[PATCH] OHCI PM updates

This simplifies the OHCI root hub suspend logic:

 - Uses new usbcore root hub calls to make autosuspend work again:
	* Uses a newish usbcore root hub wakeup mechanism,
	  making requests to khubd not keventd.
	* Uses an even newer sibling suspend hook.

 - Expect someone always made usbcore call ohci_hub_suspend() before bus
   glue fires; and that ohci_hub_resume() is only called after that bus
   glue ran.  Previously, only CONFIG_USB_SUSPEND promised those things.
   (Includes updates to PCI and OMAP bus glue.)

 - Handle a not-noticed-before special case during resume from one of
   the swsusp snapshots when using "usb-handoff":  the controller isn't
   left in RESET state.  (A bug to fix in the usb-handoff code...)

Also cleans up a minor debug printk glitch, and switches an mdelay over
to an msleep (how did that stick around for so long?).

Signed-off-by: David Brownell <dbrownell@users.sourceforge.net>
Signed-off-by: Greg Kroah-Hartman <gregkh@suse.de>

 drivers/usb/host/ohci-dbg.c  |    4 ----
 drivers/usb/host/ohci-hcd.c  |    2 +-
 drivers/usb/host/ohci-hub.c  |   42 ++++++++++++------------------------------
 drivers/usb/host/ohci-mem.c  |    1 -
 drivers/usb/host/ohci-omap.c |   36 ++++++++++++------------------------
 drivers/usb/host/ohci-pci.c  |   40 ++++++++--------------------------------
 drivers/usb/host/ohci.h      |    1 -
 7 files changed, 33 insertions(+), 93 deletions(-)

1 files changed, 8 insertions, 32 deletions

diff --git a/drivers/usb/host/ohci-pci.c b/drivers/usb/host/ohci-pci.c
index 0afa237b02ad..99a0ad41aec5 100644
--- a/drivers/usb/host/ohci-pci.c
+++ b/drivers/usb/host/ohci-pci.c
@@ -112,23 +112,13 @@ ohci_pci_start (struct usb_hcd *hcd)
 
 static int ohci_pci_suspend (struct usb_hcd *hcd, pm_message_t message)
 {
-        struct ohci_hcd         *ohci = hcd_to_ohci (hcd);
-
-        /* suspend root hub, hoping it keeps power during suspend */
-        if (time_before (jiffies, ohci->next_statechange))
-                msleep (100);
-
-#ifdef  CONFIG_USB_SUSPEND
-        (void) usb_suspend_device (hcd->self.root_hub);
-#else
-        usb_lock_device (hcd->self.root_hub);
-        (void) ohci_hub_suspend (hcd);
-        usb_unlock_device (hcd->self.root_hub);
-#endif
+        /* root hub was already suspended */
 
-        /* let things settle down a bit */
-        msleep (100);
-        
+        /* FIXME these PMAC things get called in the wrong places.  ASIC
+         * clocks should be turned off AFTER entering D3, and on BEFORE
+         * trying to enter D0.  Evidently the PCI layer doesn't currently
+         * provide the right sort of platform hooks for this ...
+         */
 #ifdef CONFIG_PPC_PMAC
         if (_machine == _MACH_Pmac) {
                 struct device_node      *of_node;
@@ -145,9 +135,6 @@ static int ohci_pci_suspend (struct usb_hcd *hcd, pm_message_t message)
 
 static int ohci_pci_resume (struct usb_hcd *hcd)
 {
-        struct ohci_hcd         *ohci = hcd_to_ohci (hcd);
-        int                     retval = 0;
-
 #ifdef CONFIG_PPC_PMAC
         if (_machine == _MACH_Pmac) {
                 struct device_node *of_node;
@@ -159,19 +146,8 @@ static int ohci_pci_resume (struct usb_hcd *hcd)
         }
 #endif /* CONFIG_PPC_PMAC */
 
-        /* resume root hub */
-        if (time_before (jiffies, ohci->next_statechange))
-                msleep (100);
-#ifdef  CONFIG_USB_SUSPEND
-        /* get extra cleanup even if remote wakeup isn't in use */
-        retval = usb_resume_device (hcd->self.root_hub);
-#else
-        usb_lock_device (hcd->self.root_hub);
-        retval = ohci_hub_resume (hcd);
-        usb_unlock_device (hcd->self.root_hub);
-#endif
-
-        return retval;
+        usb_hcd_resume_root_hub(hcd);
+        return 0;
 }
 
 #endif  /* CONFIG_PM */