netdev - [Patch V4 net 01/11] net: hns3: add error handler for hns3_nic_init_vector

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Message-ID: <1540821261-55002-2-git-send-email-tanhuazhong@huawei.com>
Date:   Mon, 29 Oct 2018 21:54:11 +0800
From:   Huazhong Tan <tanhuazhong@...wei.com>
To:     <davem@...emloft.net>, <sergei.shtylyov@...entembedded.com>
CC:     <netdev@...r.kernel.org>, <linuxarm@...wei.com>,
        <salil.mehta@...wei.com>, <yisen.zhuang@...wei.com>,
        <lipeng321@...wei.com>, <linyunsheng@...wei.com>
Subject: [Patch V4 net 01/11] net: hns3: add error handler for hns3_nic_init_vector_data()

When hns3_nic_init_vector_data() fails to map ring to vector,
it should cancel the netif_napi_add() that has been successfully
done and then exits.

Fixes: 76ad4f0ee747 ("net: hns3: Add support of HNS3 Ethernet Driver for hip08 SoC")
Signed-off-by: Huazhong Tan <tanhuazhong@...wei.com>
---
 drivers/net/ethernet/hisilicon/hns3/hns3_enet.c | 10 ++++++++--
 1 file changed, 8 insertions(+), 2 deletions(-)

diff --git a/drivers/net/ethernet/hisilicon/hns3/hns3_enet.c b/drivers/net/ethernet/hisilicon/hns3/hns3_enet.c
index 32f3aca8..d9066c5 100644
--- a/drivers/net/ethernet/hisilicon/hns3/hns3_enet.c
+++ b/drivers/net/ethernet/hisilicon/hns3/hns3_enet.c
@@ -2821,7 +2821,7 @@ static int hns3_nic_init_vector_data(struct hns3_nic_priv *priv)
 	struct hnae3_handle *h = priv->ae_handle;
 	struct hns3_enet_tqp_vector *tqp_vector;
 	int ret = 0;
-	u16 i;
+	int i, j;
 
 	hns3_nic_set_cpumask(priv);
 
@@ -2868,13 +2868,19 @@ static int hns3_nic_init_vector_data(struct hns3_nic_priv *priv)
 		hns3_free_vector_ring_chain(tqp_vector, &vector_ring_chain);
 
 		if (ret)
-			return ret;
+			goto map_ring_fail;
 
 		netif_napi_add(priv->netdev, &tqp_vector->napi,
 			       hns3_nic_common_poll, NAPI_POLL_WEIGHT);
 	}
 
 	return 0;
+
+map_ring_fail:
+	for (j = i - 1; j >= 0; j--)
+		netif_napi_del(&priv->tqp_vector[j].napi);
+
+	return ret;
 }
 
 static int hns3_nic_alloc_vector_data(struct hns3_nic_priv *priv)
-- 
2.7.4