net: hns: Free irq when exit from abnormal branch

BugLink: https://bugs.launchpad.net/bugs/1810457
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>
(cherry picked from commit c82bd077e1ba3dd586569c733dc6d3dd4b0e43cd)
Signed-off-by: dann frazier <dann.frazier@canonical.com>
Acked-by: Stefan Bader <stefan.bader@canonical.com>
Acked-by: Kleber Sacilotto de Souza <kleber.souza@canonical.com>
Signed-off-by: Kleber Sacilotto de Souza <kleber.souza@canonical.com>

diff --git a/drivers/net/ethernet/hisilicon/hns/hns_enet.c b/drivers/net/ethernet/hisilicon/hns/hns_enet.c
index 971225a8cb97b6269c12a1b91dd93a635e7dc538..6f21594fe008c8db23db01aea61641a8fc237861 100644 (file)
--- a/drivers/net/ethernet/hisilicon/hns/hns_enet.c
+++ b/drivers/net/ethernet/hisilicon/hns/hns_enet.c
@@ -1276,6 +1276,22 @@ 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;
@@ -1301,7 +1317,7 @@ 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);
 
@@ -1316,6 +1332,10 @@ 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)
@@ -1363,6 +1383,7 @@ out_has_some_queues:
        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;