redonkable/alistair23-linux
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net: hns: adds limitation for debug port mtu

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If mtu for debug port is set more than 1500, it may cause that packets
are dropped by ppe. So maximum value for debug port should be 1500.

Signed-off-by: Kejian Yan <yankejian@huawei.com>
Signed-off-by: Yisen Zhuang <Yisen.Zhuang@huawei.com>
Signed-off-by: David S. Miller <davem@davemloft.net>
This commit is contained in:
Kejian Yan 2016-03-22 16:06:30 +08:00 committed by David S. Miller
parent da3488bbde
commit 211b138403
2 changed files with 4 additions and 0 deletions
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3
drivers/net/ethernet/hisilicon/hns/hns_dsaf_mac.c
View file

@ -470,6 +470,9 @@ int hns_mac_set_mtu(struct hns_mac_cb *mac_cb, u32 new_mtu)
u32 max_frm = AE_IS_VER1(mac_cb->dsaf_dev->dsaf_ver) ?
MAC_MAX_MTU : MAC_MAX_MTU_V2;
if (mac_cb->mac_type == HNAE_PORT_DEBUG)
max_frm = MAC_MAX_MTU_DBG;
if ((new_mtu < MAC_MIN_MTU) || (new_frm > max_frm) ||
(new_frm > HNS_RCB_RING_MAX_BD_PER_PKT * buf_size))
return -EINVAL;

1
drivers/net/ethernet/hisilicon/hns/hns_dsaf_mac.h
View file

@ -28,6 +28,7 @@ struct dsaf_device;
#define MAC_MAX_MTU 9600
#define MAC_MAX_MTU_V2 9728
#define MAC_MIN_MTU 68
#define MAC_MAX_MTU_DBG MAC_DEFAULT_MTU
#define MAC_DEFAULT_PAUSE_TIME 0xff