[PATCH net 0/3] vhost fixes for 3.14, -stable

This fixes a deadlock with vhost reported in the field,
as well as a theoretical race issue found by code
review.

Patches 1+2 are needed for stable.

Thanks to Qin Chuanyu for reporting the issue!

Michael S. Tsirkin (3):
  kref: add kref_sub_return
  vhost: fix ref cnt checking deadlock
  vhost: fix a theoretical race in device cleanup

 include/linux/kref.h | 33 ++++++++++++++++++++++++++++++++-
 drivers/vhost/net.c  | 15 ++++++++++-----
 2 files changed, 42 insertions(+), 6 deletions(-)

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MST