[PATCH] NFS: Make searching and waiting on busy writeback requests more efficient.

[safe/jmp/linux-2.6] / include / linux / usb.h

diff --git a/include/linux/usb.h b/include/linux/usb.h
index c967284..3d508bf 100644 (file)
--- a/include/linux/usb.h
+++ b/include/linux/usb.h
@@ -287,15 +287,14 @@ struct usb_bus {
 
        struct dentry *usbfs_dentry;    /* usbfs dentry entry for the bus */
 
-       struct class_device class_dev;  /* class device for this bus */
+       struct class_device *class_dev; /* class device for this bus */
+       struct kref kref;               /* handles reference counting this bus */
        void (*release)(struct usb_bus *bus);   /* function to destroy this bus's memory */
 #if defined(CONFIG_USB_MON) || defined(CONFIG_USB_MON_MODULE)
        struct mon_bus *mon_bus;        /* non-null when associated */
        int monitored;                  /* non-zero when monitored */
 #endif
 };
-#define        to_usb_bus(d) container_of(d, struct usb_bus, class_dev)
-
 
 /* -------------------------------------------------------------------------- */
 
@@ -558,7 +557,7 @@ struct usb_driver {
 
        int (*ioctl) (struct usb_interface *intf, unsigned int code, void *buf);
 
-       int (*suspend) (struct usb_interface *intf, u32 state);
+       int (*suspend) (struct usb_interface *intf, pm_message_t message);
        int (*resume) (struct usb_interface *intf);
 
        const struct usb_device_id *id_table;
@@ -796,6 +795,10 @@ typedef void (*usb_complete_t)(struct urb *, struct pt_regs *);
  * of the iso_frame_desc array, and the number of errors is reported in
  * error_count.  Completion callbacks for ISO transfers will normally
  * (re)submit URBs to ensure a constant transfer rate.
+ *
+ * Note that even fields marked "public" should not be touched by the driver
+ * when the urb is owned by the hcd, that is, since the call to
+ * usb_submit_urb() till the entry into the completion routine.
  */
 struct urb
 {
@@ -803,12 +806,12 @@ struct urb
        struct kref kref;               /* reference count of the URB */
        spinlock_t lock;                /* lock for the URB */
        void *hcpriv;                   /* private data for host controller */
-       struct list_head urb_list;      /* list pointer to all active urbs */
        int bandwidth;                  /* bandwidth for INT/ISO request */
        atomic_t use_count;             /* concurrent submissions counter */
        u8 reject;                      /* submissions will fail */
 
        /* public, documented fields in the urb that can be used by drivers */
+       struct list_head urb_list;      /* list head for use by the urb owner */
        struct usb_device *dev;         /* (in) pointer to associated device */
        unsigned int pipe;              /* (in) pipe information */
        int status;                     /* (return) non-ISO status */
@@ -977,7 +980,7 @@ extern int usb_bulk_msg(struct usb_device *usb_dev, unsigned int pipe,
        int timeout);
 
 /* selective suspend/resume */
-extern int usb_suspend_device(struct usb_device *dev, u32 state);
+extern int usb_suspend_device(struct usb_device *dev, pm_message_t message);
 extern int usb_resume_device(struct usb_device *dev);