openkylin
/
linux
mirror of https://gitee.com/openkylin/linux.git
9
0
Fork 0
Code Issues Projects Releases Wiki Activity

net: hns: adds limitation for debug port mtu 

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
Show Stats Download Patch File Download Diff File Expand all files Collapse all files

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