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[net-next,08/12] net: hns3: Add unlikely for dma_mapping_error check

Message ID 20180921154148.26756-9-salil.mehta@huawei.com
State New
Headers show
Series Bug fixes, snall modifications & cleanup for HNS3 driver | expand

Commit Message

Salil Mehta Sept. 21, 2018, 3:41 p.m. UTC 
From: Jian Shen <shenjian15@huawei.com>


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>

---
 drivers/net/ethernet/hisilicon/hns3/hns3_enet.c | 2 +-
 1 file changed, 1 insertion(+), 1 deletion(-)

-- 
2.7.4
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Patch

diff --git a/drivers/net/ethernet/hisilicon/hns3/hns3_enet.c b/drivers/net/ethernet/hisilicon/hns3/hns3_enet.c
index 73b42d3..8b63707 100644
--- 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;