Merge branch 'mlx4-fixes'

Tariq Toukan says:

====================
mlx4_core misc fixes

This patchset by Jack contains misc fixes to the mlx4 Core driver.

Patch 1 fixes a use-after-free situation by marking (nullifying) the pointer,
  please queue for -stable >= v4.0.
Patch 2 adds a missing lock acquire and release in SRIOV command interface,
  please queue for -stable >= v4.9.
Patch 3 avoids calling roundup_pow_of_two when argument is zero,
  please queue for -stable >= v3.3.

Series generated against net commit:
a3b1933d34d5 Merge tag 'mlx5-fixes-2019-03-11' of
git://git.kernel.org/pub/scm/linux/kernel/git/saeed/linux
====================

Signed-off-by: David S. Miller <davem@davemloft.net>