| Message ID | 20170419135332.GA16404@bhelgaas-glaptop.roam.corp.google.com (mailing list archive) |
|---|---|
| State | New, archived |
| Delegated to: | Bjorn Helgaas |
| Headers | show |
On Wed, Apr 19, 2017 at 08:53:32AM -0500, Bjorn Helgaas wrote: > 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> I applied this to pci/enumeration for v4.12. > diff --git a/drivers/pci/access.c b/drivers/pci/access.c > index 1c8051003e67..9b09cd31158c 100644 > --- a/drivers/pci/access.c > +++ b/drivers/pci/access.c > @@ -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)
diff --git a/drivers/pci/access.c b/drivers/pci/access.c index 1c8051003e67..9b09cd31158c 100644 --- a/drivers/pci/access.c +++ b/drivers/pci/access.c @@ -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)
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>