[PATCH] USB: central handling for host controllers that were reset during suspend/resume

This patch (as515b) adds a routine to usbcore to simplify handling of
host controllers that lost power or were reset during suspend/resume.
The new core routine marks all the child devices of the root hub as
NOTATTACHED and tells khubd to disconnect the device structures as soon
as possible.

Signed-off-by: Alan Stern <stern@rowland.harvard.edu>
Signed-off-by: Greg Kroah-Hartman <gregkh@suse.de>

1 files changed, 1 insertions, 8 deletions

diff --git a/drivers/usb/host/ehci-pci.c b/drivers/usb/host/ehci-pci.c
index ac088bc72f1c..08ca0f849dab 100644
--- a/drivers/usb/host/ehci-pci.c
+++ b/drivers/usb/host/ehci-pci.c
@@ -278,7 +278,6 @@ static int ehci_pci_resume(struct usb_hcd *hcd)
 {
         struct ehci_hcd         *ehci = hcd_to_ehci(hcd);
         unsigned                port;
-        struct usb_device       *root = hcd->self.root_hub;
         struct pci_dev          *pdev = to_pci_dev(hcd->self.controller);
         int                     retval = -EINVAL;
 
@@ -312,13 +311,7 @@ static int ehci_pci_resume(struct usb_hcd *hcd)
 
 restart:
         ehci_dbg(ehci, "lost power, restarting\n");
-        for (port = HCS_N_PORTS(ehci->hcs_params); port > 0; ) {
-                port--;
-                if (!root->children [port])
-                        continue;
-                usb_set_device_state(root->children[port],
-                                        USB_STATE_NOTATTACHED);
-        }
+        usb_root_hub_lost_power(hcd->self.root_hub);
 
         /* Else reset, to cope with power loss or flush-to-storage
          * style "resume" having let BIOS kick in during reboot.