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

[~andy/linux] / drivers / usb / core / inode.c

diff --git a/drivers/usb/core/inode.c b/drivers/usb/core/inode.c
index d07bba01995b814367abb3f2fd7a6cfae6f7ccd7..12f490fdee8f3fad985ab780883ebbd92cbd8707 100644 (file)
--- a/drivers/usb/core/inode.c
+++ b/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);