4 files changed, 15 insertions, 0 deletions

diff --git a/drivers/usb/core/hcd.c b/drivers/usb/core/hcd.c
index 2c79aa6ca2b4..3dd997df8505 100644
--- a/drivers/usb/core/hcd.c
+++ b/drivers/usb/core/hcd.c
@@ -1176,6 +1176,7 @@ int usb_hcd_submit_urb (struct urb *urb, gfp_t mem_flags)
          */
         usb_get_urb(urb);
         atomic_inc(&urb->use_count);
+        atomic_inc(&urb->dev->urbnum);
         usbmon_urb_submit(&hcd->self, urb);
 
         /* NOTE requirements on root-hub callers (usbfs and the hub
@@ -1197,6 +1198,7 @@ int usb_hcd_submit_urb (struct urb *urb, gfp_t mem_flags)
                 urb->hcpriv = NULL;
                 INIT_LIST_HEAD(&urb->urb_list);
                 atomic_dec(&urb->use_count);
+                atomic_dec(&urb->dev->urbnum);
                 if (urb->reject)
                         wake_up(&usb_kill_urb_queue);
                 usb_put_urb(urb);
diff --git a/drivers/usb/core/sysfs.c b/drivers/usb/core/sysfs.c
index e02590297d31..b04afd06e502 100644
--- a/drivers/usb/core/sysfs.c
+++ b/drivers/usb/core/sysfs.c
@@ -169,6 +169,16 @@ show_quirks(struct device *dev, struct device_attribute *attr, char *buf)
 }
 static DEVICE_ATTR(quirks, S_IRUGO, show_quirks, NULL);
 
+static ssize_t
+show_urbnum(struct device *dev, struct device_attribute *attr, char *buf)
+{
+        struct usb_device *udev;
+
+        udev = to_usb_device(dev);
+        return sprintf(buf, "%d\n", atomic_read(&udev->urbnum));
+}
+static DEVICE_ATTR(urbnum, S_IRUGO, show_urbnum, NULL);
+
 
 #if defined(CONFIG_USB_PERSIST) || defined(CONFIG_USB_SUSPEND)
 static const char power_group[] = "power";
@@ -458,6 +468,7 @@ static struct attribute *dev_attrs[] = {
         &dev_attr_bConfigurationValue.attr,
         &dev_attr_bmAttributes.attr,
         &dev_attr_bMaxPower.attr,
+        &dev_attr_urbnum.attr,
         /* device attributes */
         &dev_attr_idVendor.attr,
         &dev_attr_idProduct.attr,
diff --git a/drivers/usb/core/usb.c b/drivers/usb/core/usb.c
index 8121edbd1494..c99938d5f78e 100644
--- a/drivers/usb/core/usb.c
+++ b/drivers/usb/core/usb.c
@@ -266,6 +266,7 @@ usb_alloc_dev(struct usb_device *parent, struct usb_bus *bus, unsigned port1)
         dev->dev.dma_mask = bus->controller->dma_mask;
         set_dev_node(&dev->dev, dev_to_node(bus->controller));
         dev->state = USB_STATE_ATTACHED;
+        atomic_set(&dev->urbnum, 0);
 
         INIT_LIST_HEAD(&dev->ep0.urb_list);
         dev->ep0.desc.bLength = USB_DT_ENDPOINT_SIZE;
diff --git a/include/linux/usb.h b/include/linux/usb.h
index e5b35e0dca23..c10935fdc03a 100644
--- a/include/linux/usb.h
+++ b/include/linux/usb.h
@@ -415,6 +415,7 @@ struct usb_device {
 
         int pm_usage_cnt;               /* usage counter for autosuspend */
         u32 quirks;                     /* quirks of the whole device */
+        atomic_t urbnum;                /* number of URBs submitted for the whole device */
 
 #ifdef CONFIG_PM
         struct delayed_work autosuspend; /* for delayed autosuspends */