[PATCH] USB: convert usbfs/inode.c to use usb notifiers

Signed-off-by: Greg Kroah-Hartman <gregkh@suse.de>

drivers/usb/core/hcd.c

@@ -793,7 +793,6 @@ static int usb_register_bus(struct usb_bus *bus)
 	up (&usb_bus_list_lock);
 
 	usb_notify_add_bus(bus);
-	usbfs_add_bus (bus);
 	usbmon_notify_bus_add (bus);
 
 	dev_info (bus->controller, "new USB bus registered, assigned bus number %d\n", bus->busnum);
@@ -823,7 +822,6 @@ static void usb_deregister_bus (struct usb_bus *bus)
 
 	usb_notify_remove_bus(bus);
 	usbmon_notify_bus_remove (bus);
-	usbfs_remove_bus (bus);
 
 	clear_bit (bus->busnum, busmap.busmap);
 

drivers/usb/core/hcd.h

@@ -400,23 +400,13 @@ static inline int hcd_bus_resume (struct usb_bus *bus)
  * these are expected to be called from the USB core/hub thread
  * with the kernel lock held
  */
-extern void usbfs_add_bus(struct usb_bus *bus);
-extern void usbfs_remove_bus(struct usb_bus *bus);
-extern void usbfs_add_device(struct usb_device *dev);
-extern void usbfs_remove_device(struct usb_device *dev);
 extern void usbfs_update_special (void);
-
 extern int usbfs_init(void);
 extern void usbfs_cleanup(void);
 
 #else /* CONFIG_USB_DEVICEFS */
 
-static inline void usbfs_add_bus(struct usb_bus *bus) {}
-static inline void usbfs_remove_bus(struct usb_bus *bus) {}
-static inline void usbfs_add_device(struct usb_device *dev) {}
-static inline void usbfs_remove_device(struct usb_device *dev) {}
 static inline void usbfs_update_special (void) {}
-
 static inline int usbfs_init(void) { return 0; }
 static inline void usbfs_cleanup(void) { }
 

drivers/usb/core/hub.c

@@ -1136,7 +1136,6 @@ void usb_disconnect(struct usb_device **pdev)
 	 */
 	dev_dbg (&udev->dev, "unregistering device\n");
 	release_address(udev);
-	usbfs_remove_device(udev);
 	usb_remove_sysfs_dev_files(udev);
 
 	/* Avoid races with recursively_mark_NOTATTACHED() */
@@ -1374,8 +1373,6 @@ int usb_new_device(struct usb_device *udev)
 	/* USB device state == configured ... usable */
 	usb_notify_add_device(udev);
 
-	/* add a /proc/bus/usb entry */
-	usbfs_add_device(udev);
 	return 0;
 
 fail:

drivers/usb/core/inode.c

@@ -39,6 +39,7 @@
 #include <linux/usbdevice_fs.h>
 #include <linux/smp_lock.h>
 #include <linux/parser.h>
+#include <linux/notifier.h>
 #include <asm/byteorder.h>
 #include "usb.h"
 #include "hcd.h"
@@ -619,7 +620,7 @@ void usbfs_update_special (void)
 	}
 }
 
-void usbfs_add_bus(struct usb_bus *bus)
+static void usbfs_add_bus(struct usb_bus *bus)
 {
 	struct dentry *parent;
 	char name[8];
@@ -642,12 +643,9 @@ void usbfs_add_bus(struct usb_bus *bus)
 		err ("error creating usbfs bus entry");
 		return;
 	}
-
-	usbfs_update_special();
-	usbfs_conn_disc_event();
 }
 
-void usbfs_remove_bus(struct usb_bus *bus)
+static void usbfs_remove_bus(struct usb_bus *bus)
 {
 	if (bus->usbfs_dentry) {
 		fs_remove_file (bus->usbfs_dentry);
@@ -659,12 +657,9 @@ void usbfs_remove_bus(struct usb_bus *bus)
 		remove_special_files();
 		num_buses = 0;
 	}
-
-	usbfs_update_special();
-	usbfs_conn_disc_event();
 }
 
-void usbfs_add_device(struct usb_device *dev)
+static void usbfs_add_device(struct usb_device *dev)
 {
 	char name[8];
 	int i;
@@ -690,12 +685,9 @@ void usbfs_add_device(struct usb_device *dev)
 	}
 	if (dev->usbfs_dentry->d_inode)
 		dev->usbfs_dentry->d_inode->i_size = i_size;
-
-	usbfs_update_special();
-	usbfs_conn_disc_event();
 }
 
-void usbfs_remove_device(struct usb_device *dev)
+static void usbfs_remove_device(struct usb_device *dev)
 {
 	struct dev_state *ds;
 	struct siginfo sinfo;
@@ -716,10 +708,33 @@ void usbfs_remove_device(struct usb_device *dev)
 			kill_proc_info_as_uid(ds->discsignr, &sinfo, ds->disc_pid, ds->disc_uid, ds->disc_euid);
 		}
 	}
+}
+
+static int usbfs_notify(struct notifier_block *self, unsigned long action, void *dev)
+{
+	switch (action) {
+	case USB_DEVICE_ADD:
+		usbfs_add_device(dev);
+		break;
+	case USB_DEVICE_REMOVE:
+		usbfs_remove_device(dev);
+		break;
+	case USB_BUS_ADD:
+		usbfs_add_bus(dev);
+		break;
+	case USB_BUS_REMOVE:
+		usbfs_remove_bus(dev);
+	}
+
 	usbfs_update_special();
 	usbfs_conn_disc_event();
+	return NOTIFY_OK;
 }
 
+static struct notifier_block usbfs_nb = {
+	.notifier_call = 	usbfs_notify,
+};
+
 /* --------------------------------------------------------------------- */
 
 static struct proc_dir_entry *usbdir = NULL;
@@ -732,6 +747,8 @@ int __init usbfs_init(void)
 	if (retval)
 		return retval;
 
+	usb_register_notify(&usbfs_nb);
+
 	/* create mount point for usbfs */
 	usbdir = proc_mkdir("usb", proc_bus);
 
@@ -740,6 +757,7 @@ int __init usbfs_init(void)
 
 void usbfs_cleanup(void)
 {
+	usb_unregister_notify(&usbfs_nb);
 	unregister_filesystem(&usb_fs_type);
 	if (usbdir)
 		remove_proc_entry("usb", proc_bus);