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

[ Upstream commit 08c965430869ed423921bd9058ae59f75207feb6 ]

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>
Signed-off-by: Sasha Levin <sashal@kernel.org>

diff --git a/drivers/net/ethernet/stmicro/stmmac/stmmac_selftests.c b/drivers/net/ethernet/stmicro/stmmac/stmmac_selftests.c
index ac3f658105c01a39cb9d3a2ba970257bba52c653..a0513deab1a040b4505b490ce415d620ca311694 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;