[PATCH net-next v01 14/15] hinic3: Add MTU size validation
From: Fan Gong <gongfan1@huawei.com>
Date: 2026-02-24 13:16:28
Also in:
linux-doc, lkml
Subsystem:
huawei 3rd gen ethernet driver, networking drivers, the rest · Maintainers:
Fan Gong, Andrew Lunn, "David S. Miller", Eric Dumazet, Jakub Kicinski, Paolo Abeni, Linus Torvalds
Co-developed-by: Zhu Yikai <redacted> Signed-off-by: Zhu Yikai <redacted> Signed-off-by: Fan Gong <gongfan1@huawei.com> --- drivers/net/ethernet/huawei/hinic3/hinic3_nic_cfg.c | 13 +++++++++++++ 1 file changed, 13 insertions(+)
diff --git a/drivers/net/ethernet/huawei/hinic3/hinic3_nic_cfg.c b/drivers/net/ethernet/huawei/hinic3/hinic3_nic_cfg.c
index a1a193201afd..521035b47932 100644
--- a/drivers/net/ethernet/huawei/hinic3/hinic3_nic_cfg.c
+++ b/drivers/net/ethernet/huawei/hinic3/hinic3_nic_cfg.c@@ -246,6 +246,19 @@ int hinic3_set_port_mtu(struct net_device *netdev, u16 new_mtu) struct l2nic_func_tbl_cfg func_tbl_cfg = {}; struct hinic3_hwdev *hwdev = nic_dev->hwdev; + if (new_mtu < HINIC3_MIN_MTU_SIZE) { + dev_err(hwdev->dev, + "Invalid mtu size: %ubytes, mtu size < %ubytes\n", + new_mtu, HINIC3_MIN_MTU_SIZE); + return -EINVAL; + } + + if (new_mtu > HINIC3_MAX_JUMBO_FRAME_SIZE) { + dev_err(hwdev->dev, "Invalid mtu size: %ubytes, mtu size > %ubytes\n", + new_mtu, HINIC3_MAX_JUMBO_FRAME_SIZE); + return -EINVAL; + } + func_tbl_cfg.mtu = new_mtu; return hinic3_set_function_table(hwdev, BIT(L2NIC_FUNC_TBL_CFG_MTU),
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2.43.0