powerpc/powernv/pci: Add pci_bus_to_pnvhb() helper

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Add a helper to go from a pci_bus structure to the pnv_phb that hosts
that bus. There's a lot of instances of the following pattern:

	struct pci_controller *hose = pci_bus_to_host(pdev->bus);
	struct pnv_phb *phb = hose->private_data;

Without any other uses of the pci_controller inside the function. This
is hard to read since it requires you to memorise the contents of the
private data fields and kind of error prone since it involves blindly
assigning a void pointer. Add a helper to make it more concise and
explicit.

Signed-off-by: Oliver O'Halloran <oohall@gmail.com>
Signed-off-by: Michael Ellerman <mpe@ellerman.id.au>
Link: https://lore.kernel.org/r/20200722065715.1432738-1-oohall@gmail.com

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Oliver O'Halloran 2020-07-22 16:57:00 +10:00 • committed by Michael Ellerman

parent a131bfc69b

commit 5609ffddd1

3 changed files with 38 additions and 74 deletions

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88

arch/powerpc/platforms/powernv/pci-ioda.c

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14

arch/powerpc/platforms/powernv/pci.c

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10

arch/powerpc/platforms/powernv/pci.h

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