[PATCH 0/4 v3] Introduce device assignment flag operation helper function

[Ethan Zhao]

This patch set introduces three PCI device flag operation helper functions
when set pci device PF/VF to assigned or deassigned status also check it.
and patch 2,3,4 apply these helper functions to KVM,XEN and PCI.

v2: simplify unnecessory ternary operation in function pci_is_dev_assigned().
v3: amend helper function naming. 

Appreciate suggestion from
alex.williamson@xxxxxxxxxx,
david.vrabel@xxxxxxxxxx,
alexander.h.duyck@xxxxxxxxx


BR,
Ethan


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