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From: Huazhong Tan <tanhuazhong@huawei.com>
To: <davem@davemloft.net>
Cc: <netdev@vger.kernel.org>, <linux-kernel@vger.kernel.org>,
	<huangdaode@hisilicon.com>, <yisen.zhuang@huawei.com>,
	<salil.mehta@huawei.com>, <linuxarm@huawei.com>,
	liuzhongzhu <liuzhongzhu@huawei.com>,
	Peng Li <lipeng321@huawei.com>,
	Huazhong Tan <tanhuazhong@huawei.com>
Subject: [PATCH net-next 12/12] net: hns3: MAC table entry count function increases operation 0 value protection measures
Date: Sat, 2 Feb 2019 22:39:37 +0800	[thread overview]
Message-ID: <20190202143937.8924-13-tanhuazhong@huawei.com> (raw)
In-Reply-To: <20190202143937.8924-1-tanhuazhong@huawei.com>

From: liuzhongzhu <liuzhongzhu@huawei.com>

When updating the available MAC VLAN table counts,
MAC VLAN table entry count function adds
operation 0 value protection measures.

Signed-off-by: liuzhongzhu <liuzhongzhu@huawei.com>
Signed-off-by: Peng Li <lipeng321@huawei.com>
Signed-off-by: Huazhong Tan <tanhuazhong@huawei.com>
---
 drivers/net/ethernet/hisilicon/hns3/hns3pf/hclge_main.c | 7 +++++--
 1 file changed, 5 insertions(+), 2 deletions(-)

diff --git a/drivers/net/ethernet/hisilicon/hns3/hns3pf/hclge_main.c b/drivers/net/ethernet/hisilicon/hns3/hns3pf/hclge_main.c
index f55835dee5c7..0a64c7f2dc6c 100644
--- a/drivers/net/ethernet/hisilicon/hns3/hns3pf/hclge_main.c
+++ b/drivers/net/ethernet/hisilicon/hns3/hns3pf/hclge_main.c
@@ -5830,9 +5830,12 @@ static void hclge_update_umv_space(struct hclge_vport *vport, bool is_free)
 	if (is_free) {
 		if (vport->used_umv_num > hdev->priv_umv_size)
 			hdev->share_umv_size++;
-		vport->used_umv_num--;
+
+		if (vport->used_umv_num > 0)
+			vport->used_umv_num--;
 	} else {
-		if (vport->used_umv_num >= hdev->priv_umv_size)
+		if (vport->used_umv_num >= hdev->priv_umv_size &&
+		    hdev->share_umv_size > 0)
 			hdev->share_umv_size--;
 		vport->used_umv_num++;
 	}
-- 
2.20.1



  parent reply	other threads:[~2019-02-02 14:41 UTC|newest]

Thread overview: 15+ messages / expand[flat|nested]  mbox.gz  Atom feed  top
2019-02-02 14:39 [PATCH net-next 00/12] code optimizations & bugfixes for HNS3 driver Huazhong Tan
2019-02-02 14:39 ` [PATCH net-next 01/12] net: hns3: fix a code style issue for hns3_update_new_int_gl() Huazhong Tan
2019-02-02 14:39 ` [PATCH net-next 02/12] net: hns3: fix an issue for hns3_update_new_int_gl Huazhong Tan
2019-02-02 14:39 ` [PATCH net-next 03/12] net: hns3: Modify parameter type from int to bool in set_gro_en Huazhong Tan
2019-02-02 14:39 ` [PATCH net-next 04/12] net: hns3: code optimization for hclge_rx_buffer_calc Huazhong Tan
2019-02-02 14:39 ` [PATCH net-next 05/12] net: hns3: add hclge_cmd_check_retval() to parse comman's return value Huazhong Tan
2019-02-02 14:39 ` [PATCH net-next 06/12] net: hns3: move some set_bit statement into hclge_prepare_mac_addr Huazhong Tan
2019-02-02 14:39 ` [PATCH net-next 07/12] net: hns3: fix a wrong checking in the hclge_tx_buffer_calc() Huazhong Tan
2019-02-02 14:39 ` [PATCH net-next 08/12] net: hns3: fix the problem that the supported port is empty Huazhong Tan
2019-02-02 14:39 ` [PATCH net-next 09/12] net: hns3: optimize the maximum TC macro Huazhong Tan
2019-02-02 14:39 ` [PATCH net-next 10/12] net: hns3: don't allow user to change vlan filter state Huazhong Tan
2019-02-03  7:42   ` Sergei Shtylyov
2019-02-02 14:39 ` [PATCH net-next 11/12] net: hns3: modify the upper limit judgment condition Huazhong Tan
2019-02-02 14:39 ` Huazhong Tan [this message]
2019-02-02 16:48 ` [PATCH net-next 00/12] code optimizations & bugfixes for HNS3 driver David Miller

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