net: hns3: Add unlikely for dma_mapping_error check

BugLink: https://bugs.launchpad.net/bugs/1810457
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>
(cherry picked from commit 2211f4e1955f11df5fe8df24f5eeda5a5bbe6748)
Signed-off-by: dann frazier <dann.frazier@canonical.com>
Acked-by: Stefan Bader <stefan.bader@canonical.com>
Acked-by: Kleber Sacilotto de Souza <kleber.souza@canonical.com>
Signed-off-by: Kleber Sacilotto de Souza <kleber.souza@canonical.com>

diff --git a/drivers/net/ethernet/hisilicon/hns3/hns3_enet.c b/drivers/net/ethernet/hisilicon/hns3/hns3_enet.c
index b40d885aa758be06d8e14eabca95eea4289a982d..d6a3d59d8892a03aac09e9d6f584aaa3558ae3bb 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;