net: hns3: Add unlikely for dma_mapping_error check

For dma_mapping_error is unlikely happened, this patch adds unlikely for
dma_mapping_error check.

Signed-off-by: Jian Shen <shenjian15@huawei.com>
Signed-off-by: Peng Li <lipeng321@huawei.com>
Signed-off-by: Salil Mehta <salil.mehta@huawei.com>
Signed-off-by: David S. Miller <davem@davemloft.net>

diff --git a/drivers/net/ethernet/hisilicon/hns3/hns3_enet.c b/drivers/net/ethernet/hisilicon/hns3/hns3_enet.c
index 73b42d3..8b63707 100644 (file)
--- a/drivers/net/ethernet/hisilicon/hns3/hns3_enet.c
+++ b/drivers/net/ethernet/hisilicon/hns3/hns3_enet.c
@@ -1807,7 +1807,7 @@ static int hns3_map_buffer(struct hns3_enet_ring *ring, struct hns3_desc_cb *cb)
        cb->dma = dma_map_page(ring_to_dev(ring), cb->priv, 0,
                               cb->length, ring_to_dma_dir(ring));
 
-       if (dma_mapping_error(ring_to_dev(ring), cb->dma))
+       if (unlikely(dma_mapping_error(ring_to_dev(ring), cb->dma)))
                return -EIO;
 
        return 0;