sfc: commonise efx_sync_rx_buffer()

The ef100 RX path will also need to DMA-sync RX buffers.
Signed-off-by: Edward Cree <ecree@solarflare.com>
Signed-off-by: David S. Miller <davem@davemloft.net>

drivers/net/ethernet/sfc/rx.c

@@ -40,14 +40,6 @@
 #define EFX_RX_MAX_FRAGS DIV_ROUND_UP(EFX_MAX_FRAME_LEN(EFX_MAX_MTU), \
 				      EFX_RX_USR_BUF_SIZE)
 
-static inline void efx_sync_rx_buffer(struct efx_nic *efx,
-				      struct efx_rx_buffer *rx_buf,
-				      unsigned int len)
-{
-	dma_sync_single_for_cpu(&efx->pci_dev->dev, rx_buf->dma_addr, len,
-				DMA_FROM_DEVICE);
-}
-
 static void efx_rx_packet__check_len(struct efx_rx_queue *rx_queue,
 				     struct efx_rx_buffer *rx_buf,
 				     int len)

drivers/net/ethernet/sfc/rx_common.h

@@ -57,6 +57,15 @@ void efx_init_rx_buffer(struct efx_rx_queue *rx_queue,
 			unsigned int page_offset,
 			u16 flags);
 void efx_unmap_rx_buffer(struct efx_nic *efx, struct efx_rx_buffer *rx_buf);
+
+static inline void efx_sync_rx_buffer(struct efx_nic *efx,
+				      struct efx_rx_buffer *rx_buf,
+				      unsigned int len)
+{
+	dma_sync_single_for_cpu(&efx->pci_dev->dev, rx_buf->dma_addr, len,
+				DMA_FROM_DEVICE);
+}
+
 void efx_free_rx_buffers(struct efx_rx_queue *rx_queue,
 			 struct efx_rx_buffer *rx_buf,
 			 unsigned int num_bufs);