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Commit 211b1384 authored by Kejian Yan's avatar Kejian Yan Committed by David S. Miller
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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: default avatarKejian Yan <yankejian@huawei.com>
Signed-off-by: default avatarYisen Zhuang <Yisen.Zhuang@huawei.com>
Signed-off-by: default avatarDavid S. Miller <davem@davemloft.net>
parent da3488bb

drivers/net/ethernet/hisilicon/hns/hns_dsaf_mac.c

+3 −0
Original line number Diff line number Diff line
@@ -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;

drivers/net/ethernet/hisilicon/hns/hns_dsaf_mac.h

+1 −0
Original line number Diff line number Diff line
@@ -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