netdev - [PATCH net-next 03/12] net: hns3: fix napi

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Message-ID: <1545133079-79605-4-git-send-email-lipeng321@huawei.com>
Date:   Tue, 18 Dec 2018 19:37:50 +0800
From:   Peng Li <lipeng321@...wei.com>
To:     <davem@...emloft.net>
CC:     <netdev@...r.kernel.org>, <linux-kernel@...r.kernel.org>,
        <linuxarm@...wei.com>, <yisen.zhuang@...wei.com>,
        <salil.mehta@...wei.com>, <lipeng321@...wei.com>
Subject: [PATCH net-next 03/12] net: hns3: fix napi_disable not return problem

From: Huazhong Tan <tanhuazhong@...wei.com>

While doing DOWN, the calling of napi_disable() may not return, since the
napi_complete() in the hns3_nic_common_poll() will never be called when
HNS3_NIC_STATE_DOWN is set. So we need to call napi_complete() before
checking HNS3_NIC_STETE_DOWN.

Fixes: ff0699e04b97 ("net: hns3: stop napi polling when HNS3_NIC_STATE_DOWN is set")
Signed-off-by: Huazhong Tan <tanhuazhong@...wei.com>
Signed-off-by: Peng Li <lipeng321@...wei.com>
---
 drivers/net/ethernet/hisilicon/hns3/hns3_enet.c | 4 ++--
 1 file changed, 2 insertions(+), 2 deletions(-)

diff --git a/drivers/net/ethernet/hisilicon/hns3/hns3_enet.c b/drivers/net/ethernet/hisilicon/hns3/hns3_enet.c
index 2081e2e..e7cde08 100644
--- a/drivers/net/ethernet/hisilicon/hns3/hns3_enet.c
+++ b/drivers/net/ethernet/hisilicon/hns3/hns3_enet.c
@@ -2909,8 +2909,8 @@ static int hns3_nic_common_poll(struct napi_struct *napi, int budget)
 	if (!clean_complete)
 		return budget;
 
-	if (likely(!test_bit(HNS3_NIC_STATE_DOWN, &priv->state)) &&
-	    napi_complete(napi)) {
+	if (napi_complete(napi) &&
+	    likely(!test_bit(HNS3_NIC_STATE_DOWN, &priv->state))) {
 		hns3_update_new_int_gl(tqp_vector);
 		hns3_mask_vector_irq(tqp_vector, 1);
 	}
-- 
1.9.1