[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, 5 insertions, 1 deletions

diff --git a/drivers/usb/host/uhci-hcd.c b/drivers/usb/host/uhci-hcd.c
index 1c0394cb3c89..071fab6b6475 100644
--- a/drivers/usb/host/uhci-hcd.c
+++ b/drivers/usb/host/uhci-hcd.c
@@ -748,8 +748,12 @@ static int uhci_resume(struct usb_hcd *hcd)
         check_and_reset_hc(uhci);
         configure_hc(uhci);
 
-        if (uhci->rh_state == UHCI_RH_RESET)
+        if (uhci->rh_state == UHCI_RH_RESET) {
+
+                /* The controller had to be reset */
+                usb_root_hub_lost_power(hcd->self.root_hub);
                 suspend_rh(uhci, UHCI_RH_SUSPENDED);
+        }
 
         spin_unlock_irq(&uhci->lock);