USB: rename usb_buffer_alloc() and usb_buffer_free()
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.
[added compatibility macros so we can convert things easier - gregkh]
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>
diff --git a/include/linux/usb.h b/include/linux/usb.h
index ce1323c..739f1fd 100644
--- a/include/linux/usb.h
+++ b/include/linux/usb.h
@@ -1085,7 +1085,7 @@
* Alternatively, drivers may pass the URB_NO_xxx_DMA_MAP transfer flags,
* which tell the host controller driver that no such mapping is needed since
* the device driver is DMA-aware. For example, a device driver might
- * allocate a DMA buffer with usb_buffer_alloc() or call usb_buffer_map().
+ * allocate a DMA buffer with usb_alloc_coherent() or call usb_buffer_map().
* When these transfer flags are provided, host controller drivers will
* attempt to use the dma addresses found in the transfer_dma and/or
* setup_dma fields rather than determining a dma address themselves.
@@ -1366,11 +1366,23 @@
return (urb->transfer_flags & URB_DIR_MASK) == URB_DIR_OUT;
}
-void *usb_buffer_alloc(struct usb_device *dev, size_t size,
+void *usb_alloc_coherent(struct usb_device *dev, size_t size,
gfp_t mem_flags, dma_addr_t *dma);
-void usb_buffer_free(struct usb_device *dev, size_t size,
+void usb_free_coherent(struct usb_device *dev, size_t size,
void *addr, dma_addr_t dma);
+/* Compatible macros while we switch over */
+static inline void *usb_buffer_alloc(struct usb_device *dev, size_t size,
+ gfp_t mem_flags, dma_addr_t *dma)
+{
+ return usb_alloc_coherent(dev, size, mem_flags, dma);
+}
+static inline void usb_buffer_free(struct usb_device *dev, size_t size,
+ void *addr, dma_addr_t dma)
+{
+ return usb_free_coherent(dev, size, addr, dma);
+}
+
#if 0
struct urb *usb_buffer_map(struct urb *urb);
void usb_buffer_dmasync(struct urb *urb);