[PATCH v2] usb: xhci: only set D3hot for pci device

[Henry Lin <henryl@nvidia.com>]

Xhci driver cannot call pci_set_power_state() on non-pci xhci host
controllers. For example, NVIDIA Tegra XHCI host controller which acts
as platform device with XHCI_SPURIOUS_WAKEUP quirk set in some platform
hits this issue during shutdown.

Signed-off-by: Henry Lin <henryl@nvidia.com>
---
 drivers/usb/host/xhci.c | 7 +++++--
 1 file changed, 5 insertions(+), 2 deletions(-)

diff --git a/drivers/usb/host/xhci.c b/drivers/usb/host/xhci.c
index 6c17e3fe181a..61718b126d2b 100644
--- a/drivers/usb/host/xhci.c
+++ b/drivers/usb/host/xhci.c
@@ -791,8 +791,11 @@ static void xhci_shutdown(struct usb_hcd *hcd)
 			readl(&xhci->op_regs->status));
 
 	/* Yet another workaround for spurious wakeups at shutdown with HSW */
-	if (xhci->quirks & XHCI_SPURIOUS_WAKEUP)
-		pci_set_power_state(to_pci_dev(hcd->self.sysdev), PCI_D3hot);
+	if (xhci->quirks & XHCI_SPURIOUS_WAKEUP) {
+		if (dev_is_pci(hcd->self.sysdev))
+			pci_set_power_state(to_pci_dev(hcd->self.sysdev),
+					PCI_D3hot);
+	}
 }
 
 #ifdef CONFIG_PM
-- 
2.17.1