1 files changed, 21 insertions, 0 deletions

diff --git a/drivers/usb/host/ehci-pci.c b/drivers/usb/host/ehci-pci.c
index d43d176161aa..a307d550bdaf 100644
--- a/drivers/usb/host/ehci-pci.c
+++ b/drivers/usb/host/ehci-pci.c
@@ -361,6 +361,22 @@ static int ehci_pci_resume(struct usb_hcd *hcd, bool hibernated)
 }
 #endif
 
+static int ehci_update_device(struct usb_hcd *hcd, struct usb_device *udev)
+{
+        struct ehci_hcd *ehci = hcd_to_ehci(hcd);
+        int rc = 0;
+
+        if (!udev->parent) /* udev is root hub itself, impossible */
+                rc = -1;
+        /* we only support lpm device connected to root hub yet */
+        if (ehci->has_lpm && !udev->parent->parent) {
+                rc = ehci_lpm_set_da(ehci, udev->devnum, udev->portnum);
+                if (!rc)
+                        rc = ehci_lpm_check(ehci, udev->portnum);
+        }
+        return rc;
+}
+
 static const struct hc_driver ehci_pci_hc_driver = {
         .description =          hcd_name,
         .product_desc =         "EHCI Host Controller",
@@ -407,6 +423,11 @@ static const struct hc_driver ehci_pci_hc_driver = {
         .relinquish_port =      ehci_relinquish_port,
         .port_handed_over =     ehci_port_handed_over,
 
+        /*
+         * call back when device connected and addressed
+         */
+        .update_device =        ehci_update_device,
+
         .clear_tt_buffer_complete       = ehci_clear_tt_buffer_complete,
 };