Merge branch 'uek4/xsa157' of git://ca-git.us.oracle.com/linux-konrad-public into...

Merge branch 'uek4/xsa157' of git://ca-git.us.oracle.com/linux-konrad-public into topic/uek-4.1/xen

* 'uek4/xsa157' of git://ca-git.us.oracle.com/linux-konrad-public:
  xen/pciback: Don't allow MSI-X ops if PCI_COMMAND_MEMORY is not set.
  xen/pciback: For XEN_PCI_OP_disable_msi[|x] only disable if device has MSI(X) enabled.
  xen/pciback: Do not install an IRQ handler for MSI interrupts.
  xen/pciback: Return error on XEN_PCI_OP_enable_msix when device has MSI or MSI-X enabled
  xen/pciback: Return error on XEN_PCI_OP_enable_msi when device has MSI or MSI-X enabled