Merge tag 'hyperv-fixes-signed' of git://git.kernel.org/pub/scm/linux/kernel/git...

Merge tag 'hyperv-fixes-signed' of git://git.kernel.org/pub/scm/linux/kernel/git/hyperv/linux into char-misc-linus

Sasha writes:

Three bug fixes for different parts of the hyper-v code:

 - Fix for a lockup when changing NIC's MTU from Dexuan.
 - Fix of use of uninitialized memory from Dexuan.
 - Fix for memory corruption caused by ballooning from Vitaly.

All 3 were tested internally.

* tag 'hyperv-fixes-signed' of git://git.kernel.org/pub/scm/linux/kernel/git/hyperv/linux:
  vmbus: fix subchannel removal
  hv_balloon: avoid touching uninitialized struct page during tail onlining
  Drivers: hv: vmbus: Check for ring when getting debug info