usb: move struct usb_device->children to struct usb_hub_port->child

Move child's pointer to the struct usb_hub_port since the child device
is directly associated with the port. Provide usb_get_hub_child_device()
to get child's pointer.

Signed-off-by: Lan Tianyu <tianyu.lan@intel.com>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>

1 files changed, 2 insertions, 1 deletions

diff --git a/drivers/usb/host/r8a66597-hcd.c b/drivers/usb/host/r8a66597-hcd.c
index c868be65e76..4c82fdf5494 100644
--- a/drivers/usb/host/r8a66597-hcd.c
+++ b/drivers/usb/host/r8a66597-hcd.c
@@ -2040,7 +2040,8 @@ static void collect_usb_address_map(struct usb_device *udev, unsigned long *map)
                 map[udev->devnum/32] |= (1 << (udev->devnum % 32));
 
         for (chix = 0; chix < udev->maxchild; chix++) {
-                struct usb_device *childdev = udev->children[chix];
+                struct usb_device *childdev =
+                        usb_get_hub_child_device(udev, chix + 1);
 
                 if (childdev)
                         collect_usb_address_map(childdev, map);