Sony VAIO t-series machines are not capable of switching usb2 ports over
from Intel EHCI to xHCI controller. If tried the USB2 port will be left
unconnected
and unusable.
Signed-off-by: Mathias Nyman <mathias.ny...@linux.intel.com>
---
drivers/usb/host/pci-quirks.c | 7 +++++++
1 file changed, 7 insertions(+)
diff --git a/drivers/usb/host/pci-quirks.c b/drivers/usb/host/pci-quirks.c
index 00661d3..4a6d3dd 100644
--- a/drivers/usb/host/pci-quirks.c
+++ b/drivers/usb/host/pci-quirks.c
@@ -847,6 +847,13 @@ void usb_enable_intel_xhci_ports(struct pci_dev *xhci_pdev)
bool ehci_found = false;
struct pci_dev *companion = NULL;
+ /* Sony VAIO t-series with subsystem device ID 90a8 is not capable of
+ * switching ports from EHCI to xHCI
+ */
+ if (xhci_pdev->subsystem_vendor == PCI_VENDOR_ID_SONY &&
+ xhci_pdev->subsystem_device == 0x90a8)
+ return;
+
/* make sure an intel EHCI controller exists */
for_each_pci_dev(companion) {
if (companion->class == PCI_CLASS_SERIAL_USB_EHCI &&
--
1.8.3.2
--
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