USB: EHCI, OHCI: handover changes

This patch (as887) changes the way ehci-hcd and ohci-hcd handle a loss
of VBUS power during suspend.  In order for the USB-persist facility
to work correctly, it is necessary for low- and full-speed devices
attached to a high-speed port to be handed back to the companion
controller during resume processing.

This entails three changes: adding code to ehci-hcd to perform the
handover, removing code from ohci-hcd to turn off ports during
root-hub reinit, and adding code to ohci-hcd to turn on ports during
PCI controller resume.  (Other bus glue resume methods for platforms
supporting high-speed controllers would need a similar change, if any
existed.)

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

1 files changed, 3 insertions, 0 deletions

diff --git a/drivers/usb/host/ehci.h b/drivers/usb/host/ehci.h
index 6ef9d775775b..4d617108f552 100644
--- a/drivers/usb/host/ehci.h
+++ b/drivers/usb/host/ehci.h
@@ -96,11 +96,14 @@ struct ehci_hcd {			/* one per controller */
 
         /* per root hub port */
         unsigned long           reset_done [EHCI_MAX_ROOT_PORTS];
+
         /* bit vectors (one bit per port) */
         unsigned long           bus_suspended;          /* which ports were
                         already suspended at the start of a bus suspend */
         unsigned long           companion_ports;        /* which ports are
                         dedicated to the companion controller */
+        unsigned long           owned_ports;            /* which ports are
+                        owned by the companion during a bus suspend */
 
         /* per-HC memory pools (could be per-bus, but ...) */
         struct dma_pool         *qh_pool;       /* qh per active urb */