Pull block fixes from Jens Axboe:
 "A smaller collection of fixes that should go into -rc1. This contains:

   - A fix from Christoph, fixing a regression with the WRITE_SAME and
     partial completions. Caused a BUG() on ppc.

   - Fixup for __blk_mq_stop_hw_queues(), it should be static. From
     Colin.

   - Removal of dmesg error messages on elevator switching, when invoked
     from sysfs. From me.

   - Fix for blk-stat, using this_cpu_ptr() in a section only protected
     by rcu_read_lock(). This breaks when PREEMPT_RCU is enabled. From
     me.

   - Two fixes for BFQ from Paolo, one fixing a crash and one updating
     the documentation.

   - An error handling lightnvm memory leak, from Rakesh.

   - The previous blk-mq hot unplug lock reversal depends on the CPU
     hotplug rework that isn't in mainline yet. This caused a lockdep
     splat when people unplugged CPUs with blk-mq devices. From Wanpeng.

   - A regression fix for DIF/DIX on blk-mq. From Wen"

* 'for-linus' of git://git.kernel.dk/linux-block:
  block: handle partial completions for special payload requests
  blk-mq: NVMe 512B/4K+T10 DIF/DIX format returns I/O error on dd with split op
  blk-stat: don't use this_cpu_ptr() in a preemptable section
  elevator: remove redundant warnings on IO scheduler switch
  block, bfq: stress that low_latency must be off to get max throughput
  block, bfq: use pointer entity->sched_data only if set
  nvme: lightnvm: fix memory leak
  blk-mq: make __blk_mq_stop_hw_queues static
  lightnvm: remove unused rq parameter of nvme_nvm_rqtocmd() to kill warning
  block/mq: fix potential deadlock during cpu hotplug

Free up kmalloc allocated memory if failure happens while handling L2P
table transfer in nvme_nvm_get_l2p_tbl.

Fixes: 8e79b5cb ("lightnvm: move block provisioning to targets")
Signed-off-by: Rakesh Pandit <rakesh@tuxera.com>
Reviewed-by: Javier González <javier@cnexlabs.com>
Signed-off-by: Jens Axboe <axboe@fb.com>

Pull PCI updates from Bjorn Helgaas:

 - add framework for supporting PCIe devices in Endpoint mode (Kishon
   Vijay Abraham I)

 - use non-postable PCI config space mappings when possible (Lorenzo
   Pieralisi)

 - clean up and unify mmap of PCI BARs (David Woodhouse)

 - export and unify Function Level Reset support (Christoph Hellwig)

 - avoid FLR for Intel 82579 NICs (Sasha Neftin)

 - add pci_request_irq() and pci_free_irq() helpers (Christoph Hellwig)

 - short-circuit config access failures for disconnected devices (Keith
   Busch)

 - remove D3 sleep delay when possible (Adrian Hunter)

 - freeze PME scan before suspending devices (Lukas Wunner)

 - stop disabling MSI/MSI-X in pci_device_shutdown() (Prarit Bhargava)

 - disable boot interrupt quirk for ASUS M2N-LR (Stefan Assmann)

 - add arch-specific alignment control to improve device passthrough by
   avoiding multiple BARs in a page (Yongji Xie)

 - add sysfs sriov_drivers_autoprobe to control VF driver binding
   (Bodong Wang)

 - allow slots below PCI-to-PCIe "reverse bridges" (Bjorn Helgaas)

 - fix crashes when unbinding host controllers that don't support
   removal (Brian Norris)

 - add driver for MicroSemi Switchtec management interface (Logan
   Gunthorpe)

 - add driver for Faraday Technology FTPCI100 host bridge (Linus
   Walleij)

 - add i.MX7D support (Andrey Smirnov)

 - use generic MSI support for Aardvark (Thomas Petazzoni)

 - make Rockchip driver modular (Brian Norris)

 - advertise 128-byte Read Completion Boundary support for Rockchip
   (Shawn Lin)

 - advertise PCI_EXP_LNKSTA_SLC for Rockchip root port (Shawn Lin)

 - convert atomic_t to refcount_t in HV driver (Elena Reshetova)

 - add CPU IRQ affinity in HV driver (K. Y. Srinivasan)

 - fix PCI bus removal in HV driver (Long Li)

 - add support for ThunderX2 DMA alias topology (Jayachandran C)

 - add ThunderX pass2.x 2nd node MCFG quirk (Tomasz Nowicki)

 - add ITE 8893 bridge DMA alias quirk (Jarod Wilson)

 - restrict Cavium ACS quirk only to CN81xx/CN83xx/CN88xx devices
   (Manish Jaggi)

* tag 'pci-v4.12-changes' of git://git.kernel.org/pub/scm/linux/kernel/git/helgaas/pci: (146 commits)
  PCI: Don't allow unbinding host controllers that aren't prepared
  ARM: DRA7: clockdomain: Change the CLKTRCTRL of CM_PCIE_CLKSTCTRL to SW_WKUP
  MAINTAINERS: Add PCI Endpoint maintainer
  Documentation: PCI: Add userguide for PCI endpoint test function
  tools: PCI: Add sample test script to invoke pcitest
  tools: PCI: Add a userspace tool to test PCI endpoint
  Documentation: misc-devices: Add Documentation for pci-endpoint-test driver
  misc: Add host side PCI driver for PCI test function device
  PCI: Add device IDs for DRA74x and DRA72x
  dt-bindings: PCI: dra7xx: Add DT bindings to enable unaligned access
  PCI: dwc: dra7xx: Workaround for errata id i870
  dt-bindings: PCI: dra7xx: Add DT bindings for PCI dra7xx EP mode
  PCI: dwc: dra7xx: Add EP mode support
  PCI: dwc: dra7xx: Facilitate wrapper and MSI interrupts to be enabled independently
  dt-bindings: PCI: Add DT bindings for PCI designware EP mode
  PCI: dwc: designware: Add EP mode support
  Documentation: PCI: Add binding documentation for pci-test endpoint function
  ixgbe: Use pcie_flr() instead of duplicating it
  IB/hfi1: Use pcie_flr() instead of duplicating it
  PCI: imx6: Fix spelling mistake: "contol" -> "control"
  ...

With gcc 4.1.2:

    drivers/nvme/host/lightnvm.c: In function ‘nvme_nvm_submit_io’:
    drivers/nvme/host/lightnvm.c:498: warning: ‘rq’ is used uninitialized in this function

Indeed, since commit 2e13f33a2464fc3a ("lightnvm: create cmd before
allocating request"), the request is passed to nvme_nvm_rqtocmd() before
it is allocated.

Fortunately, as of commit 91276162de9476b8 ("lightnvm: refactor end_io
functions for sync"), nvme_nvm_rqtocmd () no longer uses the passed
request, so this warning is a false positive.

Drop the unused parameter to clean up the code and kill the warning.

Fixes: 2e13f33a2464fc3a ("lightnvm: create cmd before allocating request")
Fixes: 91276162de9476b8 ("lightnvm: refactor end_io functions for sync")
Signed-off-by: Geert Uytterhoeven <geert@linux-m68k.org>
Signed-off-by: Jens Axboe <axboe@fb.com>

Create nvme command before allocating a request using
nvme_alloc_request, which uses the command direction. Up until now, the
command has been zeroized, so all commands have been allocated as a
read operation.

Signed-off-by: Javier González <javier@cnexlabs.com>
Reviewed-by: Matias Bjørling <matias@cnexlabs.com>
Reviewed-by: Christoph Hellwig <hch@lst.de>
Signed-off-by: Jens Axboe <axboe@fb.com>

Remove the request_idx parameter, which can't be used safely now that we
support I/O schedulers with blk-mq.  Except for a superflous check in
mtip32xx it was unused anyway.

Also pass the tag_set instead of just the driver data - this allows drivers
to avoid some code duplication in a follow on cleanup.

Signed-off-by: Christoph Hellwig <hch@lst.de>
Signed-off-by: Jens Axboe <axboe@fb.com>

Christoph writes:

"A couple more updates for 4.12.  The biggest pile is fc and lpfc
 updates from James, but there are various small fixes and cleanups as
 well."

Fixes up a few merge issues, and also a warning in
lpfc_nvmet_rcv_unsol_abort() if CONFIG_NVME_TARGET_FC isn't enabled.

Signed-off-by: Jens Axboe <axboe@fb.com>

This function just returns the same error code and sense data as
the default statement in the switch in the caller.

Signed-off-by: Christoph Hellwig <hch@lst.de>
Reviewed-by: Keith Busch <keith.busch@intel.com>

Found by sparse.

Signed-off-by: Christoph Hellwig <hch@lst.de>
Reviewed-by: Matias Bjørling <matias@cnexlabs.com>

The current command submission code uses a sector-based value when
considering the maximum number of blocks per command. With a
4k-formatted namespace and a command exceeding max hardware limits, this
calculation doesn't split IOs which should be split and fails in the
nvme layer. This patch fixes that calculation and enables IO splitting
in these circumstances.

Signed-off-by: Jon Derrick <jonathan.derrick@intel.com>
Reviewed-by: Jens Axboe <axboe@fb.com>
Signed-off-by: Christoph Hellwig <hch@lst.de>