Block fixes for 4.6-rc

Hi Linus,

A few fixes for the current series. This pull request contains:

- Two fixes for NVMe. One fixes a reset race that can be triggered by repeated insert/removal of the module. The other fixes an issue on some platforms, where we get probe timeouts since legacy interrupts isn't working. This used not to be a problem since we had the worker thread poll for completions, but since that was killed off, it means those poor souls can't successfully probe their NVMe device. Use a proper IRQ check and probe (msi-x -> msi ->legacy), like most other drivers to work around this. Both from Keith.

- A loop corruption issue with offset in iters, from Ming Lei.

- A fix for not having the partition stat per cpu ref count initialized before sending out the KOBJ_ADD, which could cause user space to access the counter prior to initialization. Also from Ming Lei.

- A fix for using the wrong congestion state, from Kaixu Xia.

Please pull!

git://git.kernel.dk/linux-block.git for-linus

----------------------------------------------------------------
Kaixu Xia (1):
writeback: fix the wrong congested state variable definition

Keith Busch (2):
NVMe: Fix reset/remove race
NVMe: Always use MSI/MSI-x interrupts

Ming Lei (2):
block: partition: initialize percpuref before sending out KOBJ_ADD
block: loop: fix filesystem corruption in case of aio/dio

 block/partition-generic.c | 13 ++++++++++---
 drivers/block/loop.c      |  6 ++++++
 drivers/nvme/host/pci.c   | 31 +++++++++++++++++++------------
 mm/backing-dev.c          |  4 ++--
 4 files changed, 37 insertions(+), 17 deletions(-)

Jens Axboe