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authorYunsheng Lin <linyunsheng@huawei.com>2020-07-21 19:03:51 +0800
committerDavid S. Miller <davem@davemloft.net>2020-07-21 15:49:17 -0700
commit0ec3b6a7c026e8f404f76d6dda5dae8d262312a0 (patch)
tree4d9fe45751955ad05931bd81d518daf53bef8a09 /drivers
parentb0a422772fec29811e293c7c0e6f991c0fd9241d (diff)
net: hns3: fix for not unmapping TX buffer correctly
When a big TX buffer is sent using multi BD, the driver maps the whole TX buffer, and unmaps it using info in desc_cb corresponding to each BD, but only the info in the desc_cb of first BD is correct, other info in desc_cb is wrong, which causes TX unmapping problem when SMMU is on. Only set the mapping and freeing info in the desc_cb of first BD to fix this problem, because the TX buffer only need to be unmapped and freed once. Fixes: 1e8a7977d09f("net: hns3: add handling for big TX fragment") Signed-off-by: Yunsheng Lin <linyunsheng@huawei.com> Signed-off-by: Huzhong Tan <tanhuazhong@huawei.com> Signed-off-by: David S. Miller <davem@davemloft.net>
Diffstat (limited to 'drivers')
-rw-r--r--drivers/net/ethernet/hisilicon/hns3/hns3_enet.c14
1 files changed, 3 insertions, 11 deletions
diff --git a/drivers/net/ethernet/hisilicon/hns3/hns3_enet.c b/drivers/net/ethernet/hisilicon/hns3/hns3_enet.c
index c38f3bbe7d97..12f102647d8f 100644
--- a/drivers/net/ethernet/hisilicon/hns3/hns3_enet.c
+++ b/drivers/net/ethernet/hisilicon/hns3/hns3_enet.c
@@ -1118,12 +1118,12 @@ static int hns3_fill_desc(struct hns3_enet_ring *ring, void *priv,
return -ENOMEM;
}
+ desc_cb->priv = priv;
desc_cb->length = size;
+ desc_cb->dma = dma;
+ desc_cb->type = type;
if (likely(size <= HNS3_MAX_BD_SIZE)) {
- desc_cb->priv = priv;
- desc_cb->dma = dma;
- desc_cb->type = type;
desc->addr = cpu_to_le64(dma);
desc->tx.send_size = cpu_to_le16(size);
desc->tx.bdtp_fe_sc_vld_ra_ri =
@@ -1140,13 +1140,6 @@ static int hns3_fill_desc(struct hns3_enet_ring *ring, void *priv,
/* When frag size is bigger than hardware limit, split this frag */
for (k = 0; k < frag_buf_num; k++) {
- /* The txbd's baseinfo of DESC_TYPE_PAGE & DESC_TYPE_SKB */
- desc_cb->priv = priv;
- desc_cb->dma = dma + HNS3_MAX_BD_SIZE * k;
- desc_cb->type = ((type == DESC_TYPE_FRAGLIST_SKB ||
- type == DESC_TYPE_SKB) && !k) ?
- type : DESC_TYPE_PAGE;
-
/* now, fill the descriptor */
desc->addr = cpu_to_le64(dma + HNS3_MAX_BD_SIZE * k);
desc->tx.send_size = cpu_to_le16((k == frag_buf_num - 1) ?
@@ -1158,7 +1151,6 @@ static int hns3_fill_desc(struct hns3_enet_ring *ring, void *priv,
/* move ring pointer to next */
ring_ptr_move_fw(ring, next_to_use);
- desc_cb = &ring->desc_cb[ring->next_to_use];
desc = &ring->desc[ring->next_to_use];
}