usb: composite gadget: set vbus_draw current limitation during suspend

This patch modifies the composite gadget to set vbus_draw current limitation
during suspend state. This current limitation in suspend state shouldn't be
more than 2.5mA

Signed-off-by: Hao Wu <hao.wu@intel.com>
Signed-off-by: Greg Kroah-Hartman <gregkh@suse.de>

drivers/usb/gadget/composite.c

@@ -1188,6 +1188,8 @@ composite_suspend(struct usb_gadget *gadget)
 		composite->suspend(cdev);
 
 	cdev->suspended = 1;
+
+	usb_gadget_vbus_draw(gadget, 2);
 }
 
 static void
@@ -1195,6 +1197,7 @@ composite_resume(struct usb_gadget *gadget)
 {
 	struct usb_composite_dev	*cdev = get_gadget_data(gadget);
 	struct usb_function		*f;
+	u8				maxpower;
 
 	/* REVISIT:  should we have config level
 	 * suspend/resume callbacks?
@@ -1207,6 +1210,11 @@ composite_resume(struct usb_gadget *gadget)
 			if (f->resume)
 				f->resume(f);
 		}
+
+		maxpower = cdev->config->bMaxPower;
+
+		usb_gadget_vbus_draw(gadget, maxpower ?
+			(2 * maxpower) : CONFIG_USB_GADGET_VBUS_DRAW);
 	}
 
 	cdev->suspended = 0;