USB: HCD: Add usb_hcd prefix to exported functions

The convention is to prefix symbols exported from the USB HCD core with
"usb_hcd".  This change makes unmap_urb_setup_for_dma() and
unmap_urb_for_dma() consistent with that.

Signed-off-by: Robert Morell <rmorell@nvidia.com>
Acked-by: Alan Stern <stern@rowland.harvard.edu>
Signed-off-by: Greg Kroah-Hartman <gregkh@suse.de>
diff --git a/drivers/usb/core/hcd.c b/drivers/usb/core/hcd.c
index 6a95017..335c1dd 100644
--- a/drivers/usb/core/hcd.c
+++ b/drivers/usb/core/hcd.c
@@ -1262,7 +1262,7 @@
 	*dma_handle = 0;
 }
 
-void unmap_urb_setup_for_dma(struct usb_hcd *hcd, struct urb *urb)
+void usb_hcd_unmap_urb_setup_for_dma(struct usb_hcd *hcd, struct urb *urb)
 {
 	if (urb->transfer_flags & URB_SETUP_MAP_SINGLE)
 		dma_unmap_single(hcd->self.controller,
@@ -1279,13 +1279,13 @@
 	/* Make it safe to call this routine more than once */
 	urb->transfer_flags &= ~(URB_SETUP_MAP_SINGLE | URB_SETUP_MAP_LOCAL);
 }
-EXPORT_SYMBOL_GPL(unmap_urb_setup_for_dma);
+EXPORT_SYMBOL_GPL(usb_hcd_unmap_urb_setup_for_dma);
 
-void unmap_urb_for_dma(struct usb_hcd *hcd, struct urb *urb)
+void usb_hcd_unmap_urb_for_dma(struct usb_hcd *hcd, struct urb *urb)
 {
 	enum dma_data_direction dir;
 
-	unmap_urb_setup_for_dma(hcd, urb);
+	usb_hcd_unmap_urb_setup_for_dma(hcd, urb);
 
 	dir = usb_urb_dir_in(urb) ? DMA_FROM_DEVICE : DMA_TO_DEVICE;
 	if (urb->transfer_flags & URB_DMA_MAP_SG)
@@ -1314,7 +1314,7 @@
 	urb->transfer_flags &= ~(URB_DMA_MAP_SG | URB_DMA_MAP_PAGE |
 			URB_DMA_MAP_SINGLE | URB_MAP_LOCAL);
 }
-EXPORT_SYMBOL_GPL(unmap_urb_for_dma);
+EXPORT_SYMBOL_GPL(usb_hcd_unmap_urb_for_dma);
 
 static int map_urb_for_dma(struct usb_hcd *hcd, struct urb *urb,
 			   gfp_t mem_flags)
@@ -1410,7 +1410,7 @@
 		}
 		if (ret && (urb->transfer_flags & (URB_SETUP_MAP_SINGLE |
 				URB_SETUP_MAP_LOCAL)))
-			unmap_urb_for_dma(hcd, urb);
+			usb_hcd_unmap_urb_for_dma(hcd, urb);
 	}
 	return ret;
 }
@@ -1451,7 +1451,7 @@
 		if (likely(status == 0)) {
 			status = hcd->driver->urb_enqueue(hcd, urb, mem_flags);
 			if (unlikely(status))
-				unmap_urb_for_dma(hcd, urb);
+				usb_hcd_unmap_urb_for_dma(hcd, urb);
 		}
 	}
 
@@ -1557,7 +1557,7 @@
 			!status))
 		status = -EREMOTEIO;
 
-	unmap_urb_for_dma(hcd, urb);
+	usb_hcd_unmap_urb_for_dma(hcd, urb);
 	usbmon_urb_complete(&hcd->self, urb, status);
 	usb_unanchor_urb(urb);