PCI: Simplify MPS test for Downstream Port

PCIe hotplug bridges are always either Root Ports or Downstream Ports.  No
other device type can have a PCIe link leading downstream to a slot.

Root Ports don't have an upstream bridge, so "dev->is_hotplug_bridge &&
dev->bus->self" is true if and only if "dev" is a Downstream Port.  That
means we can simplify this by looking at the type of "dev" itself, without
looking upstream at all.

No functional change.

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

1 files changed, 1 insertions, 2 deletions

diff --git a/drivers/pci/probe.c b/drivers/pci/probe.c
index ecae7f290647..0591b087a6c3 100644
--- a/drivers/pci/probe.c
+++ b/drivers/pci/probe.c
@@ -1507,8 +1507,7 @@ static int pcie_find_smpss(struct pci_dev *dev, void *data)
          * will occur as normal.
          */
         if (dev->is_hotplug_bridge && (!list_is_singular(&dev->bus->devices) ||
-             (dev->bus->self &&
-              pci_pcie_type(dev->bus->self) != PCI_EXP_TYPE_ROOT_PORT)))
+            pci_pcie_type(dev) != PCI_EXP_TYPE_ROOT_PORT))
                 *smpss = 0;
 
         if (*smpss > dev->pcie_mpss)