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net: hns3: Fixes the out of bounds access in hclge_map_tqp

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This patch fixes the handling of the check when number of vports
are detected to be more than available TPQs. Current handling causes
an out of bounds access in hclge_map_tqp().

Fixes: 7df7dad633 ("net: hns3: Refactor the mapping of tqp to vport")
Signed-off-by: Huazhong Tan <tanhuazhong@huawei.com>
Signed-off-by: Peng Li <lipeng321@huawei.com>
Signed-off-by: Salil Mehta <salil.mehta@huawei.com>
Signed-off-by: David S. Miller <davem@davemloft.net>
This commit is contained in:
Huazhong Tan 2018-05-01 19:55:59 +01:00 committed by David S. Miller
parent 35f58fd792
commit 38e62046d4
1 changed files with 5 additions and 2 deletions
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7
drivers/net/ethernet/hisilicon/hns3/hns3pf/hclge_main.c
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@ -1459,8 +1459,11 @@ static int hclge_alloc_vport(struct hclge_dev *hdev)
/* We need to alloc a vport for main NIC of PF */
num_vport = hdev->num_vmdq_vport + hdev->num_req_vfs + 1;
if (hdev->num_tqps < num_vport)
num_vport = hdev->num_tqps;
if (hdev->num_tqps < num_vport) {
dev_err(&hdev->pdev->dev, "tqps(%d) is less than vports(%d)",
hdev->num_tqps, num_vport);
return -EINVAL;
}
/* Alloc the same number of TQPs for every vport */
tqp_per_vport = hdev->num_tqps / num_vport;