[PATCH net 3/3] bnxt_en: Fix DMA unmapping of the RX buffers in XDP mode during shutdown.

[Michael Chan]

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.c...@broadcom.com>
---
 drivers/net/ethernet/broadcom/bnxt/bnxt.c | 15 ++++++++++-----
 1 file changed, 10 insertions(+), 5 deletions(-)

diff --git a/drivers/net/ethernet/broadcom/bnxt/bnxt.c 
b/drivers/net/ethernet/broadcom/bnxt/bnxt.c
index 6c856878..1f1e54b 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++) {
-- 
1.8.3.1