Commit 9b70ae49 authored Apr 19, 2017 by Bjorn Helgaas

PCI: Include PCI-to-PCIe bridges as "Downstream Ports"



A PCI/PCI-X to PCI Express bridge, sometimes referred to as a "reverse
bridge", is a bridge with conventional PCI or PCI-X on its primary side and
a PCI Express Port on its secondary (downstream) side.

That PCIe Port is a Downstream Port and could be connected to a slot, just
like a Root Port or a Switch Downstream Port.  Make pcie_downstream_port()
return true for them, so we can access the Slot registers in the PCIe
capability.

Signed-off-by: Bjorn Helgaas <bhelgaas@google.com>

parent dc5205ef

drivers/pci/access.c

+2 −1

Original line number	Diff line number	Diff line
		@@ -700,7 +700,8 @@ static bool pcie_downstream_port(const struct pci_dev *dev)
		int type = pci_pcie_type(dev);

		return type == PCI_EXP_TYPE_ROOT_PORT \|\|
		type == PCI_EXP_TYPE_DOWNSTREAM;
		type == PCI_EXP_TYPE_DOWNSTREAM \|\|
		type == PCI_EXP_TYPE_PCIE_BRIDGE;
		}

		bool pcie_cap_has_lnkctl(const struct pci_dev *dev)

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