Commit 669ff2a9 authored Oct 23, 2017 by Lipeng Committed by Greg Kroah-Hartman Dec 20, 2017

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: 76ad4f0e (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>

parent 122e18d2

drivers/net/ethernet/hisilicon/hns3/hns3pf/hns3_enet.c

+1 −1

Original line number	Diff line number	Diff line
		@@ -1586,7 +1586,7 @@ static int hns3_alloc_ring_buffers(struct hns3_enet_ring *ring)
		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);
		}