From: Bjorn Helgaas Date: Wed, 19 Apr 2017 12:44:51 +0000 (-0500) Subject: PCI: Include PCI-to-PCIe bridges as "Downstream Ports" X-Git-Url: https://git.stricted.de/?a=commitdiff_plain;h=9b70ae4951746146838b474c3a90722666edf4c1;p=GitHub%2Fmoto-9609%2Fandroid_kernel_motorola_exynos9610.git 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 --- 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)