[PATCH 2/2] pci: mark USB4 devices as "is_thunderbolt"

Mario Limonciello
2022-02-04T18:29:12Z

Downstream drivers use this information to declare functional
differences in how the drivers performed by knowing that they are
connected to an upstream TBT/USB4 port.

Signed-off-by: Mario Limonciello <mario.limonciello@amd.com>
---
drivers/pci/probe.c | 4 ++--
1 file changed, 2 insertions(+), 2 deletions(-)

diff --git a/drivers/pci/probe.c b/drivers/pci/probe.c
index 17a969942d37..b59f6c05e606 100644
--- a/drivers/pci/probe.c
+++ b/drivers/pci/probe.c
@@ -1581,9 +1581,9 @@ static void set_pcie_thunderbolt(struct pci_dev *dev)
{
u16 vsec;

- /* Is the device part of a Thunderbolt controller? */
+ /* Is the device part of a Thunderbolt or USB4 controller? */
vsec = pci_find_vsec_capability(dev, PCI_VENDOR_ID_INTEL, PCI_VSEC_ID_INTEL_TBT);
- if (vsec)
+ if (vsec || dev->class == PCI_CLASS_SERIAL_USB_USB4)
dev->is_thunderbolt = 1;
}

--
2.34.1