usb: hub: add check for unsupported bus topology

[mirror_ubuntu-artful-kernel.git] / drivers / usb / core / hcd.h

diff --git a/drivers/usb/core/hcd.h b/drivers/usb/core/hcd.h
index a0bf5df6cb6fa3eb77636bd32f49c702822794ab..5b0b59b0d89b37709da23af08cf0271c193d9ebf 100644 (file)
--- a/drivers/usb/core/hcd.h
+++ b/drivers/usb/core/hcd.h
@@ -21,6 +21,8 @@
 
 #include <linux/rwsem.h>
 
+#define MAX_TOPO_LEVEL         6
+
 /* This file contains declarations of usbcore internals that are mostly
  * used or exposed by Host Controller Drivers.
  */
@@ -210,6 +212,8 @@ struct hc_driver {
        int     (*bus_suspend)(struct usb_hcd *);
        int     (*bus_resume)(struct usb_hcd *);
        int     (*start_port_reset)(struct usb_hcd *, unsigned port_num);
+       void    (*hub_irq_enable)(struct usb_hcd *);
+               /* Needed only if port-change IRQs are level-triggered */
 
                /* force handover of high-speed port to full-speed companion */
        void    (*relinquish_port)(struct usb_hcd *, int);
@@ -233,7 +237,7 @@ extern void usb_hcd_disable_endpoint(struct usb_device *udev,
 extern int usb_hcd_get_frame_number(struct usb_device *udev);
 
 extern struct usb_hcd *usb_create_hcd(const struct hc_driver *driver,
-               struct device *dev, char *bus_name);
+               struct device *dev, const char *bus_name);
 extern struct usb_hcd *usb_get_hcd(struct usb_hcd *hcd);
 extern void usb_put_hcd(struct usb_hcd *hcd);
 extern int usb_add_hcd(struct usb_hcd *hcd,