net: hns3: fix a bug when alloc new buffer

[ Upstream commit b9077428ec5569aacb2952d8a2ffb51c8988d3c2 ]

When alloce new buffer to HW, should unmap the old buffer first.
This old code map the old buffer but not unmap the old buffer,
this patch fixes it.

Fixes: 76ad4f0 (net: hns3: Add support of HNS3 Ethernet Driver for hip08 SoC)

Signed-off-by: Lipeng <lipeng321@huawei.com>
Signed-off-by: David S. Miller <davem@davemloft.net>
Signed-off-by: Sasha Levin <alexander.levin@verizon.com>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>

diff --git a/drivers/net/ethernet/hisilicon/hns3/hns3pf/hns3_enet.c b/drivers/net/ethernet/hisilicon/hns3/hns3pf/hns3_enet.c
index ea121b0b16ac9c78d47676dba31bf7be9ff5fa6b..186772493711e2e7a567079cf9d8c31ff0e605da 100644 (file)
--- a/drivers/net/ethernet/hisilicon/hns3/hns3pf/hns3_enet.c
+++ b/drivers/net/ethernet/hisilicon/hns3/hns3pf/hns3_enet.c
@@ -1586,7 +1586,7 @@ out_buffer_fail:
 static void hns3_replace_buffer(struct hns3_enet_ring *ring, int i,
                                struct hns3_desc_cb *res_cb)
 {
-       hns3_map_buffer(ring, &ring->desc_cb[i]);
+       hns3_unmap_buffer(ring, &ring->desc_cb[i]);
        ring->desc_cb[i] = *res_cb;
        ring->desc[i].addr = cpu_to_le64(ring->desc_cb[i].dma);
 }