AuxXxilium/linux_dsm_epyc7002
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net: hns: Free irq when exit from abnormal branch

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1.In "hns_nic_init_irq", if request irq fail at index i,
  the function return directly without releasing irq resources
  that already requested.

2.In "hns_nic_net_up" after "hns_nic_init_irq",
  if exceptional branch occurs, irqs that already requested
  are not release.

Signed-off-by: Yonglong Liu <liuyonglong@huawei.com>
Signed-off-by: Peng Li <lipeng321@huawei.com>
Signed-off-by: David S. Miller <davem@davemloft.net>
This commit is contained in:
Yonglong Liu 2018-12-15 11:53:25 +08:00 committed by David S. Miller
parent 31f6b61d81
commit c82bd077e1
1 changed files with 22 additions and 1 deletions
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23
drivers/net/ethernet/hisilicon/hns/hns_enet.c
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@ -1284,6 +1284,22 @@ static int hns_nic_init_affinity_mask(int q_num, int ring_idx,
return cpu;
}
static void hns_nic_free_irq(int q_num, struct hns_nic_priv *priv)
{
int i;
for (i = 0; i < q_num * 2; i++) {
if (priv->ring_data[i].ring->irq_init_flag == RCB_IRQ_INITED) {
irq_set_affinity_hint(priv->ring_data[i].ring->irq,
NULL);
free_irq(priv->ring_data[i].ring->irq,
&priv->ring_data[i]);
priv->ring_data[i].ring->irq_init_flag =
RCB_IRQ_NOT_INITED;
}
}
}
static int hns_nic_init_irq(struct hns_nic_priv *priv)
{
struct hnae_handle *h = priv->ae_handle;
@ -1309,7 +1325,7 @@ static int hns_nic_init_irq(struct hns_nic_priv *priv)
if (ret) {
netdev_err(priv->netdev, "request irq(%d) fail\n",
rd->ring->irq);
return ret;
goto out_free_irq;
}
disable_irq(rd->ring->irq);
@ -1324,6 +1340,10 @@ static int hns_nic_init_irq(struct hns_nic_priv *priv)
}
return 0;
out_free_irq:
hns_nic_free_irq(h->q_num, priv);
return ret;
}
static int hns_nic_net_up(struct net_device *ndev)
@ -1371,6 +1391,7 @@ static int hns_nic_net_up(struct net_device *ndev)
for (j = i - 1; j >= 0; j--)
hns_nic_ring_close(ndev, j);
hns_nic_free_irq(h->q_num, priv);
set_bit(NIC_STATE_DOWN, &priv->state);
return ret;