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net: hns3: bugfix for buffer not free problem during resetting

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When hns3_get_ring_config()/hns3_queue_to_ring()/
hns3_get_vector_ring_chain() failed during resetting, the allocated
memory has not been freed before these three functions return. So
this patch adds error handler in these functions to fix it.

Fixes: 76ad4f0ee7 ("net: hns3: Add support of HNS3 Ethernet Driver for hip08 SoC")
Signed-off-by: Huazhong Tan <tanhuazhong@huawei.com>
Signed-off-by: David S. Miller <davem@davemloft.net>
This commit is contained in:
Huazhong Tan 2018-10-30 21:50:44 +08:00 committed by David S. Miller
parent ece4bf46e9
commit 73b907a083
1 changed files with 21 additions and 3 deletions
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24
drivers/net/ethernet/hisilicon/hns3/hns3_enet.c
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@ -2727,7 +2727,7 @@ static int hns3_get_vector_ring_chain(struct hns3_enet_tqp_vector *tqp_vector,
chain = devm_kzalloc(&pdev->dev, sizeof(*chain),
GFP_KERNEL);
if (!chain)
return -ENOMEM;
goto err_free_chain;
cur_chain->next = chain;
chain->tqp_index = tx_ring->tqp->tqp_index;
@ -2757,7 +2757,7 @@ static int hns3_get_vector_ring_chain(struct hns3_enet_tqp_vector *tqp_vector,
while (rx_ring) {
chain = devm_kzalloc(&pdev->dev, sizeof(*chain), GFP_KERNEL);
if (!chain)
return -ENOMEM;
goto err_free_chain;
cur_chain->next = chain;
chain->tqp_index = rx_ring->tqp->tqp_index;
@ -2772,6 +2772,16 @@ static int hns3_get_vector_ring_chain(struct hns3_enet_tqp_vector *tqp_vector,
}
return 0;
err_free_chain:
cur_chain = head->next;
while (cur_chain) {
chain = cur_chain->next;
devm_kfree(&pdev->dev, chain);
cur_chain = chain;
}
return -ENOMEM;
}
static void hns3_free_vector_ring_chain(struct hns3_enet_tqp_vector *tqp_vector,
@ -3037,8 +3047,10 @@ static int hns3_queue_to_ring(struct hnae3_queue *tqp,
return ret;
ret = hns3_ring_get_cfg(tqp, priv, HNAE3_RING_TYPE_RX);
if (ret)
if (ret) {
devm_kfree(priv->dev, priv->ring_data[tqp->tqp_index].ring);
return ret;
}
return 0;
}
@ -3065,6 +3077,12 @@ static int hns3_get_ring_config(struct hns3_nic_priv *priv)
return 0;
err:
while (i--) {
devm_kfree(priv->dev, priv->ring_data[i].ring);
devm_kfree(priv->dev,
priv->ring_data[i + h->kinfo.num_tqps].ring);
}
devm_kfree(&pdev->dev, priv->ring_data);
return ret;
}