bnxt_en: Fix DMA unmapping of the RX buffers in XDP mode during shutdown.

In bnxt_free_rx_skbs(), which is called to free up all RX buffers during
shutdown, we need to unmap the page if we are running in XDP mode.

Fixes: c61fb99cae51 ("bnxt_en: Add RX page mode support.")
Signed-off-by: Michael Chan <michael.chan@broadcom.com>
Signed-off-by: David S. Miller <davem@davemloft.net>

1 files changed, 10 insertions, 5 deletions

diff --git a/drivers/net/ethernet/broadcom/bnxt/bnxt.c b/drivers/net/ethernet/broadcom/bnxt/bnxt.c
index 6c8568780a6a..1f1e54ba0ecb 100644
--- a/drivers/net/ethernet/broadcom/bnxt/bnxt.c
+++ b/drivers/net/ethernet/broadcom/bnxt/bnxt.c
@@ -1983,20 +1983,25 @@ static void bnxt_free_rx_skbs(struct bnxt *bp)
 
                 for (j = 0; j < max_idx; j++) {
                         struct bnxt_sw_rx_bd *rx_buf = &rxr->rx_buf_ring[j];
+                        dma_addr_t mapping = rx_buf->mapping;
                         void *data = rx_buf->data;
 
                         if (!data)
                                 continue;
 
-                        dma_unmap_single(&pdev->dev, rx_buf->mapping,
-                                         bp->rx_buf_use_size, bp->rx_dir);
-
                         rx_buf->data = NULL;
 
-                        if (BNXT_RX_PAGE_MODE(bp))
+                        if (BNXT_RX_PAGE_MODE(bp)) {
+                                mapping -= bp->rx_dma_offset;
+                                dma_unmap_page(&pdev->dev, mapping,
+                                               PAGE_SIZE, bp->rx_dir);
                                 __free_page(data);
-                        else
+                        } else {
+                                dma_unmap_single(&pdev->dev, mapping,
+                                                 bp->rx_buf_use_size,
+                                                 bp->rx_dir);
                                 kfree(data);
+                        }
                 }
 
                 for (j = 0; j < max_agg_idx; j++) {