From: Xi Wang <wangxi11@huawei.com>
Date: Mon, 4 Jun 2018 17:50:09 +0100
Subject: net: hns: Fix the process of adding broadcast addresses to tcam
Patch-mainline: v4.18-rc1
Git-commit: f0b964e5e4bb6b0c152f8064bb69a0f3d32a5096
References: bsc#1104353 FATE#326415

If the multicast mask value in device tree is configured not all
0xff, the broadcast mac will be lost from tcam table after the
execution of command 'ifconfig up'. The address is appended by
hns_ae_start, but will be clear later by hns_nic_set_rx_mode
called in dev_open process.

This patch fixed it by not use the multicast mask when add a
broadcast address.

Fixes: b5996f11ea54 ("net: add Hisilicon Network Subsystem basic ethernet support")
Signed-off-by: Xi Wang <wangxi11@huawei.com>
Signed-off-by: Peng Li <lipeng321@huawei.com>
Signed-off-by: Salil Mehta <salil.mehta@huawei.com>
Signed-off-by: David S. Miller <davem@davemloft.net>
Acked-by: Thomas Bogendoerfer <tbogendoerfer@suse.de>
---
 drivers/net/ethernet/hisilicon/hns/hns_dsaf_main.c |   23 ++++++++++++++++-----
 1 file changed, 18 insertions(+), 5 deletions(-)

--- a/drivers/net/ethernet/hisilicon/hns/hns_dsaf_main.c
+++ b/drivers/net/ethernet/hisilicon/hns/hns_dsaf_main.c
@@ -1648,6 +1648,15 @@ int hns_dsaf_rm_mac_addr(
 				      mac_entry->addr);
 }
 
+static void hns_dsaf_setup_mc_mask(struct dsaf_device *dsaf_dev,
+				   u8 port_num, u8 *mask, u8 *addr)
+{
+	if (MAC_IS_BROADCAST(addr))
+		memset(mask, 0xff, ETH_ALEN);
+	else
+		memcpy(mask, dsaf_dev->mac_cb[port_num]->mc_mask, ETH_ALEN);
+}
+
 static void hns_dsaf_mc_mask_bit_clear(char *dst, const char *src)
 {
 	u16 *a = (u16 *)dst;
@@ -1676,7 +1685,6 @@ int hns_dsaf_add_mac_mc_port(struct dsaf
 	struct dsaf_drv_tbl_tcam_key tmp_mac_key;
 	struct dsaf_tbl_tcam_data tcam_data;
 	u8 mc_addr[ETH_ALEN];
-	u8 *mc_mask;
 	int mskid;
 
 	/*chechk mac addr */
@@ -1687,9 +1695,12 @@ int hns_dsaf_add_mac_mc_port(struct dsaf
 	}
 
 	ether_addr_copy(mc_addr, mac_entry->addr);
-	mc_mask = dsaf_dev->mac_cb[mac_entry->in_port_num]->mc_mask;
 	if (!AE_IS_VER1(dsaf_dev->dsaf_ver)) {
+		u8 mc_mask[ETH_ALEN];
+
 		/* prepare for key data setting */
+		hns_dsaf_setup_mc_mask(dsaf_dev, mac_entry->in_port_num,
+				       mc_mask, mac_entry->addr);
 		hns_dsaf_mc_mask_bit_clear(mc_addr, mc_mask);
 
 		/* config key mask */
@@ -1844,7 +1855,6 @@ int hns_dsaf_del_mac_mc_port(struct dsaf
 	struct dsaf_drv_tbl_tcam_key mask_key, tmp_mac_key;
 	struct dsaf_tbl_tcam_data *pmask_key = NULL;
 	u8 mc_addr[ETH_ALEN];
-	u8 *mc_mask;
 
 	if (!(void *)mac_entry) {
 		dev_err(dsaf_dev->dev,
@@ -1861,14 +1871,17 @@ int hns_dsaf_del_mac_mc_port(struct dsaf
 
 	/* always mask vlan_id field */
 	ether_addr_copy(mc_addr, mac_entry->addr);
-	mc_mask = dsaf_dev->mac_cb[mac_entry->in_port_num]->mc_mask;
 
 	if (!AE_IS_VER1(dsaf_dev->dsaf_ver)) {
+		u8 mc_mask[ETH_ALEN];
+
 		/* prepare for key data setting */
+		hns_dsaf_setup_mc_mask(dsaf_dev, mac_entry->in_port_num,
+				       mc_mask, mac_entry->addr);
 		hns_dsaf_mc_mask_bit_clear(mc_addr, mc_mask);
 
 		/* config key mask */
-		hns_dsaf_set_mac_key(dsaf_dev, &mask_key, 0x00, 0xff, mc_addr);
+		hns_dsaf_set_mac_key(dsaf_dev, &mask_key, 0x00, 0xff, mc_mask);
 
 		mask_key.high.val = le32_to_cpu(mask_key.high.val);
 		mask_key.low.val = le32_to_cpu(mask_key.low.val);