net: hns3: Fix tqp array traversal condition for vf
authorJian Shen <shenjian15@huawei.com>
Fri, 21 Sep 2018 15:41:40 +0000 (16:41 +0100)
committerDavid S. Miller <davem@davemloft.net>
Sat, 22 Sep 2018 02:29:32 +0000 (19:29 -0700)
commitb4f1d30327c831c4582a4e4672a06162ddfd3854
treeea8f999cafa3871627eaf9531a3125b092007217
parent0c218123028f70f97e8419ed8b355fbc5a89b91c
net: hns3: Fix tqp array traversal condition for vf

There are two tqp_num variables "hdev->tqp_num" and "kinfo->tqp_num"
used in VF. "hdev->tqp_num" is the total tqp number allocated to the
VF, and "kinfo->tqp_num" indicates the tqp number being used by the
VF. Usually the two variables are equal. But for the case hdev->tqp_num
larger than rss_size_max, and num_tc is 1, "kinfo->tqp_num" will be
less than "hdev->tqp_num".

In original codes, "hdev->tqp_num" is always used to traverse the
tqp array of kinfo. It may cause null pointer error when "hdev->tqp_num"
is larger than "kinfo->tqp_num"

Fixes: e2cb1dec9779 ("net: hns3: Add HNS3 VF HCL(Hardware Compatibility Layer) Support")
Signed-off-by: Jian Shen <shenjian15@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>
drivers/net/ethernet/hisilicon/hns3/hns3vf/hclgevf_main.c