa list
lightnvm: fix out of bound ppa lun id on bb tbl
lightnvm: remove mgt targets on mgt removal
lightnvm: expose gennvm_mark_blk to targets
lightnvm: add is_cached entry to struct ppa_addr

Ming Lin (7):
nvme: add missing lock nesting notation
nvme: add helper nvme_map_len()
nvme: rewrite discard support
nvme: add helper nvme_setup_cmd()
nvme: add helper nvme_cleanup_cmd()
nvme: switch to RCU freeing the namespace
nvme: fix nvme_ns_remove() deadlock

Sagi Grimberg (3):
nvme: Use blk-mq helper for IO termination
blk-mq: Make blk_mq_all_tag_busy_iter static
nvme/lightnvm: Log using the ctrl named device

Simon A. F. Lund (2):
lightnvm: rename nvm_targets to nvm_tgt_type
lightnvm: refactor dev->online_target to global nvm_targets

Wang Sheng-Hui (3):
NVMe: small typo in section BLK_DEV_NVME_SCSI of host/Kconfig
NVMe: nvme_core_exit() should do cleanup in the reverse order as nvme_core_init does
NVMe: correct comment for offset enum of controller registers in nvme.h

Wenwei Tao (2):
lightnvm: calculate rrpc total blocks and sectors up front
lightnvm: store rrpc->soffset in device sector size

Documentation/block/writeback_cache_control.txt | 4 +-
arch/um/drivers/ubd_kern.c | 2 +-
block/blk-core.c | 3 +-
block/blk-flush.c | 11 +-
block/blk-mq-tag.c | 5 +-
block/blk-settings.c | 38 +--
drivers/block/drbd/drbd_main.c | 2 +-
drivers/block/loop.c | 2 +-
drivers/block/mtip32xx/mtip32xx.c | 12 +-
drivers/block/nbd.c | 4 +-
drivers/block/osdblk.c | 2 +-
drivers/block/ps3disk.c | 2 +-
drivers/block/skd_main.c | 61 +---
drivers/block/virtio_blk.c | 6 +-
drivers/block/xen-blkback/xenbus.c | 2 +-
drivers/block/xen-blkfront.c | 3 +-
drivers/ide/ide-disk.c | 6 +-
drivers/lightnvm/core.c | 370 ++++++++++++++++--------
drivers/lightnvm/gennvm.c | 100 ++++---
drivers/lightnvm/rrpc.c | 42 ++-
drivers/lightnvm/rrpc.h | 2 +-
drivers/lightnvm/sysblk.c | 284 +++++++++---------
drivers/md/bcache/super.c | 2 +-
drivers/md/dm-table.c | 20 +-
drivers/md/md.c | 2 +-
drivers/md/raid5-cache.c | 3 +-
drivers/mmc/card/block.c | 2 +-
drivers/mtd/mtd_blkdevs.c | 2 +-
drivers/nvme/host/Kconfig | 2 +-
drivers/nvme/host/core.c | 272 +++++++++++++++--
drivers/nvme/host/lightnvm.c | 82 ++----
drivers/nvme/host/nvme.h | 91 ++----
drivers/nvme/host/pci.c | 273 +++++++----------
drivers/scsi/sd.c | 8 +-
drivers/target/target_core_iblock.c | 6 +-
include/linux/blk-mq.h | 2 -
include/linux/blkdev.h | 6 +-
include/linux/lightnvm.h | 48 ++-
include/linux/nvme.h | 4 +-
39 files changed, 982 insertions(+), 806 deletions(-)

commit ee11358854d12c28a17175ea966ca782a572e81a
Merge: 4f816cd13c1b 116f7d4a21fe
Author: Jens Axboe <axboe@xxxxxx>
Date: Tue May 17 09:22:13 2016 -0600

Merge branch 'for-4.7/drivers' into nvme-test

Signed-off-by: Jens Axboe <axboe@xxxxxx>

diff --cc drivers/nvme/host/pci.c
index 4fd733ff72b1,fb741d09831a..0f093f14d348
--- a/drivers/nvme/host/pci.c
+++ b/drivers/nvme/host/pci.c
@@@ -2086,15 -2014,13 +2014,12 @@@ static void nvme_remove(struct pci_dev
struct nvme_dev *dev = pci_get_drvdata(pdev);

- set_bit(NVME_CTRL_REMOVING, &dev->flags);
+ nvme_change_ctrl_state(&dev->ctrl, NVME_CTRL_DELETING);
pci_set_drvdata(pdev, NULL);
- flush_work(&dev->async_work);
- flush_work(&dev->scan_work);
- nvme_remove_namespaces(&dev->ctrl);
nvme_dev_disable(dev, true);
-- flush_work(&dev->reset_work);
nvme_free_queues(dev, 0);

Jens Axboe