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net: stmmac: Fix VLAN filtering when HW does not support it

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If we don't have any filters available we can't rely upon the return
code of stmmac_add_hw_vlan_rx_fltr() / stmmac_del_hw_vlan_rx_fltr(). Add
a check for this.

Fixes: ed64639bc1 ("net: stmmac: Add support for VLAN Rx filtering")
Signed-off-by: Jose Abreu <Jose.Abreu@synopsys.com>
Signed-off-by: David S. Miller <davem@davemloft.net>
This commit is contained in:
Jose Abreu 2020-04-01 19:29:03 +02:00 committed by David S. Miller
parent cc213f8c47
commit dd6a4998e6
1 changed files with 12 additions and 5 deletions
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17
drivers/net/ethernet/stmicro/stmmac/stmmac_main.c
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@ -4566,9 +4566,13 @@ static int stmmac_vlan_rx_add_vid(struct net_device *ndev, __be16 proto, u16 vid
return ret; return ret;
} }
ret = stmmac_add_hw_vlan_rx_fltr(priv, ndev, priv->hw, proto, vid); if (priv->hw->num_vlan) {
ret = stmmac_add_hw_vlan_rx_fltr(priv, ndev, priv->hw, proto, vid);
if (ret)
return ret;
}
return ret; return 0;
} }
static int stmmac_vlan_rx_kill_vid(struct net_device *ndev, __be16 proto, u16 vid) static int stmmac_vlan_rx_kill_vid(struct net_device *ndev, __be16 proto, u16 vid)
@ -4581,9 +4585,12 @@ static int stmmac_vlan_rx_kill_vid(struct net_device *ndev, __be16 proto, u16 vi
is_double = true; is_double = true;
clear_bit(vid, priv->active_vlans); clear_bit(vid, priv->active_vlans);
ret = stmmac_del_hw_vlan_rx_fltr(priv, ndev, priv->hw, proto, vid);
if (ret) if (priv->hw->num_vlan) {
return ret; ret = stmmac_del_hw_vlan_rx_fltr(priv, ndev, priv->hw, proto, vid);
if (ret)
return ret;
}
return stmmac_vlan_update(priv, is_double); return stmmac_vlan_update(priv, is_double);
} }