diff mbox series

[net-next,4/9] net: hns3: add max vector number check for pf

Message ID 1545277926-66432-5-git-send-email-lipeng321@huawei.com
State Accepted, archived
Delegated to: David Miller
Headers show
Series net: hns3: code optimizations & bugfixes for HNS3 driver | expand

Commit Message

lipeng (Y) Dec. 20, 2018, 3:52 a.m. UTC 
From: Jian Shen <shenjian15@huawei.com>

Each pf supports max 64 vectors and 128 tqps. For 2p/4p core scenario,
there may be more than 64 cpus online. So the result of min_t(u16,
num_Online_cpus(), tqp_num) may be more than 64. This patch adds check
for the vector number.

Fixes: dd38c72604dc ("net: hns3: fix for coalesce configuration lost during reset")
Signed-off-by: Jian Shen <shenjian15@huawei.com>
Signed-off-by: Peng Li <lipeng321@huawei.com>
---
 drivers/net/ethernet/hisilicon/hns3/hns3_enet.c | 4 ++++
 1 file changed, 4 insertions(+)
diff mbox series

Patch

diff --git a/drivers/net/ethernet/hisilicon/hns3/hns3_enet.c b/drivers/net/ethernet/hisilicon/hns3/hns3_enet.c
index becbf86..624b8a7 100644
--- a/drivers/net/ethernet/hisilicon/hns3/hns3_enet.c
+++ b/drivers/net/ethernet/hisilicon/hns3/hns3_enet.c
@@ -3118,6 +3118,8 @@  static int hns3_nic_init_vector_data(struct hns3_nic_priv *priv)
 
 static int hns3_nic_alloc_vector_data(struct hns3_nic_priv *priv)
 {
+#define HNS3_VECTOR_PF_MAX_NUM		64
+
 	struct hnae3_handle *h = priv->ae_handle;
 	struct hns3_enet_tqp_vector *tqp_vector;
 	struct hnae3_vector_info *vector;
@@ -3130,6 +3132,8 @@  static int hns3_nic_alloc_vector_data(struct hns3_nic_priv *priv)
 	/* RSS size, cpu online and vector_num should be the same */
 	/* Should consider 2p/4p later */
 	vector_num = min_t(u16, num_online_cpus(), tqp_num);
+	vector_num = min_t(u16, vector_num, HNS3_VECTOR_PF_MAX_NUM);
+
 	vector = devm_kcalloc(&pdev->dev, vector_num, sizeof(*vector),
 			      GFP_KERNEL);
 	if (!vector)