tree e4ff797130937f7280b473fff3662a9699a09440
parent a4b48ba9047dfdf99cf2316d21baac2791b3b14c
author Russell Currey <ruscur@russell.cc> 1498029483 +1000
committer Michael Ellerman <mpe@ellerman.id.au> 1498529668 +1000

powerpc/powernv/pci: Add helper to check if a PE has a single vendor

Add a helper that determines if all the devices contained in a given PE
are all from the same vendor or not.  This can be useful in determining
if it's okay to make PE-wide changes that may be suitable for some
devices but not for others.

This is used later in the series.

Signed-off-by: Russell Currey <ruscur@russell.cc>
Signed-off-by: Michael Ellerman <mpe@ellerman.id.au>