linux-kernel - [PATCH] usb: xhci: only set D3hot for pci device

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Date:   Tue, 12 Nov 2019 15:18:30 +0800
From:   Henry Lin <henryl@...dia.com>
To:     unlisted-recipients:; (no To-header on input)
CC:     Henry Lin <henryl@...dia.com>,
        Mathias Nyman <mathias.nyman@...el.com>,
        Greg Kroah-Hartman <gregkh@...uxfoundation.org>,
        <linux-usb@...r.kernel.org>, <linux-kernel@...r.kernel.org>
Subject: [PATCH] usb: xhci: only set D3hot for pci device

xhci driver cannot call pci_set_power_state() on non-pci xhci host
controllers.

Signed-off-by: Henry Lin <henryl@...dia.com>
---
 drivers/usb/host/xhci.c | 10 ++++++++--
 1 file changed, 8 insertions(+), 2 deletions(-)

diff --git a/drivers/usb/host/xhci.c b/drivers/usb/host/xhci.c
index 6c17e3fe181a..1fc16763dcda 100644
--- a/drivers/usb/host/xhci.c
+++ b/drivers/usb/host/xhci.c
@@ -761,6 +761,8 @@ static void xhci_stop(struct usb_hcd *hcd)
 	mutex_unlock(&xhci->mutex);
 }
 
+extern struct device_type pci_dev_type;
+
 /*
  * Shutdown HC (not bus-specific)
  *
@@ -791,8 +793,12 @@ 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) {
+		struct device *dev = hcd->self.sysdev;
+
+		if (dev->type == &pci_dev_type)
+			pci_set_power_state(to_pci_dev(dev), PCI_D3hot);
+	}
 }
 
 #ifdef CONFIG_PM
-- 
2.17.1