usb/acpi: binding xhci root hub usb port with ACPI

This patch is to bind xhci root hub usb port with its acpi node.
The port num in the acpi table matches with the sequence in the xhci
extended capabilities table. So call usb_hcd_find_raw_port_number() to
transfer hub port num into raw port number which associates with
the sequence in the xhci extended capabilities table before binding.

Signed-off-by: Lan Tianyu <tianyu.lan@intel.com>
Signed-off-by: Sarah Sharp <sarah.a.sharp@linux.intel.com>

diff --git a/drivers/usb/core/usb-acpi.c b/drivers/usb/core/usb-acpi.c
index b6f4bad3f756eefb173097767ffde6970e06220e..255c14464bf2ea7a30dffab6fa1770c7b030c0aa 100644 (file)
--- a/drivers/usb/core/usb-acpi.c
+++ b/drivers/usb/core/usb-acpi.c
@@ -15,6 +15,7 @@
 #include <linux/kernel.h>
 #include <linux/acpi.h>
 #include <linux/pci.h>
+#include <linux/usb/hcd.h>
 #include <acpi/acpi_bus.h>
 
 #include "usb.h"
@@ -188,8 +189,13 @@ static int usb_acpi_find_device(struct device *dev, acpi_handle *handle)
                 * connected to.
                 */
                if (!udev->parent) {
-                       *handle = acpi_get_child(DEVICE_ACPI_HANDLE(&udev->dev),
+                       struct usb_hcd *hcd = bus_to_hcd(udev->bus);
+                       int raw_port_num;
+
+                       raw_port_num = usb_hcd_find_raw_port_number(hcd,
                                port_num);
+                       *handle = acpi_get_child(DEVICE_ACPI_HANDLE(&udev->dev),
+                               raw_port_num);
                        if (!*handle)
                                return -ENODEV;
                } else {