[GIT PULL] io_uring fixes for 5.5-rc7

[Jens Axboe]

Hi Linus,

A set of fixes that should go into this release. This pull request
contains:

- Ensure ->result is always set when IO is retried (Bijan)

- In conjunction with the above, fix a regression in polled IO issue
  when retried (me/Bijan)

- Don't setup async context for read/write fixed, otherwise we may
  wrongly map the iovec on retry (me)

- Cancel io-wq work if we fail getting mm reference (me)

- Ensure dependent work is always initialized correctly (me)

- Only allow original task to submit IO, don't allow it from a passed
  ring fd (me)

Please pull!


  git://git.kernel.dk/linux-block.git tags/io_uring-5.5-2020-01-16


----------------------------------------------------------------
Bijan Mottahedeh (1):
      io_uring: clear req->result always before issuing a read/write request

Jens Axboe (5):
      io_uring: don't setup async context for read/write fixed
      io-wq: cancel work if we fail getting a mm reference
      io_uring: be consistent in assigning next work from handler
      io_uring: ensure workqueue offload grabs ring mutex for poll list
      io_uring: only allow submit from owning task

 fs/io-wq.c    | 12 ++++++----
 fs/io_uring.c | 72 +++++++++++++++++++++++++++++++++++++++--------------------
 2 files changed, 56 insertions(+), 28 deletions(-)

-- 
Jens Axboe