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authorBjorn Helgaas <bhelgaas@google.com>2017-04-19 07:44:51 -0500
committerBjorn Helgaas <bhelgaas@google.com>2017-04-19 07:44:51 -0500
commit9b70ae4951746146838b474c3a90722666edf4c1 (patch)
treef258fee5780cff49f24d776c8602bad2a08afa88 /drivers/pci/access.c
parentdc5205ef46231e848562c9275933d7b359f515ba (diff)
downloadlinux-9b70ae4951746146838b474c3a90722666edf4c1.tar.bz2
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>
Diffstat (limited to 'drivers/pci/access.c')
-rw-r--r--drivers/pci/access.c3
1 files changed, 2 insertions, 1 deletions
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)