sfc: Update RX buffer address together with length

Adjust rx_buf->page_offset when we eat the RX hash prefix.  Remove
efx_rx_buf_offset(), which is now redundant.

Signed-off-by: Ben Hutchings <bhutchings@solarflare.com>

1 files changed, 2 insertions, 1 deletions

diff --git a/drivers/net/ethernet/sfc/net_driver.h b/drivers/net/ethernet/sfc/net_driver.h
index 3fd6dbe5e3dd..1bc911f980b5 100644
--- a/drivers/net/ethernet/sfc/net_driver.h
+++ b/drivers/net/ethernet/sfc/net_driver.h
@@ -208,7 +208,8 @@ struct efx_tx_queue {
  * @dma_addr: DMA base address of the buffer
  * @page: The associated page buffer.
  *      Will be %NULL if the buffer slot is currently free.
- * @page_offset: Offset within page
+ * @page_offset: If pending: offset in @page of DMA base address.
+ *      If completed: offset in @page of Ethernet header.
  * @len: If pending: length for DMA descriptor.
  *      If completed: received length, excluding hash prefix.
  * @flags: Flags for buffer and packet state.