usbcore: move code among source files

This revised patch (as713b) moves a few routines among source files in
usbcore.  Some driver-related code in usb.c (claiming interfaces and
matching IDs) is moved to driver.c, where it belongs.  Also the
usb_generic stuff in driver.c is moved to a new source file: generic.c.
(That's the reason for revising the patch.)  Although not very big now,
it will get bigger in a later patch.

None of the code has been changed; it has only been re-arranged.


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

5 files changed, 370 insertions, 342 deletions

diff --git a/drivers/usb/core/Makefile b/drivers/usb/core/Makefile
index ec510922af6..34e9bac319b 100644
--- a/drivers/usb/core/Makefile
+++ b/drivers/usb/core/Makefile
@@ -4,7 +4,7 @@
 
 usbcore-objs    := usb.o hub.o hcd.o urb.o message.o driver.o \
                         config.o file.o buffer.o sysfs.o endpoint.o \
-                        devio.o notify.o
+                        devio.o notify.o generic.o
 
 ifeq ($(CONFIG_PCI),y)
         usbcore-objs    += hcd-pci.o
diff --git a/drivers/usb/core/driver.c b/drivers/usb/core/driver.c
index ec890650141..8dcf2cd0c56 100644
--- a/drivers/usb/core/driver.c
+++ b/drivers/usb/core/driver.c
@@ -17,7 +17,8 @@
  *
  * NOTE! This is not actually a driver at all, rather this is
  * just a collection of helper routines that implement the
- * generic USB things that the real drivers can use..
+ * matching, probing, releasing, suspending and resuming for
+ * real drivers.
  *
  */
 
@@ -34,38 +35,6 @@ struct usb_dynid {
         struct usb_device_id id;
 };
 
-
-static int generic_probe(struct device *dev)
-{
-        return 0;
-}
-static int generic_remove(struct device *dev)
-{
-        struct usb_device *udev = to_usb_device(dev);
-
-        /* if this is only an unbind, not a physical disconnect, then
-         * unconfigure the device */
-        if (udev->state == USB_STATE_CONFIGURED)
-                usb_set_configuration(udev, 0);
-
-        /* in case the call failed or the device was suspended */
-        if (udev->state >= USB_STATE_CONFIGURED)
-                usb_disable_device(udev, 0);
-        return 0;
-}
-
-struct device_driver usb_generic_driver = {
-        .owner = THIS_MODULE,
-        .name = "usb",
-        .bus = &usb_bus_type,
-        .probe = generic_probe,
-        .remove = generic_remove,
-};
-
-/* Fun hack to determine if the struct device is a
- * usb device or a usb interface. */
-int usb_generic_driver_data;
-
 #ifdef CONFIG_HOTPLUG
 
 /*
@@ -238,6 +207,89 @@ static int usb_unbind_interface(struct device *dev)
         return 0;
 }
 
+/**
+ * usb_driver_claim_interface - bind a driver to an interface
+ * @driver: the driver to be bound
+ * @iface: the interface to which it will be bound; must be in the
+ *      usb device's active configuration
+ * @priv: driver data associated with that interface
+ *
+ * This is used by usb device drivers that need to claim more than one
+ * interface on a device when probing (audio and acm are current examples).
+ * No device driver should directly modify internal usb_interface or
+ * usb_device structure members.
+ *
+ * Few drivers should need to use this routine, since the most natural
+ * way to bind to an interface is to return the private data from
+ * the driver's probe() method.
+ *
+ * Callers must own the device lock and the driver model's usb_bus_type.subsys
+ * writelock.  So driver probe() entries don't need extra locking,
+ * but other call contexts may need to explicitly claim those locks.
+ */
+int usb_driver_claim_interface(struct usb_driver *driver,
+                                struct usb_interface *iface, void* priv)
+{
+        struct device *dev = &iface->dev;
+
+        if (dev->driver)
+                return -EBUSY;
+
+        dev->driver = &driver->driver;
+        usb_set_intfdata(iface, priv);
+        iface->condition = USB_INTERFACE_BOUND;
+        mark_active(iface);
+
+        /* if interface was already added, bind now; else let
+         * the future device_add() bind it, bypassing probe()
+         */
+        if (device_is_registered(dev))
+                device_bind_driver(dev);
+
+        return 0;
+}
+EXPORT_SYMBOL(usb_driver_claim_interface);
+
+/**
+ * usb_driver_release_interface - unbind a driver from an interface
+ * @driver: the driver to be unbound
+ * @iface: the interface from which it will be unbound
+ *
+ * This can be used by drivers to release an interface without waiting
+ * for their disconnect() methods to be called.  In typical cases this
+ * also causes the driver disconnect() method to be called.
+ *
+ * This call is synchronous, and may not be used in an interrupt context.
+ * Callers must own the device lock and the driver model's usb_bus_type.subsys
+ * writelock.  So driver disconnect() entries don't need extra locking,
+ * but other call contexts may need to explicitly claim those locks.
+ */
+void usb_driver_release_interface(struct usb_driver *driver,
+                                        struct usb_interface *iface)
+{
+        struct device *dev = &iface->dev;
+
+        /* this should never happen, don't release something that's not ours */
+        if (!dev->driver || dev->driver != &driver->driver)
+                return;
+
+        /* don't release from within disconnect() */
+        if (iface->condition != USB_INTERFACE_BOUND)
+                return;
+
+        /* don't release if the interface hasn't been added yet */
+        if (device_is_registered(dev)) {
+                iface->condition = USB_INTERFACE_UNBINDING;
+                device_release_driver(dev);
+        }
+
+        dev->driver = NULL;
+        usb_set_intfdata(iface, NULL);
+        iface->condition = USB_INTERFACE_UNBOUND;
+        mark_quiesced(iface);
+}
+EXPORT_SYMBOL(usb_driver_release_interface);
+
 /* returns 0 if no match, 1 if match */
 static int usb_match_one_id(struct usb_interface *interface,
                             const struct usb_device_id *id)
@@ -402,6 +454,120 @@ int usb_device_match(struct device *dev, struct device_driver *drv)
         return 0;
 }
 
+#ifdef  CONFIG_HOTPLUG
+
+/*
+ * This sends an uevent to userspace, typically helping to load driver
+ * or other modules, configure the device, and more.  Drivers can provide
+ * a MODULE_DEVICE_TABLE to help with module loading subtasks.
+ *
+ * We're called either from khubd (the typical case) or from root hub
+ * (init, kapmd, modprobe, rmmod, etc), but the agents need to handle
+ * delays in event delivery.  Use sysfs (and DEVPATH) to make sure the
+ * device (and this configuration!) are still present.
+ */
+static int usb_uevent(struct device *dev, char **envp, int num_envp,
+                      char *buffer, int buffer_size)
+{
+        struct usb_interface *intf;
+        struct usb_device *usb_dev;
+        struct usb_host_interface *alt;
+        int i = 0;
+        int length = 0;
+
+        if (!dev)
+                return -ENODEV;
+
+        /* driver is often null here; dev_dbg() would oops */
+        pr_debug ("usb %s: uevent\n", dev->bus_id);
+
+        /* Must check driver_data here, as on remove driver is always NULL */
+        if ((dev->driver == &usb_generic_driver) ||
+            (dev->driver_data == &usb_generic_driver_data))
+                return 0;
+
+        intf = to_usb_interface(dev);
+        usb_dev = interface_to_usbdev (intf);
+        alt = intf->cur_altsetting;
+
+        if (usb_dev->devnum < 0) {
+                pr_debug ("usb %s: already deleted?\n", dev->bus_id);
+                return -ENODEV;
+        }
+        if (!usb_dev->bus) {
+                pr_debug ("usb %s: bus removed?\n", dev->bus_id);
+                return -ENODEV;
+        }
+
+#ifdef  CONFIG_USB_DEVICEFS
+        /* If this is available, userspace programs can directly read
+         * all the device descriptors we don't tell them about.  Or
+         * even act as usermode drivers.
+         *
+         * FIXME reduce hardwired intelligence here
+         */
+        if (add_uevent_var(envp, num_envp, &i,
+                           buffer, buffer_size, &length,
+                           "DEVICE=/proc/bus/usb/%03d/%03d",
+                           usb_dev->bus->busnum, usb_dev->devnum))
+                return -ENOMEM;
+#endif
+
+        /* per-device configurations are common */
+        if (add_uevent_var(envp, num_envp, &i,
+                           buffer, buffer_size, &length,
+                           "PRODUCT=%x/%x/%x",
+                           le16_to_cpu(usb_dev->descriptor.idVendor),
+                           le16_to_cpu(usb_dev->descriptor.idProduct),
+                           le16_to_cpu(usb_dev->descriptor.bcdDevice)))
+                return -ENOMEM;
+
+        /* class-based driver binding models */
+        if (add_uevent_var(envp, num_envp, &i,
+                           buffer, buffer_size, &length,
+                           "TYPE=%d/%d/%d",
+                           usb_dev->descriptor.bDeviceClass,
+                           usb_dev->descriptor.bDeviceSubClass,
+                           usb_dev->descriptor.bDeviceProtocol))
+                return -ENOMEM;
+
+        if (add_uevent_var(envp, num_envp, &i,
+                           buffer, buffer_size, &length,
+                           "INTERFACE=%d/%d/%d",
+                           alt->desc.bInterfaceClass,
+                           alt->desc.bInterfaceSubClass,
+                           alt->desc.bInterfaceProtocol))
+                return -ENOMEM;
+
+        if (add_uevent_var(envp, num_envp, &i,
+                           buffer, buffer_size, &length,
+                           "MODALIAS=usb:v%04Xp%04Xd%04Xdc%02Xdsc%02Xdp%02Xic%02Xisc%02Xip%02X",
+                           le16_to_cpu(usb_dev->descriptor.idVendor),
+                           le16_to_cpu(usb_dev->descriptor.idProduct),
+                           le16_to_cpu(usb_dev->descriptor.bcdDevice),
+                           usb_dev->descriptor.bDeviceClass,
+                           usb_dev->descriptor.bDeviceSubClass,
+                           usb_dev->descriptor.bDeviceProtocol,
+                           alt->desc.bInterfaceClass,
+                           alt->desc.bInterfaceSubClass,
+                           alt->desc.bInterfaceProtocol))
+                return -ENOMEM;
+
+        envp[i] = NULL;
+
+        return 0;
+}
+
+#else
+
+static int usb_uevent(struct device *dev, char **envp,
+                        int num_envp, char *buffer, int buffer_size)
+{
+        return -ENODEV;
+}
+
+#endif  /* CONFIG_HOTPLUG */
+
 /**
  * usb_register_driver - register a USB driver
  * @new_driver: USB operations for the driver
@@ -469,3 +635,119 @@ void usb_deregister(struct usb_driver *driver)
         usbfs_update_special();
 }
 EXPORT_SYMBOL_GPL_FUTURE(usb_deregister);
+
+#ifdef CONFIG_PM
+
+static int verify_suspended(struct device *dev, void *unused)
+{
+        if (dev->driver == NULL)
+                return 0;
+        return (dev->power.power_state.event == PM_EVENT_ON) ? -EBUSY : 0;
+}
+
+static int usb_generic_suspend(struct device *dev, pm_message_t message)
+{
+        struct usb_interface    *intf;
+        struct usb_driver       *driver;
+        int                     status;
+
+        /* USB devices enter SUSPEND state through their hubs, but can be
+         * marked for FREEZE as soon as their children are already idled.
+         * But those semantics are useless, so we equate the two (sigh).
+         */
+        if (dev->driver == &usb_generic_driver) {
+                if (dev->power.power_state.event == message.event)
+                        return 0;
+                /* we need to rule out bogus requests through sysfs */
+                status = device_for_each_child(dev, NULL, verify_suspended);
+                if (status)
+                        return status;
+                return usb_port_suspend(to_usb_device(dev));
+        }
+
+        if ((dev->driver == NULL) ||
+            (dev->driver_data == &usb_generic_driver_data))
+                return 0;
+
+        intf = to_usb_interface(dev);
+        driver = to_usb_driver(dev->driver);
+
+        /* with no hardware, USB interfaces only use FREEZE and ON states */
+        if (!is_active(intf))
+                return 0;
+
+        if (driver->suspend && driver->resume) {
+                status = driver->suspend(intf, message);
+                if (status)
+                        dev_err(dev, "%s error %d\n", "suspend", status);
+                else
+                        mark_quiesced(intf);
+        } else {
+                // FIXME else if there's no suspend method, disconnect...
+                dev_warn(dev, "no suspend for driver %s?\n", driver->name);
+                mark_quiesced(intf);
+                status = 0;
+        }
+        return status;
+}
+
+static int usb_generic_resume(struct device *dev)
+{
+        struct usb_interface    *intf;
+        struct usb_driver       *driver;
+        struct usb_device       *udev;
+        int                     status;
+
+        if (dev->power.power_state.event == PM_EVENT_ON)
+                return 0;
+
+        /* mark things as "on" immediately, no matter what errors crop up */
+        dev->power.power_state.event = PM_EVENT_ON;
+
+        /* devices resume through their hubs */
+        if (dev->driver == &usb_generic_driver) {
+                udev = to_usb_device(dev);
+                if (udev->state == USB_STATE_NOTATTACHED)
+                        return 0;
+                return usb_port_resume(udev);
+        }
+
+        if ((dev->driver == NULL) ||
+            (dev->driver_data == &usb_generic_driver_data)) {
+                dev->power.power_state.event = PM_EVENT_FREEZE;
+                return 0;
+        }
+
+        intf = to_usb_interface(dev);
+        driver = to_usb_driver(dev->driver);
+
+        udev = interface_to_usbdev(intf);
+        if (udev->state == USB_STATE_NOTATTACHED)
+                return 0;
+
+        /* if driver was suspended, it has a resume method;
+         * however, sysfs can wrongly mark things as suspended
+         * (on the "no suspend method" FIXME path above)
+         */
+        if (driver->resume) {
+                status = driver->resume(intf);
+                if (status) {
+                        dev_err(dev, "%s error %d\n", "resume", status);
+                        mark_quiesced(intf);
+                }
+        } else
+                dev_warn(dev, "no resume for driver %s?\n", driver->name);
+        return 0;
+}
+
+#endif /* CONFIG_PM */
+
+struct bus_type usb_bus_type = {
+        .name =         "usb",
+        .match =        usb_device_match,
+        .uevent =       usb_uevent,
+#ifdef CONFIG_PM
+        .suspend =      usb_generic_suspend,
+        .resume =       usb_generic_resume,
+#endif
+};
diff --git a/drivers/usb/core/generic.c b/drivers/usb/core/generic.c
new file mode 100644
index 00000000000..7bab9769b34
--- /dev/null
+++ b/drivers/usb/core/generic.c
@@ -0,0 +1,53 @@
+/*
+ * drivers/usb/generic.c - generic driver for USB devices (not interfaces)
+ *
+ * (C) Copyright 2005 Greg Kroah-Hartman <gregkh@suse.de>
+ *
+ * based on drivers/usb/usb.c which had the following copyrights:
+ *      (C) Copyright Linus Torvalds 1999
+ *      (C) Copyright Johannes Erdfelt 1999-2001
+ *      (C) Copyright Andreas Gal 1999
+ *      (C) Copyright Gregory P. Smith 1999
+ *      (C) Copyright Deti Fliegl 1999 (new USB architecture)
+ *      (C) Copyright Randy Dunlap 2000
+ *      (C) Copyright David Brownell 2000-2004
+ *      (C) Copyright Yggdrasil Computing, Inc. 2000
+ *              (usb_device_id matching changes by Adam J. Richter)
+ *      (C) Copyright Greg Kroah-Hartman 2002-2003
+ *
+ */
+
+#include <linux/config.h>
+#include <linux/usb.h>
+#include "usb.h"
+
+static int generic_probe(struct device *dev)
+{
+        return 0;
+}
+static int generic_remove(struct device *dev)
+{
+        struct usb_device *udev = to_usb_device(dev);
+
+        /* if this is only an unbind, not a physical disconnect, then
+         * unconfigure the device */
+        if (udev->state == USB_STATE_CONFIGURED)
+                usb_set_configuration(udev, 0);
+
+        /* in case the call failed or the device was suspended */
+        if (udev->state >= USB_STATE_CONFIGURED)
+                usb_disable_device(udev, 0);
+        return 0;
+}
+
+struct device_driver usb_generic_driver = {
+        .owner = THIS_MODULE,
+        .name = "usb",
+        .bus = &usb_bus_type,
+        .probe = generic_probe,
+        .remove = generic_remove,
+};
+
+/* Fun hack to determine if the struct device is a
+ * usb device or a usb interface. */
+int usb_generic_driver_data;
diff --git a/drivers/usb/core/usb.c b/drivers/usb/core/usb.c
index b28a31b2030..0b8c67bcde6 100644
--- a/drivers/usb/core/usb.c
+++ b/drivers/usb/core/usb.c
@@ -112,87 +112,6 @@ struct usb_host_interface *usb_altnum_to_altsetting(struct usb_interface *intf,
         return NULL;
 }
 
-/**
- * usb_driver_claim_interface - bind a driver to an interface
- * @driver: the driver to be bound
- * @iface: the interface to which it will be bound; must be in the
- *      usb device's active configuration
- * @priv: driver data associated with that interface
- *
- * This is used by usb device drivers that need to claim more than one
- * interface on a device when probing (audio and acm are current examples).
- * No device driver should directly modify internal usb_interface or
- * usb_device structure members.
- *
- * Few drivers should need to use this routine, since the most natural
- * way to bind to an interface is to return the private data from
- * the driver's probe() method.
- *
- * Callers must own the device lock and the driver model's usb_bus_type.subsys
- * writelock.  So driver probe() entries don't need extra locking,
- * but other call contexts may need to explicitly claim those locks.
- */
-int usb_driver_claim_interface(struct usb_driver *driver,
-                                struct usb_interface *iface, void* priv)
-{
-        struct device *dev = &iface->dev;
-
-        if (dev->driver)
-                return -EBUSY;
-
-        dev->driver = &driver->driver;
-        usb_set_intfdata(iface, priv);
-        iface->condition = USB_INTERFACE_BOUND;
-        mark_active(iface);
-
-        /* if interface was already added, bind now; else let
-         * the future device_add() bind it, bypassing probe()
-         */
-        if (device_is_registered(dev))
-                device_bind_driver(dev);
-
-        return 0;
-}
-
-/**
- * usb_driver_release_interface - unbind a driver from an interface
- * @driver: the driver to be unbound
- * @iface: the interface from which it will be unbound
- *
- * This can be used by drivers to release an interface without waiting
- * for their disconnect() methods to be called.  In typical cases this
- * also causes the driver disconnect() method to be called.
- *
- * This call is synchronous, and may not be used in an interrupt context.
- * Callers must own the device lock and the driver model's usb_bus_type.subsys
- * writelock.  So driver disconnect() entries don't need extra locking,
- * but other call contexts may need to explicitly claim those locks.
- */
-void usb_driver_release_interface(struct usb_driver *driver,
-                                        struct usb_interface *iface)
-{
-        struct device *dev = &iface->dev;
-
-        /* this should never happen, don't release something that's not ours */
-        if (!dev->driver || dev->driver != &driver->driver)
-                return;
-
-        /* don't release from within disconnect() */
-        if (iface->condition != USB_INTERFACE_BOUND)
-                return;
-
-        /* don't release if the interface hasn't been added yet */
-        if (device_is_registered(dev)) {
-                iface->condition = USB_INTERFACE_UNBINDING;
-                device_release_driver(dev);
-        }
-
-        dev->driver = NULL;
-        usb_set_intfdata(iface, NULL);
-        iface->condition = USB_INTERFACE_UNBOUND;
-        mark_quiesced(iface);
-}
-
 struct find_interface_arg {
         int minor;
         struct usb_interface *interface;
@@ -234,120 +153,6 @@ struct usb_interface *usb_find_interface(struct usb_driver *drv, int minor)
         return argb.interface;
 }
 
-#ifdef  CONFIG_HOTPLUG
-
-/*
- * This sends an uevent to userspace, typically helping to load driver
- * or other modules, configure the device, and more.  Drivers can provide
- * a MODULE_DEVICE_TABLE to help with module loading subtasks.
- *
- * We're called either from khubd (the typical case) or from root hub
- * (init, kapmd, modprobe, rmmod, etc), but the agents need to handle
- * delays in event delivery.  Use sysfs (and DEVPATH) to make sure the
- * device (and this configuration!) are still present.
- */
-static int usb_uevent(struct device *dev, char **envp, int num_envp,
-                      char *buffer, int buffer_size)
-{
-        struct usb_interface *intf;
-        struct usb_device *usb_dev;
-        struct usb_host_interface *alt;
-        int i = 0;
-        int length = 0;
-
-        if (!dev)
-                return -ENODEV;
-
-        /* driver is often null here; dev_dbg() would oops */
-        pr_debug ("usb %s: uevent\n", dev->bus_id);
-
-        /* Must check driver_data here, as on remove driver is always NULL */
-        if ((dev->driver == &usb_generic_driver) || 
-            (dev->driver_data == &usb_generic_driver_data))
-                return 0;
-
-        intf = to_usb_interface(dev);
-        usb_dev = interface_to_usbdev (intf);
-        alt = intf->cur_altsetting;
-
-        if (usb_dev->devnum < 0) {
-                pr_debug ("usb %s: already deleted?\n", dev->bus_id);
-                return -ENODEV;
-        }
-        if (!usb_dev->bus) {
-                pr_debug ("usb %s: bus removed?\n", dev->bus_id);
-                return -ENODEV;
-        }
-
-#ifdef  CONFIG_USB_DEVICEFS
-        /* If this is available, userspace programs can directly read
-         * all the device descriptors we don't tell them about.  Or
-         * even act as usermode drivers.
-         *
-         * FIXME reduce hardwired intelligence here
-         */
-        if (add_uevent_var(envp, num_envp, &i,
-                           buffer, buffer_size, &length,
-                           "DEVICE=/proc/bus/usb/%03d/%03d",
-                           usb_dev->bus->busnum, usb_dev->devnum))
-                return -ENOMEM;
-#endif
-
-        /* per-device configurations are common */
-        if (add_uevent_var(envp, num_envp, &i,
-                           buffer, buffer_size, &length,
-                           "PRODUCT=%x/%x/%x",
-                           le16_to_cpu(usb_dev->descriptor.idVendor),
-                           le16_to_cpu(usb_dev->descriptor.idProduct),
-                           le16_to_cpu(usb_dev->descriptor.bcdDevice)))
-                return -ENOMEM;
-
-        /* class-based driver binding models */
-        if (add_uevent_var(envp, num_envp, &i,
-                           buffer, buffer_size, &length,
-                           "TYPE=%d/%d/%d",
-                           usb_dev->descriptor.bDeviceClass,
-                           usb_dev->descriptor.bDeviceSubClass,
-                           usb_dev->descriptor.bDeviceProtocol))
-                return -ENOMEM;
-
-        if (add_uevent_var(envp, num_envp, &i,
-                           buffer, buffer_size, &length,
-                           "INTERFACE=%d/%d/%d",
-                           alt->desc.bInterfaceClass,
-                           alt->desc.bInterfaceSubClass,
-                           alt->desc.bInterfaceProtocol))
-                return -ENOMEM;
-
-        if (add_uevent_var(envp, num_envp, &i,
-                           buffer, buffer_size, &length,
-                           "MODALIAS=usb:v%04Xp%04Xd%04Xdc%02Xdsc%02Xdp%02Xic%02Xisc%02Xip%02X",
-                           le16_to_cpu(usb_dev->descriptor.idVendor),
-                           le16_to_cpu(usb_dev->descriptor.idProduct),
-                           le16_to_cpu(usb_dev->descriptor.bcdDevice),
-                           usb_dev->descriptor.bDeviceClass,
-                           usb_dev->descriptor.bDeviceSubClass,
-                           usb_dev->descriptor.bDeviceProtocol,
-                           alt->desc.bInterfaceClass,
-                           alt->desc.bInterfaceSubClass,
-                           alt->desc.bInterfaceProtocol))
-                return -ENOMEM;
-
-        envp[i] = NULL;
-
-        return 0;
-}
-
-#else
-
-static int usb_uevent(struct device *dev, char **envp,
-                        int num_envp, char *buffer, int buffer_size)
-{
-        return -ENODEV;
-}
-
-#endif  /* CONFIG_HOTPLUG */
-
 /**
  * usb_release_dev - free a usb device structure when all users of it are finished.
  * @dev: device that's been disconnected
@@ -990,116 +795,6 @@ void usb_buffer_unmap_sg (struct usb_device *dev, unsigned pipe,
                         usb_pipein (pipe) ? DMA_FROM_DEVICE : DMA_TO_DEVICE);
 }
 
-static int verify_suspended(struct device *dev, void *unused)
-{
-        if (dev->driver == NULL)
-                return 0;
-        return (dev->power.power_state.event == PM_EVENT_ON) ? -EBUSY : 0;
-}
-
-static int usb_generic_suspend(struct device *dev, pm_message_t message)
-{
-        struct usb_interface    *intf;
-        struct usb_driver       *driver;
-        int                     status;
-
-        /* USB devices enter SUSPEND state through their hubs, but can be
-         * marked for FREEZE as soon as their children are already idled.
-         * But those semantics are useless, so we equate the two (sigh).
-         */
-        if (dev->driver == &usb_generic_driver) {
-                if (dev->power.power_state.event == message.event)
-                        return 0;
-                /* we need to rule out bogus requests through sysfs */
-                status = device_for_each_child(dev, NULL, verify_suspended);
-                if (status)
-                        return status;
-                return usb_port_suspend(to_usb_device(dev));
-        }
-
-        if ((dev->driver == NULL) ||
-            (dev->driver_data == &usb_generic_driver_data))
-                return 0;
-
-        intf = to_usb_interface(dev);
-        driver = to_usb_driver(dev->driver);
-
-        /* with no hardware, USB interfaces only use FREEZE and ON states */
-        if (!is_active(intf))
-                return 0;
-
-        if (driver->suspend && driver->resume) {
-                status = driver->suspend(intf, message);
-                if (status)
-                        dev_err(dev, "%s error %d\n", "suspend", status);
-                else
-                        mark_quiesced(intf);
-        } else {
-                // FIXME else if there's no suspend method, disconnect...
-                dev_warn(dev, "no suspend for driver %s?\n", driver->name);
-                mark_quiesced(intf);
-                status = 0;
-        }
-        return status;
-}
-
-static int usb_generic_resume(struct device *dev)
-{
-        struct usb_interface    *intf;
-        struct usb_driver       *driver;
-        struct usb_device       *udev;
-        int                     status;
-
-        if (dev->power.power_state.event == PM_EVENT_ON)
-                return 0;
-
-        /* mark things as "on" immediately, no matter what errors crop up */
-        dev->power.power_state.event = PM_EVENT_ON;
-
-        /* devices resume through their hubs */
-        if (dev->driver == &usb_generic_driver) {
-                udev = to_usb_device(dev);
-                if (udev->state == USB_STATE_NOTATTACHED)
-                        return 0;
-                return usb_port_resume(udev);
-        }
-
-        if ((dev->driver == NULL) ||
-            (dev->driver_data == &usb_generic_driver_data)) {
-                dev->power.power_state.event = PM_EVENT_FREEZE;
-                return 0;
-        }
-
-        intf = to_usb_interface(dev);
-        driver = to_usb_driver(dev->driver);
-
-        udev = interface_to_usbdev(intf);
-        if (udev->state == USB_STATE_NOTATTACHED)
-                return 0;
-
-        /* if driver was suspended, it has a resume method;
-         * however, sysfs can wrongly mark things as suspended
-         * (on the "no suspend method" FIXME path above)
-         */
-        if (driver->resume) {
-                status = driver->resume(intf);
-                if (status) {
-                        dev_err(dev, "%s error %d\n", "resume", status);
-                        mark_quiesced(intf);
-                }
-        } else
-                dev_warn(dev, "no resume for driver %s?\n", driver->name);
-        return 0;
-}
-
-struct bus_type usb_bus_type = {
-        .name =         "usb",
-        .match =        usb_device_match,
-        .uevent =       usb_uevent,
-        .suspend =      usb_generic_suspend,
-        .resume =       usb_generic_resume,
-};
-
 /* format to disable USB on kernel command line is: nousb */
 __module_param_call("", nousb, param_set_bool, param_get_bool, &nousb, 0444);
 
@@ -1203,8 +898,6 @@ EXPORT_SYMBOL(usb_hub_tt_clear_buffer);
 
 EXPORT_SYMBOL(usb_lock_device_for_reset);
 
-EXPORT_SYMBOL(usb_driver_claim_interface);
-EXPORT_SYMBOL(usb_driver_release_interface);
 EXPORT_SYMBOL(usb_find_interface);
 EXPORT_SYMBOL(usb_ifnum_to_if);
 EXPORT_SYMBOL(usb_altnum_to_altsetting);
diff --git a/drivers/usb/core/usb.h b/drivers/usb/core/usb.h
index 5a4eff5eec8..82d397a6f77 100644
--- a/drivers/usb/core/usb.h
+++ b/drivers/usb/core/usb.h
@@ -33,9 +33,9 @@ extern void usb_host_cleanup(void);
 extern int usb_port_suspend(struct usb_device *dev);
 extern int usb_port_resume(struct usb_device *dev);
 
+extern struct bus_type usb_bus_type;
 extern struct device_driver usb_generic_driver;
 extern int usb_generic_driver_data;
-extern int usb_device_match(struct device *dev, struct device_driver *drv);
 
 /* Interfaces and their "power state" are owned by usbcore */