USB: rename usb_buffer_alloc() and usb_buffer_free() users

For more clearance what the functions actually do,

  usb_buffer_alloc() is renamed to usb_alloc_coherent()
  usb_buffer_free()  is renamed to usb_free_coherent()

They should only be used in code which really needs DMA coherency.

All call sites have been changed accordingly, except for staging
drivers.

Signed-off-by: Daniel Mack <daniel@caiaq.de>
Cc: Alan Stern <stern@rowland.harvard.edu>
Cc: Pedro Ribeiro <pedrib@gmail.com>
Signed-off-by: Greg Kroah-Hartman <gregkh@suse.de>

1 files changed, 5 insertions, 5 deletions

diff --git a/drivers/usb/usb-skeleton.c b/drivers/usb/usb-skeleton.c
index 61522787f39c..d110588b56f1 100644
--- a/drivers/usb/usb-skeleton.c
+++ b/drivers/usb/usb-skeleton.c
@@ -387,8 +387,8 @@ static void skel_write_bulk_callback(struct urb *urb)
         }
 
         /* free up our allocated buffer */
-        usb_buffer_free(urb->dev, urb->transfer_buffer_length,
-                        urb->transfer_buffer, urb->transfer_dma);
+        usb_free_coherent(urb->dev, urb->transfer_buffer_length,
+                          urb->transfer_buffer, urb->transfer_dma);
         up(&dev->limit_sem);
 }
 
@@ -442,8 +442,8 @@ static ssize_t skel_write(struct file *file, const char *user_buffer,
                 goto error;
         }
 
-        buf = usb_buffer_alloc(dev->udev, writesize, GFP_KERNEL,
-                               &urb->transfer_dma);
+        buf = usb_alloc_coherent(dev->udev, writesize, GFP_KERNEL,
+                                 &urb->transfer_dma);
         if (!buf) {
                 retval = -ENOMEM;
                 goto error;
@@ -491,7 +491,7 @@ error_unanchor:
         usb_unanchor_urb(urb);
 error:
         if (urb) {
-                usb_buffer_free(dev->udev, writesize, buf, urb->transfer_dma);
+                usb_free_coherent(dev->udev, writesize, buf, urb->transfer_dma);
                 usb_free_urb(urb);
         }
         up(&dev->limit_sem);