Commit c8ceacc2 authored May 03, 2016 by Gavin Shan Committed by Michael Ellerman May 11, 2016

powerpc/powernv: Exclude root bus in pnv_pci_reset_secondary_bus()



The function pnv_pci_reset_secondary_bus() is called like below.
It's impossible for call the function on root bus. So it's safe
to remove the root bus case in the function. No functional changes
introduced.

   pci_parent_bus_reset() / pci_bus_reset() / pci_try_reset_bus()
   pci_reset_bridge_secondary_bus()
   pcibios_reset_secondary_bus()
   pnv_pci_reset_secondary_bus()

Signed-off-by: Gavin Shan <gwshan@linux.vnet.ibm.com>
Reviewed-by: Daniel Axtens <dja@axtens.net>
Reviewed-by: Alexey Kardashevskiy <aik@ozlabs.ru>
Signed-off-by: Michael Ellerman <mpe@ellerman.id.au>

parent 4fad4943

arch/powerpc/platforms/powernv/eeh-powernv.c

+2 −10

Original line number	Diff line number	Diff line
		@@ -868,17 +868,9 @@ static int pnv_eeh_bridge_reset(struct pci_dev *dev, int option)

		void pnv_pci_reset_secondary_bus(struct pci_dev *dev)
		{
		struct pci_controller *hose;

		if (pci_is_root_bus(dev->bus)) {
		hose = pci_bus_to_host(dev->bus);
		pnv_eeh_root_reset(hose, EEH_RESET_HOT);
		pnv_eeh_root_reset(hose, EEH_RESET_DEACTIVATE);
		} else {
		pnv_eeh_bridge_reset(dev, EEH_RESET_HOT);
		pnv_eeh_bridge_reset(dev, EEH_RESET_DEACTIVATE);
		}
		}

		static void pnv_eeh_wait_for_pending(struct pci_dn pdn, const char type,
		int pos, u16 mask)