net: stmmac: selftests: Needs to check the number of Multicast regs

When running the MC and UC filter tests we setup a multicast address
that its expected to be blocked. If the number of available multicast
registers is zero, driver will always pass the multicast packets which
will fail the test.

Check if available multicast addresses is enough before running the
tests.

Fixes: 091810dbded9 ("net: stmmac: Introduce selftests support")
Signed-off-by: Jose Abreu <Jose.Abreu@synopsys.com>
Signed-off-by: David S. Miller <davem@davemloft.net>

diff --git a/drivers/net/ethernet/stmicro/stmmac/stmmac_selftests.c b/drivers/net/ethernet/stmicro/stmmac/stmmac_selftests.c
index f3d8b9336b8e377f3eadc13031cf043f88f1a4d2..13227909287c03010189e00e7878029e08010d55 100644 (file)
--- a/drivers/net/ethernet/stmicro/stmmac/stmmac_selftests.c
+++ b/drivers/net/ethernet/stmicro/stmmac/stmmac_selftests.c
@@ -624,6 +624,8 @@ static int stmmac_test_mcfilt(struct stmmac_priv *priv)
                return -EOPNOTSUPP;
        if (netdev_uc_count(priv->dev) >= priv->hw->unicast_filter_entries)
                return -EOPNOTSUPP;
+       if (netdev_mc_count(priv->dev) >= priv->hw->multicast_filter_bins)
+               return -EOPNOTSUPP;
 
        while (--tries) {
                /* We only need to check the mc_addr for collisions */
@@ -666,6 +668,8 @@ static int stmmac_test_ucfilt(struct stmmac_priv *priv)
 
        if (stmmac_filter_check(priv))
                return -EOPNOTSUPP;
+       if (netdev_uc_count(priv->dev) >= priv->hw->unicast_filter_entries)
+               return -EOPNOTSUPP;
        if (netdev_mc_count(priv->dev) >= priv->hw->multicast_filter_bins)
                return -EOPNOTSUPP;